1. Lead from the front Texas Nodal http://nodal.ercot.com 1 EDS 4 Release 9.1 DAM/RUC/SASM 4.9.1 Kickoff Meeting December 20, 2007

2. Lead from the front Texas Nodal http://nodal.ercot.com 2 Agenda DAM/RUC EDS 4.9.1 Overview: –Presentation Legend –Objectives –Audience DAM/RUC EDS 4.9.1 Timeline –Nodal Summary Release Schedule –Sandbox Testing –Testing Windows –Sample Activity Timeline DAM/RUC EDS 4.9.1 Testing –Testing Window –Basic Communications Test –Digital Certificates –Support Calls –Issue Management –Support Call Test Cases Tracking –Master Schedule –Preparation Checklist / Schedule –Readiness Metrics –Dashboard Reference –QSE Activity Summary –Relevant Documents Q&A

3. Lead from the front Texas Nodal http://nodal.ercot.com 3 Presentation Legend Note: Throughout this presentation, there are several references to activities required by QSE’s on the Web Services and MIS User Interface For convenience and clarity, the following will apply: –All activities that apply only to users of the MIS User Interface will appear in BLUE –All activities that apply only to users of the Web Services will appear in MAROON –Activities that apply to both the User Interface and the Web Services will remain in BLACK

4. Lead from the front Texas Nodal http://nodal.ercot.com 4 DAM/RUC EDS 4.9.1 Overview: Objectives Verify QSE’s ability to use either or both the MIS User Interface or Web Services interface as indicated in their sign-up email to perform scenarios specified for the following: –CRR Offer (NOIE and PCRR Holders only) –PTP Obligation –Three-Part Supply Offers for Energy (QSE’s w/ Resources only) –Capacity Trade –Energy Trade –AS Trade –DAM Energy-Only Offer –DAM Energy Bid –AS Self Arrangement (QSE’s with Load only) –AS Offer (QSE’s with Resources only) –Self Schedule –DC Tie Schedule Verify QSEs understanding of DAM/RUC input validation rules

5. Lead from the front Texas Nodal http://nodal.ercot.com 5 DAM/RUC EDS 4.9.1 Overview: Audience AFFORDABLE POWER PLAN LP (QSE) ALCOA POWER MARKETING LLC ALLIANCE POWER COMPANY LLC (QSE) AMBIT ENERGY LP (QSE) AMBRIDGE ENERGY LLC (QSE) AMERICAN ELECTRIC POWER SERVICE CORP AMERICAN ELECTRIC POWER SERVICE CORP (SQ1) AMERICAN ELECTRIC POWER SERVICE CORP (SQ2) AMERICAN ELECTRIC POWER SERVICE CORP (SQ3) AMERICAN ELECTRIC POWER SERVICE CORP (SQ4) ANDELER CORPORATION (QSE) ANP FUNDING I LLC APN STARFIRST LP (QSE) APN STARFIRST LP (SQ1) APNA HOLDING LLC (QSE) APX INC APX INC (SQ1) APX INC (SQ2) APX INC (SQ3) AQUILA INC DBA AQUILA NETWORKS Contact eds4@ercot.com if:eds4@ercot.com You should not be on this list You should be on this list but are not BANK OF AMERICA NA BARCLAYS BANK PLC (QSE) BEAR ENERGY LP (QSE) BLU POWER OF TEXAS LLC (QSE) BP ENERGY COMPANY (QSE) BPTX (SQ1) BPTX (SQ2) BPTX (SQ3) BRAZOS ELECTRIC POWER CO OP INC (QSE) BRILLIANT ENERGY LLC (QSE) BTU QSE SERVICES INC BTU SQ1 CALPINE POWER MANAGEMENT LP CALPINE POWER MANAGEMENT LP (SQ1) CARGILL POWER MARKETS LLC CITADEL ENERGY PRODUCTS LLC CITIGROUP ENERGY INC (QSE) CITY OF AUSTIN DBA AUSTIN ENERGY (QSE) CITY OF GARLAND (QSE) CITY OF SAN ANTONIO CITY PUBLIC SERVICE (QSE)

