Coso Finance Partners
Other power plant · Inyo County, California
Nameplate capacity
92 MW
Rank in California
#300
of 1,897 plants
In service since
1987
July 1987
Details
- Primary fuel
- Other
- Technology
- Geothermal
- Operator
- Coso Operating Co LLC
- County
- Inyo County
- Generating units
- 3
- Share of state capacity
- 0.09%
- Rank among other plants in California
- #8 of 152
- EIA plant code
- 10873
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Geothermal | 32 MW | 28 MW | 1987 | Operating |
| GEN2 | Geothermal | 30 MW | 27 MW | 1988 | Operating |
| GEN3 | Geothermal | 30 MW | 27 MW | 1988 | 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
| South Belridge Cogeneration Facility | Natural gas | 94 MW |
| Coachella | Natural gas | 92 MW |
| Hanford Energy Park Peaker | Natural gas | 92 MW |
| Heber Geothermal | Other | 92 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 92 MW solar plant and a 92 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