20060329Pilot programs final report.pdf

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DAHO
POWER (8)
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An IDACORP Company
PETER P. PENGILL Y
Senior Analyst
Pricing & Regulatory Services
, ':, , ::" ,: \' ::; ,..
[phone]
FAX [phone]
ppenClillv~idahopower.com
March 29, 2006
Ms. Jean Jewell
Commission Secretary
Idaho Public Utilities Commission
472 West Washington Street
PO Box 83720
Boise , Idaho 83.720-0074
RE:Time-ot-Day and Energy Watch Pilot Programs Final Report
Case No. IPC-05-
Dear Ms. Jewell:
Enclosed please find an original and seven copies ot Idaho Power s Time-ot-Day and
Energy Watch Pilot Programs final report. This report is filed in compliance with Idaho Public
Utilities Commission Order No. 29737.
It you have questions regarding this report, please direct them to Maggie Britz at 388-
2848 or me at 388-2281.
PPP:ma
Enclosures
Ric Gale
Maggie Brilz
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
TIME-OF-DAY AND ENERGY WATCH PILOT PROGRAMS
FINAL REPORT
; . , ,, "
INTRODUCTION:
On February 2, 2005 , Idaho Power Company (Idaho Power or the Company) filed a
request with the Idaho Public Utilities Commission (the Commission) to implement two
pilot programs for residential customers in the Emmett Valley. On March 22, 2005, the
Commission issued Order No. 29737 approving Schedule 4, the Energy Watch Pilot
Program, and Schedule 5, the Time-of-Day Pilot Program. These time-variant pricing
programs offered customers with Advanced Meter Reading (AMR) capability the
opportunity to reduce their electric bills by shifting some of their usage to lower priced
time periods. By shifting their usage, the participants could help reduce the Company
loads during peak hours. The special summer rates for these programs were in effect
from June 1 to August 31 , 2005.
The Time-of-Day Pilot Program is a time-of-use (TaU) pricing program, and the Energy
Watch Pilot Program is a critical peak pricing (CPP) program. TOU and CPP programs
require special metering that can provide subtotals of energy consumption for different
periods when different rates are in effect. The meter data must be collected, validated
and integrated into the billing system to produce the monthly bills. One purpose of the
pilot programs was to test the new AMR and meter data management systems and their
integration with the Company s Customer Information System (CIS) for billing.
The pilot programs allowed Idaho Power to investigate the Company s customers
response to and satisfaction with the programs, to evaluate the impact of the programs on
peak loads and customer bills, and to test the feasibility and scalability of using the new
AMR system together with the existing billing system to implement these programs.
In April and May of 2005, Idaho Power promoted and solicited customer participation in
the Energy Watch and Time of Day Pilot Programs in the Emmett Valley.The
IDAHO
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POWER..
An 'DAceR. Como.ny
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
application deadline for customers to apply to participate in these programs was May 15
2005. This enabled the Company to convert the participants to these new rate schedules
within its CIS and begin billing them by June 1 , 2005. A set of the promotional and
communication materials used for the Energy Watch and Time-of-Day Pilot Programs is
included as (Attachment A).
In September 2005, Northwest Research Group conducted a telephone survey for Idaho
Power residential customers in the Emmett Valley to determine customer awareness and
perceptions of the two pilot programs and of the new AMR technology in general. The
survey included participants and non-participants in both programs.In October
Northwest Research Group presented the survey results in a report entitled Idaho Power
Emmett Study: Final Report (Attachment B).
The Company selected RLW Analytics (RLW) to perform an impact evaluation of the
two pilot programs to determine the effects of the programs on customers' peak loads
energy consumption, and monthly bills. In January 2006, RLW delivered its evaluation
Residential Time-oj-Day and Energy Watch Pilot Program Analysis: Final Report
(Attachment C).
PROGRAM DESIGN:
In an effort to design time-of-use and critical peak pricing programs that customers
would understand and be willing to volunteer to participate in, the Company contracted
with McFain & Associates Research to conduct focus groups with Emmett customers.
Two separate focus groups were conducted on December 7, 2004 at Idaho Power
Emmett office. These focus groups demonstrated to Idaho Power that time-variant
pricing programs were a new concept to most of Idaho Power s customers and that the
promotion of these programs would require an extensive education component. The pilot
programs were designed to be similar to traditional programs operated by other electric
utilities. While some programs at other utilities combine elements of TaU and CPP
IDAHO
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An 'DAceR. comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
rates, after consideration of the focus groups' comments , Idaho Power decided to keep
the programs simple and separate. The Company believed that by designing the Energy
Watch Pilot Program to be independent of time-of-use pricing, the program would be
easier for customers to understand, easier for the Company to market to potential
participants, and allow for a separate evaluation of each pricing strategy.
Time-of-Day Program:
The Time-of-Day program has three pricing blocks during the summer months of June
July, and August.
The following chart shows the time blocks and pricing used during the summer of 2005.
Time-of-Day Program Summer Pricing 2005
Price
Block Days Hours Cents kWh
On-Peak Mon - Fri I p.m. - 9 p.8686~ kWh
Mid-Peak Mon - Fri 7 a.m. - I p.1717~ kWh
Off-Peak Mon - Fri 9 p.m. - 7 a.3004~ kWh
Off-Peak Sat, Sun, July 4th all hours 3004~ kWh
Enen!v Watch Pro2ram:
Traditional critical peak pricing programs usually overlay critical peak pricing on top of a
time-of-use pricing structure. The Energy Watch program is a simplified critical peak
pricing program. For all hours other than during Energy Watch events participants pay a
flat energy rate during the months of June, July and August. During an Energy Watch
event, participants pay a significantly higher rate. Energy Watch events can be called on
up to ten weekdays between June 15 and August 15 between the hours of 5:00-9:00
IDAHO
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An 'DAceR. comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
Participants' electricity rate during Energy Watch events increases to 20i per kWh. For
all hours outside Energy Watch events, participants pay an energy rate equal to the 300
kWh energy rate under rate Schedule 1. Idaho Power s standard summer residential rate
under Schedule 1 is 5.428i per kWh for 300 kWh and 6.0936i per kWh for all usage
greater than 300 kWh.
Energy Watch participants were notified of Energy Watch events by telephone and email
(where available) by 4:00 m. the day preceding an Energy Watch event. The Company
utilized an autodialing system with live operators for the first notification call for each
Energy Watch event. The autodialing system delivered recorded messages for up to two
successive calls if personal contact with the participant was not made.
PROGRAM PROMOTION:
Idaho Power offered three separate programs to Emmett Valley residents during the
summer of 2005: Energy Watch, Time-of-Day, and A/C Cool Credit, Idaho Power
residential air conditioner cycling demand response program.Solicitation for
participation in all three programs occurred simultaneously. However, customers were
eligible to participate in only one of the programs and were asked to specify their choice.
All together approximately 000 Emmett Valley customers received information for
participation in the Time-of-Day and Energy Watch Pilot Programs. The Company used
a combination of promotional techniques.Potential participants received letters
brochures, and postcards by direct mail. Company personnel participated in interviews
which resulted in articles in the local newspaper, specifically the Messenger Index. Idaho
Power also ran advertisements in the Messenger Index describing the programs and
inviting customers to participate.Company representatives appeared at the Emmett
Lions Club, the Emmett Senior Center, and the local Albertson s market to promote the
programs. Through all the promotional materials, customers were invited to visit the
Company s Web site or utilize Idaho Power s Customer Service Center for additional
IDAHO
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An 'DAce.p Comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
information.Attachment A contains a set of the Company s promotional and
communications materials.
Idaho Power utilized a third party software vendor, Nexus Energy Software (Nexus), to
provide customers access to their AMR hourly energy usage through Idaho Power s Web
site. Potential participants were able to view their individual hourly usage data for the
summer of 2004 and use a bill comparison tool to evaluate if they would benefit from the
Time-of-Day program. Customers interested in the Energy Watch program could view
their hourly usage to evaluate how much energy they might typically use during an
Energy Watch event. Since Energy Watch events are not scheduled for specific days
estimating an individual's potential bill impact from participating in the Energy Watch
program was not possible. The following figure illustrates the Nexus display.
Energy Usage
Check out your metered data and load analysis
tips below. To change Meter, Graph, or Date
make your selection and click "View Graph" to
see the results,
Save with the Time.of.Dsy Rate
You could save approximately $23 this summer by
sw~chingtothe new Time of Day pilot program and
making relatively small adjustments to your energy use
during 'Peak' hours,
Meter: 134203134 . Electric
Graph: Total Daily Energy Use
8370 FLORENCE 8T
1!:!1 Date: Aug 2004 !!i.II16 2t1 View graph.
Avg Energy
Daily Energy Use
. On Peak . Mid Peak Off Peak
kWh
. 1
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I '-r---,--J-~~'"1
8/01 8/03 8/05 8/07 8/09 8/11 8/13 8/15 8/17 8/19 8/21 8/23 8/25 8/27 8/29 8/31
Choose a period:Billing cycle ('0 Month Week
IDAHO
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POWER
An 'DAce.. Comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
Promotion of Time-of-Day Display
During the promotional phase of the Time-of-Day and Energy Watch programs thirty-
five potential participants accessed their usage data through the Nexus Energy Software.
Of the 170 customers who applied to participate in the Time-of-Day or Energy Watch
programs, twenty-four viewed their previous summer s usage prior to signing up for a
program. Customers who did not have Internet access or who preferred to have the
Company provide usage information could contact Idaho Power s call center to have a
printed version of the hourly load graph and bill comparison mailed to them.
PROGRAM ENROLLMENT:
The Time-of-Day Pilot Program had 97 customers apply to participate and the Energy
Watch Pilot Program had 80 customers apply to participate. Three Time-of-Day
applicants and one Energy Watch applicant also signed up for Idaho Power s A/C Cool
Credit program. When given the choice of which program to participate in, all four opted
to participate in the A/C Cool Credit program. Two Time-of-Day participants and three
Energy Watch participants quit the programs during the summer. This resulted in a total
of 168 program participants, 92 participants in the Time-of-Day program and 76
participants in the Energy Watch program by the end of August 2005. This participation
represents about a 3.5% response rate for the Time-of-Day and Energy Watch programs
combined with a 2.3% attrition rate*
PROGRAM OPERATION:
Idaho Power strove to operate the Energy Watch and Time-of-Day programs in a manner
that was reflective of fully deployed and widely available programs. In this way the
viability and scalability of these programs could be tested. Idaho Power attempted
automate as many of the operational aspects of these programs as possible, however
more manual intervention than initially anticipated was required in order to operate the
* Excluding those customers who signed up for more than one program and opted to participate in the A/C
Cool Credit program
IDAHO
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POWER
An 'DAce.. Comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
Energy Watch and Time-of-Day programs successfully. The issues requiring manual
intervention must be overcome in order to make these programs more scalable in the
future and to assure accurate and timely billing, customer satisfaction, and make these
programs more cost effective for the Company.
One area where manual intervention was necessary is referred to as a 'virtual' meter
exchange in Idaho Power s CIS. For each customer participating in these programs, it
was necessary to reconfigure their meter type in Idaho Power s CIS. The meter type
must be converted to accept time-variant consumptive values rather than traditional
monthly subtractive meter readings. Currently this is a manual process and no automated
means exist to reconfigure these meter types within Idaho Power s CIS. Because of the
need to reconfigure each participant s meter if time-variant pricing programs are
implemented on mass scale, Idaho Power will need to modify its CIS to enable an
automated approach. This modification was too costly and time intensive to accomplish
for the Time-of-Day and Energy Watch Pilot Programs.
Because of the manual 'virtual' meter exchange process , the Company chose to remove
customers from these programs in the event that they moved during the pilot program
offering. If a participant moved, they were assigned to the standard residential rate at
their new residence. It was difficult to track a customers' movement particularly when
they moved out of the Emmett Valley. If they moved within the Emmett Valley where
these programs were offered, it was difficult to manually accomplish the 'virtual' meter
exchange quickly enough to assure accurate and timely billing. When customers
disconnect at one location, the Company does not always immediately know where the
customer s new location will be or if it will even be within the Company s service
territory.
Another aspect of the time-variant pricing programs that ultimately required manual
intervention was the aggregation and estimation of hourly usage data into billable units
IDAHO"":OW POWER..
An ,DACDRP company
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
and the hand entry of the billable units into the CIS. In order to automate this process
Idaho Power had purchased the Itron EE Meter Data Management System (MDMS) in
the summer of 2004 to validate, estimate, and aggregate meter usage data and create a file
to be passed to Idaho Power s CIS. The inability of the MDMS to pass acceptance
testing prior to or during the pilot programs prevented this process from being automated.
Because of the inability to electronically create a billing file to pass to the CIS , it was
necessary to manually enter this information into Idaho Power s CIS and also necessary
to manually check it for accuracy before customers could be billed. A meter data
management system that is dependable, accurate, scalable, and able to integrate with
other computer systems is essential for offering time-variant pricing programs on a larger
scale.
For the Energy Watch program, the Company called nine Energy Watch events between
June 15th and August 15th. Idaho Power s program manager met with the day-ahead
energy schedulers daily at 10 a.m. to assess whether an Energy Watch event should be
called. At this time the energy schedulers and program manager decided if an Energy
Watch event should be called for the following day. The decision to call an Energy
Watch event was primarily based on forecast temperature, market prices, and energy
availability. The Company also called Energy Watch events throughout the summer in
order to test the processes and procedures needed to operate the program and to assess
customer response and acceptance. The Company called Energy Watch events on: July
, July 13, July 15 , July 21 , July 27, July 29, August 4, August 9, and August 11.
The customer notification by telephone of the Energy Watch customers on the day prior
to an Energy Watch event was very labor intensive. The Company attempted to contact
every Energy Watch participant for each Energy Watch event using live operators on the
first notification call. If the participant was not reached on the first call, an autodialing
system delivered recorded messages for up to two successive calls announcing an Energy
Watch event. The decision to call an Energy Watch event was made at approximately
IDAHO
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POWER..
An 'DAce.. Comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
m. and participant notification by email and telephone was completed by 4:00 p.m. on
the day preceding an Energy Watch event.
The following table displays the results of the telephone notification.
717/2005
7/13/2005
7/15/2005
7/21/2005
7/27/2005
7/29/2005
8/4/2005
8/9/2005
8/11/2005
Averae:e
Live Recording Recording
Operator Connects Connects No
Connects Customers Machines Answer Busy
Immediate
Hang-ups
OptedOut ForwardedDate
Results of Telephone Contact of Energy Watch Customers
For the pilot program this method of telephone contact was valuable to obtain immediate
customer feed-back. For example, several customers voiced their concern about having
consecutive Energy Watch events and many customers did not like having Energy Watch
events on Fridays. This information was anecdotal but was valuable to obtain as the pilot
program was operated.
Thirty-two of the Energy Watch participants had email addresses and were notified via
email in addition to telephone notification. Energy Watch event notification via email
worked well. It was fast, efficient, and the customer feed-back was positive. In order to
expedite customer notification of Energy Watch events for any critical peak pricing
programs in the future, the Company would prefer using email notification and
autodialed recorded messages.
IDAHO
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POWER..
An 'DAce.. Company
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
PROGRAM RESULTS:
In September 2005, Idaho Power contracted with Northwest Research Group, Inc. to
conduct a survey to determine the awareness and perceptions of Idaho Power s service
since installing the new AMR technology and to gain awareness and perceptions of the
Time-of-Day and Energy Watch programs. A telephone survey targeting 560 customers
with AMR capability was conducted in Idaho Power s Emmett Valley. Four hundred
customers that did not choose to participate in the pricing programs and 160 program
participants were targeted for the survey. Surveys were completed with 406 non-
participants and 127 program participants (66 Time-of-Day and 61 Energy Watch
participants ).
For survey results, see Northwest Research Group s Final Report (Attachment B).
The Company contracted with RL W to validate the hourly data and to evaluate the peak
impacts, energy impacts, and bill impacts for the Energy Watch and Time-of-Day
participants. RL W also analyzed weather data to determine the relationship between
weather and peak reduction for these programs.
In order to analyze the impacts of the Time-of-Day and the Energy Watch programs
RL W selected a control group for each program from the general population pool of
Emmett customers.The control groups were selected by examining the correlation
between the energy usage patterns of pilot program participants and the customers in the
control group pool during the summer of 2004. A control group of approximately five
similar" customers was selected for each pilot program participant. The hourly usage
data collected in the summer of 2004 was not always contiguous because of the fact that
the Company was installing a new AMR system at the same time it was collecting hourly
data. Although the 2004 hourly data was non-contiguous and not suitable for load and
bill analysis comparisons, it was very adequate for selecting control groups. A control
group of 420 customers was selected for the Time-of-Day program and a control group of
357 customers was selected for the Energy Watch program.
IDAHO
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POWER..
An 'DACD'. Comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
For the results of this analysis, see Attachment C, a copy of the RLW Analytic s final
report.
FUTURE OF THE TIME-OF-DAY AND ENERGY WATCH PROGRAMS:
On March 3, 2005, the Company filed Case No. IPC-06-5 with the Commission
requesting that the Company be allowed to continue to offer the Time-of-Day and Energy
Watch pilot programs until April 1 , 2007. Continuing these programs will enable Idaho
Power to test new marketing strategies, to continue refining and testing electronic data
transfer, billing, and customer related issues. The Company anticipates testing the
automation of several of the operations needed to offer the Time-of-Day and Energy
Watch Programs in the summer of 2006. In the filing the Company proposed to make
very few changes to the Energy Watch program and to increase the price differential
between the pricing blocks for the Time-of-Day program. By implementing new pricing
differentials for the Time-of-Day program, the Company can evaluate potential changes
in customer electric usage and price elasticity. For the 2006 program, the Company also
proposed to require that customers have a minimum monthly usage of 300 kWh in order
to participate in the programs.
In general, the customer survey information, data analysis, and information obtained from
speaking directly to program participants indicates that most customers were reasonably
satisfied with the Time-of-Day and Energy Watch pilot programs offered in 2005.
IDAHO
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POWER
An 'DAce.. Comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
ATTACHMENTS:
Attachment A: Time-of-Day and Energy Watch promotional materials
Attachment B: Idaho Power Emmett Study
Northwest Research Group
225 North 9th Street, Suite 200
Boise, ID 83702
Attachment C: Residential Time-of-Day and Energy Watch Pilot Program Analysis
RLW Analytics
2 Hyde Road
Clarklake, MI 49234
IDAHO
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An 'DAce.. Comoany
Final Report
Time-of-Day and Energy Watch Pilot Programs
Attachment A
Mm:c~:29 2006
,.. " - '' ..; ".;' '' -' ',; -:,.,) ,
-sJ IDAHO
-.:
POWER.
An 'DACe.. Company
Learn About Summer Programs
Now Available to our
Emmett Valley Customers
Saturday, April 30
10 a.m. to 4 p.
Albertson s, 640 Hwy 16 in Emmett
AIC Cool Credit 0 Time-at-Day e Energy Watch
"~c",c",
...
Visit with Idaho Power representatives to learn more
about these voluntary programs that may reduce
your power bill and help us reduce demand on the
electrical system this summer.
The deadline for participation in one of these
programs is May 15. For more information visit
www.idahopower.com/EnergyCenter or call
388.2323.
If you have already signed up for one of these programs, thank you for
your participation.
nt\HO
...:
POWERiID
An IDACORP Company
Messenger Index 03/21/200606:04 PM
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TUBSdZl1j March 21, 2006
Serving Gem County, Idaho
since 1893
an edition oHhe Idaho PRESS TRIBUNE
Idaho Power offers special programs to Gem County
customers
by Leah Hopkins
As we experience year after
year of drought, hydroelectric
power gets more expensive.
Idaho Power has chosen
Emmett as a testing ground
for some innovative billing
programs. They encourage
customers to conserve during
times of peak usage.
These programs will be
facilitated by the new
automated meters installed in Emmett last year. They are offered
for residents to participate in voluntarily.
Energy Watch
In Energy Watch , residential customers who have AMR
(Advanced Meter Reading) in the Emmett Valley would be
charged the lowest residential rate during all times of day, for the
entire summer, except for four-hour Energy Watch time blocks
which would occur 5-9 p.m. on 10 different days between June 15
and Aug. 15.
The current residential rate is 5.1 cents per kWh for the first 300
kWh you use and 5.7 cents for all kWh over 300 kWh used.
Under this example , participants in Energy Watch would be
charged 5.1 cents per kWh for all usage except for the Energy
Watch hours (10 time blocks). During the time blocks, the price
will be expensive-more than 20 cents per kWh , or about four
times the normal rate.
However, customers will be notified by telephone and/or email the
day prior to Energy Watch being activated. During the Energy
Watch hours , customers will be encouraged to use as little energy
~~ -~~~
:I..I~
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A kWh is the unit Idaho Power uses to measure your electricity
usage each month. One kilowatt-hour is 1 000 watts of electricity
used for one hour. For example, if you operate a 1 ,ODD-watt
microwave for one hour, or if you operate a 1 DO-watt light bulb for
10 hours, each will use one kilowatt-hour of electricity.
Time-at-Day
Time-of-Day is a voluntary program where residential customers
who have AMR (Advanced Meter Reading) in the Emmett Valley
would pay three different prices for electricity during June, July
and August , depending on what time of day it's used: On-Peak
time is the most expensive, Off-Peak is least expensive and Mid-
Peak is in between.
The Time-of-Day periods for the program are:
. On-Peak: 1-9 p.m. weekdays, except holidays (about 6.4 cents per kWh)
. Mid.Peak: 7 a.m. to 1 p.m. weekdays, except holidays (about 5.8 cents per kWh)
. Off-Peak: 9 p.m. to 7 a.m. weekdays. Saturdays, Sundays and holidays are entirely
Off-Peak (about 4.9 cents per kWh)
During the non-summer months, the price per kWh is 5.1 cents for all electricity, nomatter how much you use or when you use it. The Time-of-Day program will remain in
effect until April 1, 2006.
All Idaho Power rates will change as of June 1 , but the On-Peak price will remain about
30 percent greater than the Off- Peak price, and the Mid -Peak price will remain about 17
percent greater than the Off-Peak price.
