Terra-Gen, one of the largest independent integrated renewable energy producers in the United States, has announced the start of commercial operations at its Lockhart CL I and CL II battery energy storage projects in San Bernardino County.
The projects, jointly owned by Masdar and Igneo Infrastructure Partners, are built and co-located with the existing Lockhart solar and battery facilities already in operation. The Lockhart CL I energy storage system provides 69 MW of capacity, while Lockhart CL II adds a further 59.7 MW, bringing the combined capacity to 128.7 MW. The four-hour battery system is capable of supplying electricity to more than 128,000 households during peak demand periods.
Terra-Gen said the lithium-ion battery energy storage facility consists of 164 battery enclosures and connects to Southern California Edison’s Kramer Junction Substation through an existing generation tie line. The project’s resource adequacy capacity has been fully contracted under two long-term resource adequacy agreements with Pacific Gas and Electric Company (PG&E).
Commenting on the milestone, John O’Connor, Chief Executive Officer of Terra-Gen, said the project supports California’s ambitious clean energy targets by strengthening grid reliability while delivering new, clean and affordable energy at scale.
According to Gus Luna, Chief Development Officer at Terra-Gen, the expansion was designed to integrate seamlessly with existing infrastructure, enabling efficient project delivery while meeting high performance and safety standards.
Terra-Gen noted that construction of the new battery storage facilities generated more than 115 jobs at peak activity, with workers completing over 85,000 hours during construction and the transition to operations.
