Retail Metering Working Group Progress Report 04/15/09

Contents of Report Modified Manufacturer Standards Compliance Form Letter Discussed Competitive Metering Rule & AMS Reviewed Section 12 of the CMG Discussed the Process for Changing IDR to AMS Discussed OGRR 0219 Discussed Impact of Pre-Pay Review Meeting Action Items

Modified Manufacturer Standards Compliance Form Letter Removed web link in the Form Letter Suggested changes were accepted ERCOT will post the updated document

Discussed Competitive Metering Rule & AMS PURA § Metering and Billing Services (a), (b) Metering services provided to C & I customers that are required by the ISO to have an IDR may be provided on a competitive basis For residential & non-residential customers other than those required to have an IDR by ERCOT, metering services shall continue to be provided by the TDSP § Competitive Metering Services (b)(1) Defines commercial and industrial customers (b)(5) Defines metering services (c) Defines Meter ownership ERCOT Protocols Installation and Use of Interval Data Recorders Per ERCOT Protocols (Sec (1)a and b) IDRs shall be installed & utilized for settlement of Premises having either: –A peak Demand greater than 700 kW (or 700 kVA), or –Service provided at transmission voltage (above 60 kV)

Discussed Competitive Metering Rule & AMS (cont.) Determined that AMS does not impact existing RMWG procedures & rules (meter ownership) Reviewed the Qualified Competitive Meter List and decided: Remove meters that do not have “IDR” listed as part of the required functionality ERCOT will update and repost the Qualified Competitive Meter List

Reviewed Section 12 of the CMG Discussed updating the Competitive Metering Guides (CMG) to provide clarification of Standards for Competitive Metering per input from Meter Manufacturer A CMGRR was created and has been submitted to ERCOT Market Rules

Discussed the Possibility of Changing IDR to AMS Discussed the possibility & impacts of removing IDRs & replacing them with Advanced Meters Three broad possibilities Change IDR to AMS – Treat as IDR Change IDR to AMS – Treat as AMS Change IDR to AMS – Treat as IDR but utilize AMS REPs, ERCOT & TDSPs need to check internally Any system changes? What type of impact on the profile type? REPs & TDSPs need to check internally TDSP rate and tariff issues? Benefits to REPS, TDSPs and the customer? Is the change a REP, TDSP or customer choice?

Discussed the Possibility of Changing IDR to AMS (cont.) If yes, The ERCOT Protocols need to be revised to allow an IDR to be removed and replaced with an Advanced meter (AMS) The REP should coordinate communications for all customers before any changes from IDR meters to AMS meters occur Changing an IDR to an AMS is limited to premises that are not required to have an IDR by ERCOT Protocols

Discussed the Possibility of Changing IDR to AMS (cont.) To do: We have noted tasks for various market participants to get feedback on and will continue this discussion going until we make a decision on how to proceed

Discussed OGRR 0219 Would stopping time error correction have an impact? Will it impact the TDSP & require more effort to keep meter time for IDR within protocols limits? Will it impact meters with time of use programs? Could meters be programmed to keep time based on the internal crystal instead of synchronizing with the line frequency? The crystal oscillator may have significant time drift issues. TDSPs to check & provide information/feedback by April 6th

Discussed Impact of Pre-Pay How do Pre-Pay services/devices affect or impact existing procedures & rules established by RMWG? Are modifications needed to include procedures & standards for pre-pay devices? Per Chapter 25. Subchapter R. CUSTOMER PROTECTION RULES FOR RETAIL ELECTRIC SERVICE: §25.498(b) Defines prepayment systems as a device or technology owned by a REP §25.498(c)(2) Prepayment devices are installed on customer side of TDU meter

Discussed Impact of Pre-Pay The Retail Metering Working Group (RMWG) determined that since devices are on customer side of the meter there would be no impact from Pre-Pay services/devices to the existing procedures & rules

Action Items TDSPs, REPs & ERCOT to discuss impacts of changing appropriate IDRs with AMSmeters given the different above mentioned possibilities as detailed in the document capturing this discussion ERCOT to update Competitive Meter List ERCOT Market Rules to review & returnCMGRR to RMWG Chair for submission TDSPs and REPs to provide impacts on ERCOT not providing time error correction for NERC study TDSPs to determine if there is an alternative to utilizing line frequency for time by April 6th

Questions?????