Directory of Power Plants in Maine
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Great Lakes Hydro America - ME | Great Lakes Hydro America LLC | Millinocket, ME | ISO New England (ISNE) | 500.1 GWh | Jun 1917 | Dec 2025 | Water |
| Our Katahdin | Greenbacker Renewable Energy Corporation | Millenocket, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2024 | Dec 2025 | Solar |
| Milford Hydro Station | Brookfield Black Bear Hydro, LLC | Milford, ME | ISO New England (ISNE) | 35.9 GWh | Jun 1941 | Dec 2025 | Water |
| Medway Hydro | Brookfield Black Bear Hydro, LLC | Medway, ME | ISO New England (ISNE) | 22.9 GWh | Dec 1922 | Dec 2025 | Water |
| SP-339 Mechanic Falls | Madison Energy Investments LLC | Mechanic Falls, ME | ISO New England (ISNE) | 1.4 GWh | Nov 2024 | Dec 2025 | Solar |
| Mechanic Falls | KEI (Maine) Power Management (IV) LLC | Mechanic Falls, ME | ISO New England (ISNE) | 1.9 GWh | Mar 1986 | Dec 2025 | Water |
| Squa Pan Hydro Station | Algonquin Northern Maine | Masardis, ME | (NBSO) | 564.0 MWh | Nov 1941 | Dec 2025 | Water |
| BNRG Masardis (CSG) | Nautilus Solar Solutions | Masardis, ME | ISO New England (ISNE) | 4.5 GWh | Nov 2024 | Dec 2025 | Solar |
| Mars Hill Wind Farm Project | Evergreen Wind, LLC | Mars Hill, ME | (NBSO) | 128.3 GWh | Feb 2007 | Dec 2025 | Wind |
| Mars Hill | Greenbacker Renewable Energy Corporation | Mars Hill, ME | ISO New England (ISNE) | 3.8 GWh | Oct 2024 | Dec 2025 | Solar |
| Treasure Lane Solar 1 | AES Clean Energy | Manchester, ME | ISO New England (ISNE) | 7.6 GWh | Apr 2023 | Dec 2025 | Solar |
| Anson Abenaki Hydros | Eagle Creek Renewable Energy, LLC | Madison, ME | ISO New England (ISNE) | 100.6 GWh | Dec 1949 | Dec 2025 | Water |
| IOS - MEW Phase 1 | Madison Energy Holdings LLC | Madison, ME | ISO New England (ISNE) | 1.0 GWh | Dec 2016 | Dec 2024 | Solar |
| Dynamic Madison (CSG) | MN8 Energy LLC | Madison, ME | ISO New England (ISNE) | 9.5 GWh | Jul 2022 | Dec 2025 | Solar |
| Twin Rivers Paper Co LLC | Twin Rivers Paper Co LLC | Madawaska, ME | (NBSO) | 102.8 GWh | Apr 1987 | May 2026 | Purchased Steam |
| Pumpkin Hill | KEI (Maine) Power Management (II) LLC | Lowell, ME | ISO New England (ISNE) | 2.9 GWh | Feb 1987 | Dec 2025 | Water |
| International Paper Livermore Hydro | Eagle Creek Renewable Energy, LLC | Livermore Falls, ME | ISO New England (ISNE) | 24.2 GWh | Dec 1909 | Dec 2025 | Water |
| ReEnergy Livermore Falls | ReEnergy Livermore Falls | Livermore Falls, ME | ISO New England (ISNE) | 273.8 GWh | Jul 1992 | Dec 2025 | Wood/Wood Waste Solids |
| Livermore Falls CSG | Livermore Falls CSG, LLC | Livermore Falls, ME | ISO New England (ISNE) | 4.3 GWh | Apr 2022 | Dec 2025 | Solar |
| Otis Hydro | Eagle Creek Renewable Energy, LLC | Livermore Falls, ME | ISO New England (ISNE) | 38.0 GWh | Dec 1984 | May 2026 | Water |