AIC Cool Credit
This method is for customers who have a necessity for electricity during periods of heavy
use in the summer. Idaho Power will install a "switch" on or near participants' airconditioning units that will allow the company to manage their air conditioners by turning
them on and off for a limited period of time. In essence, a small effort on the part of
individual customers results in a big difference in the amount of electricity needed on hot
summer afternoons.
Only customers with central air will be able to participate in this one. Renters may
participate by filling out a landlord approval form, available by calling 866-865-COOL.Emmett Messenger-Index Copyright (f) 2006
http:/ /www.messenger-index.com/articies/2005/04/ 2 7/ news/ power .txt
03/21/200606:05 PM
Page 2 of 2
Apri/2005
Dear Customer
Recently, you received information about some new innovative programs that Idaho Power
offering our residential customers in the Emmett area this summer:
AlC Cool Credit Time-of-Day Energy Watch
REMEMBER - To participate in one of these programs , you must take action by May 15.
Learn more about these voluntary programs that may lower your power bill and help us reduce
demand on the electrical system this summer. Visit with Idaho Power representatives at your
local Albertson s store, 640Hwy 16, on Saturday, April 30 from 10a.m. to 4 p.m. You will also
find program information and application forms at the Energy Center at www.idahopower.com:
If you have already signed up for one of these programs, thank you for your participation.
If you have any questions call us at 388.2323.
Thank you
Idaho Power Company H=R~
An 10ACORP company
IDAHO
-..:.....
POWER ~
An IDACORP Company
IDAHO POWER COMPANY
PO, BOX 70
BOISE, IDAHO B3707
Presort First Class
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IDAHO.N POWER CID
An IDACDRP Company
BUSINESS REPLY MAIL
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POSTAGE WILL BE PAID BY ADDRESSEE
Time-at-Day Program Manager
IDAHO POWER COMPANY
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BOISE ID 83707-9952
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When possible, shift your
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DAHO
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IDAHO POWER COMPANY
O, BOX 70
BOISE, IDAHO 83707
May 19, 2005
We are pleased to inform you that you have been accepted into idaho Power s Time-of-Day
pilot program.
We appreciate your interest in participating in this program that will help reduce the demand
on our electrical system during peak times this summer, as well as allow you the opportunity
to pay less for your electricity and possibly reduce your overall power bitl in June, July, and
August.
Effective June 1 , 2005, your power usage will be billed according to three separate timeperiods:
On-Peakbetween 1 p.m. and 9 p.m. weekdays (most expensive)
Mid-Peak between 7 a.m. and 1 p.m. weekdays (less expensive)
Off-Peak between 9 p.m. and 7 a.m. weekdays, all weekend hours, and the
July 4th holiday (least expensive)
Your monthly bill witl specify your usage for each of these time periods and reflect the rates for
each. You may reduce your overall power bill during June, July, and August by using less
energy during the On-Peak and Mid-Peak hours and shifting your usage to the Off-Peak
hours.
Some of the appliances that use the most power in your home are the air conditioner, ovenclothes dryer, and electric water heater. To remember when the On-Peak periods (most
expensive) are in effect, we have enclosed vinyl stickers you may adhere to some of your
appliances to assist in considering whether use of the appliance could be shifted to the Off-
Peak (least expensive) time period. While we don t recommend placing a vinyl sticker on your
oven , place it nearby to remember that not only does an electric oven utilize electricity, it also
warms your dwelling, which can cause an increase in your air conditioner use to cool yourspace.
As a customer with Advanced Meter Reading (AMR), you will have access to your electric
usage data by either contacting us by phone or using your computer to utitize enhanced
E-services tools at Idaho Power s Web site. If you choose to use your computer, go to
E-services at www.idahopower-com and register as an Account Manager and youwitl be able
to view your recent account data as well as energy efficiency tips and tools to help you better
understand your energy usage. If you do not have Internet access, you may call Idaho Power
at 388-2323 and request a printed copy be sent to you.
Please note that if you should move from your residence this summer, we cannot extend
continuation in this program and your account would revert to standard residential rates.
Please feel free to contact us if you have any questions, requests, or need additional stickers.You may call Customer Service at 388-2323 from the Emmett Valley, or 1-800-488-6151 , fromelsewhere. When prompted by our Power Assistance Line (PAL), please say "residentialservices" then say "programs" when prompted again. Personal assistance is available
weekdays from 7:30 a.m. to 6:30 p.
Again , thank you for participating in the Time of Day pilot program and taking action to help
reduce demand on the electrical system during peak usage times.
Sincerely,
6ilffl2f(f
Pete Pengilly
Program Manager
Time-ot-Day
Frequently Asked Questions
The following FAQs and answers will provide more details aboUt Idaho Power s Time-of-Day program, available
to customers in Emmett and Letha who have Advanced Meter Reading (AMR) meters,
What is the Time-at-Day program?
Time-of- Day is a voluntary program where residential customers who have AMR (Advanced Meter Reading) in
the Emmett Valley would pay three different prices for electricity during the summer, depending on what time of
day it s used: On-Peak time is the most expensive, Off-Peak is least expensive and Mid-Peak is in betWeen,
The Time-of-Day periods for the program are:
. On-Peak: 1 to 9 p,m. weekdays, except holidays
. Mid-Peak: 7 a,m. to 1 p.m, weekdays, except holidays
. Off-Peak: 9 p,m, to 7 a,m, weekdays, Saturdays, Sundays and holidays are entirely Off-Peak.
How much would each at these blocks cost per kWh?
During the summer months (June, July and August), the price per kWh is:
. About 6.4 cents for On-Peak
. About 5,8 cents for Mid-Peak
. About 4,9 cents for Off-Peak
During the non-summer months the price per kWh is 5.1 cents for all electricity, no matter how much you use or
when you use it. The Time-of-Day program will remain in effect until April 1, 2006. A kWh is the unit Idaho
Power uses to measure your electricity usage each month, One kilowatt-hour is 1,000 watts of electricity used for
one hour. For example, if you operate a 1,000-watt microwave oven for one hour, or if you operate a 1O0-watt light
bulb for 10 hours, each will use one kilowatt-hour of electricity,
All Idaho Power rates will change as ofJune 1,2005, but the On-Peak price will remain about 30 percent greater
than the Off-Peak price, and the Mid-Peak price will remain aboUt 17 percent greater than the Off-Peak price,
The PCA, or Power Cost Adjustment, of approximately 6/10 of a cent will be charged for each kWh, regardless of
the time block,
How does this cost compare to the current rate I pay tor electricity?
Current residential rates are:
. Summer - 5.1 cents for the first 300 kWh, 5,7 cents for all electricity over 300 kWh
. Non-Summer - 5,1 cents for all electricity no matter how much you use, or when you use it
. The PCA, or Power Cost Adjustment, of approximately 6/10 of a cent will be charged for each kWh
These rates will also change on June 1, 2005,
Why are the prices approximate and not tirm?
Idaho Power implements an annual rate adjustment each June, Rates can go up or down, It is based in large part
on what electricity production costs Idaho Power each year. This amount can fluctuate due to such factors as
changes in water availability for hydro generation, fluctuations in the wholesale market for electricity, fuel costs
or changes in the company s cost of doing business,
This year Idaho Power s base rates will also change slightly on June 1 because of the resolmion of some issues still
oms tanding from its general rate case in 2004,
Why should I consider joining the Time-of-Day program?
The greatest demand for electricity in southern Idaho occurs during hot summer afternoons when residential and
commercial air conditioners are used the most and the agricultural irrigation season is in full swing, The result is
an ever-growing need for power at very specific
, "
peak" times during June, July and August.
By volunteering to partner with other residential customers in ot;.r Time-of-Day program, you can help reduce
peak use when demand on the electric system is highest by shifting some of your usage from the daytime and
early evening peak hours to the nighttime and weekend off-peak hours, And much like recycling, a small
individual effort from many households can lead to powerful changes that benefit the entire community,
Withom changing their energy use, some customers' electricity bills will go down on the Time-of-Day program,
some will go up, and some will not change much at all. This program provides most custOmers an opportunity to
save a little on their electricity bill, if they change the time of day and days of the week they use the most electricity,
How can I make an informed decision about whether or not to sign up?
Visit www.idahopower.com and log in as an Account Manager, or register to become one (you ll need a copy of
your latest bill). Once you re logged in, Emmett AMR customers should check out the ENERGYsmart Energy
Usage page and the ENERGYsmart Energy Shift Calculator.
The ENERGYsmart Energy Usage page provides usage analysis tips and graphs of how much energy you used
last' summer. Check out your usage for last summer to get an idea about how much electricity you might use this
summer. Even if you don t log in as an Account Manager, you can still check out the ENERGYsmart Energy
Shift Calculator. It s designed to help you identify the general results of shifting some of your energy use to a time
of day that will be less expensive.
Bottom line, what types of customers would benefit from this program?
Customers willing and able to shift their major electricity use to Off-Peak hours may reduce their electricity bills,
Customers who currently do not use much electricity during the On-Peak or Mid-Peak periods may also benefit
from this program,
How do I sign up for the Time-of-Day program?
Residential customers in the Emmett Valley who are not already signed up for the AIC Cool Credit or Energy
Watch programs are eligible, Complete the application card and mail it to us at: Idaho Power, Time-of-Day
Program Manager, P,O, Box 70, Boise, ID, 83707,
You may also call Customer Service at 388-2323 from the Emmett Valley, or 1-800-488-6151, from elsewhere,
When prompted by our Power Assistance Line (PAL), please say "residential services " then say "programs" when
prompted again, Personal assistance is available weekdays from 7:30 a,m, to 6:30 p,m, Please note: Monday is
~ busiest day. It may be easier to reach us Tuesday through Friday,
Is there a deadline for signing up?
Yes, Eligible customers may sign up for the Time-of-Day program betWeen April 5 and May 15, 2005,
Will the program be limited to a certain number of customers?
Yes. Participation in this program will be limited to 150 households,
Residential customers in the Emmett Valley have three energy-management programs (A/C Cool
Credit, Time-of-Day and Energy Watch) they can choose from this summer. How many of these
programs can I sign up for?
In order to allow Idaho Power to independently assess each program, customers will only be able to participate in
one of these programs, Participation is voluntary,
,..~ ~.-. -------- ..--- - -.- -- - -
3_1l~
An 'DACO'P company
IIII
1111
NO POSTAGE
NECESSARY
IF MAILED
INTHE
UNITED STATES
BUSINESS REPLY MAIL
FIRST-CLASS MAIL PERMIT NO, 68 BOISE 10
POSTAGE WILL BE PAID BY ADDRESSEE
Energy Watch Program Manager
IDAHO POWER COMPANY
O. BOX 70
BOISE 10 83707-9952
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Is tomorrow an
Energy Watch Day?
Up to 10 weekdays
5 to 9 p.m. between
June 15 and August 15BCAHO FOWERt!J
An IDAce.p Company
. Did Idaho Power call or email you today?
Check at www.idahopower.com.
. Energy Watch hours means electricity is four times
more expensive than other hours. Use as little. electricity
as possible during these hours.
Is tomorrow an
Energy Watch Day?
Up to 10 weekdays
5 to 9 p.m. between
June 15 and August 15ICAHO POWER
!!)
An 'DACe.p Company
. Did Idaho Power call or email you today?
Check at www.idahopower.com.
. Energy Watch hours means electricity is four times
more expensive than other hours. Use as little electricity
as possible during these hours.
DAHO
POWER (8)
An IDACORP Company
IDAHO POWER COMPANY
O. BOX 70
BOISE, IDAHO B3707
May 19, 2005
We are pleased to inform you that you have been accepted into Idaho Power s Energy Watch
pilot program.
We appreciate your interest in participating in this program that will help reduce the demand
on our electrical system during peak times this summer, as well as allow you the opportunity
to pay less for your electricity during the majority of the summer.
As a participant in this program , you may experience up to 10 Energy Watch Days from June
15 to August 15" 2005, that will affect the rate you pay for electricity during four hours each of
those days. Idaho Power will be contacting you by telephone and e-mail (if you supplied your
e-mail address) by 4 p.m. the day prior to an Energy Watch Day. In addition , Energy Watch
notification information is available at Customer Service at www.idahopower.com.
On Energy Watch Days, between 5 and 9 p., the price you pay for electricity is expensive-
more than $0.20 per kWh , or about four times the normal rate. Outside of the Energy Watch
hours, your electricity rate will be the lowest rate avaitable to residential customers, or $0.051
per kWh*. By comparison , customers not participating in Energy Watch will pay $0.057 per
kWh* for all energy consumed over 300 kilowatt-hours. Your monthly bill will specify your
usage for these time periods and reflect these rates.
Remember that in this program you are encouraged to use as little energy as possible during
the Energy Watch hours. Some of the appliances that use the most power in your home are
the air conditioner, oven , clothes dryer, and electric water heater. To remember when it's
Energy Watch Day, we have enclosed vinyl stickers you may adhere to some of your
appliances to assist in considering whether use of the appliance could be shifted until the
Energy Watch hours are over. While we don t recommend placing a vinyl sticker on your
oven, place it nearby to remember that not only does an electric oven utilize electricity it also
warms your dwelling which can cause an increase in your air conditioner use to cool your
space. The stickers are reusable and may be removed for use on the next Energy WatchDay.
As a customer with Advanced Meter Reading (AMR), you will have access to your electric
usage data by either contacting us by phone or using your computer to utilize enhanced
E-services tools at Idaho Power s Web site. If you choose to use your computer, go to
E-services at www.idahopower.com and register as an Account Manager and you will be able
to view your recent account data as well as energy efficiency tips and tools to help you better
understand your energy usage. If you do not have Internet access , you may call Idaho Power
at 388-2323 and request a printed copy be sent to you.
Idaho Power currently has a request before the Idaho Public Utilities Commission to increase its rates by 6.3%, If
this request is approved by the Commission , your charges under the Energy Watch pilot program will increase to
$0,054 per kWh compared to $0,061 per kWh for non-participants,
Please note that if you should move from your residence this summer, we cannot extend
continuation in this program and your account would revert back to standard residential rates.
We realize this is a new program and questions may arise as the summer progresses. Please
feel free to contact us if you have any questions, requests, or need additional stickers.
You may call Customer Service at 388-2323 from the Emmett Valley, or 1-800-488-6151 , fromelsewhere. When prompted by our Power Assistance Line (PAL), please say "residentialservices" then say "programs" when prompted again. Personal assistance is available
weekdays from 7:30 a.m. to 6:30 p.
Again, thank you for participating in this summer s Energy Watch pitot program , and takingaction to help reduce demand on the electrical system during peak usage times.
Sincerely
Pete Pengilly
Program Manager
Energy Watch
Frequently Asked Questions
What is Energy Watch?
Energy Watch is a voluntary program where residential customers who have AMR (Advanced Meter Reading) in
the Emmett Valley would be charged the lowestresidential rate during all times of day, for the entire summer,
except for the four-hour Energy Watch time blocks on 10 days between June 15 and August 15, 2005, Although
Energy \Vatch hours span only a few months, the Energy Watch program will remain in effect until April 1, 2006,
The current residential summer rate is 5,1 cents per kWh for the first 300 kWh you use and 5,7 cents for all kWh
over 300 kWh used. Under this example, you would be charged 5,1 cents per kWh for all usage outside the
Energy Watch hours, In addition, the PCA (Power Cost Adjustment) of approximately 6/lD of a cent also is charged
for each kWh.
A kWh is the unit Idaho Power uses to measure your electricity usage each month, One kilowatt-hour is 1,000
watts of electricity used for one hour. For example, if you operate a 1 000-watt microwave for one hour, or if you
operate a 1O0-watt light bulb for 10 hours, each will use one kilowatt-hour of electricity.
How would the Energy Watch program work?
Under the Energy Watch program you would be charged the lower rate of 5.1 cents per kWh, except during Energy
Watch hours. During those 10 days, for four hours per day between 5 and 9 p.m" the price will be expensive-
more than 20 cents per kWh, or about four times the normal rate. Customers will be notified by telephone and/or
e-mail the day prior to Energy Watch being activated, During the Energy Watch hours, customers will be
encouraged to use as little energy as possible,
Why should I consider joining Energy Watch?
The greatest demand for electricity in southern Idaho occurs during hot summer afternoons when air
conditioners are used the most and Idaho s farmers are pumping water to their fields. The result is an ever-
growing need for power at very specific, "peak" times during June, July and August,
By volunteering to partner with other residential customers in our Energy Watch program, you can help reduce
peak electricity use when demand on the company s system is highest, And much like recycling, a small
individual effort from many households can lead to powerful changes that benefit the entire community.
You may save money by being on the Energy Watch program, It depends on when you use electricity and how
willing you are to reduce your usage during a few hours of the summer. However, if you sign up for the program
but don't change your usage patterns, your electricity bill will probably go up,
Customers willing to curtail their energy use significantly during the 10, four-hour time blocks may reduce their
electricity bills, For example, shift workers who aren t home during those hours, or customers who have low
energy usage between 5 and 9 p,m" also may benefit from the program,
Here are some additional ideas for reducing your energy use on the Energy Watch program: make sure your
house cools overnight and then, first thing in the morning while it is still cool outside, close all windows and
window coverings, During the 5 to 9 p,m. time frame, if you are able to get out of the house and go someplace
cool, like swimming, or to the movies, that would be great. You also could turn off your electric water heater
during those hours, prepare the evening meal on a barbecue, turn off all televisions, raise the temperature on the
air conditioner, and not run the dishwasher, clothes washer or clothes dryer to reduce energy use,
How can I make an informed decision about whether or not to sign up?
Visit www.idahopower.com and log in as an Account Manager, or register to become one (you ll need a copy of
your latest bill).
Once youre logged in, Emmett Valley AMR customers check out the "ENERGY smart Energy Usage" link and
the ENERGYsmart Energy Shift Calculator. You ll find usage analysis tips and graphs of how much energy you
used last summer on the ENERGYsmart Energy Usage page, You ll be able to see your energy usage from last
summer to get an idea about how much electricity you might use this summer.
You don t have to be an Account Manager to check out the ENERGYsmart Energy Shift Calculator. It's designed
to help you identify the results of shifting some of your energy use to a lower-cost time,
How do i sign up for Energy Watch?
Residential customers in the Emmett Valley who are not already signed up for the Time-oE-Day or AIC Cool
Credit programs are eligible. Between April 5 and May 15, 2005, complete the application card and mail it to us
at: Idaho Power, Energy Watch Program Manager, P.O, Box 70, Boise, ID, 83707,
You may also call Customer Service at 388-2323 from the Emmett Valley, or 1-800-488-6151, from ,elsewhere.
When prompted by our Power Assistance Line (PAL), please say "residential services," then say "programs" when
prompted again. Personal assistance is available weekdays from 7:30 a.m, to 6:30 p.m. Please note: Monday is
OUf busiest day. It may be easier to reach us Tuesday through Friday.
Is there a deadline for signing up?
Yes, Eligible customers may sign up for the Energy Watch program between April 5 and May 15, 2005.
Will the program be limited to a certain number of customers?
Yes, Participation in this program will be limited to 150 households.
Residential customers in the Emmett Valley have three energy management programs (A/C Cool
Credit, Time-of-Day and Energy Watch) they can choose from this summer. How many of these
programs can I sign up for?
In order to allow Idaho Power to independently assess each program, customers will only be able to participate in
one of these programs, Participation is voluntary.
IDAHO
POWER (8)
IDAHO POWER COMPANY
O, BOX 70
BOISE, IDAHO 83707
An IDACORP Company
April 5, 2005
Dear Emmett Valley Cusmmer:
We are pleased to offer you options this summer that may reduce your power bill and help us reduce demand on
Idaho Power s electrical system during the peak summer months, Because you live in the Emmett area, you are a
member of a select group of our custOmers uniquely qualified to be among the first to try these innovative,
voluntary programs.
Last year, Idaho Power changed OUt the electric meters in your community and installed new automated meters
as part of the Advanced Meter Reading (AMR) program, AMR technology allows us to collecr customers' energy
usage information on an hourly basis by shipping data over power lines. One of the intended benefits of AMR is
to improve customer service by giving you the ability to participate in pricing and demand-side management
programs designed to help you reduce energy usage or shifr the times when you use the largest amounts of electricity,
The Emmett area was chosen to launch these programs due to the community s unique characteristics that will
provide us an opportunity to evaluate the capabilities of AMR under different geographic and climatic conditions,
Now that the AMR technology is in place, you have pricing options available this summer,
The enclosed brochures describe three offerings:
AIC Cool Credit. This program pays you $7 per month during the summer to allow Idaho Power to
cycle your air conditioning unit on and off for 15-minute intervals under certain conditions,
. Energy Watch. Idaho Power offers you the lowest, standard residential rate for electricity all summer,
with the exception of ten, four-hour blocks, We will notify you when energy rates will be considerably
higher so you can plan to reduce your energy use during these scheduled Energy Watch hours,
. Time-of-Day. This program encourages you to conserve your energy use during the warm, daytime
hours by encouraging you to shift your usage to later in the day when you will pay a lower rate,
Please note that you may participate in only one of the three programs,
Each program offers you the opportunity to participate in shifting energy consumption during peak usage times
this summer, This is important because during the summer most customers have a need for electricity during the
same time frame, In order to deliver the needed electricity, Idaho Power is taking steps to ensure power is there
for everyone, Idaho Power is examining ways customers can benefit, while at the same time encouraging usage
during off-peak times,
We encourage you ~o take a close look at the enclosed information designed to help you make the choice that is
right for you, Keep in mind that you do have the choice of not participating in any of the programs, We hope,
however, that you will take part in one of these important programs,
Regards,
fdd
Celeste Becia
AIC Cool Credit Program Manager
Pete Pengilly
Energy Watch and Time-of-Day Program Manager
Final Report
Time-of-Day and Energy Watch Pilot Programs
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March 29 2006
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Idaho Power Emmett Study
Final Report
November 2005
CONTACT:
Michele Coleman
225 North 9th Street, Suite 200
Boise, Idaho 83702
P. [phone]
F. [phone]
mcoleman~wrg.com
SUBMITTED BY:
)i NORTHWEST
RESEARCHGROUP
Summary
Project Overview
In April and May of 2005, Idaho Power offered Emmett area customers the opportunity to
participate in one of three programs during the summer of2005. For this study, Idaho
Power focused on two of the three programs - Time-of-Day and Energy Watch. These
pricing programs provided customers the opportunity to reduce their electric bills by
shifting their usage off of hours when the cost to provide energy is the highest onto hours
of the day for which the cost to provide energy is lower.