6. Lead from the front Texas Nodal http://nodal.ercot.com 6 DAM/RUC EDS 4.9.1 Overview: Audience CITY OF SAN ANTONIO CITY PUBLIC SERVICE CPS WIND (SQ1) CLEARVIEW ELECTRIC INC (QSE) CONOCOPHILLIPS COMPANY (QSE) CONOCOPHILLIPS COMPANY (SQ1) CONOCOPHILLIPS COMPANY (SQ2) CONSTELLATION ENERGY COMMODITIES GROUP INC (QSE) CONSTELLATION ENERGY COMMODITIES GROUP INC B (QSE) CONSTELLATION ENERGY COMMODITIES GROUP INC C (QSE) CONSTELLATION ENERGY COMMODITIES GROUP INC D (QSE) CONSTELLATION ENERGY COMMODITIES GROUP INC E (QSE) CONSTELLATION NEWENERGY INC CONSTELLATION NEWENERGY INC (SQ1) CORAL ENERGY MANAGEMENT LLC (QSE) CORAL ENERGY MANAGEMENT LLC (SQ1) CORAL ENERGY MANAGEMENT LLC (SQ2) CORAL POWER LLC CORAL POWER LLC (SQ1) CORAL POWER LLC (SQ2) CREDIT SUISSE ENERGY LLC (QSE) DB ENERGY TRADING LLC DEUTSCHE BANK TRADING DIRECT ENERGY LP DIRECT ENERGY LP WTU (SQ2) DPI ENERGY LLC DUKE ENERGY OHIO INC EAGLE ENERGY PARTNERS I LP (QSE) EAGLE ENERGY PARTNERS I LP (QSE) SETTLEMENTS ONLY EAGLE ENERGY PARTNERS I LP (SQ1) ECMT ECONNERGY ENERGY COMPANY INC (QSE) EDISON MISSION MARKETING AND TRADING INC ELECTRIC NOW LP (QSE) ENERGYCO MARKETING AND TRADING LLC (QSE) EPIC EXELON GENERATION COMPANY LLC EXELON GENERATION COMPANY LLC (SQ1) EXPERT ENERGY (STRATEGIC ENERGY LLC SUB QSE 1) FIRST CHOICE POWER LP FIRST CHOICE POWER LP (SQ1) FORMOSA UTILITY VENTURE LTD (QSE)

7. Lead from the front Texas Nodal http://nodal.ercot.com 7 DAM/RUC EDS 4.9.1 Overview: Audience FORTIS (SQ1) FORTIS ENERGY MARKETING AND TRADING GP FPL ENERGY POWER MARKETING FPL ENERGY POWER MARKETING INC (SQ3) FPL ENERGY POWER MARKETING INC (SQ4) FPL ENERGY TEXAS KEIR LLC (QSE) FPL ENERGY TEXAS LLC FPL ENERGY TEXAS LLC (SQ1) FPL ENERGY TEXAS LLC (SQ2) FPL ENERGY TEXAS LLC (SQ3) FPL ENERGY TEXAS LLC (SQ4) FPLE PMI (SQ1) FPLE_WIND_FPL ENERGY POWER MARKETING INC.(SQ2) FREEDOM GROUP LLC DBA FREEDOM POWER (QSE) FULCRUM POWER SERVICES LP FULCRUM POWER SERVICES LP (SQ1) FULCRUM POWER SERVICES LP (SQ2) GEXA CORP (SQ1) GEXA CORP. GLACIAL ENERGY INC (QSE) GOLDMAN SACHS GREEN MOUNTAIN ENERGY COMPANY (QSE) GULF STATES WHOLESALE EQUITY PARTNERS LP HIMALAYA POWER INC (QSE) HUDSON ENERGY SERVICES LLC HWY 3 MHP LLC (QSE) INTEGRYS ENERGY SERVICES INC (QSE) INTEGRYS ENERGY SERVICES INC (SQ1) IPA MARKETING INC (SQ1) J ARON AND COMPANY J ARON AND COMPANY (SQ1) JPMORGAN VENTURES ENERGY CORPORATION JUICE ENERGY INC JUST ENERGY TEXAS LP (QSE) KANSAS CITY POWER AND LIGHT COMPANY (QSE) KEYSTONE ENERGY PARTNERS LP LEACH ENERGY TRADING LLC LEHMAN BROTHERS COMMODITY SERVICES INC LIBERTY POWER CORP LLC (QSE) LOWER COLORADO RIVER AUTHORITY (QSE)