| Worumbo Hydro Station | Eagle Creek Renewable Energy, LLC | Lisbon Falls, ME | ISO New England (ISNE) | 74.3 GWh | Jan 1989 | Dec 2025 | Water |
| Searsmont Road Lincolnville Solar, LLC | REA Investments, LLC | Lincolnville, ME | (NBSO) | 2.4 GWh | Mar 2022 | 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 |
| Limestone CSG 2 LLC | Limestone CSG 2 LLC | Limestone, ME | ISO New England (ISNE) | 4.8 GWh | Oct 2024 | Dec 2025 | Solar |
| Loring | Altus Power America Management, LLC | Limestone, ME | ISO New England (ISNE) | 8.1 GWh | Apr 2023 | 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 |
| Charles E Monty | Brookfield White Pine Hydro LLC | Lewiston, ME | ISO New England (ISNE) | 114.4 GWh | Dec 1989 | Dec 2025 | Water |
| MD - EDFR - Phase II - Lewiston | Hayworth Solar Partners, LLC | Lewiston, ME | ISO New England (ISNE) | 7.7 GWh | Oct 2024 | Dec 2025 | Solar |
| Lisbon Street Solar | NextGrid Cliffrose, LLC | Lewiston, ME | ISO New England (ISNE) | 2.7 GWh | Mar 2022 | Dec 2025 | Solar |
| Merrill Road Solar | NextGrid Mangrove, LLC | Lewiston, ME | ISO New England (ISNE) | 6.3 GWh | Feb 2022 | Dec 2025 | Solar |
| Gulf Island | Brookfield White Pine Hydro LLC | Lewiston, ME | ISO New England (ISNE) | 115.0 GWh | Dec 1925 | Dec 2025 | Water |
| Dynamic - Leeds Solar (CSG) | Nautilus Solar Solutions | Leeds, ME | ISO New England (ISNE) | 8.8 GWh | Oct 2024 | Dec 2025 | Solar |
| Walden Solar Maine V | Walden Solar Maine V LLC | Leeds, ME | ISO New England (ISNE) | 35.9 GWh | Nov 2024 | Dec 2025 | Solar |
| Lebanon CSG LLC | Dimension Energy LLC | Lebanon, ME | ISO New England (ISNE) | 6.2 GWh | Nov 2024 | Dec 2025 | Solar |
| Lebanon West Lebanon Solar 1 | Lebanon West Lebanon Solar 1, LLC | Lebanon, ME | ISO New England (ISNE) | 3.5 GWh | Nov 2024 | Dec 2025 | Solar |
| NE Renewable Power Jonesboro | Stored Solar J&WE | Jonesboro, ME | ISO New England (ISNE) | 16.0 MWh | Nov 1987 | Jun 2025 | Gaseous Propane : 66.7% Wood/Wood Waste Solids : 33.3% |
| International Paper Riley Hydro | Eagle Creek Renewable Energy, LLC | Jay, ME | ISO New England (ISNE) | 19.7 GWh | Nov 1981 | Dec 2025 | Water |
| International Paper Jay Hydro | Eagle Creek Renewable Energy, LLC | Jay, ME | ISO New England (ISNE) | 11.7 GWh | Dec 1911 | Dec 2025 | Water |
| Corkwood Solar (CSG) | NextGrid Corkwood, LLC | Howland, ME | ISO New England (ISNE) | 5.8 GWh | Oct 2023 | Dec 2025 | Solar |
| Bonny Eagle | Brookfield White Pine Hydro LLC | Hollis, ME | ISO New England (ISNE) | 31.3 GWh | Dec 1909 | Dec 2025 | Water |
| Hiram | Brookfield White Pine Hydro LLC | Hiram, ME | ISO New England (ISNE) | 31.3 GWh | Dec 1916 | Dec 2025 | Water |
| Hartland Solar | Madison Energy Holdings LLC | Hartland, ME | ISO New England (ISNE) | 6.5 GWh | Nov 2021 | Dec 2025 | Solar |
