How many battery storage projects are in California?

California has 283 operating utility-scale battery storage projects with 17 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest battery storage project in California?

Menifee Power Bank in Riverside County, California is the largest, at 680 MW. It came online in 2025.

How many battery storage projects were built in California in 2025?

51 battery storage projects came online in California in 2025, with 4,027 MW of capacity.

Who is developing battery storage projects in California?

Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

Battery storage projects in California

California has 283 operating battery storage projects with 17 GW of capacity. 51 came online in 2025.

Operating283

See planned battery storage projects in California

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

California had 10 battery storage projects online in 2016 and 283 in 2026

113

148

201

252

283

2016’162017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

Battery storage projects online at the end of each year. Source: EIA-860M, compiled by Cleanview.

The 10 largest battery storage projects in California

Operating, by capacity

#	Battery storage project	County	Year online	Capacity
1	Menifee Power Bank	Riverside County	2025	680 MW
2	Bellefield Solar and Energy Storage Farm	Kern County	2025	500 MW
3	Dynegy Moss Landing Power Plant Hybrid	Monterey County	2023	450 MW
4	Kola Energy Center	San Joaquin County	2025	400 MW
5	Easley Solar	Riverside County	2026	350 MW
6	Crimson	Riverside County	2022	350 MW
7	Desert Peak Energy Storage I	Riverside County	2023	325 MW
8	Nighthawk Energy Storage, LLC	San Diego County	2026	300 MW
9	Gateway Energy Storage System	San Diego County	2020	250 MW
10	Rexford Solar Farm	Tulare County	2025	240 MW

Battery storage projects that came online most recently in California

Newest first

#	Battery storage project	County	Year online	Capacity
1	Gonzaga Ridge Battery Facility	Merced County	2026	52 MW
2	Merced 2 BESS	Merced County	2026	2 MW
3	Aramis I Solar Project	Alameda County	2026	100 MW
4	Grayson	Los Angeles County	2026	75 MW
5	Pacifico Power Lancaster 01	Los Angeles County	2026	1 MW
6	Pacifico Power Palmdale 01	Los Angeles County	2026	1 MW
7	Pastoria Power Bank	Kern County	2026	80 MW
8	Aratina Solar Center 1A	San Bernardino County	2026	75 MW
9	Deer Creek Hybrid	Tulare County	2026	51 MW
10	Aratina Solar Center 1B	San Bernardino County	2026	50 MW

The developer behind each project is on paid plans. See plans

How Cleanview tracks battery storage projects

Operating battery storage projects come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about battery storage projects in California

How many battery storage projects are in California?: California has 283 operating utility-scale battery storage projects with 17 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest battery storage project in California?: Menifee Power Bank in Riverside County, California is the largest, at 680 MW. It came online in 2025.
How many battery storage projects were built in California in 2025?: 51 battery storage projects came online in California in 2025, with 4,027 MW of capacity.
Who is developing battery storage projects in California?: Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.