Directory of Power Plants in Maine
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| ME - EDFR - Phase I - Bristol | Overlook Solar Partners, LLC | Bristol, ME | ISO New England (ISNE) | 8.5 GWh | Nov 2023 | Dec 2025 | Solar |
| Cenergy - Wiscasset (CSG) | Luminace Sunbeam Development Holdings, LLC | Wiscasset, ME | ISO New England (ISNE) | 8.4 GWh | Jun 2023 | Dec 2025 | Solar |
| Bates College Skowhegan | Westbound Solar 3, LLC | Skowhegan, ME | ISO New England (ISNE) | 8.4 GWh | Aug 2023 | Dec 2025 | Solar |
| Wells (ME) | Nautilus Solar Solutions | Wells, ME | ISO New England (ISNE) | 8.4 GWh | Jun 2022 | Dec 2025 | Solar |
| Pittsfield Solar (N. Main St) | Maine DG Solar Pittsfield, LLC | Pittsfield, ME | ISO New England (ISNE) | 8.3 GWh | Sep 2023 | Dec 2025 | Solar |
| Town House | Nautilus Solar Solutions | Chelsea, ME | ISO New England (ISNE) | 8.3 GWh | Nov 2022 | Dec 2025 | Solar |
| ME-EDFR-Phase I-Embden | Tower Solar Partners, LLC | Embden, ME | ISO New England (ISNE) | 8.2 GWh | Nov 2023 | Dec 2025 | Solar |
| Palmyra PV - BD Solar Palmyra LLC | BD Solar Palmyra LLC | Palmyra, ME | ISO New England (ISNE) | 8.1 GWh | May 2022 | Dec 2025 | Solar |
| Sanford -NY | Nautilus Solar Solutions | Sanford, ME | ISO New England (ISNE) | 8.1 GWh | Jan 2024 | Dec 2025 | Solar |
| River Road | Norridgewock River Road Solar, LLC | Norridgewock, ME | ISO New England (ISNE) | 8.1 GWh | Feb 2022 | Dec 2025 | Solar |
| Loring | Altus Power America Management, LLC | Limestone, ME | ISO New England (ISNE) | 8.1 GWh | Apr 2023 | Dec 2025 | Solar |
| Fort Fairfield | Standard Solar | Fort Fairfield, ME | ISO New England (ISNE) | 8.1 GWh | Jul 2023 | Dec 2025 | Solar |
| North Bridgton | Nautilus Solar Solutions | Oakland, ME | ISO New England (ISNE) | 8.0 GWh | Oct 2022 | Dec 2025 | Solar |
| Farmingdale FA01 | Nautilus Solar Solutions | Farmingdale, ME | ISO New England (ISNE) | 8.0 GWh | May 2022 | Dec 2025 | Solar |
| MMWAC Resource Recovery Facility | Maine Waste to Energy | Auburn, ME | ISO New England (ISNE) | 7.8 GWh | May 1992 | May 2026 | Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Natural Gas : 1.8% |
| ME-EDFR-Phase I-Woolwich | Green Mile Solar, LLC | Woolwich, ME | ISO New England (ISNE) | 7.8 GWh | Aug 2023 | Dec 2025 | Solar |
| Wymans Deblois | REC RWD, LLC | Deblois, ME | (NBSO) | 7.8 GWh | Sep 2024 | Dec 2025 | Solar |
| Sanford CGA | Nautilus Solar Solutions | Sanford, ME | ISO New England (ISNE) | 7.8 GWh | May 2022 | Dec 2025 | Solar |
| MD - EDFR - Phase II - Lewiston | Hayworth Solar Partners, LLC | Lewiston, ME | ISO New England (ISNE) | 7.7 GWh | Oct 2024 | Dec 2025 | Solar |
| Sabattus SB01 | Nautilus Solar Solutions | Sabattus, ME | ISO New England (ISNE) | 7.7 GWh | Sep 2023 | Dec 2025 | Solar |
| BWC Beech Ridge Brook, LLC | Navisun LLC | Scarborough, ME | ISO New England (ISNE) | 7.7 GWh | Apr 2023 | Dec 2025 | Solar |