| Harmony Solar (ME) | Maine DG Solar Harmony, LLC | Harmony, ME | ISO New England (ISNE) | 9.0 GWh | Jul 2022 | Dec 2025 | Solar |
| BWC Jimmie Pond | Navisun LLC | Hampden, ME | ISO New England (ISNE) | 3.3 GWh | Nov 2024 | Dec 2025 | Solar |
| Passadumkeag Windpark LLC | Southern Power Co | Greenbush, ME | ISO New England (ISNE) | 137.9 GWh | Jun 2016 | May 2026 | Wind |
| Dynamic - Gray Solar | Altus Power America Management, LLC | Gray, ME | ISO New England (ISNE) | 5.2 GWh | Nov 2024 | Dec 2025 | Solar |
| Shaker | Nautilus Solar Solutions | Gray, ME | ISO New England (ISNE) | 6.2 GWh | Jun 2022 | Dec 2025 | Solar |
| Valley Sun Solar | Valley Sun Solar LLC | Grand Isle, ME | ISO New England (ISNE) | 3.1 GWh | Nov 2024 | Dec 2025 | Solar |
| Gorham Solar 1 (CSG) | CleanCapital Holdings | Gorham, ME | ISO New England (ISNE) | 6.6 GWh | Oct 2023 | Dec 2025 | Solar |
| North Gorham | Brookfield White Pine Hydro LLC | Gorham, ME | ISO New England (ISNE) | 6.5 GWh | Dec 1924 | Dec 2025 | Water |
| Dynamic - Glenburn Broadway One (CSG) | Altus Power America Management, LLC | Glenburn, ME | ISO New England (ISNE) | 6.2 GWh | Oct 2024 | Dec 2025 | Solar |
| Market Street Gardiner Solar, LLC | REA Investments, LLC | Gardiner, ME | ISO New England (ISNE) | 5.9 GWh | Jun 2022 | Dec 2025 | Solar |
| Gardiner | KEI (Maine) Power Management (III) LLC | Gardiner, ME | ISO New England (ISNE) | 4.1 GWh | Jun 1985 | Jun 2025 | Water |
| Fryeburg | Nautilus Solar Solutions | Fryeburg, ME | ISO New England (ISNE) | 9.3 GWh | Apr 2023 | Dec 2025 | Solar |
| Skyway Avenue Solar Farm | REA Investments, LLC | Frenchville, ME | ISO New England (ISNE) | 2.7 GWh | Feb 2024 | Dec 2025 | Solar |
| Beaver Ridge Wind | CPV Beaver Ridge Wind LLC | Freedom, ME | ISO New England (ISNE) | 10.9 GWh | Oct 2008 | Dec 2025 | Wind |
| AES Pelletier Solar, LLC | AES Clean Energy | Fort Kent, ME | (NBSO) | 4.8 GWh | Apr 2023 | Dec 2025 | Solar |
| AES Daigle Solar, LLC | AES Clean Energy | Fort Kent, ME | (NBSO) | 6.4 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 |
| Houlton Road Solar Farm (CSG) | REA Investments, LLC | Fort Fairfield, ME | ISO New England (ISNE) | 2.3 GWh | Nov 2024 | Dec 2025 | Solar |
| Farmington Solar | Farmington Solar, LLC | Farmington, ME | ISO New England (ISNE) | 124.6 GWh | Sep 2021 | May 2026 | Solar |
| Farmington | Madison Energy Investments LLC | Farmington, ME | ISO New England (ISNE) | 7.3 GWh | Nov 2023 | Dec 2025 | Solar |
| Farmingdale FA01 | Nautilus Solar Solutions | Farmingdale, ME | ISO New England (ISNE) | 8.0 GWh | May 2022 | Dec 2025 | Solar |
| Cenergy - Richards (CSG) | Luminace Sunbeam Development Holdings, LLC | Fairfield, ME | ISO New England (ISNE) | 2.1 GWh | Sep 2023 | Dec 2025 | Solar |
