Prairie State Solar Project
Solar power plant · Perry County, Illinois
Nameplate capacity
99 MW
Rank in Illinois
#110
of 580 plants
In service since
2021
July 2021
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Prairie State Solar, LLC
- County
- Perry County
- Generating units
- 1
- Share of state capacity
- 0.19%
- Rank among solar plants in Illinois
- #20 of 383
- EIA plant code
- 62420
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| PSS01 | Solar Photovoltaic | 99 MW | 99 MW | 2021 | 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
| Crooked Creek PV I | Solar | 99 MW |
| Dressor Plains Solar, LLC | Solar | 99 MW |
| Hoopeston Wind LLC | Wind | 98 MW |
| Bennington Wind | Wind | 93 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 99 MW solar plant and a 99 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