| Treasure Lane Solar 1 | AES Clean Energy | Manchester, ME | ISO New England (ISNE) | 7.6 GWh | Apr 2023 | Dec 2025 | Solar |
| Cenergy - Pulk | BAP Grounded 2 LLC | Sabattus, ME | ISO New England (ISNE) | 7.6 GWh | Nov 2024 | Dec 2025 | Solar |
| Route 3 China Solar, LLC | REA Investments, LLC | China, ME | ISO New England (ISNE) | 7.6 GWh | Nov 2022 | Dec 2025 | Solar |
| ME - EDF - Phase II - Belfast | Shining Solar Partners, LLC | Belfast, ME | ISO New England (ISNE) | 7.5 GWh | Aug 2024 | Dec 2025 | Solar |
| BWC Unity Pond LLC | Navisun LLC | Benton, ME | ISO New England (ISNE) | 7.4 GWh | Nov 2023 | Dec 2025 | Solar |
| Arctaris Saddleback Solar | Arctaris Saddleback Solar, LLC | Dallas Plantation, ME | ISO New England (ISNE) | 7.4 GWh | Oct 2023 | Dec 2025 | Solar |
| SCS Harpswell 012903 Brunswick, LLC | Arevon Energy, Inc. | Brunswick, ME | ISO New England (ISNE) | 7.3 GWh | Oct 2022 | Dec 2025 | Solar |
| Standish | Nautilus Solar Solutions | Standish, ME | ISO New England (ISNE) | 7.3 GWh | Sep 2023 | Dec 2025 | Solar |
| Farmington | Madison Energy Investments LLC | Farmington, ME | ISO New England (ISNE) | 7.3 GWh | Nov 2023 | Dec 2025 | Solar |
| Penobscot Narrows Solar I | Penobscot Narrows Solar I LLC | Bucksport, ME | ISO New England (ISNE) | 7.2 GWh | May 2024 | Dec 2025 | Solar |
| Broadhead | Madison Energy Investments LLC | Waterville, ME | ISO New England (ISNE) | 7.2 GWh | Feb 2023 | Dec 2025 | Solar |
| ME Novel Lighthouse - Carrabassett | Luminace Sunbeam Development Holdings, LLC | Carrabassett Valley, ME | ISO New England (ISNE) | 7.2 GWh | Nov 2023 | Dec 2025 | Solar |
| Water Street Solar | AES Distributed Energy | Randolph, ME | ISO New England (ISNE) | 7.2 GWh | Nov 2022 | Dec 2025 | Solar |
| Athens AT01 | Nautilus Solar Solutions | Athens, ME | ISO New England (ISNE) | 7.1 GWh | May 2022 | Dec 2025 | Solar |
| Brewer (CSG) | Nautilus Solar Solutions | Brewer, ME | ISO New England (ISNE) | 7.0 GWh | Jul 2024 | Dec 2025 | Solar |
| Nutting Ridge Solar, LLC | REA Investments, LLC | Otisfield, ME | ISO New England (ISNE) | 6.8 GWh | May 2023 | Dec 2025 | Solar |
| Messalonskee 2 (Oakland) | Messalonskee Stream Hydro LLC | Oakland, ME | ISO New England (ISNE) | 6.8 GWh | Dec 1923 | Dec 2025 | Water |
| Lewiston Junction Road Solar | NextGrid Peppertree, LLC | Poland, ME | ISO New England (ISNE) | 6.8 GWh | Dec 2021 | Dec 2025 | Solar |
| Milo CSG | Milo CSG, LLC | Milo, ME | ISO New England (ISNE) | 6.7 GWh | Jan 2022 | Dec 2025 | Solar |
| Unity Solar | Madison Energy Holdings LLC | Unity, ME | ISO New England (ISNE) | 6.7 GWh | Nov 2021 | Dec 2025 | Solar |
| Dynamic - Wales Leeds Junction Road (CSG) | Altus Power America Management, LLC | Wales, ME | ISO New England (ISNE) | 6.7 GWh | Oct 2024 | Dec 2025 | Solar |
