Aidlin Geothermal Power Plant
Other power plant · Sonoma County, California
Nameplate capacity
25 MW
Rank in California
#596
of 1,897 plants
In service since
1989
May 1989
Details
- Primary fuel
- Other
- Technology
- Geothermal
- Operator
- Geysers Power Co LLC
- County
- Sonoma County
- Generating units
- 2
- Share of state capacity
- 0.02%
- Rank among other plants in California
- #47 of 152
- EIA plant code
- 52158
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Geothermal | 13 MW | 9.0 MW | 1989 | Operating |
| GEN2 | Geothermal | 13 MW | 9.0 MW | 1989 | 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
| 85 B | Wind | 25 MW |
| ONeill | Hydro | 25 MW |
| Axium Modesto Solar | Solar | 25 MW |
| Cascade Energy Storage, LLC | Battery storage | 25 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 25 MW solar plant and a 25 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