Directory of Power Plants in Maine
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Market Street Gardiner Solar, LLC | REA Investments, LLC | Gardiner, ME | ISO New England (ISNE) | 5.9 GWh | Jun 2022 | Dec 2025 | Solar |
| North Nobleboro Road, LLC | REA Investments, LLC | Waldoboro, ME | ISO New England (ISNE) | 4.0 GWh | May 2021 | Dec 2025 | Solar |
| Nutting Ridge Solar, LLC | REA Investments, LLC | Otisfield, ME | ISO New England (ISNE) | 6.8 GWh | May 2023 | Dec 2025 | Solar |
| Perkins Road Belfast Solar, LLC | REA Investments, LLC | Belfast, ME | ISO New England (ISNE) | 8.7 GWh | May 2021 | 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 |
| Searsmont Road Lincolnville Solar, LLC | REA Investments, LLC | Lincolnville, ME | (NBSO) | 2.4 GWh | Mar 2022 | Dec 2025 | Solar |
| Sheridan Road Solar Farm | REA Investments, LLC | Ashland, ME | ISO New England (ISNE) | 4.2 GWh | Jul 2024 | Dec 2025 | Solar |
| Skyway Avenue Solar Farm | REA Investments, LLC | Frenchville, ME | ISO New England (ISNE) | 2.7 GWh | Feb 2024 | Dec 2025 | Solar |
| Dairy Farm | Greenbacker Renewable Energy Corporation | Anson, ME | ISO New England (ISNE) | 6.1 GWh | Sep 2024 | Dec 2025 | Solar |
| Lebanon CSG LLC | Dimension Energy LLC | Lebanon, ME | ISO New England (ISNE) | 6.2 GWh | Nov 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 |
| 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 |
| Bates College Skowhegan | Westbound Solar 3, LLC | Skowhegan, ME | ISO New England (ISNE) | 8.4 GWh | Aug 2023 | Dec 2025 | Solar |
| Wymans Deblois | REC RWD, LLC | Deblois, ME | (NBSO) | 7.8 GWh | Sep 2024 | Dec 2025 | Solar |
| ME CDG 004 | ME CDG 004 LLC | Bangor, ME | ISO New England (ISNE) | 3.0 GWh | Nov 2024 | Dec 2025 | Solar |
| ME CDG 005 | ME CDG 005 LLC | Veazie, ME | ISO New England (ISNE) | 2.8 GWh | Nov 2024 | 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 |
| MD - EDFR - Phase II - Lewiston | Hayworth Solar Partners, LLC | Lewiston, ME | ISO New England (ISNE) | 7.7 GWh | Oct 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 |
| Roosevelt Trail | Madison Energy Investments LLC | Windham, ME | ISO New England (ISNE) | 1.4 GWh | Nov 2024 | Dec 2025 | Solar |
| SP-339 Mechanic Falls | Madison Energy Investments LLC | Mechanic Falls, ME | ISO New England (ISNE) | 1.4 GWh | Nov 2024 | 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 |
| MEVS Clark LLC | MEVS Clark LLC | Bingham, ME | ISO New England (ISNE) | 6.4 GWh | Sep 2023 | Dec 2025 | Solar |
| Broadhead | Madison Energy Investments LLC | Waterville, ME | ISO New England (ISNE) | 7.2 GWh | Feb 2023 | Dec 2025 | Solar |
| MEVS Waterhouse | MEVS LLC | Scarborogh, ME | ISO New England (ISNE) | 3.1 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 |
| Berwick Hubbard Solar 1 | Berwick Hubbard Solar 1, LLC | Berwick, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2024 | Dec 2025 | Solar |
| Hydro Kennebec Project | Hydro Kennebec LLC | Winslow, ME | ISO New England (ISNE) | 36.8 GWh | Dec 1988 | Nov 2025 | Water |
| Brassua Hydroelectric Project | Brassua Hydroelectric LP | Rockwood, ME | ISO New England (ISNE) | 12.6 GWh | Aug 1989 | Aug 2025 | Water |
| 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% |
| Gardiner | KEI (Maine) Power Management (III) LLC | Gardiner, ME | ISO New England (ISNE) | 4.1 GWh | Jun 1985 | Jun 2025 | Water |
| Woodland Pulp, LLC | Woodland Pulp LLC | Baileyville, ME | (NBSO) | 381.5 GWh | May 1906 | Dec 2024 | Black Liquor : 50.1% Natural Gas : 29.3% Water : 12.3% Wood/Wood Waste Solids : 8.3% |
| Solar Mule, LLC | Solar Mule, LLC | Oakland, ME | ISO New England (ISNE) | 2.0 GWh | Aug 2017 | Dec 2024 | Solar |
| IOS - MEW Phase 1 | Madison Energy Holdings LLC | Madison, ME | ISO New England (ISNE) | 1.0 GWh | Dec 2016 | Dec 2024 | Solar |
| Georges River Energy | Robbins Lumber Inc | Searsmont, ME | ISO New England (ISNE) | 51.9 GWh | Nov 2018 | Dec 2024 | Wood/Wood Waste Solids |
| Waterboro | Madison Energy Investments LLC | East Waterboro, ME | ISO New England (ISNE) | 3.3 GWh | Jun 2023 | Dec 2024 | 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 |