South Cheyenne Solar
Laramie County, Wyoming · EIA plant ID 67147 · Operator: Southern Power Co
Nameplate150MWSummer 150 MW
Generators1in service
Net generation320GWh12 mo to Aug 2026
Capacity factor24%solar units, summer MW
Heat rate—thermal plants only
First online2024
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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) |
|---|---|---|---|
| 2024 | 242.3 | 24.5% | — |
| 2025 | 322.7 | 24.6% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| SCHY | Solar Photovoltaic | PV | 150 | 150 | Apr 2024 | Operating | — | coming soon |
Owner / operator
Operator: Southern Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Southern Power Co | 100.0% | 150 MW |
Nearby plants
Within 80 km.
| Cheyenne Prairie Generating Station | 140 MW | 11.7 km |
| Roundhouse Renewable Energy II | 106 MW | 18.7 km |
| Corriedale Wind Energy | 53 MW | 19.9 km |
| Happy Jack Windpower Project | 29 MW | 22.4 km |
| Silver Sage Windpower | 42 MW | 23.7 km |
| Bison Solar LLC | 30 MW | 26.8 km |