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LS Energy Solutions Brings 200‑MW Big Rock Battery Online for CAISO

The Imperial County project meets a 12-year resource adequacy obligation through four-hour delivery at 100 MW.

Overview

  • Commercial operations began September 4, with the site supplying resource adequacy and ancillary services to CAISO.
  • The installation is rated 200 MW/400 MWh and comprises 137 LS-ES AiON-ESS containerized systems designed for two-hour energy blocks.
  • Operators are running the plant at 100 MW deliverability to deliver 400 MWh and satisfy the contract’s four-hour discharge requirement over 12 years.
  • Gore Street Energy Storage Fund purchased the project from Avantus in February 2023, marking GSF’s first asset on the CAISO grid.
  • LS Energy Solutions will provide preventative and capacity maintenance, an extended warranty, and remote monitoring for the life of the project, which is also LS-ES’s largest installation to date and its first on CAISO.