MTSUN
Yellowstone County, Montana · EIA plant ID 64032 · Operator: Greenbacker Renewable Energy Corporation
Nameplate80MWSummer 80 MW
Generators1in service
Net generation117GWh12 mo to Aug 2026
Capacity factor17%solar units, summer MW
Heat rate—thermal plants only
First online2023
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) |
|---|---|---|---|
| 2023 | 154.2 | 22.0% | — |
| 2024 | 173.9 | 24.7% | — |
| 2025 | 149 | 21.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| MTSUN | Solar Photovoltaic | PV | 80 | 80 | Jan 2023 | Operating | — | coming soon |
Owner / operator
Operator: Greenbacker Renewable Energy Corporation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Greenbacker Renewable Energy Corporation | 100.0% | 80 MW |
Nearby plants
Within 80 km.
| Beartooth Energy Storage LLC | — | 12 km |
| Phillips 66 Billings Refinery | 2 MW | 12.3 km |
| Western Sugar Cooperative - Billings | 2 MW | 12.8 km |
| Yellowstone Energy LP | 68 MW | 14.4 km |
| Yellowstone County Generating Station | 207 MW | 25 km |
| Two Dot Wind Broadview East LLC | 2 MW | 31.7 km |