In September 2005 , Idaho Power contracted with Northwest Research Group, Inc. to
conduct a survey to determine the awareness and perceptions of Idaho Power s service
since installing the new metering technology and to gain awareness and perceptions of the
two recent pricing programs. A telephone survey of 400 general Advanced Meter Reading
(AMR) customers that did not participate in the pricing programs and 160 program
participants was administered to Idaho Power s Emmett area customers. Surveys were
completed with 406 non-participants and 127 program participants (66 Time-of-Day and
61 Energy Watch participants).
The overall objectives of this study are to help Idaho Power understand the perceptions of
AMR customers with regard to service and ability to gather relevant energy usage
information and to measure customers' perceptions and awareness of the two pricing
programs offered in the summer of 2005. It will also help gain an understanding of
whether or not these customers would like to participate in similar future programs.
Key Findings
Characteristics of Program Participants and Non-Participants
There were few demographic or household characteristics that differentiated program
participants from non-participants. This would suggest that the simplicity of the two
programs had universal appeal.
Program participants are more likely than non-participants to live in a single-family home
- 88 percent compared with 78 percent, respectively.
Table 1: Characteristics of Program Participants and Non-Participants
All Respondents Participants Non-Participants
(n = 533)(n = 127) (n = 406)
Single-family home 81%88%78%
Multi-family home
(duplex, triplex, apartment)
Manufactured mobile home 16%11%17%
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. ii
General Attitudes toward Idaho Power
Overall Satisfaction
All survey respondents were asked if they are satisfied or dissatisfied with the level of
service they receive from Idaho Power. Responses were recorded on a 5-point satisfaction
scale where "I" means "very dissatisfied" and "5" means "very satisfied.
Overall, Emmett area residents are satisfied with the level of service they receive from
Idaho Power - 61 percent are very satisfied and 33 percent are somewhat satisfied.
Emmett area residents electing to participate in the pricing programs are more positive
toward Idaho Power than are non-participants - 71 percent compared to 57 percent of
very satisfied " respectively.
Table 2: Overall Level of Satisfaction by Participants and Non-Participants
Total Participantslevel of Satisfaction (n=533) (n=127)Very Satisfied 61% 71%
Somewhat Satisfied 33% 27%Neutral 2% 1 %Dissatisfied 5%
Mean 4.47 4.
Mean is based on point scale where 1" means "very dissatisfied" and 5" means "very satisfied,
Non-Participants
(n=406)
57%
35%
4.41
Satisfaction with Idaho Power within the Past Twelve Months
In addition to collecting Emmett customers' overall satisfaction levels, respondents were
asked if their level of satisfaction with Idaho Power has become stronger, weaker, or
stayed the same over the past 12 months. Responses were recorded on a 5-point scale
where "I" means "much weaker" and "5" means "much stronger.
While the majority (84%) of all respondents say there has been no change in their
satisfaction with Idaho Power within the past 12 months, program participants are more
likely than non-participants to suggest their satisfaction levels have increased - 15
percent (7% somewhat stronger + 8% much stronger) compared with 8 percent (4%
somewhat stronger + 4% much stronger), respectively.
Table 3: Level of Satisfaction within the Past Twelve Months by Participants and Non-Participants
Total Participants Non-participants
level of Satisfaction (n=533)(n=127)(n=406)
Much Stronger
Somewhat Stronger
Stayed the Same 84%79%85%
Somewhat Weaker
Much Weaker
Mean
*Mean is based on a 5-point scale where 1" means "much weaker" and 5" means "much stronger,
Page. III
Satisfaction with How Well Idaho Power Provides Information
Finally, respondents were asked to indicate the extent to which they agreed or disagreed
with three statements about how well Idaho Power provides information to its customers.
Responses were recorded on a 5-point scale where "I" means "strongly disagree" and "
means "strongly agree.
Overall, Emmett residents agree that Idaho Power does a good job keeping customers
informed. Consistent with the overall satisfaction scores, program participants are more
likely than non-participants to feel that Idaho Power does a good job keeping customers
informed. Notably, program participants are more likely than non-participants to agree
that Idaho Power does a good job of providing information to help them make decisions
about the best time to use electricity. There were a few differences between the Energy
Watch and Time-of-Day participants , but Time-of-Day participants were slightly more
inclined to say that Idaho Power provided information to make decisions on the best time
to use electricity.
Table 4: Level of Satisfaction of How Well Idaho Power Provides Information to its Customers
All Total Energy Non-
Respondents Participants Time-of-Day Watch Participants
(n = 533)(n=127)(n=66)(n=61)(n = 406)
Overall
Provided information to
make decisions about the
best time to use
electricity
Provided information to
make decisions on the
best time to use
electricity efficiently
Kept you informed about
changes that could affect
your account
Mean based on point scale where 1" means "strongly disagree" and 5" means "strongly agree,
Awareness of New AMR Meter
Respondents were asked a series of questions to measure their awareness of the new
Advanced Meter Reading (AMR) system. Responses were recorded on an II-point scale
where "0" means "not at all aware" and "10" means "very aware.
Emmett residents are moderately aware of the new Advanced Meter Reading or AMR
program - overall mean of 6.57 on an II-point scale where "10" means "very aware" and
5" represents the mid-point. Residents are most aware that a new meter has been
installed. They are least aware that they can get their household's hourly and daily
electricity usage information on Idaho Power s website.
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. iv
Program participants are more aware of the unique benefits of the new meter than are
non-participants. Of the two programs, the Energy Watch participants are the most
aware of the unique benefits. Notably, program participants are more aware of the ability
to get their household's electricity usage information by visiting the utility s website.
Table 5: Awareness of the New AMR Meter
All Respondents Total Participants Time-of-Day Energy Watch Non-Participants
(n = 533)(n = 127) (n=66)(n=61)(n = 406)
Overall Awareness 7.44
Installed a new
AMR meter on your
residence in the
past 18 months
No longer have a
meter reader
coming on to your
property on a
monthly basis
AMR meter is read
remotely
Ability to get hourly
and daily electricity
usage information
on Idaho Power
website
Mean based on an 11-point scale where "0" means "not at all aware" and "10" means "vel)f aware,
Non-Partici pants
Awareness of Time-at-Day and Energy Watch Programs
Respondents who did not participate in the programs were asked if they were aware that
two pricing programs were available to Emmett area residents this past summer. Fifty-
five percent (55%) of respondents were aware of these programs.
Customers who were aware of the two programs (n=221) were asked how they first
learned about the Time-of-Day and Energy Watch programs that Idaho Power offered to
Emmett area residents. The majority of the respondents first learned about the programs
through a mailing from Idaho Power (64%) and a message on their Idaho Power bill (30%).
Page. y
In addition, non-participants who are aware of the two programs (n=221) were asked if
they had received enough information from Idaho Power to help make the decision about
whether or not to participate in the Time-of-Day or Energy Watch programs. Responses
were recorded on a 5-point scale where "I" means "strongly disagree" and "5" means
strongly agree." Over four out offive (83%) non-participants agreed that they received
enough information about these programs.
Figure 1: Non-participants: Agreement on Receiving Enough Information about the Two Pricing
Programs
Disagree
17%
Strongly
Agree
44%
Somewhat
Agree
39%
Reasons tor Not Participating in the Time-ot-Day or Energy Watch Programs
To determine why Emmett area customers did not participate in the two pricing
programs, residents were asked to provide the main reason why they chose not to
participate. The reasons cited most often included: not convenient (16%), lifestyle doesn
allow shifting of electricity use (15%), not believing it would save electricity (10%), and
feeling it would not fit their schedule (9%).
Figure 2: Non-Participants: Reasons for Not Participating in One of the Two Pricing Programs
Not convenient 16%
Life style doesn t allow shifting use
Wouldn t save electricity
15%
10%
Doesn t fit our schedule
Didn t want to change when I use electricity
Not enough information
Not enough incentive
Wouldn t save money
Have kids at home -% of Non-Participants
Didn t want to pay more
Other 23%
10%15%20%25%
Responses in the other category were reviewed and as appropriate coded into an existing or new category, Several
respondents to this question provided answers that indicated there was uncertainty about eligibility for participation in the
programs and whether the programs would offer benefits to them,
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. vi
Participants
Information Sources
Emmett area customers who participated in the Time-of-Day or Energy Watch programs
were asked how they first learned about the two programs. Like non-participants
program participants were most likely to hear about the programs through a mailing from
Idaho Power (65%) and a message on their Idaho Power bill (25%).
Relatively few (16% overall) participants used their hourly electricity usage information to
make their decision about participating in the programs.
Overall, program participants agree that they received enough information about the
programs. They were most likely to agree that they received adequate information before
and during the program. However, residents would have liked to have more information
from Idaho Power at the completion of the program , especially participants in the Energy
Watch program.
Lifestyle Changes
Participants were asked if their participation in the Time-of-Day or Energy Watch
program affected their lifestyle in anyway. Overall, fifty-three percent (53%) of program
participants feel that their lifestyle had not changed. Participants in the Energy Watch
program indicated that their lifestyle changed more than those customers who
participated in the Time-of-Day program (56 percent versus 39 percent, respectively).
Figure 3: Overall Lifestyle Changes by Participating in One of the Two Pricing Programs
70%61%
10%
60%
50%
40%
30%
20%
Total (n=127)Time of Day
(n=66)
Energy Watch
(n=61 )
8%YeS 8%No
Page. vII
As a follow-up for those program participants (n=60) who said their lifestyle had changed
where asked how dramatically was their lifestyle changed by participating in one of theseprograms. For those participants who proclaimed that their lifestyle had changed, 53
percent feel their lifestyle had somewhat changed and only 22 percent feel their lifestyle
had changed significantly.
Figure 4: How Dramatically Participants Lifestyles Had Changed
Not at all Very little
22%
Significantly
22%
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. viii
Of those customers who said their lifestyle had changed as a result of participating in one
of these programs, 24 percent of the Energy Watch participants said their lifestyle
changed significantly and 56 percent said their lifestyle had changed somewhat. Nineteen
percent (19%) of Time-of-Day participants said that their lifestyle changed significantly
with another 50 percent saying their lifestyle had changed somewhat. It is important to
note that the cell sizes of those responding to this question is relatively small (n=26 for
Time-of-Day and n=34 for Energy Watch participants). Care , therefore should be used in
interpreting these results.
Figure 5: How Dramatically Participants Lifestyles Had Changed by Type of Participant
60%56%
10%
50%
40%
30%
20%
Time-of-Day (n=26)Energy Watch (n=34)
. Not at all 0 Very little. Somewhat. Significantly
As a follow-up to asking about lifestyle changes, residents who felt their lifestyles had
changed were asked what the most significant change in their lifestyle was in order to
reduce their electricity usage. Overall, program participants indicated that laundry (26%)
and household temperature / comfort (26%) were the most significant changes in their
lifestyle.
Time-of-Day participants are more likely to indicate that the most significant change
their household lifestyle was laundry (60%). Energy Watch program participants are
more likely to indicate that household temperature / comfort was the most significant
change to their household lifestyle (36%). Again, because of the small cell sizes of those
responding to this question (n=26 for Time-of-Day and n=34 for Energy Watch
participants) care should be used in interpreting these results.
Page.
Changes in the Electricity Bill
In addition to lifestyle changes, program participants (n=127) were asked if their
electricity bill changed as a result of participating in one of the two pricing programs.
Most Energy Watch program participants felt their bill had decreased (41%) or stayed the
same (49%). Time-of-Day participants also felt their bill decreased (47%), but 24 percent
of them felt their bill had increased and 29 percent felt it stayed the same.
Figure 6: Changes in the Electricity Bill by Type of Participant
60%
10%
47%49%
50%
40%
30%
20%
Total
Participants
(n=127)
Time of Day
Participants
(n=66)
Energy Watch
Particpants
(n=61)
. Decreased. Stayed the same 0 Increased
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. x
Likelihood of Participating in Time-of-Day and/or Energy Watch Programs in the Future
Emmett area customers who participated in one of the two pricing programs were asked
how likely they would be to participate in the Time-of-Day or Energy Watch Programs if
Idaho Power offered them again. Responses were recorded on a 5-point scale where "
means "very unlikely" and "5" means "very likely.
Overall, Emmett residents who participated in the programs would be likely to participate
in the programs in the future - 22 percent are "somewhat likely" and 60 percent are "very
likely" with little difference between Energy Watch and Time-of-Day participants.
Participants who felt their electricity bill decreased are more likely to participate in these
programs in the future compared to those who felt their bill stayed the same or increased
- overall mean rating of 4.64.
Table 6: Likelihood of Participating in One of the Two Pricing Programs in the Future by Reported
Change in Bill
Reported Change in Bill
Likelihood of Total Decreased Stayed the Same Increased
Future Participation (n=127)(n=47)(n=41)(n=19)
Very Likely 60%79%48%32%
Somewhat Likely 22%15%33%21%
Neither Likely Nor Unlikely
Somewhat Unlikely 10%26%
Very Unlikely 13%16%
Mean
Mean based on a 5-point scale where 1" means "very unlikely" and 5" means "very likely,
Page. xl
Participants were also asked how likely they were to recommend the Time-of-Day and
Energy Watch programs to their friends and family if the programs were offered again.
Responses were recorded on the same 5-point scale where "I" means "very unlikely" and
5" means "very likely.
Customers who participated in one of the pricing programs in the summer of 2005, in
general, are likely to recommend these programs to their friends and family, but there
were some differences depending on which of the two programs the customer participatedin. Although not significant, a slightly higher percentage of customers who participated in
the Energy Watch program were inclined to recommend the program than those who
participated in the Time-of-Day program - 79 percent versus 74 percent, respectively. The
most notable difference though was with the percentage of customers who said they
definitely would not recommend the Time-of-Day program (20%) versus those who would
not recommend the Energy Watch program (8%). In addition, customers who participated
in either of the pricing programs are more likely to recommend the pricing programs if
they felt their electricity bill had decreased because of participating in the programs.
Table 7: Likelihood of Recommending One of the Pricing Programs by Type of Participant
Likelihood ot Total Participants Time-ot-Day Energy Watch
Recommending (n=127)(n=66)(n=61)
Very Likely 50%46%54%
Somewhat Likely 26%28%25%
Neither Likely Nor Unlikely
Somewhat Unlikely 11%
Very Unlikely 14%20%
Mean
Mean based on point scale where 1" means "very unlikely" and 5" means "very likely,
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. xii
Study Conclusions
Overall, Emmett area customers (both non-participants and program participants) are
satisfied with the level of service they receive from Idaho Power. In addition, Emmett
customers' satisfaction level has stayed constant within the past twelve (12) months.
The most effective means to provide customers with information about new programs and
services is by direct mail and/or information provided with the bill.
The majority of non-participants was aware of the Time-of-Day and Energy Watch
programs and agreed that Idaho Power gave them enough information about these two
programs. However, non-participants did not want to participate in these programs
because they did not feel the programs were convenient or would save enough electricity.
In addition, they did not want to change when they use electricity and they felt there was
not enough incentive to participate. Idaho Power may wish to conduct additional research
to understand what types of programs would be perceived as convenient and would incent
people to participate.
As for the Emmett customers who participated in one of these programs, they were
satisfied with the programs and would participate in the programs again if they were
offered to them. Participants also agreed that they would recommend the Time-of-Day
and Energy Watch programs to their family and friends especially if they felt their
electricity bill decreased. Past program participants represent a significant opportunity
for boosting future participation by having them serve as advocates and/or providing them
with an incentive to get a friend or neighbor to participate.
In order for Idaho Power to acquire more customers interested in these types of programs
Idaho Power will need to show the non-participants the benefits of participating in Time-
of-Day and Energy Watch programs. One of the main reasons why the non-participants do
not want to be a part of these programs is because they think they will lose control over
when they can use their electricity. Based upon the verbatim responses from this study,
there seemed to be confusion for a number of customers who elected not to participate in
either the Time-of-Day or Energy Watch programs with the direct load control program
that was offered by Idaho Power during the same time period. In the course of the survey,
it was stated very explicitly that the questions were being asked about the Time-of-Day
and Energy Watch programs and not the AC Cool Credit program. Despite this, a number
of customers still commented on either not having air conditioning or using swamp coolers
so thinking they were ineligible to participate in either of these programs. A number of
customers also cited being gone for the summer as the reason for not participating. If the
program ran beyond one season, Idaho Power may see more participation.
Page. xIII
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Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. xiv
Table of Contents
Summary .............................................................................................................................................
Project Overview... ................. ....................................................................................... .... .............. ii
Key Findings.................................................................................................................................... ii
Characteristics of Program Participants and Non-Participants..................... ................... ........ ii
General Attitudes toward Idaho Power .....................................................................................iii
Awareness of New AMR Meter .................................................................................................. iv
Non-Participants... ................................................... ........................................ ............................ v
Participants........... ..................................................................................................................... vii
Study Conclusions. ..........................
............................. ........................................... ..........
........... xiii
Table of Contents............. ............................................................. ......................... ... ........................ xv
Study Background & Objectives......................................................................................................... 1
Major Findings....... .............
........................................................... ....... ........................
......... ............. 2
Characteristics of Program Participants and Non-Participants ...................................................
Impression of Idaho Power... ........................... .............................. .................................................. 2
Overall Impression.......... .........
............ ......................... ........................... ........ ..............
........ ...... 2
Change in Satisfaction with Idaho Power within the Past Twelve Months.............................. 4
Satisfaction with How Well Idaho Power Provides Information ............................................... 6
Awareness of New AMR Meter ................................................................................................... 7
Interest in Knowing Household Electricity Usage .....................................................................
Use of Idaho Power s Web site for Electricity Usage Information.............................................. 8
Non-Participants..... ................. ................................................. ......... .............................. ............. 12
Awareness of Time-of-Day and Energy Watch Programs ........................................................
Reasons for Not Participating in Time-of-Day or Energy Watch Programs ........................... 14
Participants
......... ...................
.......................................................................................... ............. 16
Information Sources...................................................................................................................
Lifestyle Changes....................................................................................................................... 18
Changes in the Electricity Bill..................................................................................................
Likelihood to Participate in Time-of-Day and/or Energy Watch Programs in the Future .....
Suggestions to Improving the Time-of-Day and/or Energy Watch Programs .........................
Study Conclusions... ....
................ ........
.............................................................................................. 29
Methodology ........................................................................ ............ .................................................. 30
Questionnaire Design....................................................................................................................
Sampling................................... ............................................... .... .................................................. 30
Final Interviewing Outcomes ....................................................................................................
Appendix............................................................................................................................................
Questionnaire.............................................................................................................................
Page. xv
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Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. xvi
Study Backg rou nd & Objectives
In April and May of 2005 , Idaho Power offered Emmett area customers the opportunity
to participate in one of three programs during the summer of 2005. For this study,
Idaho Power focused on two of the three programs - Time-of- Day and Energy Watch.
These pricing programs provided customers the opportunity to reduce their electric bills
by shifting their usage off of hours when the cost to provide energy is the highest onto
hours of the day for which the cost to provide energy is lower.
In September 2005, Idaho Power contracted with Northwest Research Group, Inc. to
conduct a survey to determine the awareness and perceptions of Idaho Power s service
since installing new metering technology and to also gain awareness and perceptions of
the two recent pricing programs. A telephone survey of 400 general advanced meter
reading (AMR) customers that did not participate in the pricing programs and 160
program participants was administered to Idaho Power s Emmett area customers. The
results of the study are 406 non-participants and 127 program participants (66 Time-of-
Day and 61 Energy Watch participants).
This study is to help Idaho Power understand the perceptions of AMR customers with
regard to service and ability to gather relevant energy usage information and to
' measure customers ' perceptions and awareness of the two pricing programs offered in
the summer of 2005. It will also help gain an understanding of whether or not these
customers would like to participate in a program such as these in the future.
This report begins with a discussion of the study major findings focusing on
awareness and perceptions. Study conclusions are then presented. The report ends
with a detailed description about the study methodology and an appendix with
detailed information and a copy of the questionnaire. Complete tabulations of all of the
data, broken down by key respondent characteristics, are published under a separate
cover.
Page. 1
Major Findings
Characteristics of Program Participants and Non-Participants
There were few demographic or household characteristics that differentiated program
participants from non-participants. This would suggest that the simplicity of the two
programs had universal appeal.
Program participants are more likely than non-participants to live in a single-family
home.
Table 8: Characteristics of Program Participants and Non-Participants
All Respondents
(n = 533)
Participants
(n=127)
Non-Participants
(n = 406)
Single-family home
Multi-family home
(duplex, triplex, apartment)
81%88%78%
Manufactured mobile home 16%11%17%
Impression of Idaho Power
Overall Impression
All survey respondents were asked if they are satisfied or dissatisfied with the level of
service they receive from Idaho Power. Responses were recorded on a 5-point
satisfaction scale where "1" means "very dissatisfied" and "5" means "very satisfied.
Overall, Emmett area residents are satisfied with the level of service they receive from
Idaho Power - 61 percent are very satisfied and 33 percent are somewhat satisfied.
Emmett area residents electing to participate in the pricing programs are more positive
toward Idaho Power than are non-participants - overall mean rating of 4.67 versus
4.41 , respectively.
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 2
Table 9: Overall Level of Satisfaction by Participants and Non-Participants
All Respondents Participants Non-Participants
level of Satisfaction (n = 533)(n=127)(n = 406)
Very Satisfied 61%71%57%
Somewhat Satisfied 33%27%35%
Neither Satisfied nor
Dissatisfied
Dissatisfied
Mean 4.47 4.41
*Mean is based on a 5-point scale where 1" means "very dissatisfied" and 5" means "very satisfied,
Non-Partici pants
For non-participants (n=406), nearly three out of five (57%) respondents are very
satisfied with the level of service they receive from Idaho Power. The level of
satisfaction also stays consistent by the length of time as an Idaho Power customer.
