MARS Taskforce RMS Update April 12, 2011

Initial Settlement As of April 5, 2011 Operating Date: March 29, 2011 AMC ESI ID Totals: 2,601,788 AMDG ESI ID Totals: 486 Estimated Percentage: % As of April 5, 2011 Operating Date: March 29, 2011 AMC ESI ID Totals: 2,601,788 AMDG ESI ID Totals: 486 Estimated Percentage: % 2

Final Settlement As of April 5, 2011 Operating Date: February 8, 2011 AMC ESI ID Totals: 2,386,715 AMDG ESI ID Totals: 443 Estimated Percentage: % As of April 5, 2011 Operating Date: February 8, 2011 AMC ESI ID Totals: 2,386,715 AMDG ESI ID Totals: 443 Estimated Percentage: % 3

True-Up Settlement As of April 5, 2011 Operating Date: October 7, 2010 AMC ESI ID Totals: 1,603,887 AMDG ESI ID Totals: 253 Estimated Percentage: % As of April 5, 2011 Operating Date: October 7, 2010 AMC ESI ID Totals: 1,603,887 AMDG ESI ID Totals: 253 Estimated Percentage: % 4

AMS Meter Installation Status Report Oncor (approximately): Installed: 1,634,604 as of Deployment Plan: 2010 – 929,000 meters 2011 – 902,000 meters 2012 – 902,000 meters Oncor (approximately): Installed: 1,634,604 as of Deployment Plan: 2010 – 929,000 meters 2011 – 902,000 meters 2012 – 902,000 meters 5

AMS Meter Installation Status Report CNP (approximately): Installed: 1,204,049 as of Deployment Plan, includes projected growth: 2010 – 756,684 meters 2011 – 960,327 meters 2012 – 373,423 meters CNP (approximately): Installed: 1,204,049 as of Deployment Plan, includes projected growth: 2010 – 756,684 meters 2011 – 960,327 meters 2012 – 373,423 meters 6

AMS Meter Installation Status Report AEP (approximately): Installed: 247,135 as of Deployment Plan schedule: 2010 – 188,212 meters 2011 – 251,571 meters 2012 – 279,329 meters 2013 – 278,280 meters AEP (approximately): Installed: 247,135 as of Deployment Plan schedule: 2010 – 188,212 meters 2011 – 251,571 meters 2012 – 279,329 meters 2013 – 278,280 meters 7

Market AMS Installed Totals 8

SMT Disaster Recovery Exercise Friday, April 29 through Monday, May 2, Why the interruption? In order to replicate as closely as possible the steps needed in the event of an actual disaster to maintain and protect the integrity of the SMT Portal and its data. Affected Parties Retail Electric Providers TDSPs Consumers (residential and commercial) Friday, April 29 through Monday, May 2, Why the interruption? In order to replicate as closely as possible the steps needed in the event of an actual disaster to maintain and protect the integrity of the SMT Portal and its data. Affected Parties Retail Electric Providers TDSPs Consumers (residential and commercial) 9

SMT Disaster Recovery Exercise Functions that will be Unavailable during some of these outage windows Portal Including HAN functions HAN APIs Ad-hoc Reporting APIs FTPS Files Functions that will be Unavailable during some of these outage windows Portal Including HAN functions HAN APIs Ad-hoc Reporting APIs FTPS Files 10

SMT Disaster Recovery Exercise Important Dates April 29 th (Friday) - SMT Solution including the Portal that includes portal HAN functions, HAN APIs, Adhoc Reporting APIs, and FTPS files will be Unavailable beginning at approximately 8:00 A.M. (CPT) April 30 th (Saturday) – SMT Solution including the Portal that includes HAN functions, HAN APIs, Adhoc Reporting APIs and FTPS files are Available beginning at approximately 8:00 A.M. (CPT) Important Dates April 29 th (Friday) - SMT Solution including the Portal that includes portal HAN functions, HAN APIs, Adhoc Reporting APIs, and FTPS files will be Unavailable beginning at approximately 8:00 A.M. (CPT) April 30 th (Saturday) – SMT Solution including the Portal that includes HAN functions, HAN APIs, Adhoc Reporting APIs and FTPS files are Available beginning at approximately 8:00 A.M. (CPT) 11

