Big Rock Solar Farm
Battery storage power plant · Imperial County, California
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Big Rock ESS Assets, LLC
- County
- Imperial County
- Generating units
- 1
- Share of state capacity
- 0.19%
- Rank among battery storage plants in California
- #12 of 142
- EIA plant code
- 64636
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 92JTB | Batteries | 200 MW | 200 MW | 2025 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in California
| Raceway Solar & Storage | Solar | 205 MW |
| Great Valley Solar Portfolio Holdings, L | Solar | 203 MW |
| Canyon Power Plant | Natural gas | 200 MW |
| Cathode (Hinson) BESS | Battery storage | 200 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 200 MW solar plant and a 200 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All California power plants · What California actually generates