Table 10: Non-Participants: Level of Satisfaction by Length of Time as an Idaho Power Customer
Length Of Time As An Idaho Power Customer
less than 1 to 10 11 to 25 26 Years or
Total 1 year Years Years More
(n = 406)(n = 3)(n = 87)(n=108)(n = 203)
Very Satisfied 57%33%55%60%58%
Somewhat 35%67%36%34%34%
Satisfied
Neutral
Dissatisfied
Mean 4.41 4.48 4.41
Mean is based on point scale where 1" means "very dissatisfied" and 5" means "very satisfied,
Page. 3
Program Participants
As noted, program participants (n=127) are more satisfied than non-participants with
the level of service. More than seven out often (71%) program participants are very
satisfied, giving the company an overall mean rating of 4.67. This may suggest that
attitudes toward Idaho Power may be a significant factor in customers' decisions to
participate in energy programs.
There is a relationship between length of residence and satisfaction among program
participants, with program participants living in the area fewer (10 or less) years being
more satisfied than long-time residents.
Table 11: Participants: Level of Satisfaction by Length of Time as an Idaho Power Customer
Length Of Time As An Idaho Power Customer
Less than 1 to 10 11 to 25 26 Years or
Total 1 year Years Years More
(n=127)(n = 1)(n = 34)(n = 26)(n = 66)
Very Satisfied 71%100%85%69%64%
Somewhat 27%15%27%33%
Satisfied
Neutral
Dissatisfied
Mean
Mean is based on point scale where 1" means "very dissatisfied" and 5" means "very satisfied,
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 4
Change in Satisfaction with Idaho Power within the Past Twelve Months
In addition to collecting Emmett area customers' overall satisfaction levels , respondents
were asked if their level of satisfaction with Idaho Power has become stronger, weaker
or stayed the same over the past 12 months. Responses were recorded on a 5-point
scale where "I" means "much weaker" and "5" means "much stronger.
The majority (84%) of all respondents said there has been no change in their level
satisfaction with Idaho Power within the past 12 months.
Emmett customers who did not participate in the pricing programs are more likely
say that their satisfaction with Idaho Power has stayed the same within the past year.
In fact, there are only 8 percent of non-participants who say that their satisfaction with
Idaho Power has become stronger.
While the majority (79%) of program participants also say there has been no change in
their satisfaction they are more likely than non-participants to say their level of
satisfaction has increased - 15 percent say it is stronger (8% much stronger +
stronger).
Table 12: Level of Satisfaction within the Past Twelve Months by Participants and Non-
Participants
All Respondents Participants Non-Participants
level of Satisfaction (n = 533)(n = 127) (n = 406)
Much Stronger
Somewhat Stronger
Stayed the Same 84%79%85%
Somewhat Weaker
Much Weaker
Mean
*Mean is based on a 5-point scale where 1" means "much weaker" and 5" means "much stronger,
Page. 5
Satisfaction with How Well Idaho Power Provides Information
Emmett customers were asked to indicate the degree to which they agree or disagree
with a series of statements with regard to how well Idaho Power provides information
to its customers. Statements included: informed customers about changes that may
affect their accounts , provided information to help make decisions on how to use
electricity efficiently, and provided information to help make decisions about the best
time to use electricity. Responses were recorded on a 5-point scale where "I" means
strongly disagree" and "5" means "strongly agree.
Overall, Emmett residents agree that Idaho Power does a good job keeping customers
informed.
Consistent with the overall satisfaction scores , program participants are more likely
than non-participants to feel that Idaho Power does a good job keeping customers
informed.
Notably, program participants are more likely than non-participants to agree that
Idaho Power does a good job of providing information to help them make decisions about
the best time to use electricity. More than three out of four (78%) program participants
strongly agree with this statement compared to just over half (52%) of program non-
participants. The participants in the Time-of-Day program responded slightly more
favorably than the Energy Watch participants - 80 percent "strongly agree" versus 75
percent "strongly agree.
Program participants are also more likely than non-participants to feel the utility does
a good job of keeping them informed about changes that could affect their account - 69
percent of participants strongly agree with this statement compared to 51 percent of
non-participants.
Table 13: Level of Satisfaction of How Well Idaho Power Provides Information to its Customers
All Total Energy Non-
Respondents Participants Time-of-Day Watch Participants
(n = 533)(n=127)(n=66)(n=61)(n = 406)
Overall
Provided information to
make decisions about the
best time to use
electricity
Provided information to
make decisions on the
best time to use
electricity efficiently
Kept you informed about
changes that could affect
your account
Mean based on point scale where 1" means "strongly disagree" and 5" means "strongly agree,
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 6
Awareness of New AMR Meter
Respondents were asked a series of statements to measure their overall awareness of
their new Advanced Meter Reading, or AMR meter. Respondents were asked if they are
aware that Idaho Power installed a new AMR meter in the past 18 months, their AMR
meter is read remotely, they no longer have a meter reader coming on to their property
on a monthly basis , and they have the ability to get their hourly and daily electricity
usage information from Idaho Power s website. Responses were recorded on an II-point
scale where "0" means "not at all aware" and "10" means "very aware.
Emmett residents are moderately aware of the new AMR program - overall mean of
57 on an II-point scale where "10" means "very aware" and "5" represents the mid-
point.
Residents are most aware that a new meter has been installed. There is no significant
difference in awareness of this fact between participants and non-participants - 69
percent of program participants are very aware that the new meter has been installed
compared with 64 percent of non-participants. There were also no significant
differences between participants of the Time-of-Day and Energy Watch programs - 70
percent of Energy Watch participants are "very aware" and 68 percent of Time-of-Day
participants are "very aware.
Of the items queried, Emmett residents are least aware that they can get their
household's hourly and daily electricity usage information on Idaho Power s website.
Program participants are more aware of the unique benefits of the new meter than are
non-participants. Notably, they are more aware of the ability to get their household'
electricity usage information by visiting the utility s website (Time-of-Day 40 percent
Energy Watch 39 percent, and non-participants 20 percent "very aware ). This may be
due to their level of involvement with the recent pricing programs offered by Idaho
Power.
Table 14: Awareness of the New AMR Meter
Overall Awareness
Installed a new AMR
meter on your
residence in the past
18 months
No longer have a
meter reader coming
on to your property
on a monthly basis
AMR meter is read
remotely
Ability to get hourly
and daily electricity
usage information
on Idaho Power
website
Mean based on an 11-point scale where "0" means "not at all aware" and "10" means "very aware,
All Respondents
(n = 533)
Total Participants
(n = 127)
Time-of-Day
(n=66)
7.44
Energy Watch
(n=61 )
Non-Participants
(n = 406)
Page. 7
Interest in Knowing Household Electricity Usage
Respondents were asked their need for or interest in knowing their household's hourly
or daily electricity usage.
More than two out offive (43%) Emmett residents suggest they are interested
knowing their daily usage. While somewhat more participants than non-participants
suggest they would like to know their daily usage, this difference is not statistically
significant. Time-of-Day participants indicated a slightly stronger interest in getting
daily electricity usage (52%) than those who participated in the Energy Watch program
(47%).
Somewhat fewer (37%) Emmett residents want to know their hourly usage. However
more program participants are interested in this information than are non-participants
- 47 percent compared with 33 percent, respectively. In addition, slightly more Energy
Watch participants want this information (52%) compared to Time-of-Day participants
(42%).
Table 15: Interest in Knowing Household Electricity Usage
% Interested in Knowing
Daily Usage
Hourly Usage
Total
All Respondents Participants Time-of-Day Energy Watch*Non-Participants
(n = 533)(n=127)(n=66)(n=61)(n = 406)
43%50%52%47%40%
37%47%42%52%33%
* Caution: Because of small sample sizes, care should be used when interpreting these results
Use of Idaho Power s Website for Electricity Usage Information
Emmett residents were asked if they have ever gone to Idaho Power s website for their
electricity usage information.
Fewer than one out often (9%) Emmett residents have ever gone to Idaho Power
website for electricity usage information. Not surprisingly, younger residents (those
between 25 and 64 years of age) are more likely than those over 65 to have used the
web site to obtain information - 39 percent of those between 25 and 64 have gone to
Idaho Power s web site to obtain information about their energy consumption compared
to just 7 percent of those 65 and older.
Program participants are nearly four times as likely as non-participants to have visited
Idaho Power s website for electricity usage information - 19 percent compared to 5
percent, respectively. In addition, 26 percent of participants in the Energy Watch
program are more likely to have visited Idaho Power s website compared to the Time-of-
Day participants.
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 8
Table 16: Use of Idaho Power s Website for Electricity Usage Information
Used Idaho Power
Website for Electricity
Usage Information
Did Not Use Idaho Power
Website for Electricity
Usage Information
Total Energy Non-
All Respondents Participants Time-of-Day Watch*Participants
(n = 533)(n = 127) (n=66)(n=61)(n = 406)
19%12%26%
91%81%88%74%95%
* Caution: Because of small sample sizes, care should be used when interpreting these results
Respondents were then asked how useful the electricity usage information they
obtained on the website was. Responses were recorded on a 5-point scale where "
means "very not useful" and "5" means "very useful." Note that the cell sizes of those
responding to this question is relatively small (n = 22 for both program participants and
non-participants) due to the relatively low incidence of use noted above.
In general , users found the information on the website to be useful- 43 percent veryuseful and 39 percent somewhat useful. Program participants were somewhat more
likely than non-participants to suggest the information was not useful. This difference
however, was not statistically significant, due in part to the small cell sizes. Care
therefore, should be used in interpreting this result. However, more usability testing of
this specific web feature could be warranted.
Of those who found the site to be not useful (n = 8), half suggested making the site more
user friendly. Other suggestions included making the information more relevant to
their specific usage (2 participants) and providing more graphs (1 non-participant).
Table 17: How Useful the Electricity Usage Information Was on the Web site
All Respondents Participants Non-Participants
(n = 533)(n = 127) (n = 406)
Very Useful 43%45%41%
Somewhat Useful 39%27%50%
Neutral
Not Useful 14%18%10%
Mean
Mean is based on point scale where 1" means "very not useful" and 5" means "very useful,
Page. 9
In addition, web site visitors were asked if the electricity information provided on the
web site met their needs. Responses were recorded on a 5-point scale where "I" means
definitely did not meet needs" and "5" means "definitely met needs." Again, it is
important to note that the cell sizes of those responding to this question is relatively
small (n = 22 for both program participants and non-participants).
The majority of users said the information met their needs - 44 percent definitely met
needs and 42 percent somewhat met needs. Again, program participants were
somewhat more critical than non-participants - with 17 percent saying the information
provided did not meet their needs. However, due to the small cell sizes, this difference
is not statistically significant. Given the consistency of this finding, however, additional
testing of this web page may be warranted.
Table 18: The Information Provided on the Website Met Did Not Meet the Needs of the
Customer
All Respondents Participants Non-Participants
(n = 533)(n=127)(n = 406)
Definitely Met Needs 44%35%55%
Somewhat Met Needs 42%48%36%
Did not Meet Needs 13%17%10%
Mean
Mean is based on point scale where 1" means "definitely did not meet needs" and 5" means "definitely met needs,
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE.10
Finally, respondents were asked if they would prefer to see the electricity usage on their
Idaho Power bill or on Idaho Power s website. Eighty-seven percent (87%) of all
Emmett residents would rather get detailed information about their electricity usage
their Idaho Power bill. There was no difference between program participants and non-
participants.
Younger participants (those less than 65) are more interested than those over 65 in
getting information about electricity usage on the web site - 23 percent compared to 2
percent, respectively.
Figure 7: Preference on Where Customers Would Like to See Their Electricity Usage Information
Idaho Power
website
13%
Idaho Power bill
87%
Page. 11
Non-Participants
Awareness of Time-of-Day and Energy Watch Programs
Emmett customers who did not participate in the Time-of-Day or Energy Watch
programs were asked if they were aware that two pricing programs were available to
Emmett area residents this past summer. Fifty-five percent (55%) of respondents were
aware of these programs.
There were no differences in awareness by age. However, those living in the area for 10
or fewer years were more likely to be aware of the program than were those living in
the area for 11 to 25 years - 66 percent aware compared to 48 percent, respectively.
Customers who were aware of the two programs (n=221), were asked how they first
learned about the Time-of-Day and Energy Watch programs that Idaho Power offered
Emmett area residents. The majority of the respondents first learned about the
programs through a mailing from Idaho Power (64%) or in a message on their Idaho
Power bill (30%).
Participants between the ages of 25 and 44 were more likely to recall receiving a
mailing from Idaho Power (74%) while those between 45 and 64 were more likely to
recall seeing a message on their bill (36%).
Men were more likely than women to recall receiving a mailing - 72 percent compared
with 57 percent, respectively.
Figure 8: Non-Participants: How They First Learned About the Two Pricing Programs
Other
64%Mailing from Idaho
Power
Message on bill
Friend or neighbor
Ad in local newspaper
10%20%30%40%50%60%70%
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 12
In addition , non-participants who were aware of the two programs (n=221) were asked
if they had received enough information from Idaho Power to help make the decision
about whether or not to participate in the Time-of-Day or Energy Watch programs.
Responses were recorded on a 5-point scale where "I" means "strongly disagree" and "
means "strongly agree.
Over four out of five (83%) non-participants agreed that they received enough
information about these programs to make their decision.
Non-participants between the ages of 45 and 64 and, to a lesser extent, those 65 and
older were more likely to agree that they had received adequate information than did
those less than 45 years of age.
Although Emmett non-participants feel they received adequate information to make
their decision about participating in the pricing programs , 88 percent of the
respondents did not use the hourly electricity usage information to make their decision
to not participate in the programs.
Figure 9: Extent to Which Non-Participants Agree Disagree They Received Adequate Information
to Make Decision to Participate Not Participate in the Two Pricing Programs
Strongly Disagree
Strongly Agree
44%Somewhat Disagree
Somewhat Agree
39%
Mean = 4.
(5 = strongly agree;
1 = strongly disagree)
Page. 13
Reasons tor Not Participating in Time-ot-Day or Energy Watch Programs
In order to determine why Emmett area customers cbr s~ not to participate in the two
pricing programs, residents were asked the main reason why they didn t participate.
The main reasons cited by respondents were the following: not convenient (16%), life
style doesn t allow shifting of electricity use (15%), wouldn t save electricity (10%), and
doesn t fit schedule (9%).
Figure 10: Non-Participants: Reasons for Not Participating in One of the Two Pricing Programs
Not convenient
% of Non-Participants
Life style doesn t allow
shifting use
Wouldn t save electricity
Doesn t fit our schedule
Didn t want to change
when I use electricity
Not enough information
Not enough incentive
Wouldn t save money
Have kids at home
Didn t want to pay more
Other 23%
10%15%20%25%
Responses in the other category were reviewed and as appropriate coded into an existing or new category, Several
respondents to this question provided answers that indicated there was uncertainty about eligibility for participation in the
programs and whether the programs would offer benefits to them,
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 14
In addition to finding out why Emmett customers didn t participate in the programs
respondents were asked what would make the Time-of-Day or Energy Watch Programs
more appealing so that they might consider participating in a similar program in thefuture. Respondents would like to have more detailed information and reminders
(22%), different hours (17%), and lower rates during program times (11%). Nineteen
percent (19%) of non-participants proclaimed that there was nothing Idaho Power could
do to make the pricing programs more appealing.
Figure 11: Non-Participants: What Would Make the Time-of-Day or Energy Watch Programs
More Appealing?
Other
22%
Nothing
More detailed information and reminders
Different hours
Lower rates during program times
More incentive
More convenient times
More flexibility
10%15%20%25%
Page.
Participants
Information Sources
How Participants Learned about the Programs
Emmett area customers who participated in the Time-of-Day or Energy Watch
programs were asked how they first learned about the two programs.
Like non-participants, program participants were most likely to hear about the
programs through a mailing from Idaho Power (65%) and a message on their Idaho
Power bill (25%).
Figure 12: How Participants Learned About the Two Pricing Programs
Ad in the local
newspaper
65%Mailing from Idaho
Power
Message on bill
Friend or neighbor
Idaho Power employee
at Albertson s store
Idaho Power employee
contacted by phone
Other
-% of Participants
10%20%30%40%50%60%70%
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 16
Satisfaction with Information Received About Programs
Program participants were asked a series of statements about the information they
received during different states of the programs. Respondents were asked if Idaho
Power adequately explained the program options , if they received the information
needed from Idaho Power during the program, and if they received the information
needed from Idaho Power at the completion of the program. Responses were recorded
on a 5-point scale were "1" means "strongly disagree" and "5" means "strongly agree.
Overall, participants agree that they received enough information about the programs.
They were most likely to agree that they received adequate information before and
during the program. However, residents would have liked to have more information
from Idaho Power at the completion of the program, especially the participants in the
Energy Watch program.
Although program participants received enough information about the pricing
programs , 84 percent of the respondents did not use their hourly electricity usage
information to make their decision about participating in the programs.
Table 19: Participants: Satisfaction with the Information Received About the Two Pricing
Programs
Adequately Explained Received Information Received Information
Program Options Needed During the Needed After Program
Program
Strongly Agree 76%76%65%
Somewhat Agree 20%19%18%
Disagree 16%
Mean
Mean is based on point scale where 1" means "strongly disagree" and 5" means "strongly agree,
Page. 17
Lifestyle Changes
Participants were asked if their participation in the Time-of-Day or Energy Watch
program affected their lifestyle in anyway. Overall, fifty-three percent (53%) of
program participants feel that their lifestyle had not changed. Participants in the
Energy Watch program indicated that their lifestyle changed more than those
customers who participated in the Time-of-Day program (56 percent versus 39 percent
respectively).
Figure 13: Overall Lifestyle Changes by Participating in One of the Two Pricing Programs
70%61%
10%
60%
50%
40%
30%
20%
Total (n=127)Time of Day
(n=66)
Energy Watch
(n=61)
-% Yes _%No
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 18
As a follow-up for those program participants (n=60) who said their lifestyle had
changed where asked how dramatically was their lifestyle changed by participating in
one of these programs. For those participants who proclaimed that their lifestyle had
changed, 53 percent feel their lifestyle had somewhat changed and only 22 percent feel
their lifestyle had changed significantly.
Figure 14: How Dramatically Participants Lifestyles Had Changed
Not at all Very little
22%
Significantly
22%
Page.
Of those customers who said their lifestyle had changed as a result of participating in
one of these programs, 24 percent of the Energy Watch participants said their lifestyle
changed significantly and 56 percent said their lifestyle had changed somewhat.
Nineteen percent (19%) of Time-of-Day participants said that their lifestyle changed
significantly with another 50 percent saying their lifestyle had changed somewhat. It is
important to note that the cell sizes of those responding to this question is relatively
small (n=26 for Time-of-Day and n=34 for Energy Watch participants). Care , therefore
should be used in interpreting these results.
Figure 15: How Dramatically Participants Lifestyles Had Changed by Type of Participant
60%56%
10%
50%
40%
30%
20%
Time-of-Day (n=26)Energy Watch (n=34)
Not at all 0 Very little - Somewhat - Significantly
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 20
As a follow-up to asking about lifestyle changes, residents who felt their lifestyles had
changed were asked what the most significant change in their lifestyle was in order to
reduce their electricity usage during certain hours. Overall, program participants
indicated that laundry (26%) and household temperature / comfort (26%) were the most
significant changes in their lifestyle.
It was apparent that the participants in these two programs responded very differently.
Time-of-Day participants indicated that the most significant change to their household
lifestyle was laundry (60%). Energy Watch program participants indicated that
household temperature / comfort was the most significant change to their household
lifestyle (36%). Again, because of the small cell sizes of those responding to this
question (n=26 for Time-of-Day and n=34 for Energy Watch participants) care should be
used in interpreting these results.
Figure 16: Time of Day Participants: The Most Significant Change in Their Lifestyle
Time-of-Day Participants
Other
60%Laundry
Household temperature comfort
Turned power completely off
Washing dishes
Cooking
10%20% 30%40% 50%60% 70%
Page.
Figure 17: Energy Watch Participants: The Most Significant Change in Their Lifestyle
Energy Watch Participants
Household
temperature
comfort
Turned power
completely off
Leaving the house
more often
Washing dishes
Other
36%
10%40%15%20%25%30%35%
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 22
Changes in the Electricity Bill
In addition to lifestyle changes , program participants (n=127) were asked if their
electricity bill changed as a result of participating in one of the two pricing programs.
For the most part, 44 percent felt their bill had decreased, but 38 percent of programparticipants said that their bill had stayed the same.
Most Energy Watch program participants felt their bill decreased (41%) or stayed the
same (49%). Time-of-Day participants also felt their bill decreased (47%), but 24
percent of them felt their bill increased and 29 percent felt it stayed the same.
Figure 18: Changes in the Electricity Bill by Type of Participant
60%
50%47%49%
10%
40%
30%
20%
Total Participants Time of Day Energy Watch(n=127) Participants (n=66) Participants (n=61)
. Decreased. Stayed the Same 0 Increased
Page. 23
Likelihood to Participate in Time-ot-Day and/or Energy Watch Programs in the Future
Emmett area customers who participated in one of the two programs were asked how
likely they would be to participate in the Time-of-Day or Energy Watch Programs if
Idaho Power offered them again. Responses were recorded on a 5-point scale where "
means "very unlikely" and "5" means "very likely.
Overall, Emmett residents who participated in the programs would be likely to
participate in the programs in the future - 22 percent are "somewhat likely" and 60
percent are "very likely" with little difference between Energy Watch and Time-of-Day
participants. Residents who reported their electricity bill decreased are more likely to
participate in these programs in the future compared to those whose bill stayed the
same or increased.
Table 20: Likelihood of Participating in One of the Two Pricing Programs in the Future by
Reported Change in Bill
Reported Change in Bill
Likelihood of Stayed the same
Participating in the Total Decreased (n=41)Increased
Future (n=127)(n=47)(n=19)
Very Unlikely 13%16%
Somewhat Unlikely 10%26%
Neither Likely Nor
Unlikely
Somewhat Likely 22%15%33%21%
Very Likely 60%79%48%32%
Mean
Mean based on point scale where 1" means "very unlikely" and 5" means "very likely,
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 24
Residents who participated in the programs were also asked how likely they would be to
recommend the Time-of- Day and Energy Watch programs to their friends and family if
the programs were offered again. Responses were recorded on the same 5-point scale
where "1" means "very unlikely" and "5" means "very likely.