8. Lead from the front Texas Nodal http://nodal.ercot.com 8 DAM/RUC EDS 4.9.1 Overview: Audience LPT LLC DBA LPT SP LLC (QSE) LUMINANT ENERGY COMPANY LLC (QSE) LUMINANT ENERGY COMPANY LLC (SQ1) MEGA ENERGY MERRILL LYNCH COMMODITIES INC (QSE) MERRILL LYNCH COMMODITIES INC (SQ1) MIRANT ENERGY TRADING LLC MORGAN STANLEY CAPITAL GROUP INC MXENERGY ELECTRIC QSE NATIONAL POWER COMPANY INC (QSE) NEW MEXICO NATURAL GAS LP (QSE) NORTH AMERICAN ENERGY CREDIT AND CLEARING DELIVERY LLC NORTH AMERICAN ENERGY CREDIT AND CLEARING DELIVERY LLC (SQ1) NRG SOUTH TEXAS LP (QSE) NRG TEXAS POWER LLC (QSE) NUECES ELECTRIC COOPERATIVE INC RETAIL DIVISION (SQ1) OCCIDENTAL POWER SERVICES INC PEGASUS ALLIANCE CORPORATION DBA ONPAC ENERGY (QSE) PEPCO ENERGY SERVICES INC (QSE) PILOT POWER GROUP INC (QSE) PRE BUY ELECTRIC LLC (QSE) PRIER ENERGY RAINBOW ENERGY MARKETING CORPORATION (QSE) RAINBOW ENERGY MARKETING CORPORATION (SQ1) RAINBOW ENERGY MARKETING CORPORATION (SQ2) RELIANT ENERGY ELECTRIC SOLUTIONS (QSE) RELIANT ENERGY POWER SUPPLY LLC RELIANT ENERGY SERVICES INC (SQ2) REPOWER LLC (QSE) RIO NOGALES POWER PROJECT LP (QSE) SCURRY COUNTY WIND LP (QSE) SEMPRA ENERGY SOLUTIONS (QSE) SEMPRA ENERGY TRADING CORP SITARA ENERGY INC (QSE) SOUTH TEXAS ELECTRIC CO OP INC (QSE) SPARK ENERGY - Q2 (SQ1) SPARK ENERGY LP (QSE) STRATEGIC ENERGY LLC

9. Lead from the front Texas Nodal http://nodal.ercot.com 9 DAM/RUC EDS 4.9.1 Overview: Audience STREAM GAS AND ELECTRIC LTD (QSE) SUEZ ENERGY MARKETING NA INC SUEZ ENERGY RESOURCES NA INC (QSE) SUEZ ENERGY RESOURCES NA INC (SQ2) SUEZ ENERGY RESOURCES NA INC (SQ3) SURE ELECTRIC LLC DBA RIVERWAY POWER COMPANY (QSE) TARA ENERGY INC. (QSE) TENASKA POWER SERVICES CO TEXAS RETAIL ENERGY LLC (QSE) TEXAS STAR ENERGY (SQI) TEXPO POWER LP DBA TEXPO ENERGY TOPAZ POWER MANAGEMENT LP (QSE) TOPAZ POWER MANAGEMENT LP (SQ1) TRIEAGLE ENERGY SUPPLY (QSE) TRIEAGLE ENERGY SUPPLY (SQ1) TRIEAGLE ENERGY SUPPLY (SQ2) TRIEAGLE ENERGY SUPPLY (SQ3) TRIEAGLE ENERGY SUPPLY (SQ4) TRQ1 (SQ1) TRQ2 (SQ2) TRQ3 (SQ3) TRQ4 (SQ4) TRQ6 (SQ6) UBS AG LONDON BRANCH URBAN ENERGY SOURCE LLC (QSE) VEGA RESOURCES LLC DBA AMIGO ENERGY (QSE) VIASYN INC W POWER AND LIGHT LP (QSE) W POWER AND LIGHT LP (SQ1) WCW INTERNATIONAL INC WESTAR (SQ1) WESTAR ENERGY INC (QSE) XTEND ENERGY LP YOUNG ENERGY LLC (QSE)