| Gorham Solar 1 (CSG) | CleanCapital Holdings | Gorham, ME | ISO New England (ISNE) | 6.6 GWh | Oct 2023 | Dec 2025 | Solar |
| Church Hill Road Augusta Solar, LLC | REA Investments, LLC | Augusta, ME | ISO New England (ISNE) | 6.5 GWh | Jan 2022 | Dec 2025 | Solar |
| Hartland Solar | Madison Energy Holdings LLC | Hartland, ME | ISO New England (ISNE) | 6.5 GWh | Nov 2021 | Dec 2025 | Solar |
| North Gorham | Brookfield White Pine Hydro LLC | Gorham, ME | ISO New England (ISNE) | 6.5 GWh | Dec 1924 | Dec 2025 | Water |
| MEVS Clark LLC | MEVS Clark LLC | Bingham, ME | ISO New England (ISNE) | 6.4 GWh | Sep 2023 | Dec 2025 | Solar |
| AES Daigle Solar, LLC | AES Clean Energy | Fort Kent, ME | (NBSO) | 6.4 GWh | Apr 2023 | Dec 2025 | Solar |
| Merrill Road Solar | NextGrid Mangrove, LLC | Lewiston, ME | ISO New England (ISNE) | 6.3 GWh | Feb 2022 | Dec 2025 | Solar |
| Broadway Solar (CSG) | NextGrid Bitterbush, LLC | Bangor, ME | ISO New England (ISNE) | 6.3 GWh | Aug 2023 | Dec 2025 | Solar |
| Dynamic - Exeter Solar CSG | Altus Power America Management, LLC | Exeter, ME | ISO New England (ISNE) | 6.3 GWh | Aug 2024 | Dec 2025 | Solar |
| Barefoot Solar | Madison Energy Investments LLC | Fairfield, ME | ISO New England (ISNE) | 6.3 GWh | Nov 2022 | Dec 2025 | Solar |
| Lebanon CSG LLC | Dimension Energy LLC | Lebanon, ME | ISO New England (ISNE) | 6.2 GWh | Nov 2024 | Dec 2025 | Solar |
| Dynamic - Glenburn Broadway One (CSG) | Altus Power America Management, LLC | Glenburn, ME | ISO New England (ISNE) | 6.2 GWh | Oct 2024 | Dec 2025 | Solar |
| Caribou Solar | SoCore Energy LLC | Caribou, ME | ISO New England (ISNE) | 6.2 GWh | Nov 2024 | Dec 2025 | Solar |
| Caribou | Altus Power America Management, LLC | Caribou, ME | ISO New England (ISNE) | 6.2 GWh | Jul 2023 | Dec 2025 | Solar |
| Orono Hydro Station | Brookfield Black Bear Hydro, LLC | Orono, ME | ISO New England (ISNE) | 6.2 GWh | Dec 2008 | Dec 2025 | Water |
| Shaker | Nautilus Solar Solutions | Gray, ME | ISO New England (ISNE) | 6.2 GWh | Jun 2022 | Dec 2025 | Solar |
| Dairy Farm | Greenbacker Renewable Energy Corporation | Anson, ME | ISO New England (ISNE) | 6.1 GWh | Sep 2024 | Dec 2025 | Solar |
| Stillwater Hydro Station | Brookfield Black Bear Hydro, LLC | Stillwater, ME | ISO New England (ISNE) | 5.9 GWh | Dec 1912 | Dec 2025 | Water |
| Market Street Gardiner Solar, LLC | REA Investments, LLC | Gardiner, ME | ISO New England (ISNE) | 5.9 GWh | Jun 2022 | Dec 2025 | Solar |
| Limestone CSG 1 LLC | Limestone CSG 1 LLC | Limestone, ME | ISO New England (ISNE) | 5.9 GWh | Nov 2024 | Dec 2025 | Solar |
| Mainely Solar (Wyman Hill Solar LLC) | Wyman Hill Solar, LLC | Rumford, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2022 | Dec 2025 | Solar |
| Our Katahdin | Greenbacker Renewable Energy Corporation | Millenocket, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2024 | Dec 2025 | Solar |