Customers who participated in one of the pricing programs in the summer of 2005, in
general are likely to recommend these programs to their friends and family, but there
were some differences depending on which of the two programs customers participatedin. Although not significant, a slightly higher percentage of customers who participated
in the Energy Watch program were inclined to recommend the program than those who
participated in the Time-of-Day program - 79 percent versus 74 percent, respectively.
The most notable difference though was with the percentage of customers who said they
definitely would not recommend the Time-of-Day (20%) versus those who would not
recommend in the Energy Watch program (8%). In addition, customers who
participated in either of the pricing programs are more likely to recommend the pricing
programs if they reported their electricity bill had decreased because of participating in
the programs.
Table 21: Likelihood of Recommending One of the Pricing Programs by Type of Participant
Likelihood of Total Participants Time-of-Day Energy Watch
Recommending (n=127)(n=66)(n=61)
Very Likely 50%46%54%
Somewhat Likely 26%28%25%
Neither Likely Nor Unlikely
Somewhat Unlikely 11%
Very Unlikely 14%20%
Mean
Mean based on point scale where 1" means "ve1Y unlikely" and 5" means "ve1Y likely,
Page. 25
In addition to recommending the programs , participants were asked how likely they
would be to participate in a similar program ifit were offered year round. Responses
were recorded on the same 5-point scale where "I" means "very unlikely" and "5" means
very likely." Time-of-Day participants are slightly more likely to participate in a year-
round program than are Energy Watch participants. Fifty-five percent (55%) of the
Time-of-Day participants (n=66) stated that it was "very likely" they would participate
in a year-round program and 41 percent of the Energy Watch participants (n=61) stated
that they are "very likely" to participate in a year-round program.
Table 22: Likelihood of Participating Year Round by Type of Participant
Likelihood of Total Participants Time-of-Day Energy Watch
Participating Year-round (n=127)(n=66)(n=61)
Very Likely 48%55%41%
Somewhat Likely 32%29%36%
Neither Likely Nor Unlikely
Somewhat Unlikely 12%
Very Unlikely 11%11%10%
Mean
Mean based on point scale where 1" means "very unlikely" and 5" means "very likely,
Finally, Emmett area customers who participated in the programs were asked how
likely they were to participate in a similar program if the hours when electricity rates
are the highest were changed slightly for these programs. Responses were recorded on
a 5-point scale where "I" means "very unlikely" and "5" means "very likely.
Overall, 86 percent of program participants would be likely to participate in a similar
program if the electricity rates were changed slightly for these programs. Compared to
Time-of-Day participants, Energy Watch participants are slightly more inclined to
participate in a similar program if the hours are changed slightly - 88 percent versus
percent, respectively.
Table 23: Likelihood of Participating in a Similar Program by Type of Participant
Likelihood of Total Participants Time-of-Day Energy Watch
Participating (n=127)(n=66)(n=61)
Very Likely 45%41%48%
Somewhat Likely 41%43%40%
Neither Likely Nor Unlikely
Somewhat Unlikely
Very Unlikely
Mean
Mean based on point scale where 1" means "very unlikely" and 5" means "very likely,
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 26
Suggestions to Improving the Time-of-Day and/or Energy Watch Programs
Program participants were asked if they had any suggestions that would make the
Time-of-Day or Energy Watch Program more appealing. Approximately one-half of
respondents proclaimed that they wouldn t change anything. Thirty-two percent (32%)
of Time-of-Day participants and 14 percent of Energy Watch participants would like
different hours during the program. In addition, 15 percent of Time-of-Day participants
and 19 percent of Energy Watch participants would like a more convenient time for
program participants.
Figure 19: Time of Day Participants: Suggestions to Improving the Program
Time-of-Day Participants
Other
54%
Worked out fine
nothing
Different hours
More convenient
times
Lower rates during
program times
10%20%30%40%50%60%
Page. 27
Figure 20: Energy Watch Participants: Suggestions to Improving the Program
Energy Watch Participants
Worked out fine
nothing
Different hours
More convenient
times
Lower rates during
program times
More flexibility
More incentive
Other
10%30%40%
47%
50%20%
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 28
Study Concl us ions
Overall, Emmett area customers (both non-participants and program participants)
are satisfied with the level of service they receive from Idaho Power. In addition
Emmett customers' satisfaction level has stayed constant within the past twelve (12)
months.
The most effective means to provide customers with information about new programs
and services is by direct mail and/or information provided with the bill.
The majority of non-participants was aware of the Time-of-Day and Energy Watch
programs and agreed that Idaho Power gave them enough information about these
two programs. However, non-participants did not want to participate in these
programs because they did not feel the programs were convenient or would save
enough electricity. In addition, they did not want to change when they use electricity
and they felt there was not enough incentive to participate. Idaho Power may wish
to conduct additional research to understand what types of programs would
perceived as convenient and would incent people to participate.
As for the Emmett customers who participated in one of these programs, they were
satisfied with the programs and would participate in the programs again if they were
offered to them. Participants also agreed that they would recommend the Time-of-
Day and Energy Watch programs to their family and friends especially if they felt
their electricity bill decreased. Past program participants represent a significant
opportunity for boosting future participation by having them serve as advocates
and/or providing them with an incentive to get a friend or neighbor to participate.
In order for Idaho Power to acquire more customers interested in these types of
programs, Idaho Power will need to show the non-participants the benefits of
participating in Time-of-Day and Energy Watch programs. One of the main reasons
why the non-participants do not want to be a part of these programs is because they
think they will lose control over when they can use their electricity. Based upon the
verbatim responses from this study, there seemed to be confusion for a number of
customers who elected not to participate in either the Time-of-Day or Energy Watch
programs with the direct load control program that was offered by Idaho Power
during the same time period. In the course of the survey, it was stated very explicitly
that the question were being asked about the Time-of- Day and Energy Watch
programs and not the AC Cool Credit program. Despite this, a number of customers
still commented on either not having air conditioning or using swamp coolers so
thinking they were ineligible to participate in either of these programs. A number of
customers also cited being gone for the summer as the reason for not participating.
the program ran beyond one season, Idaho Power may see more participation.
Page. 29
Methodology
Questionnaire Design
Northwest Research Group, Inc. (NWRG) consulted with Idaho Power to design
customized research questions. The customized questions included the following:
Overall impression of Idaho Power
Overall awareness of AMR meter and energy usage information
- Non-participants awareness of Time-of-Day and Energy Watch programs
- Non-participants overall impression of Time-of-Day and Energy Watch
programs
Program participants overall impression of Time-of-Day and Energy Watch
and
Demographic questions.
The questionnaire used a variety of question formats, including closed single and
multiple-response questions for all categorical data. In situations where not all
potential responses could be anticipated, an "other" category was included. These
results were then reviewed and, where appropriate, post-coded into the database.
One open-ended question was included asking program participants if they had any
other comments that they would like to make about the Time-of-Day and/or Energy
Watch programs. Based on a review of these responses, a code list was developed to
capture the range of responses. Results from the open-ended question were then
coded and entered into the respondent database.
The survey was administered using computer-assisted telephone interviewing
technology. The computer program automatically handled all skip and branching
patterns. A copy of the customized questions included in the questionnaire may be
found in the Appendix.
Sampling
The study is based on a sample of 400 non-participants and 160 program participants
of the Energy Watch and/or Time-of-Day program. The sample is drawn and
administered using a targeted listed sample provided by Idaho Power which included
both non-participants and program participants living in Emmett.
Interviews were conducted between September 15 and September 28 , 2005. NWRG
conducted interviews daily until 9:00 p.m. and weekends during the afternoon and
early evening hours. Each sample element was attempted up to five times
maximize the extent to which the sample represents the population. This method
ensures that each household has a known probability of being selected for an
interview. Northwest Research Group completed a total of 406 interviews among
non-participants and 127 among program participants.
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 30
Final Interviewing Outcomes
Declining response rates resulting from the inability to reach households with
targeted respondents at home and increasing refusal rates are of significant concern
in telephone survey research. Strict calling procedures are used to maximize
response rates including:
Scheduling call-back interviews as required to complete surveys at a
convenient time.
Re-contacting individuals who initially refused to complete the survey at
alternative time to determine their willingness to complete. Note the
majority of initial refusals to surveys occur prior to hearing the
introduction. Moreover, the person answering the phone may not be the
individual in the household scheduled to be interviewed.
Calling back households who do not answer or have busy numbers up to
five times to maximize contact rates.
The response rate for the Idaho Power Emmett survey based on 2004 AAPOR
(American Association for Public Opinion Research) formula is 83 percent for
program participants and 26 percent for non-participants. Of those reached, only 1
percent of program participants refused and 7 of non-participants percent refused to
complete the survey. This is significantly lower than the national average for RDD
samples where the refusal rate is as high as 40 percent.
Page. 31
Appendix
Questionnaire
INTRODUCTION
INTRO Hello, this is with Northwest Research Group, Inc. We are an
independent research firm conducting a brief survey on behalf of Idaho Power and would
like to include your opinions. The purpose of this study is to develop information about
the overall perceptions and opinions of Idaho Power s customers. This study is being
conducted for research purposes only and this call may be monitored and/or recorded for
quality purposes.
(AS NEEDED: Let me assure you that this is not a sales call , and the information you give
will be kept strictly confidential. If you want more information about NWRG, you may visit
our web site www.nwrg.com.
(AS NEEDED: The interview will only take 10 minutes of your time.
SCR1 May I please speak with the person that is most responsible for paying the electricity bill at
your (ENTER FROM SAMPLE: HOME)?
SCR2
RESPONDENT AVAILABLE
RESPONDENT NOT AVAILABLE (CTRL-END, SCHEDULE CALLBACK)
NO, NOT INTERESTED (SKIP TO THANK9j DISPOS = 5)
LANGUAGE BARRIER (SKIP TO THANK2; DISPOS = 10)
DON'T KNOW REFUSED (SKIP TO THANK8; DISPOS=8)
Do you or does anyone in your household work for a public utility, utitity commission
market research firm , or the media?
YES (SKIP TO THANK9; DISPOS = 24)
DON'T KNOW (SKIP TO THANK9j DISPOS = 8)
REFUSED (SKIP TO THANK9j DISPOS = 8)
GENDER (ENTER GENDER OF RESPONDENT)
MALE
FEMALE
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 32
OVERALL IMPRESSION
ASK OF ALL PARTICIPANTS
011NT To start, I'd like to ask you a few questions related to your overall impressions of Idaho
Power.
Overall , are you satisfied or dissatisfied with the level of service you receive from Idaho
Power? Would that be very or somewhat satisfied / dissatisfied?
VERY DISSATISFIED
SOMEWHAT DISSATISFIED
NEITHER SATISFIED NOR DISSATISFIED
SOMEWHAT SATISFIED
VERY SATISFIED
DON'T KNOW REFUSED
Has your level of satisfaction with Idaho Power become stronger, weaker or stayed the
same over the past twelve (12) months? Would that be much or somewhat stronger /
weaker?
MUCH WEAKER
SOMEWHAT WEAKER
STAYED THE SAME
SOMEWHAT STRONGER
MUCH STRONGER
DON'T KNOW REFUSED
I am going to read you several statements about Idaho Power. As I read each one please
tell me whether you agree or disagree with the statement.
Do you agree or disagree that (ENTER STATEMENT: Q3A - Q3C)? Would that be
strongly or somewhat agree / disagree?
STRONGLY DISAGREE
SOMEWHAT DISAGREE
NEITHER AGREE NOR DISAGREE
SOMEWHAT AGREE
STRONGLY AGREE
DON'T KNOW REFUSED
RANDOMIZE
03A
03B
Idaho Power has kept you informed about changes that may affect your account
Idaho Power has provided you with information to help make decisions about how
to use electricity efficiently
Page. 33
03C Idaho Power has provided you with information to help make decisions about the
best time to use electricity
Now I am now going to read you several statements about your electricity meter, which is an
Advanced Meter Reading meter, or AMR meter. As I read each one please indicate whether you
are aware or not aware of each of the pieces of information.
Please use scale from to 10 where 0" means that you are not at all aware and "10"
means you are very aware. You may use any number from to 10.
How aware are you that (ENTER STATEMENT: Q4A-Q4D)?
NOT AT ALL AWARE
VERY AWARE
DON'T KNOW / REFUSED
RANDOMIZE
Idaho Power installed a new AMR meter on your residence within the past
eighteen (18) months
Your AMR meter is read remotely
You no longer have a meter reader coming on to your property on a monthly basis
You have the ability to get your hourly and daily electricity usage information from
Idaho Power s website
You may have noticed that your new AMR meter looks different than your previous meter.
Is the information displayed on the AMR meter helpful in managing your electricity usage?
YES
HAVEN'T NOTICED A DIFFERENCE IN THE METER
DON'T KNOW/REFUSED
04A
04B
04C
04D
Do you have a need or interest in knowing your hourly electricity usage?
YES
DON'T KNOW/REFUSED
Do you have a need or interest in knowing your daily electricity usage?
YES
DON'T KNOW/REFUSED
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE.
010
011
012
Have you ever gone to Idaho Power s web-site for your electricity usage information?
YES
NO (SKIP TO Q12)
DON'T KNOW/REFUSED (SKIP TO Q12)
(08=1) Was your electricity usage information on Idaho Power s web-site useful? Would
that be very or somewhat useful/not useful?
VERY NOT USEFUL
SOMEWHAT NOT USEFUL
NEITHER USEFUL NOR NOT USEFUL
SOMEWHAT USEFUL (SKIP TO Q11)
VERY USEFUL-(SKIP TO Q11)
DON'T KNOW / REFUSED
(09=1-3) What suggestions do you have to make the information more useful?
DO NOT READ LIST
SELECT ALL THAT APPLY
MORE USER-FRIENDLY
MORE GRAPHS
MORE RELEVANT TO MY USAGE
OTHER (SPECIFY)
OTHER (SPECIFY)
OTHER (SPECIFY)
DON'T KNOW / REFUSED
(IF Q8=1) Did your electricity usage information on Idaho Power s web-site meet your
needs? Would that be definitely or somewhat met / did not meet?
DEFINITELY DID NOT MEET NEEDS
SOMEWHAT DID NOT MEET NEEDS
NEITHER MET NOR DIDN'T MEET NEEDS
SOMEWHAT MET NEEDS
DEFINITELY MET NEEDS
(ALL) Where would you prefer to get detailed information about your electricity usage?
On your monthly Idaho Power bill or on Idaho Power s web-site?
IDAHO POWER BILL
IDAHO POWER WEBSITE
DON'T KNOW/REFUSED
(EMMETT PROGRAM PARTICPANTS (SKIP TO Q191NTI
Page. 35
EMMETT - NON-PROGRAM PARTICIPANTS
In April and May of 2005, Idaho Power offered Emmett area customers the opportunity to
participate in one of three programs during the summer of 2005. Two of these programs, Time-of-
Day and Energy Watch , were special pricing programs and the AC Cool Credit program allowed
customers to receive credits on their electric bills for allowing Idaho Power to interrupt their air
conditioners at certain times during the month. For the purposes of this survey, we will ONLY be
discussing the Time-of-Day and Energy Watch programs.
Prior to this survey, were you aware the two pricing programs, Time-of-Day and Energy
Watch, were available to Emmett area residents this past summer?
YES
NO (SKIP TO DEMOINT)
DON'T KNOW REFUSED (SKIP TO DEMOINT)
013
014
0151NT
015
016
How did you first learn about the Time-of-Day and Energy Watch programs that Idaho
Power offered to Emmett area residents?
DO NOT READ LIST
MAILING FROM IDAHO POWER
AD IN THE LOCAL NEWSPAPER
IDAHO POWER EMPLOYEES AT LOCAL ALBERTSON'S STORE
FRIEND OR NEIGHBOR
MESSAGE ON BILL
OTHER (SPECIFY)
DON'T KNOW REFUSED
d now like to ask you a few questions about those pricing programs.
Do you agree or disagree that you received enough information from Idaho Power to help
you make the decision about whether or not to participate in either the Time-of-Day or
Energy Watch program? Would that be strongly or somewhat agree / disagree?
STRONGLY DISAGREE
SOMEWHAT DISAGREE
NEITHER AGREE NOR DISAGREE
SOMEWHAT AGREE
STRONGLY AGREE
DON'T KNOW REFUSED
Did you use your hourly electricity usage information that was available on Idaho Power
web-site to help you make a decision about participating in one of these programs?
YES
DON'T KNOW REFUSED
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 36
017
018
What is the main reason you did not participate in either the Time-of-Day or Energy Watch
Program?
DO NOT READ LIST
DIDN'T W ANT TO CHANGE WHEN I USE ELECTRICITY
DIDN'T WANT TO PAY MORE FOR USAGE AT CERTAIN TIMES
PREFER FLAT RATE
LIFE STYLE DOESN'T ALLOW SHIFTING OF ELECTRICITY USE
HAVE KIDS AT HOME /HARD TO CONTROL ELECTRICITY USE
NOT CONVENIENT
DOESN'T FIT OUR SCHEDULE
TOO EXPENSIVE
WOULDN'T SAVE MONEY
WOULDN'T SAVE ELECTRICITY
NOT ENOUGH INCENTIVE
OTHER (SPECIFY)
DON'T KNOW / REFUSED
Not enough Information
What would make the Time-of-Day or Energy Watch Program more appealing to you so
that you might consider participating in a similar program in the future?
DO NOT READ LIST
LOWER RATES DURING PROGRAM TIMES
MORE CONVENIENT TIMES FOR PROGRAM PARTICIPATION
MORE FLEXIBILITY
MORE INCENTIVE
DIFFERENT HOURS
OTHER (SPECIFY)
DON'T KNOW / REFUSED
More detailed information and reminders
Nothing
(EMMETT NON-PROGRAM PARTICIPANTS (SKIP TO DEMOINT)
Page. 37
EMMETI - PROGRAM PARTICIPANTS
In April and May of 2005, Idaho Power offered Emmett area customers the opportunity to
participate in one of three programs during the summer of 2005. Two of these programs , Time-of-
Day and Energy Watch , were special pricing programs and the AC Cool Credit program allowed
customers to receive credits on their electric bills for allowing Idaho Power to interrupt their air
conditioners at certain times during the month. For the purposes of this survey, we witl ONLY be
discussing the Time-of-Day and Energy Watch programs.
0191NT Now, I'd like to ask you a few questions about the pricing program that you participated in
this summer.
019
020
How did you first learn about the Time-of-Day and Energy Watch programs that Idaho
Power offered to Emmett area residents?
DO NOT READ LIST
MAILING FROM IDAHO POWER
AD IN THE LOCAL NEWSPAPER
IDAHO POWER EMPLOYEES AT LOCAL ALBERTSON'S STORE
FRIEND OR NEIGHBOR
MESSAGE ON BILL
OTHER (SPECIFY)
DON'T KNOW / REFUSED
Idaho employee contacted by phone
I am going to read you several statements about information related to the pricing
programs. As I read each one please tell me whether you agree or disagree with the
statement.
Do you agree or disagree that (ENTER STATEMENT: Q20A-Q20C)? Would that be
strongly or somewhat agree / disagree?
STRONGLY DISAGREE
SOMEWHAT DISAGREE
NEITHER AGREE NOR DISAGREE
SOMEWHAT AGREE
STRONGLY AGREE
DON'T KNOW / REFUSED
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 38
RANDOMIZE
020A Idaho Power adequately explained the program options
020B You received the information you needed from Idaho Power during the program
020C You received the information you needed from Idaho Power at the completion of
the program
021 Did you use your hourly electricity usage information that was available on Idaho Power
web-site to help you make a decision about participating in one of these programs?
YES
DON'T KNOW REFUSED
022 Did participating in this program affect your lifestyle in any way?
(AS NEEDED: Did it change the way you used electricity in your home in any way?)
YES
NO (SKIP TO 025)
DON'T KNOW/REFUSED (SKIP TO 025)
023 (Q22 = 1 J How dramatically was your lifestyle affected by participating in this program?
Was it affected significantly, somewhat, very little, or not at all?
024
NOT AT ALL
VERY LITTLE
SOMEWHAT
SIGNIFICANTLY
DON'T KNOW REFUSED
(Q22 =1 J What was the most significant change to your lifestyle in trying to reduce your
electricity usage during certain hours?
DO NOT READ LIST
LAUNDRY
WASHING DISHES
HOUSEHOLD TEMPERATURE COMFORT
COOKING
SHOWERING BATHING
OTHER (SPECIFY)
DON'T KNOW REFUSED
Turned power completely off
Going out of house more often/not staying home
Page. 39
025
026
027
028
029
(ALL) How did your electricity bill change as a result of participating in the program? Did
it decrease, stay the same or increase?
DECREASE
STAY THE SAME
INCREASE
DON'T KNOW / REFUSED
Would you be likely or unlikely to participate if the Time-of-Day and Energy Watch
programs were offered again? Would that be very or somewhat likely / unlikely?
VERY UNLlKLEY
SOMEWHAT UNLlKLEY
NEITHER LlKLEY NOR UNLIKELY
SOMEWHAT LIKELY
VERY LIKELY
DON'T KNOW / REFUSED
Would you be likely or unlikely to recommend the Time-of-Day and Energy Watch
programs to your friends and famity if they were offered again? Would that be very or
somewhat likely / unlikely?
VERY UNLlKLEY
SOMEWHAT UNLlKLEY
NEITHER LlKLEY NOR UNLIKELY
SOMEWHAT LIKELY
VERY LIKELY
DON'T KNOW / REFUSED
Would you be likely or unlikely to participate in a similar program if offered year round?
Would that be very or somewhat likely / unlikely?
VERY UNLlKLEY
SOMEWHAT UNLlKLEY
NEITHER LlKLEY NOR UNLIKELY
SOMEWHAT LIKELY
VERY LIKELY
DON'T KNOW / REFUSED
Would you be likely or unlikely to participate in a similar program if the hours when
electricity rates are the highest were changed slightly for these programs? Would that be
very or somewhat likely / unlikely?