10. Lead from the front Texas Nodal http://nodal.ercot.com 10 DAM/RUC 4.9.1 Timeline: Texas Nodal Program Summary Release Schedule High Level Version (as of 11/30/2007)

11. Lead from the front Texas Nodal http://nodal.ercot.com 11 DAM/RUC 4.9.1 Timeline: Sandbox Testing Nodal SandBox: Contains External Web Services pertinent to DAM/RUC. If you indicated you will test using Web Services, use the sandbox to verify your connectivity and XML structures. You should be doing this now. For support contact eds4@ercot.comeds4@ercot.com

12. Lead from the front Texas Nodal http://nodal.ercot.com 12 DAM/RUC 4.9.1 Timeline: Testing Windows Use of EWS and/or the MIS UI will be demonstrated during the testing window

13. Lead from the front Texas Nodal http://nodal.ercot.com 13 DAM/RUC 4.9.1 Timeline: Example Activity Timeline EDS TIMELINE Example Activity Timeline

14. Lead from the front Texas Nodal http://nodal.ercot.com 14 DAM/RUC 4.9.1 Testing: Testing Window QSE’s will sign up via email for a testing window –This will initiate a number of events that will occur before the Testing Window (detailed in a later slide) –Testing Window includes: 2 hour support and scripted testing call Resolution of issues during the 2 hour support call 7 day testing window for prioritized support and self guided testing Self guided testing are test scenarios that the QSE has defined and executes independently in the EDS environment –Testing Windows will start with QSE’s using the Web Services The new MIS MIS UI’s are at risk for delivery on 1/15 –Scheduling your testing window early allows more time for self guided testing, make-up windows and issue resolution

15. Lead from the front Texas Nodal http://nodal.ercot.com 15 DAM/RUC 4.9.1 Testing: Testing Window Sign-up Email Content The sign-up Email from QSEs should include: Support Window Date and AM or PM preference –Provide top three preferred dates –ERCOT may still need to coordinate a date outside of these 3, but will make every effort to be on one of these dates DUNS number of QSEs & sub-QSEs If using Web Services confirm that you the QSE will be engaged in testing and not your 3 rd Party Service Provider: Yes/No If using Web Services the URL where notifications will be sent Note: If this is unavailable at the time of sign up, this must be received 2 weeks prior to your scheduled testing window Send sign-up email to eds4@ercot.com by January 4 th, 2008eds4@ercot.com

16. Lead from the front Texas Nodal http://nodal.ercot.com 16 DAM/RUC 4.9.1 Testing: Basic Communications Test (“Ping” Test) QSE’s testing on the Web Services for the first time will be Scheduled for a 1 Hour Basic Communications test –This test typically takes 20-30 minutes if no issues are found –1 hour is allocated to address any issues –Tests performed on the call will be as follows: ERCOT performs a telnet to QSE’s Listener QSE performs telnet to ERCOT External Web Services Listener QSE send a sample transaction to ERCOT External Web Services Listener Prior to this test QSE’s using External Web Services will need to have their network and security teams make the following changes: –QSE Listener must be on port 443 using one of the following Certificate Authorities Verisign Thawte Entrust Equifax

