Hecate Energy Johanna Facility
Battery storage power plant · Orange County, California
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Hecate Energy Johanna Facility LLC
- County
- Orange County
- Generating units
- 2
- Share of state capacity
- 0.02%
- Rank among battery storage plants in California
- #77 of 142
- EIA plant code
- 62889
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| HEGJF | Batteries | 10 MW | 10 MW | 2021 | Operating |
| HJFII | Batteries | 10 MW | 10 MW | 2021 | 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
| Giffen Solar Park | Solar | 20 MW |
| Guernsey Solar Station | Solar | 20 MW |
| Huron Solar Station | Solar | 20 MW |
| Imperial Valley Solar Co (IVSC) 2, LLC | Solar | 20 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 20 MW solar plant and a 20 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