“Utility-scale battery storage capacity in the United States increased significantly during the last three years, with an annual average growth rate of 70%. By the end of 2025, the U.S. power system had operational battery storage capacity of 43.6 gigawatts (GW). During the first six months of 2026, operators added another 8.3 GW of battery storage capacity, reaching nearly 52 GW of nameplate battery storage capacity, based on our latest Preliminary Monthly Electric Generator Inventory.
Operators anticipate bringing an additional 54 GW of battery storage capacity online over the next two and half years, according to plans they report to us. Plans for additional capacity coming online in the second half of this year total 14 GW. Operators currently plan to add 26 GW in 2027 and 14 GW in 2028.”
