1. EILS Update Paul Wattles, ERCOT Staff DSWG Meeting April 29, 2011

2. 2 Schedule(s) Key dates: EILS UpdateApril 29, 2011 DateAction April 29 (today)Last day to submit ELIDs for June-Sept. May 3Baselines & ELID numbers assigned May 9Offers due May 19Awards announced; contracts sent OngoingTesting, re-testing, reinstatement testing

3. 3 A/S Comparison: Business Hours 1 EILS UpdateApril 29, 2011

4. 4 A/S Comparison: Business Hours 1 EILS UpdateApril 29, 2011

5. 5 A/S Comparison: Business Hours 2 EILS UpdateApril 29, 2011

6. 6 A/S Comparison: Business Hours 2 EILS UpdateApril 29, 2011

7. 7 A/S Comparison: Business Hours 3 EILS UpdateApril 29, 2011

8. 8 A/S Comparison: Business Hours 3 EILS UpdateApril 29, 2011

9. 9 A/S Comparison: Non-Business Hours EILS UpdateApril 29, 2011

10. 10 A/S Comparison: Non-Business Hours EILS UpdateApril 29, 2011

11. 11 Natural Gas Price Index EILS UpdateApril 29, 2011 (Futures are for Henry Hub gas; Source: cmegroup.com) FUTURES: http://www.cmegroup.com/trading/energy/natural-gas/natural-gas.html

12. 12 Procurement Process URL for document describing ERCOT’s process for determining Contract Period cost limits and reasonableness of bids: http://www.ercot.com/content/services/programs/load/eils/keydocs/ERCOT_EILS_Procurement_Process_Revised021309.pdf EILS UpdateApril 29, 2011 DSWG Meeting

13. 13 ERCOT EILS Initiatives NPRR to move EILS deployment earlier in the EEA –Draft originally shown to EILS Subgroup –Posted to today’s meeting page –This can move independently of other NPRRs –Seeking DSWG consensus and possible sponsorship Alternative approach to NPRR 345 (EILS availability post- depletion) –‘Overall Performance Factor’ concept paper posted to today’s meeting page We will work with stakeholders on other issues flowing from Feb. 2 lessons learned EILS UpdateApril 29, 2011

14. 14 ON OFF EILS UpdateApril 29, 2011