Construction Started for 120 MW / 480 MWh Battery Energy Storage System in USA

OCI Energy, CPS Energy and their project teams have officially started construction on the Alamo City Battery Energy Storage System (BESS).

The ceremonial groundbreaking commemorated the transition from development to the build phase of one of the largest standalone battery energy storage projects in the region. The project is designed to strengthen how the San Antonio community is served during periods of highest electricity use.

Once completed, the 120 MW / 480 MWh facility will be capable of powering approximately 30,000 homes for up to four hours, delivering critical support during periods of peak demand. By shifting how and when electricity is supplied, the project is designed to help deliver power more efficiently and economically.

OCI Energy developed and financed the Alamo City BESS and will retain ownership under a long‑term storage capacity agreement with CPS Energy, who will have operational control of the facility to serve the San Antonio region when needed.

 ING is providing construction financing, LG Energy Solution Vertech is supplying the battery energy storage technology, and Elgin Power Solutions is serving as the Engineering, Procurement, and Construction contractor.

The BESS facility is expected to enter commercial operation in 2027.