Cottage Grove Project CSG
Solar power plant · Washington County, Minnesota
Nameplate capacity
4.9 MW
Rank in Minnesota
#262
of 804 plants
In service since
2018
October 2018
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Madison Energy Investments LLC
- County
- Washington County
- Generating units
- 1
- Share of state capacity
- 0.02%
- Rank among solar plants in Minnesota
- #89 of 540
- EIA plant code
- 61983
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| COTG | Solar Photovoltaic | 4.9 MW | 4.9 MW | 2018 | 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 Minnesota
| WrightSun CSG, LLC | Solar | 5.0 MW |
| Wyoming 2 CSG, LLC | Solar | 5.0 MW |
| Janesville | Other | 4.9 MW |
| Lind Solar CSG | Solar | 4.9 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 4.9 MW solar plant and a 4.9 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 Minnesota power plants · What Minnesota actually generates