Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Kola Energy Center San Joaquin County	Elkhorn Battery Energy Storage System Monterey County
Capacity	400 MW	182.5 MW
Technology	Batteries	Batteries
Operator	Kola Energy Storage, LLC	Pacific Gas & Electric Co.
Operating units	2	1
Latest 12-month generation	382.6 GWh	0 MWh
Latest complete-year capacity factor	—	—
National technology rank	#5 of 962	#74 of 962
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.

Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Kola Energy Center San Joaquin County	Elkhorn Battery Energy Storage System Monterey County
Capacity	400 MW	182.5 MW
Technology	Batteries	Batteries
Operator	Kola Energy Storage, LLC	Pacific Gas & Electric Co.
Operating units	2	1
Latest 12-month generation	382.6 GWh	0 MWh
Latest complete-year capacity factor	—	—
National technology rank	#5 of 962	#74 of 962
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.