Demand Integration Update to DSWG

1. Demand Integration Update to DSWG ERCOT Emergency Responsive Service (ERS)Report to the Public Utility Commission of Texas for the 2014 ERS Program YearProject No. 27706Attachment B

2. Contents • Procurement Summary Trends • Capacity (MW) offered and procured • Number of ERS Resources (All Service Types) • Cumulative Individual Sites Participating in ERID Process • Detailed Procurement Results by 2014 Standard Contract Terms • Settlement Summary ERS Annual Report

3. Standard Contract Terms & Time Periods • ERS is procured 3 times annually for 4-month Standard Contract Terms • February through May • June through September • October through January • Participants may offer to provide ERS for one or more Time Periods: • Business Hours 1: 8AM to 1PM Monday-Friday* • Business Hours 2: 1PM to 4PM Monday-Friday* • Business Hours 3: 4PM to 8PM Monday-Friday* • Non-Business Hours: All other hours • *Except ERCOT Holidays • Time Periods are designed to allow flexibility for customers during traditional business hours • Time Periods have been in effect in current form since the • June-September 2008 EILS Contract Period ERS Annual Report

4. ERS Procurement Trends (Time and Capacity Weighted) • ERS is procured 3 times annually for 4-month Standard Contract Terms • February through May • June through September • October through January • Participants may offer to provide ERS for one or more Time Periods: • Business Hours 1: 8AM to 1PM Monday-Friday* • Business Hours 2: 1PM to 4PM Monday-Friday* • Business Hours 3: 4PM to 8PM Monday-Friday* • Non-Business Hours: All other hours • *Except ERCOT Holidays • Time Periods are designed to allow flexibility for customers during traditional business hours • Time Periods have been in effect in current form since the • June-September 2008 EILS Contract Period ERS Annual Report

5. ERS Capacity Procurement Trends (Business Hours 1) *Shaded area indicates a single offer stack for all ERS Service Types ERS Annual Report

6. ERS Capacity Procurement Trends (Business Hours 2) *Shaded area indicates a single offer stack for all ERS Service Types ERS Annual Report

7. ERS Capacity Procurement Trends (Business Hours 3) *Shaded area indicates a single offer stack for all ERS Service Types ERS Annual Report

8. ERS Capacity Procurement Trends (Non-Business Hours) *Shaded area indicates a single offer stack for all ERS Service Types ERS Annual Report

9. ERS Procurement Trends (Number of Resources) *Includes all ERS Service Types ERS Annual Report

10. Cumulative Sites (Unique) Participating in ERID Process * JunSep14 value due to Residential Weather Sensitive Resource and OctJan15 value due to Residential participating in Non Weather Sensitive program. ERS Annual Report

11. Demand Integration Update to DSWG 2014 ERS Procurement Results

12. February-May 2014 Standard Contract Term ERS Procurement for the combined offer stack ERS-30 ERS-10 Final Cost for this Standard Contract Term: $ 14,324,315.77 ERS Annual Report

13. June-September 2014 Standard Contract Term ERS Procurement for the combined offer stack Non-Weather Sensitive ERS-30 Non-Weather Sensitive ERS-10 Weather Sensitive ERS-30 Weather Sensitive ERS-10 Final Cost for this Standard Contract Term: $ 19,464,138.73 ERS Annual Report

14. October 2014-January 2015 Standard Contract Term ERS Procurement for the combined offer stack ERS-10 ERS-30 Total Projected Cost for this Standard Contract term: $15,016,201.60 ERS Annual Report

15. 2014 ERS Procurement Overview ERS Annual Report

16. Settlement Summary N/A N/A N/A N/A N/A N/A N/A N/A *Payment reductions due to Availability and Testing Results ERS Annual Report