29th largest plant in Wisconsin · 1882nd nationally
Onion River is a solar power plant in Wisconsin with a nameplate capacity of 150 MW. It generates roughly 2.9k MWh per year — enough to power about 271 average U.S. homes.
Its capacity factor of 0% reflects intermittent or peaking operation.
| Plant Name | Onion River |
|---|---|
| Operator | Wisconsin Power & Light Co |
| City | Sheboygan Cedar Grove |
| County | Sheboygan County |
| State | Wisconsin |
| ZIP | 53013 |
| Coordinates | 43.60020, -87.89659 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| PV1 | Solar Photovoltaic | Solar | 150 MW | Operating | 2023 |
| NERC Region | MRO |
|---|---|
| Balancing Authority | Midcontinent Independent Transmission System Operator, Inc.. |
Utility-scale solar farms convert sunlight directly into electricity using photovoltaic panels. They produce zero direct emissions and have no fuel cost, but generation is variable — peaking at midday and falling to zero at night. Capacity factors typically run 18–28% in good locations.