1. Oncors Advanced Meter System (AMS) Enabling Demand Response for Retail Electric Providers in Texas Mark Carpenter June 24, 2010

2. 1 1 ~ 630 miles ~ 390 miles 27,000 square miles of territory 3.1 million meters 87 customers (Retail Electric Providers –REPs) Oncors AMS Profile AMS Deployment 2008 – 2012 3.4 million AMS meters by 2012 Current count is more than 1,000,000 AMS meters

3. 2 2 Stages of Demand Response Enablement Relative Costs Benefit Provide 15 minute usage data (day after basis) Provide direct usage data between the meter and premise Provide the REPs direct interaction with customers Home Area Network (HAN) devices Smart Appliances Thermostats Lighting Controls In-home Display

4. 3 3 REPs AMS HAN Capability Provide the REPs direct interaction with customers Home Area Network (HAN) devices Smart Appliances Thermostats Lighting Controls In-home Display Text messaging Load control: direct; through thermostat adjustment. Pricing Current Price; Next or Future Price; Pricing Event; Time of Use (TOU) with 5 Pricing Tiers. Smart Meter Texas Portal Wires Co. Via ZigBee Smart Energy Profile (SEP) 1.0

5. 4 4 Advanced Metering System (Market Perspective) Consumer Retail Electric Provider ERCOT Regulated Electric Utility (Wires Co.) SMART METER TEXAS Host Market Transactions ( Monthly Meter Readings and Daily 15 Minute VEE Data ) Market / Daily 15 Minute Settlement Transactions Meter / HAN Services ( Daily 15 Minute Meter Data) Optional Path for Retail Electric Provider HAN Services Historic Daily 15 Minute VEE Meter Data and limited Meter / HAN Services Meter / HAN Services (thru Oncor system) and future path for Daily 15 Minute VEE Meter Data Daily 15 Minute Meter Data and Meter / HAN Transactions Over Utility Infrastructure 4 Daily 15 Minute VEE Meter Data

6. 5 5 5 Smart Meter Texas Portal

7. 6 6 6 API Wires Companys Separate GUIs NOTE: GUI - Graphical User Interface API - Application Programming Interface HAN - Home Area Network Historic 15 minute interval usage data HAN device provisioning Historic 15 minute interval usage data HAN device provisioning Historic 15 minute interval usage data HAN device provisioning HAN messaging Historic 15 minute interval usage data HAN device provisioning HAN messaging Smart Meter Texas Portal

8. 7 7 Now to Hear from a Retail Electric Provider