| Berwick Hubbard Solar 1 | Berwick Hubbard Solar 1, LLC | Berwick, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2024 | Dec 2025 | Solar |
| BRNG Nicolin (CSG) | Nautilus Solar Solutions | Ellsworth, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2024 | Dec 2025 | Solar |
| Corkwood Solar (CSG) | NextGrid Corkwood, LLC | Howland, ME | ISO New England (ISNE) | 5.8 GWh | Oct 2023 | Dec 2025 | Solar |
| Easton CSG 1 LLC | Easton CSG 1 LLC | Easton, ME | ISO New England (ISNE) | 5.6 GWh | Jan 2024 | Dec 2025 | Solar |
| SP-231 Clifton | Madison Energy Investments LLC | Clifton, ME | ISO New England (ISNE) | 5.4 GWh | Nov 2024 | Dec 2025 | Solar |
| 15 Glen Harris RD | ME Sandy River LLC | New Sharon, ME | ISO New England (ISNE) | 5.3 GWh | May 2024 | Dec 2025 | Solar |
| Dynamic - Gray Solar | Altus Power America Management, LLC | Gray, ME | ISO New England (ISNE) | 5.2 GWh | Nov 2024 | Dec 2025 | Solar |
| Washington WS01 | Nautilus Solar Solutions | Washington, ME | ISO New England (ISNE) | 5.1 GWh | May 2022 | Dec 2025 | Solar |
| Ryans Ranch | Nautilus Solar Solutions | Paris, ME | ISO New England (ISNE) | 4.9 GWh | May 2022 | Dec 2025 | Solar |
| ME Novel Lighthouse - Front St. Solar CS | Luminace Sunbeam Development Holdings, LLC | Skowhegan, ME | ISO New England (ISNE) | 4.8 GWh | Apr 2023 | Dec 2025 | Solar |
| Limestone CSG 2 LLC | Limestone CSG 2 LLC | Limestone, ME | ISO New England (ISNE) | 4.8 GWh | Oct 2024 | Dec 2025 | Solar |
| Augusta Road Bowdoin Solar, LLC | REA Investments, LLC | Bowdoin, ME | ISO New England (ISNE) | 4.8 GWh | Jan 2022 | Dec 2025 | Solar |
| Augusta | Maine DG Solar Augusta, LLC | Augusta, ME | ISO New England (ISNE) | 4.8 GWh | Feb 2022 | Dec 2025 | Solar |
| Webb Road Solar | NextGrid Mastic, LLC | Waterville, ME | ISO New England (ISNE) | 4.8 GWh | Aug 2022 | Dec 2025 | Solar |
| AES Pelletier Solar, LLC | AES Clean Energy | Fort Kent, ME | (NBSO) | 4.8 GWh | Apr 2023 | Dec 2025 | Solar |
| Canton GLC Solar, LLC | REA Investments, LLC | Canton, ME | ISO New England (ISNE) | 4.7 GWh | Mar 2024 | Dec 2025 | Solar |
| Acton | Acton H Road Solar 1, LLC | Acton, ME | ISO New England (ISNE) | 4.7 GWh | Nov 2021 | Dec 2025 | Solar |
| Athens Ridge | Greenbacker Renewable Energy Corporation | Athens, ME | ISO New England (ISNE) | 4.7 GWh | Feb 2024 | Dec 2025 | Solar |
| Pleasant Street | Greenbacker Renewable Energy Corporation | Wilton, ME | ISO New England (ISNE) | 4.7 GWh | Nov 2023 | Dec 2025 | Solar |
| ISM Solar Shepherd Acres | Navisun LLC | South Paris, ME | ISO New England (ISNE) | 4.5 GWh | Nov 2024 | Dec 2025 | Solar |
| BWC Maces Pond LLC | Navisun LLC | Rockport, ME | ISO New England (ISNE) | 4.5 GWh | Nov 2021 | Dec 2025 | Solar |
| BNRG Masardis (CSG) | Nautilus Solar Solutions | Masardis, ME | ISO New England (ISNE) | 4.5 GWh | Nov 2024 | Dec 2025 | Solar |