VERY UNLlKLEY
SOMEWHAT UNLlKLEY
NEITHER LlKLEY NOR UNLIKELY
SOMEWHAT LIKELY
VERY LIKELY
DON'T KNOW / REFUSED
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE. 40
030
031
Do you have any suggestions that would make the Time-of-Day or Energy Watch
Program more appealing?
DO NOT READ LIST
SELECT ALL THAT APPLY
LOWER RATES DURING PROGRAM TIMES
MORE CONVENIENT TIMES FOR PROGRAM PARTICIPATION
MORE FLEXIBILITY
MORE INCENTIVE
DIFFERENT HOURS
OTHER (SPECIFY)
OTHER (SPECIFY)
OTHER (SPECIFY)
DON'T KNOW REFUSED
10 No, it worked fine Nothing
Do you have any other comments that you would like to make regarding the Energy
Watch or Time-of-Day program?
(OPEN-ENDED RESPONSE)
Liked the program and was well satisfied.
Nothing / no comments
The program was okay (neutral response)
They didn t like the program at all would never use it again
Other
Don t know
Refused
DEMOGRAPHICS
DEMOI NT
DEMO1
DEMO2
EDUC
The following questions are for classification purposes only. Your answers will remain
strictly confidential and will only be used to help us group your answers.
Which of the following categories does your age fall into?
Under 25,
25 to 44
45 to 64, or
65 or above?
DON'T KNOW REFUSED
How long have you been an Idaho Power customer?
Less than 1 year
1 to 10 years,
11 to 25 years,
26 years or more?
DON'T KNOW REFUSED
What is the highest level of education you have completed?
Did not finish high school
High school graduate GED
Some college technical school
Associate other degree
College degree
Some graduate school, or
Page. 41
DWELL
HHSIZE
CHILD1
CHILD2
CHILD3
CHILD4
THANK1
THANK2
THANK8
THANK9
Graduate degree
DON'T KNOW REFUSED
Which of the following best describes your home?
A single-family house not attached to any other dwelling,
A townhouse or condo
A duplex or triplex
An apartment
A manufactured home
A mobile home
OTHER (SPECIFY)
DON'T KNOW REFUSED
Including yourself how many adults age 18 and older live in your home full-time?
ENTER ACTUAL NUMBER99 DON'T KNOW REFUSED
How many persons under the age of 18 do you have living at home full time?
ENTER ACTUAL NUMBER99 DON'T KNOW REFUSED
(IF CHILD = 0 OR 99, SKIP THANK1)
How many of these children are under the age of 5?
ENTER ACTUAL NUMBER99 DON'T KNOW REFUSED
How many of these children are age 6 to 12?
ENTER ACTUAL NUMBER99 DON'T KNOW REFUSED
How many of these children are age 13 to 17?
ENTER ACTUAL NUMBER99 DON'T KNOW REFUSED
Thank you very much for your time. Your opinions are important to us! On behalf of
Northwest Research Group and Idaho Power, I'd like to thank you for participating in our
survey tonight / today. Have a good day / evening. (DISPOS = 40)
m sorry, but we are only conducting English interviews today / tonight. Have a good day /
evening. (DISPOS 10)
Those are all of the questions I have. I cannot continue with that information. Thank you
for your time. (DISPOS = 8)
Those are all of the questions we have. Have a good day / evening.
Idaho Power Emmett Study Final Report
Submitted by Northwest Research Group, Inc. November 2005 PAGE.
Final Report
Time-of-Day and Energy Watch Pilot Programs March 29 2006
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An IDACORP ::omp.1ny
Idaho Power Company
Residential Time-at-Day and
Energy Watch Pilot Program Analysis
Final Report
January 2006
Prepared for
Idaho Power Company
Prepared by
RLW Analytics
2 Hyde Road
Clarklake , MI 49234
517 529 6277
RLW Analytics: Sonoma CA. Middletown CT . Ciark Lake MI . Albany NY
Idaho Power Company
Residential Time-at-Day and
Energy Watch Pilot Program Analysis
Final Report
List at Tables
Table Ex 1 - Time-Of-Day Summary Results .......................................................................... 2
Table Ex 2 - Time-of-Day Bill Comparisons ........................................................................... 3
Table Ex 3 - Energy Watch Program Summary....................................................................... 4
Table Ex 4 - Energy Watch Bill Comparisons .........................................................................
Table 1 - IPCO System Peak Information ................................................................................ 9
Table 2 - Average Demand and Energy Usage Characteristics.............................................. 11
Table 3 - 2004 Pre Period Consumption Comparison ............................................................
Table 4 - 2005 Time-of-Day Usage Comparisons.......,.......................................................... 17
Table 5 - T-Test Analysis Results .......................................................................................... 17
Table 6 - Time-of-Day Bill Comparisons............................................................,.................. 19
Table 7 - Critical Peak Pricing Event Days .......,.................................................................... 20
Table 8 - Energy Watch Days...............................................................................................,.
Table 9 - Energy Watch Pilot Summary................................................................................. 24Table 10 - Energy Watch Bill .Comparisons.......................................................................... 35
Table 11 - Summary of Residential Rates ..............................................................................
RL Analytics Page ii
Idaho Power Company
Residential Time-at-Day and
Energy Watch Pilot Program Analysis
Final Report
List at Figu res
Figure Ex 1 - Average Weekday Comparison.......................................................................... 1
Figure Ex 2 - Energy Watch Program - Average Impacts ....................................................... 4
Figure 1 - Hourly Temperature Data ........................................................................................ 8
Figure 2 - IPCa System Load
................................................................................................
Figure 3 - Non-Summer versus Summer System Peaks ......................................................... 10
Figure 4 - Residential TaD Average Demand
.......................................................................
Figure 5 - Residential TaD Summer Load............................................................................. 12
Figure 6 - TaD Control Group...............................................................................................
Figure 7 - Pre Period Comparison .......................................................................................... 13
Figure 8 - 2004 Summer Class Peak Comparison.................................................................. 13
Figure 9 - Pre-Period Average Weekday Comparisons.......................................................... 14
Figure 10 - Pre-Period Average Weekend Day Comparisons ................................................
Figure 11 - 2005 Average Weekday Comparisons................................................................. 16
Figure 12 - 2005 Average Weekend Comparisons............................,.................................... 16
Figure 13 - System Peak Reduction ......................,................................................................
Figure 14 - Energy Watch Pilot Participants .......................,.................................................. 20
Figure 15 - CPP Event Days................................................................................................... 21
Figure 16 - EW Control Group............................................,.,....,...........................................
Figure 17 - Pre Period Comparison ........................................................................................ 22
Figure 18 - 2004 Summer Class Peak Comparison ........,....................................................... 23
Figure 19 - Pre-Period Average Weekday Comparisons........................................................ 23
Figure 20 - Pre-Period Average Weekend Day Comparisons ................................................ 24
Figure 21 - Energy Watch Pilot: Week of July 7 2005.......................................................... 25
Figure 22 - Event Day Impacts: Thursday, July 7, 2005........................................................
Figure 23 - Energy Watch Pilot: Week of July 10,2005........................................................
Figure 24 - Event Day Impacts: Wednesday, July 13,2005................................................... 26
Figure 25 - Event Day Impacts: Friday, July 15 2005........................................................... 27
Figure 26 - Energy Watch Pilot: Week of July 17 2005........................................................ 28
Figure 27 - Event Day: Thursday, July 21 , 2005....................................................................
Figure 28 - Energy Watch Pilot: Week of July 24, 2005........................................................
Figure 29 - Event Day: Wednesday, July 27,2005.......,........................................................ 29
Figure 30 - Event Day: Friday, July 29, 2005 ........................................................................ 30
Figure 31 - Energy Watch Pilot: Week of July 31 , 2005................................,....................... 30
Figure 32 - Event Day: Thursday, August 4 2005.................................................................
Figure 33 - Energy Watch Pilot: Week of August 7 2005..................................................... 32
Figure 34 - Event Day: Tuesday, August 9,2005 .................................................................. 32
Figure 35 - Event Day: Thursday, August 11 2005...............................................................
Figure 36 - Event Day Summary ............................................................................................ 33
Figure 37 - EW Reduction versus Temperature .....................................................................
Figure 38 - Average of All Event Days ..................................................................................
RL Analytics Page iii
Idaho Power Company
Residential Time-at-Day and
Energy Watch Pilot Program Analysis
EXECUTIVE SUMMARY
The Time-of-Day (TaD) and Energy Watch (EW) Pilot Programs were approved by the Idaho
Public Utilities Commission (IPUC) on March 22, 2005. The programs were in effect from June
to August 31 , 2005. The goal of both programs is to test the ability of the AMR system to enable
Idaho Power Company (IPCO) to offer time-variant programs and to ascertain the ability of these
programs to reduce peak loads during the summer months. Offering these programs allowed IPCO
to design, test, and implement program marketing plans, internal company processes, and workflow
procedures. These programs were offered only to residential customers in the Emmett, Idaho area.
1.1 Summary of Results: Time-of-Day Pilot
Time-of-Day is a conventional time-of-use energy program in which participants are charged
differing electricity rates for the following times and days of the weeks:
. On-peak ($0.068686): Weekdays from Ipm to 9pm
. Mid-peak ($0.061717): Weekdays from 7am to Ipm
. Off-Peak ($0.053004): Weekdays from 9pm- 7am, and all hours weekends and holidays
At the end of August 2005, there were 92 time-of-day pilot program participants. The analysis
was based on interval hourly load data collected through the advanced meter reading (AMR)
system for 90 of the time-of-day test participants and a matched control group sample.
Average Weekday Comparison - 2005
June July August
06,00 12,00 12,00 06,00 12,00
H: Control Group, Mean , TOO
B: TOO Test Group, Mean, TOO
Figure Ex 1 - Average Weekday Comparison
Figure Ex 1 presents a series of graphs comparing the average weekday demand for the test group
(i., time-of-day) customers and their control group counterparts. The graph indicates the
average demand per customer during the average weekday period is lower for the test group
customers when compared to the control group.
RL W Analytics Page 1
Residential Time-of-Day
Energy Watch Evaluations
Table Ex 1 summarizes the energy usage associated with the test group and control group by
time-of-use period. The table displays the average energy usage by month and for the entire
summer along with the percentage of average total use each time-of-use period. In addition, the
table presents the difference between the control group usage and the test group usage with
positive numbers indicating that the test group used less energy than the control group in that
particular period. Finally, the table includes the results of a statistical T-test that tests the
hypothesis that the difference is statistically equal to zero. The T-test statistic along with the
probability of getting a larger T -value is presented. The difference is deemed statistically
significant at the 10% level if the PR:;::.ITI is less that 0,1000. During the summer of 2005 the test
group on average used 54 kWh less during the on-peak period and 49 kWh more during the off-
peak: period. While the results were not statistically significant at the 10% level there was some
empirical evidence to indicate that the time-of-day pilot participants reduced their use during the
on-peak: period with some shifting of load to the off-peak: period.
Total Use (kWh)Percent of Total Use
Control TaD Test Control TaD Test Control-TaD
Period (n=420)(n=90)(n=420)(n=90)Difference Value PR~ITI
June Usage
On-Peak 181.79 167,19,19,13,1.30 1960
Mid-Peak 175,171.90 19,19,7208
Off-Peak 556,545,60,61.6%11.06 7461
June Usage 914,885,100,100,28,5956
July Usage
On-Peak 265,239.10 21.2%18,25,1.55 0.1224
Mid-Peak 184,178,14,13,6177
Off-Peak 798,876,64,67,(77.48)(0,28)7774
July Usage 248,293,100,100,(45,68)8231
August Usage
On-Peak 264,251.04 23,23,13,3856
Mid-Peak 199,201.21 17,18,(2,00)(0,16)8757
Off-Peak 651,633,58,58.4%17,0.44 6592
August Usage 115,086,100,100,29.48 0.45 I 6536
Summer Usage: June - August
On-Peak 711,658,21.7%20,53,1.33 1849
Mid-Peak 559,551.47 17,16,7777
Off-Peak 007,055,61.2%63,(48,71)0.17 8652
Summer 05 Usage 278,265.45 100,100,12,6569
Table Ex 1- Time-Or-Day Summary Results
Table Ex 2 presents a comparison of customer bills developed for the test group and control
group participants under Rate Schedule! 1 (Standard) and Rate Schedule 5 (TOD). The table
presents the mean and median bills for each group. For both groups, the average time-of-day bill
is slightly lower than the standard residential bill. However, if we compare the control group
under the standard bill and the time-of-day group under the TOD bill we see that the time-of-day
! A summary table of the rates is provided as a technical appendix to this report.
RL W Analytics Page 2
Residential Time-of-Day
Energy Watch Evaluations
group saved $10.57 for the three-month period. This is a reduction of 4.7% from the standard
residential rate.
TOD Control Group Sample n=420 Customers
June July August June Through August
TaD Standard TOD Standard TOD Standard TOD Standard Difference
Statistic Rates Rates Rates Rates Rates Rates Rates Rates TOD-STd
Mean $61.69 $62,$82,$84,$75,$76.43 $219,$224.07 ($4,53)
Median $55,$56,$73,$74,$68,$68,$195.$197,($0,03)
Test Group Sample n=90 Customers
June July August June Through August
TaD Standard TOD Standard TOD Standard TaD Standard Difference
Statistic Rates Rates Rates Rates Rates Rates Rates Rates TOD-STd
Mean $59,$60,$81.27 $83,$73,$74.45 $213,$218,($4,88)
Median $53.48 $53,$74.$76,$64,$66,$194,$197,($2,78)
Control Group Sample n=420 Customers and Test Group n=90 Customers
June July August June Through August
Test Control Test Control Test Control Test Control Difference
Statistic TOD Rate Std Rate TOD Rate Std Rate TaD Rate Std Rate TOD Rate Std Rate TaD-Std
Mean $59,$62,$81.$84,$73,$76.43 $213,$224,($10,57)
Table Ex 2 - Time-of-Day Bill Comparisons
Summary of Results: Energy Watch Pilot
Energy Watch is a critical peak pricing pilot program with 76 participants2 under which the
participants receive notification the day before a critical peak event is called. A total of ten Energy
Watch days per year can be called between the dates of June 15th and August 15 . The critical peak
events have the following characteristics:
Critical peak price (CPP) hours are from 5pm to 9pm
All customers subject to CPP hours are provided day ahead notification
CPP energy price is $0.20 per kWh
Non-CPP energy price is $0.054280 per kWh
During 2005, a total of nine Energy Watch events were called. The Energy Watch impact
evaluation utilized interval load data available for the test group participants and for a large matched
control group. The Energy Watch participants showed dramatic reductions during the critical peak
pricing events, Figure Ex 2 presents the average of all nine event days for the test group (red line)
and control group (blue line). In aggregate, the maximum average load reduction per customer of
1.42 kW occurs at hour ending 7pm with the average load reduction calculated as 1.33 kW. The
total savings during the curtailment period is estimated to be 5.31 kWh per customer. The
morning increase on the curtailment days is very evident from the figure and averages less than 1
kWh.
2 The analysis was conducted using 74 of the 76 Energy Watch participants.
RL W Analytics Page 3
Residential Time-of-Day
Energy Watch Evaluations
Table Ex 3 presents a summary of the nine Energy Watch event days. As indicated, substantial
load is reduced by the Energy Watch participants during the critical peak pricing events on every
single event day. The maximum hourly load reduction per participant was 1.58 kW which
occurred on August 09, 2005 at hour ending 8pm. The average hourly demand reduction was
fairly consistent ranging from a low of 1.14 kW on August 11 , 2005 to a high of 1.49 kW on
August 9, 2005.
Average of All Event Days
1.B
1,4
1.2
1.0
01,00
I Average of All Event Days I
Event
Period
04,00 07,00 10,00 13,00 16,00 19,00 ",00
Local Time
J: Control Group, Mean, EWP
C: EWP Test Group, Mean, EWP
Figure Ex 2 - Energy Watch Program - Average Impacts
Hour Hour Event Day Reductions (kW)
BegInning Ending 07-Jul Jul 15-Jul 21-Jul 27-Jul 29-Jul 04-Aug 09-Aug ll-Aug Average
5pm 6pm 1.17 1.38 1.23 1.38 1.03 1.26 1.39 1.50 1.07 1.27
6pm 7pm 1.46 1.52 1.30 1.47 1.35 1.36 1.53 1.44 1.32 1.42
7pm 8pm 1.46 1.42 1.28 1.33 1.34 1.29 1.47 1.58 1.17 1.37
8pm 9pm 1.33 1.33 1.31 1.17 1.27 1.10 1.37 1.43 1.01 1.26
Four-Hour Total 5.42
Average Hourly 1.36 1.41 1.28 1.34 1.25 1.25 1.44 1.49 1.14 1.33
Minimum Temp
Maximum Temp 104 106 101
Average Temp
Table Ex 3 - Energy Watch Program Summary
Table Ex 4 presents a comparison of customer bills developed for the Energy Watch test group
and control group under Rate Schedule I (Standard) and Rate Schedule 4 (EW). The table
presents the mean and median bills for each group. For both groups, the Energy Watch bill is
slightly lower than the standard residential bill. This is an indication that applying this rate to the
larger group results in customer savings without associated action. However, the Energy Watch
group was successful in saving substantially more (over 2.5 times) than their control group
counterparts. Comparing the Energy Watch participant bills to the control group standard bills
result in a savings of $22.26 for the three summer months. This is a 9.5% reduction from the
average standard bill.
RL Analytics Page 4
Residential Time-of-Day
Energy Watch Evaluations
EW Control Group Sample n=357 Customers
June July August June Through August
Standard Standard Standard Standard Difference
Statistic Rates Rates Rates Rates Rates Rates Rates Rates EWP-Std
Mean $60,$65,$90,$89,$78,$79,$229,$234,($4,04)
Median $53,$57,$82,$80,$72.38 $74,$211.02 $214,($2,23)
Test Group Sample n=74 Customers
June July August June Through August
Standard Standard Standard Standard Difference
Statistic Rates Rates Rates Rates Rates Rates Rates Rates EWP-Std
Mean $59,$64,$80,$83,$71.25 $74,$211.76 $222,($10.46)
Median $52,$55,$75,$78,$69,$73,$208,$219,($9,00)
Control Group Sample n=357 and Test Group Sample n=74 Customers
June July August June Through August
Test Control Test Control Test Control Test Control Difference
StatIstic EW Rate Std Rate EW Rate Std Rate EW Rate Std Rate EW Rate Std Rate EW-Std
Mean $59,$65,$80,$89,$71.25 $79,$211.76 $234,($22,26)
Table Ex 4 - Energy Watch Bill Comparisons
RL Analytics Page 5
Idaho Power Company
Residential Time-at-Day and
Energy Watch Pilot Program Analysis
Final Report
INTRODUCTION
Pilot Programs
The Time-of-Day (TaD) and Energy Watch (EW) Pilot Programs are the result of the Advanced
Meter Reading (AMR) Phase One Implementation Plan filed with the Idaho Public Utilities
Commission (IPUC) in December 2003. In compliance with the IPUC Order No. 29362 issued
October 24, 2003, Idaho Power Company (IPCO) filed the Advanced Meter Reading (AMR) Phase
One Implementation Plan and committed to "investigate and file with the Commission load control
and time-of-use pricing projects that utilize the AMR technology." The resulting programs were
the Time-of-Day and the Energy Watch pilot programs which were aimed at testing reducing
residential summer peak loads in the Emmett area by using time-variant pricing. Both pilot
programs were approved by the IPUC on March 22, 2005. The programs will be in effect from
June 1 to April 2006. The goal of both of these programs was to test the ability of the AMR
system to enable IPCo to offer time-variant programs and to ascertain the ability of these programs
to reduce peak loads during the summer months. Offering these programs allows Idaho Power to
design, test, and implement program marketing plans, internal company processes, and workflow
procedures. These programs were offered only to residential customers in the Emmett area.
Time-of-Day is a conventional time-of-use energy program in which participants are charged
differing electricity rates for the following times and days of the weeks:
On-peak ($0.068686): Weekdays from Ipm to 9pm
Mid-peak ($0.061717): Weekdays from 7am to Ipm
Off-Peak ($0.053004): Weekdays from 9pm - 7am, and all hours weekends and holidays
The time-of-day pilot program analysis is based on data available for 90 ofthe 92 participants as of
August 2005.
Energy Watch is a critical peak pricing pilot program with 76 participants under which the
participants receive notification the day before a critical peak event is called. The analysis was
based on data received on 74 of the 76 program participants. A total of ten Energy Watch days per
year can be called between the dates of June 15th and August 15 . The critical peak events have the
following characteristics:
Critical peak price (CPP) hours are from 5pm to 9pm
All customers subject to CPP hours are provided day ahead notification
CPP energy price is $0.20 per kWh
Non-CPP energy price is $0.054280 per kWh
A third program that promoted air conditioner cycling, not subject to this analysis, was marketed
to the same set of customers. A total of 160 cycling customers from the Emmett area were signed
up for the cycling program during the recruitment period.
RL Analytics Page 6
Residential Time-of-Day
Energy Watch Evaluations
Project Objectives
The primary goal of both programs is to test the effectiveness of time-variant programs in
reducing peak summer loads. The evaluations are designed to analyze the impact of these
programs on participants' loads , energy consumption, and on customer bills. In particular, the
following variables are in play:
1. Demand reduction at the IPCa summer system peak period;
2. Energy conservation impacts across the summer season;
3. Change in energy use between the on-peak, mid-peak and off-peak periods;
4. Reduction in energy use during critical peak periods;
5. Temperature impacts on peak load reduction; and
6, Customer bill impacts.
Data Availability
The two pilot programs that require evaluation are aimed at reducing summer peak loads in the
Emmett area. This area includes approximately 6 000 residential meter service points.
Effectively, interval load data are available for all residential end users in the Emmett operating
area beginning in May, 2004. The data are being collected using the Company s TW ACS(!j) and
Itron s EE Meter Data Management System (MDMS). There were some issues encountered over
the quality ofthe 2004 data, however, the 2005 data was found to be of high quality,
4 Program Marketing and Recruitment
All customers in the Emmett area were subject to the program marketing. The pilot programs
received relatively modest acceptance with just 97 (1.6%) time-of-day and 80 0.3%) Energy
Watch participants recruited from a population of over 6 000 eligible participants. However
there were additional customers recruited into the Company s direct load control program during
the recruitment.
