Zinger Key Points Sunrun Flex Texas customers can now lock in fixed power rates and top-tier solar sellback credits via Tesla Electric. Plan includes Tesla Powerwall backup with auto-engage during outages and access to Tesla’s Virtual Power Plant. on Thursday unveiled a new home energy plan in collaboration with Tesla, Inc.’s TSLA Tesla Electric, aimed at maximizing solar output, battery backup and grid independence for Texas residents enrolled in Sunrun Flex. Both companies are offering what they claim to be a low, fixed-rate power plan with sell back credits for excess solar generation, simplifying an often-confusing Texas market. Subscribers receive predictable monthly bills and optimized battery settings, while Tesla manages rate alignment and solar crediting to ensure peak value from home solar systems.