1. Retail DR and Price Response 2014 Product Headcounts Paul Wattles, ERCOT Market Design & Development DSWG Feb. 3, 2015

2. 2 Background ERCOT has been working with LSEs (REPs and NOIEs) to begin tracking growth of retail product offerings for dynamic pricing and other retail demand response incentives REPs have now provided lists of ESI IDs enrolled in various product types on two snapshot dates: –June 15, 2013 –Sept. 30, 2014 After 2013 experience and dialogue with market participants, we concluded end-of-summer snapshot had more value than early summer snapshot This presentation provides an update on those REP headcounts –Additional analysis, including responses to price events (such as they are) and shifts in behavior by TOU customers, is under way now DSWGFeb. 3, 2015

3. 3 Product types & REP-reported enrollment Feb. 3, 2015DSWG Notes: –170-fold increase in residential Peak Rebate –115% increase in residential Time of Use –123% increase in C&I Real-time Pricing –72% decline in C&I Block & Index Pricing

4. 4 Product enrollment changes - 2013 vs 2014 Feb. 3, 2015DSWG Enrollment changes are independent of reporting REP and 2013 Product Some ESI IDs participating in both 2013 and 2014 changed to a new REP and/or to different product(s) Examples: An ESI ID on REP A’s TOU product who switched to REP B’s PR product would show up in the middle columns An ESI ID that rolled off of all retail DR products by 9/30/14 would show up in left columns An ESI ID new to retail DR products in 2014 would show up in right columns

5. 5 Parting thoughts This is not a pure science; many lines are blurred –As hard as we worked on developing the product definitions, there is still some confusion –REP offerings not necessarily easy to match to the ERCOT categories –REP databases may not be built to track product types through a customer’s history This helps to explain some of the 2013-14 transitions, but makes year-to-year headcount tracking an inexact science Escalates the challenge of assigning product types to ESI IDs in real time under Loads in SCED v2 Proxy $G (if we go that route) DSWGFeb. 3, 2015

6. 6 DSWGFeb. 3, 2015 ON OFF Questions?