| Fairfield PV - BD Solar Fairfield LLC | BD Solar Fairfield LLC | Fairfield, ME | ISO New England (ISNE) | 8.7 GWh | May 2021 | Dec 2025 | Solar |
| Barefoot Solar | Madison Energy Investments LLC | Fairfield, ME | ISO New England (ISNE) | 6.3 GWh | Nov 2022 | 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 |
| Dynamic - Enfield Hammett Road CSG | Altus Power America Management, LLC | Enfield, ME | ISO New England (ISNE) | 8.6 GWh | Aug 2024 | Dec 2025 | Solar |
| Cenergy - Kiger | Luminace Sunbeam Development Holdings, LLC | Embden, ME | ISO New England (ISNE) | 2.0 GWh | Nov 2023 | 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 |
| Mariaville Road Elsworth Solar, LLC | REA Investments, LLC | Ellsworth, ME | ISO New England (ISNE) | 1.3 GWh | Apr 2022 | Dec 2025 | Solar |
| BRNG Nicolin (CSG) | Nautilus Solar Solutions | Ellsworth, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2024 | Dec 2025 | Solar |
| Ellsworth Hydro Station | Brookfield Black Bear Hydro, LLC | Ellsworth, ME | ISO New England (ISNE) | 18.3 GWh | Jun 1924 | Dec 2025 | Water |
| Easton CSG 1 LLC | Easton CSG 1 LLC | Easton, ME | ISO New England (ISNE) | 5.6 GWh | Jan 2024 | Dec 2025 | Solar |
| Bull Hill Wind Project | Evergreen Wind, LLC | Eastbrook, ME | ISO New England (ISNE) | 66.5 GWh | Sep 2012 | Dec 2025 | Wind |
| Waterboro | Madison Energy Investments LLC | East Waterboro, ME | ISO New England (ISNE) | 3.3 GWh | Jun 2023 | Dec 2024 | Solar |
| Wymans Deblois | REC RWD, LLC | Deblois, ME | (NBSO) | 7.8 GWh | Sep 2024 | Dec 2025 | Solar |
| Skelton | Brookfield White Pine Hydro LLC | Dayton, ME | ISO New England (ISNE) | 77.2 GWh | Dec 1947 | Dec 2025 | Water |
| Stetson Wind I | Evergreen Wind, LLC | Danforth, ME | ISO New England (ISNE) | 145.9 GWh | Dec 2008 | Dec 2025 | Wind |
| Stetson Wind II | Evergreen Wind, LLC | Danforth, ME | ISO New England (ISNE) | 55.3 GWh | Feb 2010 | Dec 2025 | Wind |
| Arctaris Saddleback Solar | Arctaris Saddleback Solar, LLC | Dallas Plantation, ME | ISO New England (ISNE) | 7.4 GWh | Oct 2023 | Dec 2025 | Solar |
| Dynamic Corinth (CSG) | MN8 Energy LLC | Corinth, ME | ISO New England (ISNE) | 9.8 GWh | Sep 2022 | Dec 2025 | Solar |
| Downeast Wind | Downeast Wind, LLC | Columbia, ME | ISO New England (ISNE) | 364.0 GWh | Dec 2024 | May 2026 | Wind |
| Pisgah Mountain Wind | Pisgah Mountain, LLC | Clifton, ME | ISO New England (ISNE) | 28.3 GWh | Nov 2016 | Dec 2025 | Wind |
| SP-231 Clifton | Madison Energy Investments LLC | Clifton, ME | ISO New England (ISNE) | 5.4 GWh | Nov 2024 | Dec 2025 | Solar |
| Silver Maple | WEB Silver Maple Wind LLC | Clifton, ME | ISO New England (ISNE) | 63.9 GWh | Sep 2022 | Dec 2025 | Wind |
| Oakfield Wind Project | Onward Energy | City of Oakfield, ME | ISO New England (ISNE) | 339.8 GWh | Sep 2015 | May 2026 | Wind |
