San Antonio’s New Battery Bet Comes Just as CPS Outages Get Longer
OCI Energy and CPS Energy have started construction on a 120-megawatt battery storage project in southeastern Bexar County, moving a long-planned grid resource into the build phase as San Antonio’s public utility deals with longer outages and rising power demand. The Alamo City Battery Energy Storage System, or BESS, is meant to charge when power is available and discharge when electricity demand is high. The timing is the point. CPS Energy’s own board materials show average customer outage duration rose to 75.38 minutes in calendar 2025, missing a 64.15-minute target, while more frequent storms, equipment failures and safety-related circuit shutdowns hurt performance.