Temperature Data
Figure 1 presents the hourly temperature data available from the Boise weather station from June
2004 through August 31 2005. The figure displays a conventional two-dimensional rendition
of the hourly temperature (i.e., time on the x-axis and temperature on the y-axis) along with an
EnergyPrint at the bottom of the figure. The EnergyPrint displays the temperature in three
dimensions. For the horizontal EnergyPrint, time is represented on the y-axis, the day of the year
is represented on the x-axis and the hourly temperature is presented as a color gradient with low
temperatures in the black-blue spectrum and high temperatures in the yellow-white spectrum.
RL W Analytics Page 7
Residential Time-of-Day
Energy Watch Evaluations
Hourly Temperature
2004 2005
110
J"'04 S'p04 ",,04 Jao05 M,,05 May 05 J"'05 S'p05
Local Time
"__,
T___T....,,
., 0 J... J,' ... Sop Oct No, Coo Jr ... .... ... \by J.... J" ...
.1'
I~.ji " , I ~ i i
Figure 1 - Hourly Temperature Data
PCO System Load
2000
M"",J,I"Sop 04 MMOS M"OS JoIOS
Loc., Time
""'. ,
IKW 0 J" ,..
....
PCO uwStem- load, "
I ~I;'_~j I II~
... \lay J.... J" ... Sop Oct ..., Dee J., ... .... ... \lay ...... JoJ
Figure 2 - IPCO System Load
RL W Analytics Page 8
Residential Time-of-Day
Energy Watch Evaluations
IPCO System Load Data
Figure 2 presents a graphical representation of the IPCa system load, The load is clearly summer
sensitive with the highest loads occurring between mid-June and mid-September. Similar to
Figure the figure displays a conventional two-dimensional rendition of the load (i., time on
the x-axis and magnitude of load on the y-axis) along with an EnergyPrint at the bottom of the
figure. For the horizontal EnergyPrint, time is represented on the y-axis , the day of the year is
represented on the x-axis and the load is presented as a color gradient with low levels of load in
the black-blue spectrum and high levels of load in the yellow-white spectrum. The EnergyPrint
shows an interesting overview of the data for the period January 1 , 2004 through July 31 , 2005.
Table 1 presents selected demand and energy characteristics for the IPCa system peak. The table
presents the monthly energy use, timing of the system peak demand, the system peak demand and
the load factor. Summary statistics are provided for calendar year 2004 and 12-months ending
July 31 , 2005. In 2005, the IPCa system peaked at a demand of 2 961 MW on Friday, July 22
at hour ending 4pm. In contrast the non-summer peak reached a demand of 2 196 MW and
occurred on Thursday, January 5 2004 at hour ending 5pm.
Monthly Peak Load
Energy Use System Load, IPCO, MW Demand Faetor
Month (MWh)Maximum At (MW)
(%)
Jan-262 021 Mon Jan 5, 2004 7:00PM 196 77.2%
Feb-118 448 Fri Feb 13, 2004 8:00AM 072 77.6%
Mar-024 024 Wed Mar 3.2004 8:00AM 877 73,
Apr-035 756 Fri Apr 16 2004 9:00AM 1.758 81.8%
May-1,191 052 Tue May 4 2004 7:00PM 109 75,
Jun-1,435 560 Thu Jun 24. 2004 5:00PM 843 70,
Jul-588 613 Wed Ju114, 2004 6:00PM 825 75,
Aug-1,462 721 Mon Aug 2. 2004 6:00PM 792 70.4%
Sep-171 774 Wed Sep 1 2004 5:00PM 395 68,
Oet-072,443 Mon Oct 25, 2004 8:00AM 735 83,
Nov-095 064 Tue Nov 30, 2004 8:00AM 063 73.
Dee-223,245 Mon Dee 20, 2004 7:00PM 033 80,
Jan-235 913 Wed Jan 5 , 2005 7:00PM 063 80.5%
Feb-057,128 Thu Feb 17,2005 8:00AM 072 75.
Mar-054,495 Tue Mar I , 2005 8:00AM 812 78,
Apr-001 399 Thu Apr 14, 2005 8:00AM 796 77.4%
May-018 004 Sat May 28, 2005 6:00PM 863 73,
Jun-272 357 Tue Jun 21 , 2005 4:00PM 622 67,
Jul-641 727 Fri Jul 22. 2005 4:00PM 961 74,
Jan-Dee 04 680 721 Thu Jun 24, 2004 5:00PM 843 58,
12-Mths Jul 05 306,270 Fri Ju122, 2005 4:00PM 961 55.2%
Table 1 - IPCO System Peak Information
Figure 3 presents graphs of the non-summer and summer system peaks. The non summer peak is
bimodal with early morning and early evening peaks of similar magnitude. The summer system
peak shows a substantial amount of summer afternoon load.
RL W Analytics Page 9
Residential Time-of-Day
Energy Watch Evaluations
System Peaks
Non-Summer Peak Day Summer Peak Day
M"...y"."""'"'
"""
Frl'.y'"'y",
"'"'"""'"""'"
Local TIme LocalTIme
Figure 3 - Non-Summer versus Summer System Peaks
TIME-OF-DAY (TOD) PILOT EVALUATION
In this section we examine the impact evaluation of the Time-of-Day Pilot program. Time-of-Day
is a conventional time-of-use energy program in which participants are charged differing electricity
rates for the following times and days of the week:
On-peak ($0.068686): Weekdays from lpm to 9pm
Mid-peak ($0.061717): Weekdays from 7am to Ipm
Off-Peak ($0,053004): Weekdays from 9pm - 7am, weekends and holidays
The time-of-day impact evaluation uses hourly interval load data in a test-control experimental
design. The test group is comprised of 90 Emmett area customers recruited into the time-of-day
pilot program. The control group was developed by statistically selecting customers that were
similar to the pilot participants based on their summer 2004 hourly load.
TOD Pilot Program Participants
A total of 90 pilot program participants were available for use in the Time-of-Day Pilot
Evaluation. A simple average was constructed for the pilot program participants and is displayed
in Figure 4. The light blue areas in the EnergyPrints are indicative of data unavailable due to
problems with the AMR data collection network. The majority of the data challenges occurred in
2004 with the best data available for the June 1 , 2005 through August 31 , 2005 summer period.
The average demand ranged from a low of 0.58 kW to a high of 3.93 kW. The average peak
demand for the TaD program participants occurred on Friday, December 24, 2004 at hour ending
9am.
RL W Analytics Page 10
Residential Time-of-Day
Energy Watch Evaluations
~o Residential TOO - Average Demand
.:r"
. . " "
OopOO
",y"
00",
Local TIme
Figure 4 - Residential TOD Average Demand
Table 2 presents summary information for the residential TOD participants for the 2005 summer
period. The average peak demand is estimated to be 2.91 kW and occurred on Sunday, July 31
2005 at hour ending 7pm. The average summer energy usage is estimated to be 3 181 kWh
yielding a summer load factor of 49.5%.
Monthly Peak Load
Use Demand Factor
Month (kWh)Peak Occurred at (kW)
(%)
Jun-852 Wed Jun 22, 2005 8:00PM 53,
Jul-195 Sun Jul 31, 2005 7:00PM 55,
Aug-135 Mon Aug 22, 2005 6:00PM 55,
Summer 05 181 Sun Ju131, 2005 7:00PM 49,
Table 2 - Average Demand and Energy Usage Characteristics
Figure 5 displays the average load during the 2005 summer period.
RL W Analytics Page II
Residential Time-of-Day
Energy Watch Evaluations
Residential TOO
Summer Period: June 1 through August 31 2005
Average Demand
,~--
...,ro
"""
Local Time
Figure 5 - Residential TOD Summer Load
2 TOD Control Group Participants
To analyze the impacts of the time-of-day rate, a control group was selected from the general
population pool of Emmett customers. The control group was determined by examining the
correlation between the pilot program participants and customers in the control group pool during
the summer or 2004. A control group of five "similar" customers was selected for each pilot
program participant. Figure 6 presents the average load developed for the TaD control group.
Consistent with the TaD test group, the control group shows some data challenges associated
with the summer and early Fall 2004 periods. The maximum demand for the control group, 3.43
, also occurred in the winter on Wednesday, January 5 , 2005 at 7pm.
Coo"""", Iroc
"'" '-
~~i
, . " " "I
! 30
TOO Control Group
~II'
J"1O4 Sop"NO'"Mw05 Mo,05 '" 05
Local Time
Figure 6 - TOD Control Group
RL W Analytics Page 12
Residential Time-of-Day
Energy Watch Evaluations
Figure 7 and Figure 8 present selected comparisons for the TOD test group with the TOD control
group. Please note, the early June period was eliminated due to scarcity of data. As evidenced by
the figures, the control group does a good job of tracking the load of the TOD test group
particularly during the 2004 summer class peak. period.
Residential TOO
Summer Period: June 16 through August 31 , 2004
Control Group Comparison
Joo 29 J,,113 J"127 A"910 A",24
Local Time
H: Control Group, Mean , TaD
B: TOO Test Group, Mean. TOO
Figure 7 - Pre Period Comparison
Residential TOO
Summer Class Peak Period: 2004
Control Group Comparison
August 2004
J"127 A",03 A"9'0
Locai Time
H: Control Group, Mean. TOD
B: TOD Test Group, Mean. TOO
Figure 8 - 2004 Summer Class Peak Comparison
RL Analytics Page 13
Residential Time-of-Day
Energy Watch Evaluations
Figure 9 and Figure 10 highlight how well the control group matches the test group by presenting
average weekdays and weekend days for June, July and August. The control group and test group
lines mirror one another.
Average Weekday Comparison - 2004
Jun.July Augu.,
00,00 ",00 18,00 00.00 ",00 18,00 0000
H: Control Group, Mean, TOD
B: TOD Test Group, Mean, TOD
Figure 9 - Pre-Period Average Weekday Comparisons
Average Weekend Comparison - 2004
Jun.July Augu.'
00,00 0000 0000 0000
H: Control Group, Mean, TOD
B: TOD Test Group, Mean, TOD
Figure 10 - Pre-Period Average Weekend Day Comparisons
Table 3 presents a comparison of the 2004 pre-period consumption per customer for the control
group and test group by time-of-use periods. Please note, regression techniques were used to
model load for the 2004 missing periods to yield a full complement of data for analysis. The
control group used an estimated 3 331 kWh during the summer compared to 3 371 kWh for the
test group. The difference of 40 kWh was within 1.2%. The percentage of usage on peak was
identical, i., 30., for both the control and test groups. The control group peaked at 2.97 kW
during off peak compared to 3.06 kW for the test group.
RL W Analytics Page 14
Residential Time-of-Day
Energy Watch Evaluations
Summer 2004 kWh
Summer 2004 % of Total
Summer 2004 kW
Summer 2004 Load Factor
Off Peak Mid Peak
All Other Wkdays:Measure Hours 7am-l m
TOD Control Grou
754,
52,
46,01%
TaD Test GrouSummer 2004 kWh 1 760.4 582,
Summer 2004 % of Total 52,2% 17,Summer 2004 kW 3,06 2.40
Summer 2004 Load Factor 41.12% 55,76%
Differences (TOD Test - TOD Control)
21.13% 3,5% -0.4%89% 11.47%
Period
561.7 1 014,9 3 331.1
16,9% 30,5% 100%11 2,90 2,
67,23% 66,28% 50,
028,1 3 371.2
30,5% 100%98 3,
59,2% 49,
Summer 2004 kWh
Summer 2004 % Difference
Summer 2004 % of Total Difference
Summer 2004 Delta Load Factor
13,
1.3%
12%
Table 3 - 2004 Pre Period Consumption Comparison
Given these results, we were confident that the control group provided a reasonable basis for
analyzing the test group under the test-control experimental design.
2005 Time-of-Day Results
This section presents the findings associated with the Time-of-Day program impact evaluation.
3.3.Average Weekday and Weekend Day Comparisons
Figure 11 and Figure 12 present the average weekday and weekend day comparisons for the
control and test groups. Unlike the 2004 graphs, the 2005 average weekday graphs show a load
reduction during the afternoon and early evening periods. Recall the on-peak period was defined
as weekdays between Ipm and 9pm with mid-peak defined as weekdays between 7am and Ipm.
All other hours were off-peak. While the June 2005 weekend graph shows some load reduction
the July and August weekend graphs show nearly identical loads.
RL W Analytics Page 15
Residential Time-of-Day
Energy Watch Evaluations
Average Weekday Comparison - 2005
June July August
12,00 0000 IS,oo 0000
H: Control Group, Mean, TOO
B: TOD Test Group, Mean, TOD
Figure 11 - 2005 Average Weekday Comparisons
Average Weekend Comparison - 2005
Juns July August
00,00 0000
H: Control Group, Mean, TOO
B: TOD Test Group, Mean, TOD
Figure 12 - 2005 Average Weekend Comparisons
3.3.Monthly and Seasonal Energy Use
To test the significance of the load reduction, we calculated the monthly and seasonal energy use
per period. These are presented in Table 4. The table presents the on-peak, mid-peak and off-
peak energy usage by month and season for the control and test groups along with the percentage
of use in each period and the overall difference. For July, the control group averages
approximately 1 248 kWh with 265 kWh consumed during the on-peak, 184 kWh in the mid-peak
and 799 kWh in the off-peak. fu contrast, the time-of-day group averages approximately 1 294
kWh with 239 kWh consumed during the on-peak, 178 kWh during the mid-peak and 876 kWh
. during the off-peak. The percentage of on-peak use for the control group was 21.2% compared to
18.5% for the time-of-day group.
RL W Analytics Page 16
Residential Time-of-Day
Energy Watch Evaluations
Average Use (kWh)Percent of Total Use
Control TOD Test Control TOD Test Control-TaD
Period (n=420)(n=90)(n=420)(n=90)Difference
June Usa e
On-Peak 181.79 167.19,19,13.
Mid-Peak 175.171.90 19,19.4%
Off-Peak 556,545,60,61.6%11.06
June Usage 914,885,100,100,28,
Julv Usaoe
On-Peak 265,239,21.2%18.25,
Mid-Peak 184,178.36 14,13,
Off-Peak 798,876,64,67,(77.48)
Julv Usage 248,293,100,100,(45,68)
August Usage
On-Peak 264,251.04 23,23,13.
Mid-Peak 199,201.21 17,18,(2,00)
Off-Peak 651.50 633,58.4%58.4%17,
gust Usa 115,086.100,100,29.48
Summer Usage: June - August
On-Peak 711.65 658,21.7%20,53,
Mid-Peak 559.30 551.47 17,16,
Off-Peak 007.14 055,61.2%63,(48,71)
Summer 05 Usa!!e 278,265.45 100,100,12,
Table 4 - 2005 Time-of-Day Usage Comparisons
To test the significance of the various numbers presented in Table 4, we set up a statistical T -test
to examine the null hypothesis that the various sets of numbers between the control group and the
test group are statistically the same, In the lexicon of statistics, the null hypothesis is that the
control group and test group means are equal (i., H : flcontrol = /ltest) and the alternative hypothesis
is that the control group is not equal to the test group (i.e., Ha: flcontrol'# /ltest
Average Use (kWh) I Percent of Total Use I
Control TOO Test Control TOO Test Control-TOO
Period (n=420)(n=90)(n=420)(n=90)Difference Value PR;,.ITI
June Usage
On-Peak 181.79 167,19,19,13.1.30 1960
Mid-Peak 175,171.90 19,19.4%7208
Off-Peak 556.545.60,61.6%11.06 7461
June Usa!!e 914.885,100,100,28,5956
Julv Usa!!e
On-Peak 265,239.21.2%18,25.1.55 1224
Mid-Peak 184.178,14,13,6177
Off-Peak 798,876,64,67,(77.48)(0.28)7774
Julv Usa!!e 1.248,1.293.100,100.(45.68)8231
Au!!ust Usa!!e
On-Peak 264,251.04 23,23,13. 77 3856
Mid-Peak 199.201.21 17.18.(2,00)(0,16)8757
Off-Peak 651.50 633.58.4%58.4%17.0.44 6592
Au!!ust Usa!!e 1.115.086,100.100,29.48 0.45 6536
Summer Usa!!e: June - Au!!ust
On-Peak 711.65 658,21.7%20.53,1.33 1849
Mid-Peak 559.30 551.47 17.16,0.28 7777
Off-Peak 007.055,61.2%63,(48,71)8652
Summer 05 Usage 278.265.45 100,100.12,0.45 6569
Table 5 - T - Test Analysis Results
Table 5 presents the results of the T-test analysis and includes the T-Value and the probability of
getting a larger T-Value (i., PR;::.ITI). For all three months and the summer season, the null
hypothesis cannot be rejected for any period indicating that there was not a statistical change in
the usage of the time-of-day participants when compared to the control group. However, there
RL Analytics Page 17
Residential Time-of-Day
Energy Watch Evaluations
was some indication that there was some reduction of load during the on-peak periods and an
increase in off-peak periods, particularly for July and the overall summer season. For the on-peak
period, the probability of getting a higher T -value is 0.1849 for the 2005 summer season
providing some indication that the reduction of 54 kWh is statistically significant at the 80%
level.
3.3 System Peak Demand Reduction
Figure 13 presents the test and control groups on the summer system peak day, Friday, July 22
2005 at hour ending 4pm. The control group displays a peak that is approximately 0.24 kW
higher than the test group. The T-statistic associated with this demand is 1.26 with a p-value of
2084 indicating that the difference is not significant at the 90% level.
pca System Peak Day
Friday, July 22 2005 at Hour Ending 4pm
""oyJ"ly22,2005
IPCO System Peak
7/22/05 iiY 4pm
Control Group: 2,70 kW
Test Greup: 2.46 kW
Difference: 0,24 kW
Stat: 1,
p-value=O,2084
Cannot Reject H
0100 0700 13,00 19,00
Local Time
Figure 13 - System Peak Reduction
3.4 Bill Comparisons
Table 6 presents a summary of the bill3 analysis conducted for the evaluation. The table presents
the standard residential bill versus the time-of-day bill for the time-of-day control group and the
test group. The table presents the analysis results monthly and in aggregate for the summer 2005
period June through August. The table presents the mean bill along with select statistics
associated with the distribution of bills, e., the 10th percentile, the 151 quartile, the median, the 3rd
quartile, and the 90th percentile. In addition, the average difference and the distribution statistics
of the difference are presented. For the time-of-day control group customers the mean summer
season bill was $224.07 under the standard rate. If these customers would have been billed
under the time-of-day rate their bill would have decreased $4.52 to $219.54. At most points
along the distribution the time-of-day bill was slightly lower than the standard bill. This indicates
that there would be some free riders associated with the current time-of-day offering but the
customers would not save very much money (i,e., a savings of $1.51 per month or approximately
2%).
3 The customer bills were calculated based on the service charge, the energy charge and the power cost
adjustment. A summary table of the rates is provided as a technical appendix to this report.
RL W Analytics Page 18
Residential Time-of-Day
Energy Watch Evaluations
TaD Control Group Sample n=420 Customers
June July August June Through August
TaD Standard TaD Standard TaD Standard TaD Standard Difference
Statistic Rates Rates Rates Rates Rates Rates Rates Rates TaD-Std
Mean $61.69 $62,$82,$84,$75,$76.43 $219,$224,($4,52)
10th Percentile $30,$29,$37,$37,$35,$34,$107,$107,$1.61
1st Quartile $39,$39,$53,$54,$48,$48.40 $145,$146,($0,03)
Median $55,$56,$73,$74,$68,$68,$195,$197,($3,04)
3rd Quartile $79,$79,$102,$106,$94,$96,$274,$282,($7,57)
90th Percentile $98,$102,$142,$148,$126.48 $128,$366,$378,($12,55)
Test Group Sample n=90 Customers
June July August June Through August
TaD Standard TaD Standard TaD Standard TaD Standard Difference
Statistic Rates Rates Rates Rates Rates Rates Rates Rates TaD-Std
Mean $59,$60,$81.27 $83,$73.15 $74.45 $213,$218,($4,88)
10th Percentile $30,$30,$35,$36,$34,$34,$106,$106,$0,
1st Quartile $40.42 $39,$55,$56,$48,$48,$147,$150,($0,51)
Median $53.48 $53,$74,$76,$64,$66,$194,$197,($2,78)
3rd Quartile $72.08 $73,$99,$103,$93,$96,$261.90 $267,($7,90)
90th Percentile $102.45 $105,$129,$134,$117,$123,$339,$355.48 ($14,36)
Control Group Sample n=420 Customers and Test Group n=90 Customers
June July August June Through August
Test Control Test Control Test Control Test Control Difference
Statistic TaD Rate Std Rate TaD Rate Std Rate TaD Rate Std Rate TaD Rate Std Rate TaD-Std
Mean $59,$62,$81.27 $84,$73.15 $76.43 $213,$224,($10,57)
Table 6 - Time-of-Day Bill Comparisons
Examining the test group sample of customers, the average time-of-day bill was $214.80. If these
customers would have been billed under the standard rate then the average summer seasonal bill
would have been $219.67 or $4.87 more than the time-of-day bill. The last portion of the table
contrasts the control group customer s average bill under the standard rate versus the test group
customer s average bill under the time-of-day rate. Under this scenario, the time-of-day customer
saves approximately $10.60 (or 4.7%) for the entire summer season.
ENERGY WATCH PILOT (EW) EVALUATION
In this section we examine the impact evaluation of the Energy Watch Pilot program. Energy
Watch is a critical peak pricing pilot program where the participants receive notification the day
before a critical peak event is called, A total of ten Energy Watch days, or critical peak events, per
year can be called between the dates of June 15th and August 15 . The critical peak events have the
following characteristics:
Critical peak price (CPP) hours are from Spm to 9pm
All customers subject to CPP hours are provided day ahead notification
CPP energy price is $0.20 per kWh
Non-CPP energy price is $0.054280 per kWh
The Energy Watch impact evaluation uses hourly interval load data in a test-control experimental
design. The test group is comprised of 74 of the 76 Emmett area customers in the Energy Watch
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pilot program as of August 2005. The control group was developed by statistically selecting
customers that were similar to the pilot participants based on their summer 2004 hourly load.
