1. Lead from the front Texas Nodal http://nodal.ercot.com 1 Registration Data Update Aug 25, 2008

2. Lead from the front Texas Nodal http://nodal.ercot.com 2 Agenda MP10 and MP11 Update GenSite Topology Form Non-Modeled Generation Declaration Form Next Steps

3. Lead from the front Texas Nodal http://nodal.ercot.com 3 MP10 Update MP-10 – Completion of Mapping of Resources to Resource Nodes and Resources to Revenue Quality Meters RED (Missing / No Response) 17 AMBER (Feedback Required) 3 GREEN (MP Review Complete) 158 Existing Sites178 NEW Sites13 Total Sites191

4. Lead from the front Texas Nodal http://nodal.ercot.com 4 MP-11 Update MP-11 Registration Activities RED (Missing Crit. Data / No Response) 11 AMBER (Feedback Required) 77 GREEN (Tier 1 Review Accepted) 138 Existing Sites226 NEW Sites10 Total Sites236

5. Lead from the front Texas Nodal http://nodal.ercot.com 5 GenSite Topology Form Objective –GenSite Topology form will establish an inventory of RE owned transmission assets –Clarify ownership in parallel to TSP activities –Required for ERCOT to process NOMCR’s ERCOT will populate as much of the GenSite Topology Form as possible from: –Branch Data File (repository file for Transmission Data Forms) –From RARF - GSU (Generator Step Up) Transformer Form –From RARF - Gen-Owned Transmission Assets Form

6. Lead from the front Texas Nodal http://nodal.ercot.com 6 GenSite Topology Form Process and MP-11 Metric Component –ERCOT will populate available data into GenSite form –Form will be sent to Resource Entities –Resource Entities will correct/add/remove data as applicable and return the form to ERCOT –ERCOT will execute change through the NOMCR process –This process will be tracked and roll into the MP-11 metric

7. Lead from the front Texas Nodal http://nodal.ercot.com 7 Non-Modeled Generation Declaration Form Non-Modeled Generator –Protocol Definition (Non-Modeled Generator): (section 2.1 DEFINITIONS) Non-Modeled Generator A generator that is: (a) Capable of providing net output of energy to the ERCOT System; (b) 10 MW or less in size; or greater than ten MW and registered with the PUCT according to P.U.C. Subst. R. §25.109, Registration of Power Generation Companies and Self-Generators, as a self-generator; and (c) Registered with ERCOT as a Non-Modeled Generator, which means that the generator may not participate in the Ancillary Service or energy markets, RUC, or SCED

8. Lead from the front Texas Nodal http://nodal.ercot.com 8 Non-Modeled Generation Declaration Form Non-Modeled Generator Required Data (per protocol section 3.10.7.3) –Generators less than 10 MW Non-Modeled Generation Declaration Form –If the resource “Contains a generator greater than ten MW and is registered with the PUCT according to P.U.C. Subst. R. 25.109, Registration of Power Generation Companies and Self-Generators, as a power generation company” Non-Modeled Generation Declaration Form RARF GenSite Topology Form

9. Lead from the front Texas Nodal http://nodal.ercot.com 9 Next Steps Upcoming WebEx Market Call –Discuss details and timelines of the GenSite Topology Form Non-Modeled Generation –Ongoing Market Metrics Rolling in Tier 2 and 3 screening activities of RARF’s Metric update frequency Artifacts demonstrating MP Completion of MP-10 and MP-11 (action item from last TPTF) –If there any Registration related topics that MP’s would like to see covered, please send them to nodalmarkettransition@ercot.comnodalmarkettransition@ercot.com Next Month’s TPTF –Review Resource Decision Making Authority Attestation Attestation in review with Congestion Management Working Group Next review to occur on 8/27

10. Lead from the front Texas Nodal http://nodal.ercot.com 10 Q&A Q&A / Open Forum