Power plants in Winnebago County, Illinois
18 operating power plants in Winnebago County, Illinois, with 520 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Plants
18
Nameplate capacity
520 MW
Net generation, 2025
218 GWh
17 of 18 plants reported
Largest power plants in Winnebago County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | NRG Rockford INatural gas | 316 | 107 | 3.8% |
| 2 | NRG Rockford II Energy CenterNatural gas | 168 | 56.1 | 3.8% |
| 3 | Mondelez Global LLCNatural gas | 4.7 | – | – |
| 4 | Rock Cut SolarSolar | 4.0 | 2.3 | – |
| 5 | Kishwaukee CHP PlantBiomass | 3.0 | 8.9* | 36.8% |
| 6 | Rockford Solar FarmSolar | 2.6 | 3.9 | 17.3% |
| 7 | CED Hilltop SolarSolar | 2.0 | 4.3 | 24.4% |
| 8 | Rockford CSGSolar | 2.0 | 4.1 | 23.3% |
| 9 | Rockford CS 1Solar | 2.0 | 4.2 | 24.0% |
| 10 | Rockford CS 2Solar | 2.0 | 4.1 | 23.6% |
| 11 | Rockford SolarSolar | 2.0 | 3.5 | 20.0% |
| 12 | AES Bend Solar I, LLC CSGSolar | 2.0 | 0.4 | – |
| 13 | Rockford PlantSolar | 2.0 | 2.8 | 16.2% |
| 14 | AES Bend Solar II, LLC CSGSolar | 1.9 | 0.6 | – |
| 15 | Slidematic at RockfordSolar | 1.8 | 3.3 | 21.0% |
| 16 | Machesney ParkSolar | 1.7 | 3.5 | 23.3% |
| 17 | All World Solar FacilitySolar | 1.5 | 3.2 | 24.0% |
| 18 | RocktonHydro | 1.1 | 6.5 | 67.1% |
* Fewer than 12 months of 2025 reported, so the total is partial.
MW is the nameplate capacity of operating generators and batteries. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources
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