McDonough Solar 1, LLC CSG
Solar power plant · McDonough County, Illinois
Nameplate capacity
4.0 MW
Rank in Illinois
#256
of 580 plants
In service since
2020
December 2020
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- McDonough Solar 1, LLC
- County
- McDonough County
- Generating units
- 2
- Share of state capacity
- 0.01%
- Rank among solar plants in Illinois
- #89 of 383
- EIA plant code
- 64201
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| MC1B | Solar Photovoltaic | 2.0 MW | 2.0 MW | 2020 | Operating |
| MCDH | Solar Photovoltaic | 2.0 MW | 2.0 MW | 2020 | 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 Illinois
| Essex Solar | Solar | 4.0 MW |
| IL Joliet 1101 Cherry Hl Rd | Solar | 4.0 MW |
| Rock Cut Solar | Solar | 4.0 MW |
| IGS Stockton DG CSG | Solar | 3.8 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 4.0 MW solar plant and a 4.0 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 Illinois power plants · What Illinois actually generates