| Livermore Falls CSG | Livermore Falls CSG, LLC | Livermore Falls, ME | ISO New England (ISNE) | 4.3 GWh | Apr 2022 | Dec 2025 | Solar |
| Missile Street (CSG) | Nautilus Solar Solutions | Presque Island, ME | ISO New England (ISNE) | 4.3 GWh | Nov 2024 | Dec 2025 | Solar |
| Sheridan Road Solar Farm | REA Investments, LLC | Ashland, ME | ISO New England (ISNE) | 4.2 GWh | Jul 2024 | Dec 2025 | Solar |
| Mechanic Street (CSG) | Nautilus Solar Solutions | Presque Island, ME | ISO New England (ISNE) | 4.2 GWh | Nov 2024 | Dec 2025 | Solar |
| Gardiner | KEI (Maine) Power Management (III) LLC | Gardiner, ME | ISO New England (ISNE) | 4.1 GWh | Jun 1985 | Jun 2025 | Water |
| ME Novel Lighthouse - Penobscot CSG | Luminace Sunbeam Development Holdings, LLC | Patten, ME | ISO New England (ISNE) | 4.1 GWh | Aug 2024 | Dec 2025 | Solar |
| ME - Novel (Lighthouse Ph I) Mars Hill | Mars Hill Road Solar Farm, LLC | Westfield, ME | ISO New England (ISNE) | 4.1 GWh | Jul 2024 | Dec 2025 | Solar |
| North Nobleboro Road, LLC | REA Investments, LLC | Waldoboro, ME | ISO New England (ISNE) | 4.0 GWh | May 2021 | Dec 2025 | Solar |
| Upper Barker | KEI (Maine) Power Management (III) LLC | Auburn, ME | ISO New England (ISNE) | 4.0 GWh | Apr 1987 | Dec 2025 | Water |
| Madawaska Solar | SoCore Energy LLC | Saint David, ME | ISO New England (ISNE) | 3.9 GWh | Nov 2024 | Dec 2025 | Solar |
| Samoset Solar | Samoset Solar, LLC | Rockport, ME | ISO New England (ISNE) | 3.9 GWh | Jun 2023 | Dec 2025 | Solar |
| ME Novel Lighthouse - Huggard Ave Solar | Luminace Sunbeam Development Holdings, LLC | Limestone, ME | (NA) | 3.9 GWh | Jan 2024 | Dec 2025 | Solar |
| Barker Lower | KEI (Maine) Power Management (III) LLC | Auburn, ME | ISO New England (ISNE) | 3.8 GWh | Mar 1986 | Dec 2025 | Water |
| Mars Hill | Greenbacker Renewable Energy Corporation | Mars Hill, ME | ISO New England (ISNE) | 3.8 GWh | Oct 2024 | Dec 2025 | Solar |
Browse Power Plants By Maine Counties
Figures are based on May 2026 generation numbers.| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Cumberland County, ME | # 1 | 25 | 4.1 TWh |
| Penobscot County, ME | # 2 | 47 | 2.6 TWh |
| Oxford County, ME | # 3 | 21 | 1.7 TWh |
| Somerset County, ME | # 4 | 37 | 1.6 TWh |
| Washington County, ME | # 5 | 9 | 954.6 GWh |
| Androscoggin County, ME | # 6 | 31 | 764.6 GWh |
| Franklin County, ME | # 7 | 17 | 756.9 GWh |
| Aroostook County, ME | # 8 | 32 | 675.2 GWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Piscataquis County, ME | # 9 | 4 | 505.6 GWh |
| Hancock County, ME | # 10 | 16 | 483.5 GWh |
| York County, ME | # 11 | 25 | 299.8 GWh |
| Waldo County, ME | # 12 | 9 | 285.2 GWh |
| Kennebec County, ME | # 13 | 28 | 209.1 GWh |
| Sagadahoc County, ME | # 14 | 5 | 65.0 GWh |
| Knox County, ME | # 15 | 5 | 22.2 GWh |
| Lincoln County, ME | # 16 | 4 | 21.0 GWh |