1

Time-of-Day / Energy WatchPilot Programs

Program Design Preliminary Program Results Lessons Learned A/C Cool Credit

2

Time-of-Day/Energy Watch Pilot Programs

Focus Groups with Customers for program design Began marketing of programs to 5,000 Emmett

customers Advertising Direct mail Community Presentations Employee Education

Response rate of 80 Energy Watch customers and 97 Time-of-Day Customers

EW – 80 on June 1 / 76 on August 31 TOD- 97 on June 1 / 92 on August 31

3

Time-of-Day (TOD)Available: June-August 2005

On-Peak Monday-Friday 1:00 – 9:00 p.m. 6.8686¢ / kWh (13% differential from Rate 1)

Mid-Peak Monday-Friday 7:00 a.m. – 1:00 p.m. 6.1717¢ / kWh (11% differential from On-Peak)

Off-Peak Monday-Friday 9:00 p.m. – 7:00 a.m. Saturday, Sunday, Holidays – All Hours 5.3004¢ / kWh (30% differential from On-Peak)

Rate 1- Residential 0-300 kWh - 5.428¢/ kWh > 300 kWh – 6.0936¢/ kWh

4

Energy Watch (EW)Available: June-August 2005

10 EW days June 15 – August 15 Notify Customers day-ahead by phone

(Mosaix/operators) and Email (when available)

EW hours – 5:00 p.m. to 9:00 p.m. Weekdays Rate: 20¢ / kWh during EW hours Rate: 5.428 ¢/kWh all other hours June 1–

August 31 (Rate 1 – First Block Rate)

5

Customer Satisfaction

Customer Survey Preliminary results: Participants overall were satisfied with

programs 60% would participate again 50% would recommend to others

Bill Impact From Survey

44% believed bills decreased 38% believed bills unchanged 18% believed bills increased

6

Time-of-DayPreliminary Data Analysis

TOD Load Impact

Load shift (decrease) was not statistically significant Some load decrease during On-Peak hours Some load increase during Off-Peak hours

Average Summer Bill Impact Participant bills decreased $4.88 compared to Rate 1 Non-Participant bills decreased $4.53 compared to Rate

1 Participant bills decreased $10.57 (5 %) compared to

Non-participants

Average Weekday Comparison Average Weekday Comparison -- 20052005

H: Control Group, Mean, TODB: TOD Test Group, Mean, TOD

0

1

2

3

06:00 12:00 18:00 00:00

kW

Hour Ending

June

0

1

2

3

06:00 12:00 18:00 00:00

kW

Hour Ending

July

0

1

2

3

06:00 12:00 18:00 00:00

kW

Hour Ending

August

Average Weekend Comparison Average Weekend Comparison -- 20052005

0

1

2

3

06:00 12:00 18:00 00:00

kW

Hour Ending

June

0

1

2

3

06:00 12:00 18:00 00:00

kW

Hour Ending

July

0

1

2

3

06:00 12:00 18:00 00:00

kW

Hour Ending

August

H: Control Group, Mean, TODB: TOD Test Group, Mean, TOD

9

Energy WatchPreliminary Data Analysis

Energy Watch Load Impact

Substantial demand reduction during Energy Watch hours

1.58 kW maximum average demand reduction 1.33 kW average demand reduction Demand reduction increased with temperature

Average Summer Bill Impact Participant bills decreased $10.46 compared to Rate 1 Non-Participant bills decreased $4.04 compared to Rate

1 Participant bills decreased $22.26 (10 %) compared to

Non-participants

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00

kW

Local Time

Friday July 01, 2005

Average of All Event DaysAverage of All Event Days

Average of All Event Days

EventPeriod

J: Control Group, Mean, EWPC: EWP Test Group, Mean, EWP

Event DaysEvent Days

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

Fri 08 Sat 09 Sun 10 Mon 11 Tue 12 Wed 13 Thu 14 Fri 15 Sat 16

kW

Local Time

July 2005

94oF 96oF 104oF 106oF 96oF 101oF 97oF 90oF99oF

July 7 July 13 July 15 July 21 July 27 July 29 August 4 August 9 August 11

C: EW Test Group, EW, MeanJ: Control Group, EW, Mean

12

Lessons Learned

Review program design Adjust pricing to avoid Non-Participant benefits Adjust pricing to encourage more load shifting

Labor Intensive/Not Scalable Call Center / Meter Support Corporate Communications Corporate Publishing Customer Satisfaction

Automated System(s) for Customer Notification

13

A/C Cool CreditAir Conditioner Cycling Program

What works? Multiple Channels of Communication with the Customer/Participant

Participants have two types of communication needs--getting programmatic questions answered (non-time sensitive), and having problems solved under stress (time sensitive issues like equipment failure). Need redundant communication methods for both situations, including phone, email, web, collateral materials, stickers, etc.

Marketing In marketing, lots of information (brochure) outperformed postcards. The

Company received an 8% response rate vs. 2% response rate. Documentation and Verification

Documenting and verifying information flow across all partners. Setting up information flows isn't enough, these must be tested and verified periodically to ensure processes are running smoothly.

14

2004 Load Curve, A/C Cool Credit

Average Control and Non-Control Daysin July

0

0.5

1

1.5

2

2.5

3

3.5

4

1 3 5 7 9 11 13 15 17 19 21 23

Hour of the Day

Ave

rag

e kW

/ho

ur

Average non-control days

Average 50% control days

Average 67% control days

• This chart provides the average load shape across all participants for the 50% and 67% cycling days in July to the average non-cycling days. The graph illustrates the observed drop in consumption during the control period and the associated increase in consumption following the control period or the “snapback” effect.