In the United States, cumulative utility–scale battery storage capacity exceeded 26 gigawatts (GW) in 2024, according to our January 2025 Preliminary Monthly Electric Generator Inventory. Generators added 10.4 GW of new battery storage capacity in 2024, the second–largest generating capacity addition after solar. Even though battery storage capacity is growing fast, in 2024 it was only 2% of the 1,230 GW of utility–scale electricity generating capacity in the United States.