Critical Peak Pricing Events
During 2005, a total of nine events were called. Table 7 presents the dates, the beginning and
ending of the CPP period and selected temperature statistics for the day.
CPP Period Temperatures o
Event Day Begin End Minimum Maximum Average Time of Max
Thursday, July 07, 2005 5pm 9pm 6pm
Wednesday, July 13,2005 5pm 9pm 4pm
Friday, July 15,2005 5pm 9pm 104 7pm
Thursday, July 21 , 2005 5pm 9pm 106 4pm
Wednesday, July 27, 2005 5pm 9pm 6pm
Friday, July 29, 2005 5pm 9pm 4pm
Thursday, August 04, 2005 5pm 9pm 101 6pm
Tuesday, August 09 2005 5pm 9pm 4pm
Thursday, August 11,2005 5pm 9pm 6pm
Table 7 - Critical Peak Pricing Event Days
Energy Watch Pilot Program Participants
A total of 74 pilot program participants were available for use in the Energy Watch Pilot
Evaluation. A simple average was constructed for the pilot program participants and is displayed
in Figure 14. The light blue areas in the EnergyPrints are indicative of data unavailable due to
problems with the AMR data collection network. The majority of the data challenges occurred in
2004 with complete data available for the June 1 2005 through August 31 2005 summer period.
The average demand ranged from a low of 0.35 kW to a high of 3.73 kW. The residential TOD
peak demand occurred on Saturday, January 15 2005 at hour ending 9am.
'n""""
"""~'"
0 . " " "
Energy Watch Pilot Evaluation
2004 . 2005
J"'04 8",04 "",04 J",,05 M,,05 May 05 J,,105 8",05
Local Time
Figure 14 - Energy Watch Pilot Participants
Table 8 presents a listing of the Energy Watch days. Included in the table are the beginning and
ending times and selected temperature characteristics associated with the event day. Six events
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were called in July and three events were called in August. It is important to note that the
summer system peak day, Friday, July 22, 2005 was not included in the events.
CPP Period Temperatures o
Event Day Begin End Minimum Maximum Average Time of Max
Thursday, July 07, 2005 5pm 9pm 6pm
Wednesday, July 13,2005 5pm 9pm 4pm
Friday, July 15,2005 5pm 9pm 104 7pm
Thursday, July 21 , 2005 5pm 9pm 106 4pm
Wednesday, July 27, 2005 5pm 9pm 6pm
Friday, July 29, 2005 5pm 9pm 4pm
Thursday, August 04, 2005 5pm 9pm 101 6pm
Tuesday, August 09,2005 5pm 9pm 4pm
Thursday, August 11 , 2005 5pm 9pm 6pm
Table 8 - Energy W atch ~ays
Figure 15 presents a composite graph of each event day along with the maximum temperature for
the day. The figure shows a substantial reduction in load during the critical peak pricing period
on each event day. The challenge is selecting an appropriate customer baseline for use in the
comparison. For the Energy Watch Pilot evaluation, a control group was developed similar to the
one created for the Time-of-Day Pilot evaluation. Here again, the interval load data available for
the 6 000 Emmett area residences were used to match approximately five customers to each
individual Energy Watch Pilot participant based on the correlation of summer 2004 load.
Event Days
94OF 96OF lO4oF lO6OF 96OF 99"F lOl"F 97"F 90"F
2.4
1.6
1.0
July 7 July 13 July IS July 21 July 27 July 29 August 4 August 9 August 11
Local Time
Figure 15 - CPP Event Days
EW Control Group Participants
To analyze the impacts of the Energy Watch pilot, a control group was selected from the general
population pool of Emmett customers. The control group was determined by examining the
correlation between the pilot program participants and customers in the control group pool during
the summer or 2004. A control group of approximately five "similar" customers was selected for
each pilot program participant. Figure 16 presents the average load developed for the EW control
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group. Consistent with the EW test group, the control group shows some data challenges
associated with the summer and early Fall 2004 periods. The maximum diversified demand for
the control group, 3.23 kW, also occurred in the winter on Monday, November 29,2005 at hour
ending 8am.
Coo..,,-
=., Energy Watch Pilot - Control Group
'" ~~,, . " '. "
Sop 04 M~OS Me,OS
Local Time
Figure 16 - EW Control Group
Figure 17 and Figure 18 present selected comparisons for the EW test group with the EW control
group, As evidenced by the figures, the control group does a good job of tracking the load of the
EW test group particularly during the 2004 summer class peak period.
2004 Comparisons
'"""'
A"OW A"O"
Local Time
c: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 17 - Pre Period Comparison
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Summer 2004 Class Peak Period
for Energy Watch Control Group
'""""'~
~,' ro ,"m
"""
Loool Time
C: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 18 - 2004 Summer Class Peak Comparison
Figure 19 and Figure 20 highlight how well the control group matches the test group by
presenting average weekdays and weekend days for June, July and August. The control group
and test group lines mirror one another.
Average Weekday Comparisons 2004
June July August
'",00 00,00 0000 "00 ""00 '"00 0000
C: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 19 - Pre-Period Average Weekday Comparisons
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Average Weekend Comparisons - 2004
Jun.July '&gUSI
c: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 20 - Pre-Period Average Weekend Day Comparisons
Given these results, we were confident that the control group provided a reasonable basis for
analyzing the test group under the test-control experimental design.
2005 Energy Watch Pilot Results
The following sections examine the impacts associated with the Energy Watch Pilot program.
We begin by presenting summary information for all events followed by an examination of each
individual event day,
4.4.2005 Energy Watch Pilot Summary
Table 9 presents a summary of the nine Energy Watch days. Substantial load is reduced by the
Energy Watch participants during the critical peak pricing events. The maximum hourly load
reduction per participant was 1.58 kW which occurred on August 09, 2005 at hour ending 8pm.
The average hourly demand reduction was fairly consistent ranging from a low of 1.14 kW on
August 11 , 2005 to a high of 1.49 kW on August 9, 2005. The average load reduction for the
nine events was 1.33 kW. The average savings in the four hour event was approximately 5.
kWh.
Hour Hour Event Day Reductions (kW)
Beginning Ending 07-Ju!l3-Ju!15-Jul 21-Jul 27-Jul 29-Jul 04-Aug 09-Aug ll-Aug Average
5pm 6pm 1.17 1.38 1.23 1.38 1.03 1.26 1.39 1.50 1.07 1.27
6pm 7pm 1.46 1.52 1.30 1.47 1.35 1.36 1.53 1.44 1.32 1.42
7pm 8pm 1.46 1.42 1.28 1.33 1.34 1.29 1.47 1.58 1.17 1.37
8pm 9pm 1.33 1.33 1.31 1.17 1.27 1.10 1.37 1.43 1.01 1.26
Four-Hour Total 5.42
A verage Hourly 1.36 1.41 1.28 1.34 1.25 1.25 1.44 1.49 1.14 1.33
Minimum Temp
Maximum Temp 104 106 101
Average Temp
Table 9 - Energy Watch Pilot Summary
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4.4.Event Day: Thursday, July 2005
The first event was called on Thursday, July 7, 2005, The maximum outdoor temperature during
that day was 940F. Figure 21 presents the average hourly load for the test and control groups for
the week of the event. The control group maps very well with the test group.
Event Day: July 7 , 2005
July 2005
S",03 MooD'Tu,OS W,dOS Thu07 FriOB SalOB Suo
Local Time
J: Control Group, Mean, EWP
C: EWP Test Group, Mean, EWP
Figure 21- Energy Watch Pilot: Week of July 7, 2005
Figure 22 presents the event day analysis. During the event a substantial amount of load is
reduced from the critical peak pricing period. There is some indication that the test group shifted
load to the period prior to the critical peak pricing event. The average hourly load reduction
ranged from a low of 1.17 kW to a high of 1.46 kW, The average reduction across the four hour
period was 1.36 kW.
Event Day: July 7 2005
Test versus Control"
""";00
""""
"-,,,So""'"
Max Temp = 94oF
Thursday, Ju'y 07, 2005 5:00:00 PM to 9:00:00 PM
Figure 22 - Event Day Impacts: Thursday, July 7, 2005
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4.4.3 Event Days: Wednesday, July 2005 and Friday, July 2005
The second and third events were called the week of July 10, 2005. The maximum outdoor
temperature on two event days called that week was 93OF on Wednesday, July 13 , 2005 and
1O4OF on Friday, July 15, 2005. Figure 23 presents the average hourly load for the test and
control groups for the week of July 10, 2005. The control group maps very well with the test
group with the exception of the day prior to the first event in that week where the test group is
somewhat higher in the early afternoon period.
Event Day: July 13 and July 15, 2005
July 2005
Suo 10 M~11 Tu,'2 w"""Thu 14 ,,;15 S" 16 Soo 17
Lecal Time
c: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 23 - Energy Watch Pilot: Week of July 10 2005
Event Day: July 13, 2005
Test versus Control"
Max Temp = 93OF
""'0'0'Ad",Eo~gys.,'og'
0000 00,00 ",00 1500
Wednesday, July 13, 2005 5:00:00 PM to 9:00:00 PM
Figure 24 - Event Day Impacts: Wednesday, July 13,2005
Figure 24 and Figure 25 present the event day analyses for July 13, 2005 and July 15, 2005.
During both events a substantial amount of load is reduced from the critical peak pricing period.
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Here again, there is some indication that the test group shifted load to the period prior to the
critical peak pricing event. For Wednesday, July 13 2005 the load reduction ranged from a low of
1.33 kW to a high of 1.52 kW. The average reduction across the four hour period was 1.41 kW.
For Friday, July 15, 2005 the average hourly load reduction ranged from a low of 1.23 kW to a
high of 1.31 kW. The average load reduction for the four hour period was 1.28 kW.
Event Day: July 15, 2005
Test versus Control"
Max Temp = lO4OF
"""';oe
"'."
E"~gyS";"g'
2,"00 0000
Friday, July 15, 2005 5:00:00 PM to 9:00:00 PM
Figure 25 - Event Day Impacts: Friday, July 15 2005
4.4.4 Event Day: Thursday, July 2005
The fourth event of the season was called the week of July 17, 2005. The maximum outdoor
temperature on the Thursday, July 21, 2005 event day was 1O6OF. Figure 26 presents the average
hourly load for the test and control groups for the week of July 17 2005. The control group maps
very well with the test group with the exception of the day prior to the event where the test group
load is somewhat lower in the early afternoon period.
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Event Day: July 21 , 2005
July 2005
S"o17 Moo"T,e'9 Wed 20 Th'21 Fri"8"23 S"o24
Local Time
C: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 26 - Energy Watch Pilot: Week of July 17 2005
Figure 27 presents the event day analysis for Thursday, July 21, 2005. Once again, a substantial
amount of load is reduced during the critical peak pricing period. This is the first instance where
there is no evidence that the test group shifted load to the period prior to the critical peak pricing
event. The average hourly load reduction ranged from a low of 1.17 kW to a high of 1.47 kW.
The average reduction across the four hour period was 1.34 kW.
Event Day: July 21 , 2005
Test versus Control"
"""'00A","
Eo~gyS"'o",
Max Temp = lO6OF
2.4
06'09,00 21,00 00,00
Thursday, July 21, 2005 5:00:00 PM to 9:00:00 PM
Figure 27 - Event Day: Thursday, July 21, 2005
4.4.Event Day: Wednesday, July 2005 and Friday, July 2005
The fifth and sixth events of the season were called the week of July 24, 2005. The maximum
outdoor temperature on the first event day of that week, Wednesday, July 27, 2005 was 96OF and
99OF on the second event day of the week, Friday, July 29, 2005. Figure 28 presents the average
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hourly load for the test and control groups for the week of July 24, 2005. The control group maps
very well with the test group,
Event Day: July 27 and July 29, 2005
J.ly 2005
5.024 Moo2S T".26 Woo 2'Th028 ,,'29 5"30 5",31
Leealeme
C: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 28 - Energy Watch Pilot: Week of July 24, 2005
Figure 29 presents the event day analysis for Wednesday, July 24 2005. Once again, a substantial
amount of load is reduced during the critical peak pricing period. The evidence of load shifting to
the early morning period is once again evident. The load reduction during the critical peak period
ranged from a low of 1.03 kW to a high of 1.35 kW. The average reduction across the four hour
period was 1.25 kW.
Event Day: July 27 2005
Test versus Control"
"'0'",
""..,
"",,S'"'o'
Max Temp = 96"F
03,00 06,00 ",00
Wednesday, Ju'y 27, 2005 5:00:00 PM to 9:00:00 PM
Figure 29 - Event Day: Wednesday, July 27, 2005
Figure 30 presents the event day analysis for Friday, July 29, 2005. Consistent with all previous
CPP events, a substantial amount of load is reduced during the critical peak pricing period. The
evidence of load shifting to the late morning period is evident. The load reduction during the
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critical peak. period ranged from a low of 1.10 kW to a high of 1.36 kW. The average reduction
across the four hour period was 1.25 k W.
Event Day: July 29,2005
Test versus Control"
Max Temp = 99OF
8""",",Ad,",E"",.."",
Friday, July 29, 2005 5:00:00 PM to 9:00:00 PM
Figure 30 - Event Day: Friday, July 29, 2005
4.4.Event Day: Thursday, August 2005
The seventh event of the season was called the week of July 31, 2005. The maximum outdoor
temperature on the event day, Thursday, August 4, 2005 was 10 1 oF. Figure 31 presents the
average hourly load for the test and control groups for the week of July 31 , 2005, The control
group maps very well with the test group with the exception of the day after the event where the
test group load is somewhat lower in the early morning period.
Event Day: August 4, 2005
Augu./2005
Soo 31 Moo"T"'02 Woo 0'Th'04 "iDS S"06 S"o 07
Local Time
C: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 31- Energy Watch Pilot: Week of July 31, 2005
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Figure 32 presents the event day analysis for Thursday, August 4 2005. Once again, a substantial
amount of load is reduced during the critical peak pricing period. The average hourly load
reduction ranged from a low of 1.37 kW to a high of 1.53 kW. The average reduction across the
four hour period was 1.44 kW.
Event Day: August 4, 2005
Test versus Control"
2.-
Max Temp = lOlOF
-;"'"""
""gys..,;",
Thursday, August 04, 2005 5:00:00 PM to 9:00:00 PM
Figure 32 - Event Day: Thursday, August 4, 2005
4.4.Event Day: Tuesday, August 9 2005 and Thursday, August 11 2005
The eighth and ninth events of the season were called the week of August 7, 2005. The
maximum outdoor temperature on the first event day of that week, Tuesday, August 9, 2005 was
97OF and 90oF on the second event day of the week, Thursday, August 11, 2005. Figure 33
presents the average hourly load for the test and control groups for the week of August 7, 2005.
The control group maps very well with the test group.
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Event Day: August 9 and 11 , 2005
Augu", 2005
5",07 Moo 08 T",09 Wod1O Th. 11 F'i12 5'113 5", "
Local Time
c: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 33 - Energy Watch Pilot: Week of August 7, 2005
Figure 34 and Figure 35 present the event day analyses for Tuesday, August 9, 2005 and
Thursday, August 2005. During both events a substantial amount of load is reduced from the
critical peak pricing period. Here again, there is some indication that the test group shifted load to
the period prior to the critical peak pricing event. For Tuesday, August 9, 2005 the average hourly
load reduction ranged from a low of 1.43 kW to a high of 1.58 kW. The average reduction across
the four hour period was 1.49 kW. For Thursday, August 2005 the average hourly load
reduction ranged from a low of 1.01 kW to a high of 1.32 kW. The average load reduction for the
four hour period was 1.14 kW.
Event Day: August 9, 2005
Test versus Control"
Max Temp = 97OF
2.4
BMm'"Ad."E"~"s.,'""
0',00 0600
"'"
Tuesday, August 09, 2005 5:00:00 PM to 9:00:00 .
Figure 34 - Event Day: Tuesday, August 9, 2005
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Event Day: August 11 , 2005
Test versus Control"
:: Max Temp = 900F
"'"'0."to"Eo~gyS"iog,
2,"00
Thursday, August 11 20055:00:00 PM 10 9:00:00 PM
Figure 35 - Event Day: Thursday, August 11, 2005
4.4.Event Day Summary
Figure 36 summarizes the event days by presenting the test group and control group loads for
each day on a continuum. In addition to the hourly loads the maximum daily temperatures are
displayed. The peak load for the test group occurred during the day of highest temperature.
Event Days
94OF 96OF lO4OF lO6OF 96OF 99OF lOlOF 97OF 900F
July 7 July 13 July 15 July 21 July 27 July 29 August 4 August 9 August 11
Local Time
C: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 36 - Event Day Summary
Figure 37 presents the average EW reduction per participant plotted against temperature. The
plot suggests that the demand reduction does increase with temperature. A simple regression
equation was constructed using temperature as follows. The temperature variable was significant
with aT-value of 1.82 and a p-value of 0.078.
Reduction = 0.62738+0.000762*Temperature
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EW Reduction vs. Temperature
EW Demand Reduction vs, Temperature
500
I i' 1.400
~ 1,300 .
, .3 1,200
1.700
100 -
1.600
900 '
100 110 I
000
105
Temperature
Figure 37 - EW Reduction versus Temperature
Average of All Event Days
1.4
01,00
I Average of All Event Days I
04,00 07,00 10,00 13,00 16,00 19,00 22,00
Local Time
C: EW Test Group, EW, Mean
J: Control Group, EW, Mean
Figure 38 Average of All Event Days
Figure 38 presents the average of all event days into a single graph. The maximum average load
reduction of 1.42 kW occurred at hour ending 7pm with the average load reduction across all
hours was calculated as 1.33 kW. The total average savings during the Energy Watch period is
estimated to be 5.31 kWh. The Energy Watch participants display a slightly higher early morning
load. However, the morning increase during the Energy Watch event days averages less than
kWh which is just slightly higher than the 0.7 kWh increase associated with non event day hours.
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4.4.Energy Watch Bill Comparisons
Table 10 presents a summary of the bill4 analysis conducted for the evaluation. The table
presents the standard residential bill versus the Energy Watch bill for the Energy Watch control
group and the test group. The table presents the analysis results monthly and in aggregate for the
summer 2005 period June through August. The table presents the mean bill along with select
statistics associated with the distribution of bills , e., the 10th percentile, the 1 st quartile, the
median, the 3rd quartile, and the 90th percentile. In addition, the average difference and the
distribution statistics of the difference are presented. For the Energy Watch control group
customers the mean summer season bill was $234.02 under the standard rate. If these customers
would have been billed under the Energy Watch rate, their bill would have decreased an average
of $4.04 (or 1.7%) to $229.02.
EWP Control Group Sample n=357 Customers
June July August June Through August
Standard Standard Standard Standard Difference
Statistic Rates Rates Rates Rates Rates Rates Rates Rates EWP-Std
Mean $60,$65,$90,$89,$78,$79,$229,$234,($4,04)
10th Percentile $26,$27.47 $35,$34.44 $32,$32,$95,$93,$2,
1st Quartile $37,$38,$53,$52,$45,$44,$137,$135,$0,
Median $53,$57,$82,$80,$72.38 $74,$211.02 $214,($2,23)
3rd Quartile $79,$85,$119,$116,$100,$102,$300,$307,($7,60)
90th Percentile $102.42 $111.37 $162,$160,$133,$136,$393,$400,($13.24)
Test Group Sample n=74 Customers
June July August June Through August
Standard Standard Standard Standard Difference
Statistic Rates Rates Rates Rates Rates Rates Rates Rates EWP-Std
Mean $59,$64,$80,$83,$71.25 $74,$211.76 $222,($10.46)
10th Percentile $26,$27,$34,$34.44 $32,$33,$99,$100,($0,80)
1 st Quartile $38.44 $40,$52,$52,$46,$47.43 $132,$138,($4,16)
Median $52,$55,$75,$78,$69,$73,$208,$219,($9,00)
3rd Quartile $77.13 $83,$99,$102,$91.64 $96,$261.64 $269.46 ($14.41)
90th Percentile $10 1.25 $110,$125,$133,$114,$121.92 $334,$357,($23,23)
Control Group Sample n=357 and Test Group Sample n=74 Customers
June July August June Through August
Test Control Test Control Test Control Test Control Difference
Statistic EW Rate Std Rate EW Rate Std Rate EW Rate Std Rate EW Rate Std Rate EW-Std
Mean $59,$65,$80,$89,$71.25 $79,$211.76 $234,($22,26)
Table 10 - Energy Watch Bill Comparisons
Examining the test group sample of customers, the average Energy Watch bill was $211.76.
these customers would have been billed under the standard rate, then the average summer
seasonal bill would have been $222.22 or $10.47 more than the Energy Watch bill. This is a
7% decrease for the Energy Watch participants. The last portion of the table contrasts the
control group customer s average bill under the standard rate versus the test group customer
4 The customer bills were calculated based on the service charge, the energy charge and the power cost
adjustment.
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average bill under the Energy Watch rate. Under this scenario, the Energy Watch customer saves
approximately $22.26 (or 9.5%) for the entire summer season.
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ApPENDIX A - RESIDENTIAL RATE SCHEDULES EFFECTIVE
JUNE 2005
Residential Rates Effective June 2005
Schedule 1, Residential Service
Service Charge, per month
Power Cost Adjustment (PCA), per kWh 006045
Energy Charge, per kWh (Sept. 1 - May 31)054280
Energy Charge, per kWh (June 1 - Aug. 31)
300 kWh 054280
Over 300 kWh 060936
Schedule 4, Energy Watch Pilot Program
Service Charge, per month
Power Cost Adjustment (PCA), per kWh 006045
EnergyCharge perkWh(Sept.1-May31)054280
Energy Charge, per kWh (June 1 - Aug. 31)
Energy Watch Event 200000
All Other Hours 054280
Schedule 5, Time-Of-Day Pilot Program
Service Charge, per month
Power Cost Adjustment (PCA), per kWh 006045
Energy Charge, per kWh (Sept. 1 - May 31)054280
Energy Charge, per kWh (June 1 - Aug, 31)
On-Peak (weekday 1pm-9pm)068686
Mid-Peak (weekday 7am-1pm)061717
Off-Peak (weekday 9pm-7am plus weekends and July 4)053004
Table 11 - Summary of Residential Rates
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