Directory of Power Plants in Maine
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Ellsworth Hydro Station | Brookfield Black Bear Hydro, LLC | Ellsworth, ME | ISO New England (ISNE) | 18.3 GWh | Jun 1924 | Dec 2025 | Water |
| Stillwater Hydro Station | Brookfield Black Bear Hydro, LLC | Stillwater, ME | ISO New England (ISNE) | 5.9 GWh | Dec 1912 | Dec 2025 | Water |
| Milford Hydro Station | Brookfield Black Bear Hydro, LLC | Milford, ME | ISO New England (ISNE) | 35.9 GWh | Jun 1941 | Dec 2025 | Water |
| West Enfield Hydro | Brookfield Black Bear Hydro, LLC | West Enfield, ME | ISO New England (ISNE) | 70.2 GWh | Mar 1988 | Dec 2025 | Water |
| Medway Hydro | Brookfield Black Bear Hydro, LLC | Medway, ME | ISO New England (ISNE) | 22.9 GWh | Dec 1922 | Dec 2025 | Water |
| Orono Hydro Station | Brookfield Black Bear Hydro, LLC | Orono, ME | ISO New England (ISNE) | 6.2 GWh | Dec 2008 | Dec 2025 | Water |
| Stillwater B | Brookfield Black Bear Hydro, LLC | Old Town, ME | ISO New England (ISNE) | 9.4 GWh | Aug 2013 | Dec 2025 | Water |
| Orono B | Brookfield Black Bear Hydro, LLC | Orono, ME | ISO New England (ISNE) | 17.2 GWh | Oct 2013 | Dec 2025 | Water |
| Brassua Hydroelectric Project | Brassua Hydroelectric LP | Rockwood, ME | ISO New England (ISNE) | 12.6 GWh | Aug 1989 | Aug 2025 | Water |
| Berwick Hubbard Solar 1 | Berwick Hubbard Solar 1, LLC | Berwick, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2024 | 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 |
| Oxford PV - BD Solar Oxford LLC | BD Solar Oxford LLC | Oxford, ME | ISO New England (ISNE) | 12.9 GWh | May 2021 | Dec 2025 | Solar |
| BD Solar Ellsworth LLC | BD Solar Hancock North LLC | Augusta, ME | ISO New England (ISNE) | 9.0 GWh | May 2022 | Dec 2025 | Solar |
| BD Solar Hancock LLC | BD Solar Hancock LLC | Augusta, ME | ISO New England (ISNE) | 11.3 GWh | May 2022 | 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 |
| Augusta PV - BD Solar Augusta LLC | BD Solar Augusta LLC | Augusta, ME | ISO New England (ISNE) | 9.3 GWh | May 2021 | Dec 2025 | Solar |
| Winslow PV - BD Solar 2 LLC | BD Solar 2 LLC | Winslow, ME | ISO New England (ISNE) | 10.3 GWh | Jun 2022 | Dec 2025 | Solar |
| Milo PV - BD Solar 1 LLC | BD Solar 1 LLC | Milo, ME | ISO New England (ISNE) | 24.5 GWh | May 2021 | Dec 2025 | Solar |
| Cenergy - Pulk | BAP Grounded 2 LLC | Sabattus, ME | ISO New England (ISNE) | 7.6 GWh | Nov 2024 | Dec 2025 | Solar |
| Athens Energy | Athens Energy, LLC | Athens, ME | ISO New England (ISNE) | 56.3 GWh | Sep 2016 | Dec 2025 | Wood/Wood Waste Solids |
| SCS Harpswell 012903 Brunswick, LLC | Arevon Energy, Inc. | Brunswick, ME | ISO New England (ISNE) | 7.3 GWh | Oct 2022 | 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 |
| Caribou | Altus Power America Management, LLC | Caribou, ME | ISO New England (ISNE) | 6.2 GWh | Jul 2023 | Dec 2025 | Solar |
| Loring | Altus Power America Management, LLC | Limestone, ME | ISO New England (ISNE) | 8.1 GWh | Apr 2023 | 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 |
| Dynamic - Gray Solar | Altus Power America Management, LLC | Gray, ME | ISO New England (ISNE) | 5.2 GWh | Nov 2024 | 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 |
| Dynamic - Glenburn Broadway One (CSG) | Altus Power America Management, LLC | Glenburn, ME | ISO New England (ISNE) | 6.2 GWh | Oct 2024 | Dec 2025 | Solar |
| Squa Pan Hydro Station | Algonquin Northern Maine | Masardis, ME | (NBSO) | 564.0 MWh | Nov 1941 | Dec 2025 | Water |
| Water Street Solar | AES Distributed Energy | Randolph, ME | ISO New England (ISNE) | 7.2 GWh | Nov 2022 | Dec 2025 | Solar |
| 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 |
| Treasure Lane Solar 1 | AES Clean Energy | Manchester, ME | ISO New England (ISNE) | 7.6 GWh | Apr 2023 | Dec 2025 | Solar |
| Caterpillar Hill | AES Clean Energy | Sedgwick, ME | ISO New England (ISNE) | 8.9 GWh | Nov 2023 | Dec 2025 | Solar |
| Acton | Acton H Road Solar 1, LLC | Acton, ME | ISO New England (ISNE) | 4.7 GWh | Nov 2021 | 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 |