Rock County Customer Hosted Solar
Rock County, Wisconsin · EIA plant ID 67704 · Operator: Wisconsin Power & Light Co
Nameplate1MWSummer 1 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor17%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 | 1.6 | 17.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| PV1 | Solar Photovoltaic | PV | 1.4 | 1.4 | Apr 2025 | Operating | — | coming soon |
Owner / operator
Operator: Wisconsin Power & Light Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Wisconsin Power & Light Co | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Janesville Community Solar | 2 MW | 0.1 km |
| Ameresco Janesville | 3 MW | 1.7 km |
| North Rock | 50 MW | 11.7 km |
| Sheepskin | retired | 14.3 km |
| Rock River | retired | 15.6 km |
| Riverside Energy Center | 675 MW | 15.6 km |