17. Lead from the front Texas Nodal http://nodal.ercot.com 17 DAM/RUC 4.9.1 Testing: Basic Communications Test (“Ping” Test) (continued….) Prior to this test QSE’s using External Web Services will need to have their network and security teams make the following changes: –QSE’s Market System must be able to access: https://nodaleds.ercot.com:80/2007-08/Nodal/eEDS/EWS/ NOTE: this SSL URL is on port 80 NOTE: this is changed from Release 3.5 https://nodaleds.ercot.com:80/2007-08/Nodal/eEDS/EWS/ –QSE’s must be able to receive messages from 66.128.17.136 –QSE’s must be able to send messages to EDS Environment: 66.128.17.32 Sandbox Environment: 66.128.16.84

18. Lead from the front Texas Nodal http://nodal.ercot.com 18 DAM/RUC 4.9.1 Testing: Basic Communications Test (“Ping” Test) (continued….) QSE’s using MIS User Interface will need to have their network and security teams make the following changes: –Must be able to access: MIS URL: https://nodaleds.ercot.com/pps/tibco/mis/ NOTE: MMS User Interface will have link from MIS NOTE: MIS/MMS UI are on port 443https://nodaleds.ercot.com/pps/tibco/mis/

19. Lead from the front Texas Nodal http://nodal.ercot.com 19 DAM/RUC 4.9.1 Testing: Digital Certificates 1 digital certificate w/ a Generic Userid (NODALTEST) will be Generated for Each QSE and Sub-QSE –The MP’s USA does not need to take any action –This is the only certificate that will work in the EDS environment –This certificate will also work in the Nodal Sandbox environment –It will not work in production, MOTE, or any other ERCOT environment –The Digital Certificate will be sent to the MP USA Distribution will occur after the QSE signs up for a Testing Window and Just Prior to the Support Call –(for those requiring the basic communications test, it will be sent prior to that session) All valid ERCOT issued digital certificates will continue to work in the Nodal Sandbox

20. Lead from the front Texas Nodal http://nodal.ercot.com 20 DAM/RUC 4.9.1 Testing: Support Calls Support Calls will be held Monday – Thursday Every Week Support Calls Have 2 Time Slots available 9am – 11am and 1pm – 3pm Fridays are reserved for: –Issue Resolution –Follow-up calls –Market wide status calls Each Testing Date has up to 6 slots Available Calendar will be Posted Weekly on the Readiness Center / EDS 4 / Documents: http://nodal.ercot.com/readiness/eds4/documents/index.html http://nodal.ercot.com/readiness/eds4/documents/index.html

21. Lead from the front Texas Nodal http://nodal.ercot.com 21 DAM/RUC 4.9.1 Testing: Support Calls (continued…) QSE’s using Web Services –Will perform all test scenarios on the web services during support call –Will perform a subset of scenarios on the MIS UI independently within 1 week of support call –Once MIS UI scenarios are complete, QSE will notify ERCOT –ERCOT will validate MIS UI submitted transactions QSE’s using the MIS User Interface –Will perform all test scenarios on MIS User Interface during the support call –Validation will take place on the support call

22. Lead from the front Texas Nodal http://nodal.ercot.com 22 DAM/RUC 4.9.1 Testing: Issue Management Issues encountered on the Support Call will have a high priority Issues encountered during the remainder of the 7 day Test Window should be reported via the ERCOT EDS Issue Submission Form –Form is located at: http://nodal.ercot.com/readiness/eds4/documents/index.html http://nodal.ercot.com/readiness/eds4/documents/index.html –Submit form to eds4@ERCOT.comeds4@ERCOT.com –Internal testing will occur in parallel with all EDS activities MP issues will be logged when submitted MP submitted issues will be compared to internal defects and addressed in parallel –When completing the Issue form, provide: Web Services: the XML files used MIS User Interface: Screen Shots and/or error message Both: The detailed scenario to reproduce the issue

