Oregon has 133 solar farms in the EIA Form 860 database, with a combined installed capacity of 1,005 MW. Of those, 4 plants are utility-scale (50 MW or larger). The largest single facility is Montague Solar in Arlington, Gilliam County — a 162 MW plant operated by Avangrid Power LLC.
Use the interactive Oregon solar farms map below to explore every plant, color-coded by technology type and sized by capacity. Click any solar farm for its name, operator, capacity (MW), technology, and location — or view the full US solar farms interactive map to compare Oregon to every other state.
Type
Capacity
Oregon Solar Farms by the Numbers
- 133 total solar farms in Oregon (EIA Form 860 (US Energy Information Administration), latest reporting period)
- 1,005 MW total installed solar capacity
- 4 utility-scale plants (50 MW or larger)
- 89 small / community-scale plants (under 5 MW)
Oregon Solar Farms by Technology Type
- 133 Solar Photovoltaic (PV) — standard panel installations, the dominant technology nationwide
The 15 Largest Solar Farms in Oregon
The largest solar farm in Oregon by installed capacity is Montague Solar at 162 MW. The 15 largest Oregon solar farms from the latest EIA filing:
| # | Solar Farm | Operator | Capacity | Location |
|---|---|---|---|---|
| 1 | Montague Solar | Avangrid Power LLC | 162 MW | Arlington, Gilliam |
| 2 | Millican Solar Energy LLC | Invenergy Services LLC | 71 MW | Prineville, Crook |
| 3 | Solar Star Oregon II | Avangrid Power LLC | 56 MW | Prineville, Crook |
| 4 | Skysol | Skysol Holdco LLC | 55 MW | Merrill, Klamath |
| 5 | Airport Solar | Airport Solar LLC | 47 MW | Lakeview, Lake |
| 6 | Prineville Solar Energy LLC | Invenergy Services LLC | 46 MW | Prineville, Crook |
| 7 | Baker City Solar | Adapture Renewables, Inc. | 15 MW | Baker City, Baker |
| 8 | OR Solar 6, LLC | Heelstone Energy Holdings, LLC | 10 MW | Lakeview, Lake |
| 9 | Adams Solar Center | GCL New Energy, Inc. | 10 MW | Madras, Jefferson |
| 10 | Elbe Solar Center | GCL New Energy, Inc. | 10 MW | Madras, Jefferson |
| 11 | OR Solar 2, LLC | OR Solar 2, LLC | 10 MW | Eagle Point, Jackson |
| 12 | WyEast Solar | Avangrid Power LLC | 10 MW | Wasco, Sherman |
| 13 | Fort Rock IV | Fort Rock Solar IV LLC | 10 MW | Fort Rock, Lake |
| 14 | OR Solar 8, LLC | Heelstone Energy Holdings, LLC | 10 MW | Dairy, Klamath |
| 15 | OR Solar 3, LLC | Heelstone Energy Holdings, LLC | 10 MW | Malin, Klamath |
Top Solar Operators in Oregon
Five operators account for the largest share of solar generation in Oregon:
- Avangrid Power LLC — 3 plants, 228 MW total
- Invenergy Services LLC — 2 plants, 118 MW total
- Cypress Creek Renewables — 7 plants, 59 MW total
- Heelstone Energy Holdings, LLC — 6 plants, 58 MW total
- Skysol Holdco LLC — 1 plant, 55 MW total
Solar Permitting and Regulation in Oregon
Utility-scale solar in Oregon is overseen by the Oregon Public Utility Commission. Wholesale market participation and interconnection are regulated by the Federal Energy Regulatory Commission (FERC) and the relevant ISO/RTO. All generators above 1 MW must report capacity, fuel type, and location to the EIA via Form 860 — the dataset used in this map.
Frequently Asked Questions
How many solar farms are in Oregon?
Oregon has 133 solar farms in the latest EIA Form 860 filing — a combined 1,005 MW of installed capacity. Of those, 4 are utility-scale (50 MW or larger).
What is the largest solar farm in Oregon?
The largest solar farm in Oregon is Montague Solar, located in Arlington (Gilliam County), with 162 MW of installed capacity. It is operated by Avangrid Power LLC.
How much solar capacity does Oregon have?
Oregon has 1,005 MW of installed solar capacity across 133 plants reporting to the EIA. This counts only the solar portion (Solar_MW field) — co-located batteries and other generation are reported separately.
Who regulates solar farms in Oregon?
Solar farms in Oregon are regulated by the Oregon Public Utility Commission at the state level, with federal oversight from FERC. The EIA collects annual data on every utility-scale solar plant via Form 860.
View all 6,406 US solar farms on the national interactive map
