103rd largest plant in Missouri · 8126th nationally
O'fallon Renewable Energy Center is a solar power plant in Missouri with a nameplate capacity of 4.5 MW. It generates roughly 5.3k MWh per year — enough to power about 500 average U.S. homes.
Its capacity factor of 13% reflects intermittent or peaking operation.
| Plant Name | O'fallon Renewable Energy Center |
|---|---|
| Operator | Union Electric Co - (Mo) |
| City | O'fallon |
| County | St Charles County |
| State | Missouri |
| ZIP | 63366 |
| Coordinates | 38.82665, -90.67812 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| OREC | Solar Photovoltaic | Solar | 4.5 MW | Operating | 2014 |
| NERC Region | SERC |
|---|---|
| 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.