SMT Disaster Recovery Exercise Important Dates May 1, 2011 (Sunday) – SMT Solution including the Portal that includes portal HAN functions, HAN APIs, Adhoc Reporting APIs, and FTPS files will be Unavailable beginning at approximately 8:00 A.M. (CPT) Important Dates May 1, 2011 (Sunday) – SMT Solution including the Portal that includes portal HAN functions, HAN APIs, Adhoc Reporting APIs, and FTPS files will be Unavailable beginning at approximately 8:00 A.M. (CPT) 12

SMT Disaster Recovery Exercise Back to Normal Operations: May 2, 2011 (Monday) – SMT Solution including the Portal this includes portal HAN functions, HAN APIs, Adhoc Reporting APIs, and FTPS files should resume “business as usual” beginning at approximately 8:00 A.M. (CPT) Back to Normal Operations: May 2, 2011 (Monday) – SMT Solution including the Portal this includes portal HAN functions, HAN APIs, Adhoc Reporting APIs, and FTPS files should resume “business as usual” beginning at approximately 8:00 A.M. (CPT) 13

SMT Disaster Recovery Exercise Any LSE Data Files that were not posted prior to April 29 th may be Unavailable between April 29 th and May 2 nd. The LSE Data Files for April 29 th and April 30 th will be Unavailable after May 1 st at 8 AM, so if those files are needed, CRs should download them prior to May 1 st 8:00 A.M. outage window Any LSE Data Files that were not posted prior to April 29 th may be Unavailable between April 29 th and May 2 nd. The LSE Data Files for April 29 th and April 30 th will be Unavailable after May 1 st at 8 AM, so if those files are needed, CRs should download them prior to May 1 st 8:00 A.M. outage window 14

Weekly SMT Outage Conference Calls Weekly conferences are scheduled for question and answer prior to the April 29 th - May 2 nd events. Every Thursday in April at 9:30 AM: Dates: April 7, April 14, April 21, and April 28 Conference Bridge Numbers: Pass Code Weekly conferences are scheduled for question and answer prior to the April 29 th - May 2 nd events. Every Thursday in April at 9:30 AM: Dates: April 7, April 14, April 21, and April 28 Conference Bridge Numbers: Pass Code

PUCT Project Advanced Metering Implementation Team (AMIT) Documentation & Meeting Schedules can be found on: Public Utility Commission of Texas Project Website : rojects/34610/34610.cfm rojects/34610/34610.cfm Advanced Metering Implementation Team (AMIT) Documentation & Meeting Schedules can be found on: Public Utility Commission of Texas Project Website : rojects/34610/34610.cfm rojects/34610/34610.cfm 16

AMIT Working Group Meeting Schedules Registration, Administration & Access Working Group (RAAWG) May 6, 1-2 PM May 25, 2011 at the PUCT Hearing Room Topic : Third Party Access to Customer’s Advanced Meter Data Operations and Maintenance Working Group (OMWG) Every other Wednesday from 1-3 pm Scheduled through August 24, 2011 Projects and Strategy Working Group (PSWG) Thursdays at 3:30 pm Scheduled through May 12, 2011 Registration, Administration & Access Working Group (RAAWG) May 6, 1-2 PM May 25, 2011 at the PUCT Hearing Room Topic : Third Party Access to Customer’s Advanced Meter Data Operations and Maintenance Working Group (OMWG) Every other Wednesday from 1-3 pm Scheduled through August 24, 2011 Projects and Strategy Working Group (PSWG) Thursdays at 3:30 pm Scheduled through May 12,

AMIT Meeting Schedule APRIL th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 MAY th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 APRIL th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 MAY th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room

Advanced Metering Implementation Team (AMIT) JUNE th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 JULY th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 JUNE th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 JULY th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room

Advanced Metering Implementation Team (AMIT) AUGUST rd (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 SEPTEMBER th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 AUGUST rd (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room 206 SEPTEMBER th (F2F) Tues: 9:30 AM – 5:30 PM AMIT Steering Committee meeting Location: ERCOT Met Center Conference Room

Questions? 21