| Route 3 China Solar, LLC | REA Investments, LLC | China, ME | ISO New England (ISNE) | 7.6 GWh | Nov 2022 | Dec 2025 | Solar |
| Town House | Nautilus Solar Solutions | Chelsea, ME | ISO New England (ISNE) | 8.3 GWh | Nov 2022 | Dec 2025 | Solar |
| Kibby Wind Facility | Helix Maine Wind Development, LLC | Chain of Ponds, ME | ISO New England (ISNE) | 242.1 GWh | Sep 2009 | May 2026 | Wind |
| Saddleback Ridge Wind Farm | CPV Saddleback Ridge Wind, LLC | Carthage, ME | ISO New England (ISNE) | 90.4 GWh | Nov 2014 | Dec 2025 | Wind |
| ME Novel Lighthouse - Carrabassett | Luminace Sunbeam Development Holdings, LLC | Carrabassett Valley, ME | ISO New England (ISNE) | 7.2 GWh | Nov 2023 | Dec 2025 | Solar |
| Caribou | Altus Power America Management, LLC | Caribou, ME | ISO New England (ISNE) | 6.2 GWh | Jul 2023 | Dec 2025 | Solar |
| Caribou Solar | SoCore Energy LLC | Caribou, ME | ISO New England (ISNE) | 6.2 GWh | Nov 2024 | Dec 2025 | Solar |
| Canton GLC Solar, LLC | REA Investments, LLC | Canton, ME | ISO New England (ISNE) | 4.7 GWh | Mar 2024 | Dec 2025 | Solar |
| Canton Mountain Wind | CPV Canton Mountain Wind LLC | Canton, ME | ISO New England (ISNE) | 56.4 GWh | Oct 2017 | Dec 2025 | Wind |
| West Buxton | Brookfield White Pine Hydro LLC | Buxton, ME | ISO New England (ISNE) | 20.6 GWh | Dec 1903 | Dec 2025 | Water |
| Pittsfield Hydro | KEI (Maine) Power Management (II) LLC | Burnham, ME | ISO New England (ISNE) | 2.7 GWh | Jun 1986 | Dec 2025 | Water |
| Bucksport Generation LLC | Bucksport Generation LLC | Bucksport, ME | ISO New England (ISNE) | 28.8 GWh | Jun 1965 | May 2026 | Natural Gas : 57.8% Distillate Fuel Oil : 42.2% |
| Penobscot Narrows Solar I | Penobscot Narrows Solar I LLC | Bucksport, ME | ISO New England (ISNE) | 7.2 GWh | May 2024 | Dec 2025 | Solar |
Browse Power Plants By Maine Counties
Figures are based on December 2025 generation numbers.| County | State Rank | Active Plants | Dec 2025 Generation |
|---|---|---|---|
| Lincoln County, ME | # 16 | 4 | 21.0 GWh |
| Knox County, ME | # 15 | 5 | 22.2 GWh |
| Sagadahoc County, ME | # 14 | 5 | 65.0 GWh |
| Kennebec County, ME | # 13 | 28 | 209.1 GWh |
| Waldo County, ME | # 12 | 9 | 285.2 GWh |
| York County, ME | # 11 | 25 | 299.8 GWh |
| Hancock County, ME | # 10 | 16 | 483.5 GWh |
| Piscataquis County, ME | # 9 | 4 | 505.6 GWh |
| County | State Rank | Active Plants | Dec 2025 Generation |
|---|---|---|---|
| Aroostook County, ME | # 8 | 32 | 675.2 GWh |
| Franklin County, ME | # 7 | 17 | 756.9 GWh |
| Androscoggin County, ME | # 6 | 31 | 764.6 GWh |
| Washington County, ME | # 5 | 9 | 954.6 GWh |
| Somerset County, ME | # 4 | 37 | 1.6 TWh |
| Oxford County, ME | # 3 | 21 | 1.7 TWh |
| Penobscot County, ME | # 2 | 47 | 2.6 TWh |
| Cumberland County, ME | # 1 | 25 | 4.1 TWh |