Mtn. Solar 4 (CSG)
Jefferson County, Colorado · EIA plant ID 65178 · Operator: Standard Solar
Nameplate2MWSummer 2 MW
Generators1in service
Net generation3GWh12 mo to Dec 2025
Capacity factor25%solar units, summer MW
Heat rate—thermal plants only
First online2021
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) |
|---|---|---|---|
| 2021 | 0.2 | 7.2% | — |
| 2022 | 3.3 | 24.9% | — |
| 2023 | 3.3 | 25.5% | — |
| 2024 | 3.6 | 27.2% | — |
| 2025 | 3.3 | 25.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| MTNS4 | Solar Photovoltaic | PV | 1.5 | 1.5 | Nov 2021 | Operating | — | coming soon |
Owner / operator
Operator: Standard Solar. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Standard Solar | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Colorado Energy Nations Company | 35 MW | 9.5 km |
| Arapahoe Combustion Turbine Project | 194 MW | 11.5 km |
| Jeffco Community Solar Gardens LLC | 1 MW | 15 km |
| Cherokee | 1,006 MW | 15.5 km |
| TruStile Doors - Denver | 1 MW | 16.2 km |
| Metro Wastewater Reclamation District | 15 MW | 16.2 km |