Marin Clean Energy Solar One
Solar power plant · Contra Costa County, California
Nameplate capacity
11 MW
Rank in California
#825
of 1,897 plants
In service since
2017
December 2017
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- AES Distributed Energy
- County
- Contra Costa County
- Generating units
- 1
- Share of state capacity
- 0.01%
- Rank among solar plants in California
- #281 of 937
- EIA plant code
- 61013
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| MCES1 | Solar Photovoltaic | 11 MW | 11 MW | 2017 | 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
| Portal | Hydro | 11 MW |
| Rancho Seco Solar, LLC | Solar | 11 MW |
| North Midway Cogen | Natural gas | 11 MW |
| Narrows PH | Hydro | 10 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 11 MW solar plant and a 11 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