1. MARS Taskforce RMS Update May 12, 2010

2. Interim Settlement Solution 05/10 Status Report 2 Execution MilestonesBaseline DateRevised DateStatus Project Complete05/21/2010OnSchedule

3. Status Report As of May 5, 2010: Little less than 745,000 ESI IDs have been settled using 15 minute AMS data at ERCOT AEP is currently internally testing their AMS systems and communications. As of May 5, 2010: Little less than 745,000 ESI IDs have been settled using 15 minute AMS data at ERCOT AEP is currently internally testing their AMS systems and communications. 3

4. AMS Meter Installation Status Report Oncor: Installed: 913,482 as of 4.30.2010 Deployment Plan: 2010 – 929,000 meters 2011 – 902,000 meters 2012 – 902,000 meters Oncor: Installed: 913,482 as of 4.30.2010 Deployment Plan: 2010 – 929,000 meters 2011 – 902,000 meters 2012 – 902,000 meters 4

5. AMS Meter Installation Status Report CenterPoint Energy: Installed: 322,983 as of 4.29.2010 Deployment Plan: 2010 – 756,000 meters 2011 – 960,000 meters 2012 – 400,000 meters CenterPoint Energy: Installed: 322,983 as of 4.29.2010 Deployment Plan: 2010 – 756,000 meters 2011 – 960,000 meters 2012 – 400,000 meters 5

6. PUCT Project 34610 Advanced Metering Implementation Team (AMIT) Documentation & Meeting Schedules can be found on: Public Utility Commission of Texas Project 34610 Website : http://www.puc.state.tx.us/electric/p rojects/34610/34610.cfm http://www.puc.state.tx.us/electric/p rojects/34610/34610.cfm Advanced Metering Implementation Team (AMIT) Documentation & Meeting Schedules can be found on: Public Utility Commission of Texas Project 34610 Website : http://www.puc.state.tx.us/electric/p rojects/34610/34610.cfm http://www.puc.state.tx.us/electric/p rojects/34610/34610.cfm 6

7. Advanced Metering Implementation Team (AMIT) MAY 2010 *20 – Market Readiness Scorecard WebEx Staff’s proposal for a Scorecard for Smart Grid 1.0 – more information to follow Thu: 10:00-2:00 24 and 25 – Project #2 Finalization of Web Portal, Fall Release (F2F) Mon: 1:30 – 5:30 Tue: 8:30 - 4:30 Location: ERCOT, RM 206 A, {7620 Metro Center Dr., Austin, TX 78744} MAY 2010 *20 – Market Readiness Scorecard WebEx Staff’s proposal for a Scorecard for Smart Grid 1.0 – more information to follow Thu: 10:00-2:00 24 and 25 – Project #2 Finalization of Web Portal, Fall Release (F2F) Mon: 1:30 – 5:30 Tue: 8:30 - 4:30 Location: ERCOT, RM 206 A, {7620 Metro Center Dr., Austin, TX 78744} 7

8. Advanced Metering Implementation Team (AMIT) JUNE 2010 22-23 – Project #8 Long Term Settlements (F2F) Tue: 9:30-5:30 Wed: 8:30-4:30 Location: Public Utility Commission, CHR, 7 th Floor, {1701 N. Congress Ave, Austin, TX 78701} Critical Kick-Off for this Project - See Long Term Settlement Study results on AMIT webpage (recommended) 28-29 – Project #8 Long Term Settlements (F2F) Mon: 1:30-5:30 Tue: 8:30-4:30 Location: Public Utility Commission, CHR, 7 th Floor, {1701 N. Congress Ave, Austin, TX 78701} JUNE 2010 22-23 – Project #8 Long Term Settlements (F2F) Tue: 9:30-5:30 Wed: 8:30-4:30 Location: Public Utility Commission, CHR, 7 th Floor, {1701 N. Congress Ave, Austin, TX 78701} Critical Kick-Off for this Project - See Long Term Settlement Study results on AMIT webpage (recommended) 28-29 – Project #8 Long Term Settlements (F2F) Mon: 1:30-5:30 Tue: 8:30-4:30 Location: Public Utility Commission, CHR, 7 th Floor, {1701 N. Congress Ave, Austin, TX 78701} 8

9. Advanced Metering Implementation Team (AMIT) JULY 2010 7 –Project 5 - Retail Market Interface (F2F) Wed: 8:30-4:30 Location: Public Utility Commission, CHR, 7 th Floor, {1701 N. Congress Ave, Austin, TX 78701} WebEx: check AMIT webpage for instructions: http://www.puc.state.tx.us/electric/projects/34610/34610.cfm http://www.puc.state.tx.us/electric/projects/34610/34610.cfm 13-14 – Project 5 – Retail Market Interface (F2F) Tue: 9:30-5:30 Wed: 8:30-4:30 Location: Public Utility Commission, CHR, 7 th Floor, {1701 N. Congress Ave, Austin, TX 78701} WebEx: check AMIT webpage for instructions: http://www.puc.state.tx.us/electric/projects/34610/34610.cfm http://www.puc.state.tx.us/electric/projects/34610/34610.cfm JULY 2010 7 –Project 5 - Retail Market Interface (F2F) Wed: 8:30-4:30 Location: Public Utility Commission, CHR, 7 th Floor, {1701 N. Congress Ave, Austin, TX 78701} WebEx: check AMIT webpage for instructions: http://www.puc.state.tx.us/electric/projects/34610/34610.cfm http://www.puc.state.tx.us/electric/projects/34610/34610.cfm 13-14 – Project 5 – Retail Market Interface (F2F) Tue: 9:30-5:30 Wed: 8:30-4:30 Location: Public Utility Commission, CHR, 7 th Floor, {1701 N. Congress Ave, Austin, TX 78701} WebEx: check AMIT webpage for instructions: http://www.puc.state.tx.us/electric/projects/34610/34610.cfm http://www.puc.state.tx.us/electric/projects/34610/34610.cfm 9

10. Questions? 10