23. Lead from the front Texas Nodal http://nodal.ercot.com 23 DAM/RUC 4.9.1 Testing: Support Call Test Cases * See EDS 4.9.1 DAM / RUC Submissions Test Scripts Document to be posted to readiness 12/21/07 by EOB Reference *Primary QSESub-QSE Create / Query / Update / Cancel (if applicable) CRR OFFERAll Scenarios NOIE / PCRR Holders Only Create Only PTP ObligationAll ScenariosCreate Only Three Part Supply OfferAll Scenarios QSE w/ Resources Only Create Only Capacity TradeAll ScenariosCreate Only Energy TradeAll ScenariosCreate Only AS TradeAll ScenariosCreate Only DAM Energy-Only OfferAll ScenariosCreate Only DAM Energy BidAll ScenariosCreate Only AS Self ArrangementAll Scenarios QSE w/ Load Only Create Only AS OfferAll Scenarios QSE w/ Resources Only Create Only Self ScheduleAll ScenariosCreate Only DC Tie ScheduleAll ScenariosCreate Only

24. Lead from the front Texas Nodal http://nodal.ercot.com 24 DAM/RUC 4.9.1 Tracking: Master Schedule (example)

25. Lead from the front Texas Nodal http://nodal.ercot.com 25 DAM/RUC 4.9.1 Tracking: Preparation Checklist / Schedule This Checklist will be completed by the ERCOT PM and consolidated to the Readiness Scorecard

26. Lead from the front Texas Nodal http://nodal.ercot.com 26 DAM/RUC 4.9.1 Tracking: Readiness Metrics Sign-Up Testing Window Scheduled –QSE signs up by 1/4/2008 – Status is GREEN –QSE’s that have not signed up by 01/04/08 – Will turn Amber until signed up 03/15/08 – Will turn red MP8 - QSE Ability to Submit Transactions Via MIS –Expected completion date March 15 MP9 – QSE Ability to Submit Web Service Transactions –Expected completion date March 15 Execution –MP’s that have met readiness metric M8 or M9 by 3/15/08 are GREEN –MP’s that have attempted readiness metric M8 or M9 by 3/15/08 are AMBER –MP’s that have not yet attempted readiness metric M8 or M9 by 3/15/08 are RED MP16 - MP EDS-4 Trials Participation (phase 2)

27. Lead from the front Texas Nodal http://nodal.ercot.com 27 DAM/RUC 4.9.1 Tracking: Dashboard

28. Lead from the front Texas Nodal http://nodal.ercot.com 28 DAM/RUC 4.9.1 Reference: QSE Activity Summary Email eds4@ercot.com with the information on slide 12 “Sign-up email” by January 4 theds4@ercot.com Use the Nodal Sandbox functionality Download and review the EDS 4 Test Package –Send sample XML to ERCOT no less than 2 weeks prior to Testing Window –Make Modifications (if any) to XML’s that ERCOT provides –Prepare final XML files for Support Call Read and be Familiar with Documents on Next Slide First Friday call will take place on Jan 11th. Refer to the ERCOT Calendar for log- in info and times. Send all questions to eds4@ercot.comeds4@ercot.com

29. Lead from the front Texas Nodal http://nodal.ercot.com 29 DAM/RUC 4.9.1 Reference: Relevant Documents ERCOT Nodal Transition Plan http://nodal.ercot.com/docs/po/pd/ntp/ERCOT_Nodal_Transition_ Plan_110305.doc EDS 4 Approach v1.0http://nodal.ercot.com/readiness/eds4/documents/index.html EDS 4 - DAM/RUC/SASM Market Participant Handbook v1.0 http://nodal.ercot.com/readiness/eds4/documents/index.html EDS 4.9.1 – DAM/RUC/SASM Test Package http://nodal.ercot.com/readiness/eds4/documents/index.html http://nodal.ercot.com/readiness/eds4/documents/index.html (note document to be posted by EOB 12/21/07) Market Management System User Guide To be provided in early Jan ’08 will be posted to readiness center EIP External Interface Specification http://nodal.ercot.com/docs/pd/eip/od/misp/eip_external_interface s_specification_v1_06.zip Explanation of Market Submissions v0.25 http://nodal.ercot.com/readiness/eds4/documents/index.html EDS Issue Submission Form http://nodal.ercot.com/readiness/eds4/documents/r9/ercot_eds_is sue_submission_form.xls

30. Lead from the front Texas Nodal http://nodal.ercot.com 30 Q&A / Open Forum