Greenfield
La Crosse County, Wisconsin · EIA plant ID 69490 · Operator: OneEnergy, Inc.
Nameplate3MWSummer 3 MW
Generators1in service
Net generation0GWh12 mo to Dec 2025
Capacity factor5%solar units, summer MW
Heat rate—thermal plants only
First online2025
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2025 | 0.2 | 5.5% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| GRNFD | Solar Photovoltaic | PV | 2.5 | 2.5 | Nov 2025 | Operating | — | coming soon |
Owner / operator
Operator: OneEnergy, Inc.. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| OneEnergy, Inc. | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| French Island | 188 MW | 17.3 km |
| Onalaska Campus Landfill Biogas | 1 MW | 17.4 km |
| Genoa | retired | 22.2 km |
| Cashton Greens Wind Farm | 5 MW | 23.1 km |
| Cashton Solar | 2 MW | 23.1 km |
| FastSun 5 CSG | 1 MW | 23.2 km |