2011 Residential HAN Pilots Evaluation Results © 2011San Diego Gas & Electric Company. All copyright and trademark rights reserved. 1

Overview Description of Pilots Evaluation Findings Conclusions & Recommendations 2

Pilot Descriptions 3

Low-Income IHD and PCT Pilots Criteria – Average monthly usage of at least 275 kWh – Participated in ESA (LIEE) between 2006 and 2010 – Single-family homeowner – High-speed internet service with modem and available port on router – Working Air Conditioner – No Medical Baseline customers Participation – Opt-in – Received equipment at no charge 4

Simultaneous RACT Pilot Average monthly usage of at least 700 kWh Also received plug load controllers Invited to participate in energy-saving contest with prizes 5

Pilot Features Low-IncomeRACT IHDPCTIHDTECH Enrollment MethodOpt-in Enrollees Websitexxxx IHDx xx PCT x x PLC x Event Day Noticexxxx Incentive Contest xX 6

In-Home Display 7

Programmable Communicating Thermostat 8

Energy Management Website Hosted by third party Allows participant to: – See usage, cost, and price – Manage devices in the home/premise – See Demand Response events in progress and pending – See messages sent from utility to devices 9

Energy Management Website 10

Energy Management Website 11

Energy Conservation s Sent to roughly half participants in each group Four s over summer 2011 Included energy saving tips and information 12

Findings 13

Energy Savings On average, energy savings for low-income pilots were not measurable – Comparison with previous summer usage – Statistical analysis controlling for weather, time of installation and seasonality Minimal savings were found for RACT participants Highest savings were found for RACT contest participants – Received more feedback on usage – Competed for prizes 14

Demand Response Impacts Analyzed by groups – Device disconnected or signal not received – Signal received but thermostat not turned on – Signal received but customer opted out – Signal received and thermostat raised 4 degrees Usage on event day compared to Baseline – Highest 3 of previous 5 days 15

Demand Response Impacts, continued Events on Sept 6 th, 7 th and October 13 th Measureable impacts for group that received signal and raised thermostat: – 6.21 kW on first event (September 6 th ) – No impacts on Sept. 7 th – Minimal (1.6 kW) on Oct 13th 16

Process Evaluation Data CollectionIHDPCT Staff interviews>6 Initial impression survey11820 Post-event survey56N/A Follow-up in-depth interviews10 SDG&E Surveys Plus Research Into Action Interviews 17

Participant Expectations Participants reported they wanted to be on pilot to – Track their energy use (60%) – To save money (35%) – To use new technology (20%) 18

Useful Features 19

IHD Experience Most checked it frequently (70% at least once a day) Consistent use over time (62% same or more often) 38% did not like the aesthetics or design 27% desired additional functionality 20

PCT Experience Some thought it saved energy (4 of 10) Most agreed it was easy to use (6 of 10) Most were ok with allowing SDG&E to adjust the thermostat during an event (6 of 10 agreed and remainder were neutral) 21

Participant Attitudes 22

Conclusions & Recommendations 23

Recommendations: Identify strategies for providing information progressively. Information Considered Valuable 24

Recommendations: Demand response communication should be different from everyday messages about conservation. For energy savings, additional communications and/or incentives may be needed For demand response, more direction on what to do during an event may be needed Clarify DR versus EE messages 25

Recommendations: Prioritize ease of use when selecting products. Investigate opportunities to improve the user interfaces Improve device usability and interface 26

Recommendation: Continue quality control and technical support efforts to ensure that devices stay connected and functional Improve Connection Issues 27

Recommendations: Manage participant expectations of general energy savings – some thought the device itself saved energy. Program PCTs to meet household needs; some participants wanted their house warmer. Program PCTs and Explain Function 28

Questions? 29