Solar Farms in Montana
Every operating solar farm in Montana on EIA-860M for 2026-07: 9 plants, 10 generating units and 181 MW of nameplate capacity across 8 counties.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Plants
- 9
- 10 generating units
- Nameplate capacity
- 181 MW
- Counties
- 8
- Grid operator
- Mixed
- no single ISO covers a majority
Map of solar farms in Montana
Every one of the 9 plants is drawn at the coordinate EIA files for it.
Loading map…
- Solar · 9
List of solar farms in Montana
Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.
| MTSUNSolar Photovoltaic | Greenbacker Renewable Energy Corporation | Yellowstone | 80 | 1 | 2023 | Operating |
| Apex SolarSolar Photovoltaic | Apex Solar LLC | Beaverhead | 80 | 1 | 2023 | Operating |
| GCC Trident Solar ProjectSolar Photovoltaic | GCC Trident LLC | Gallatin | 4 | 2 | 2022 | Operating |
| South Mills Solar, LLCSolar Photovoltaic | Adapture Renewables, Inc. | Big Horn | 3 | 1 | 2017 | Operating |
| Green Meadow Solar, LLCSolar Photovoltaic | Adapture Renewables, Inc. | Lewis and Clark | 3 | 1 | 2017 | Operating |
| Great Divide Solar, LLCSolar Photovoltaic | Adapture Renewables, Inc. | Lewis and Clark | 3 | 1 | 2017 | Operating |
| Black Eagle Solar, LLCSolar Photovoltaic | Adapture Renewables, Inc. | Cascade | 3 | 1 | 2017 | Operating |
| Magpie Solar, LLCSolar Photovoltaic | Adapture Renewables, Inc. | Golden Valley | 3 | 1 | 2017 | Operating |
| River Bend Solar, LLC (MT)Solar Photovoltaic | Adapture Renewables, Inc. | Stillwater | 2 | 1 | 2017 | Operating |
Largest solar farms in Montana
- 1MTSUNYellowstone County, Montana80 MW
- 2Apex SolarBeaverhead County, Montana80 MW
- 3GCC Trident Solar ProjectGallatin County, Montana4 MW
- 4South Mills Solar, LLCBig Horn County, Montana3 MW
- 5Green Meadow Solar, LLCLewis and Clark County, Montana3 MW
- 6Great Divide Solar, LLCLewis and Clark County, Montana3 MW
- 7Black Eagle Solar, LLCCascade County, Montana3 MW
- 8Magpie Solar, LLCGolden Valley County, Montana3 MW
- 9River Bend Solar, LLC (MT)Stillwater County, Montana2 MW
Solar farms by county in Montana
The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.
| County | Plants | Nameplate MW |
|---|---|---|
| Beaverhead | 1 | 80 |
| Yellowstone | 1 | 80 |
| Lewis and Clark | 2 | 6 |
| Gallatin | 1 | 4 |
| Big Horn | 1 | 3 |
| Cascade | 1 | 3 |
| Golden Valley | 1 | 3 |
| Stillwater | 1 | 2 |
Solar Farms in Montana: FAQ
- How many solar farms are in Montana?
- 9, with 181 MW of nameplate capacity between them, spread over 8 counties. That is the EIA-860M operating count for 2026-07.
- Is there a map of Montana solar farms?
- Yes — the map above. Each dot is one solar farm, sized by nameplate capacity and placed at the coordinates EIA files for it.
- Which is the largest solar farm in Montana?
- MTSUN, at 80 MW. The table is sorted largest first, so the rest follow it.
- Is there a solar farm near me in Montana?
- The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
- Which grid operator runs Montana's solar farms?
- No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Montana is largely a vertically integrated utility rather than an organised market.
- How current is this, and what is left out?
- EIA-860M for 2026-07. Solar photovoltaic and solar thermal, with and without storage. Utility-scale only: EIA-860M starts at 1 MW, so rooftop solar is not here. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.