Directory of Power Plants in Maine
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Lebanon CSG LLC | Dimension Energy LLC | Lebanon, ME | ISO New England (ISNE) | 64.0 MWh | Nov 2024 | Dec 2024 | Solar |
| Limestone CSG 2 LLC | Limestone CSG 2 LLC | Limestone, ME | ISO New England (ISNE) | 62.0 MWh | Oct 2024 | Dec 2024 | Solar |
| ME - Novel (Lighthouse Ph I) Mars Hill | Mars Hill Road Solar Farm, LLC | Westfield, ME | ISO New England (ISNE) | 22.0 MWh | Jul 2024 | Dec 2024 | Solar |
| Indeck Jonesboro Energy Center | 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% |
| Limestone CSG 1 LLC | Limestone CSG 1 LLC | Limestone, ME | ISO New England (ISNE) | 5.0 MWh | Nov 2024 | Dec 2024 | Solar |
| Missile Street (CSG) | Nautilus Solar Solutions | Presque Island, ME | ISO New England (ISNE) | 4.0 MWh | Nov 2024 | Dec 2024 | Solar |
| Mechanic Street (CSG) | Nautilus Solar Solutions | Presque Island, ME | ISO New England (ISNE) | 3.0 MWh | Nov 2024 | Dec 2024 | Solar |
Browse Power Plants By Maine Counties
Figures are based on March 2026 generation numbers.| County | State Rank | Active Plants | Mar 2026 Generation |
|---|---|---|---|
| Cumberland County, ME | # 1 | 22 | 4.1 TWh |
| Penobscot County, ME | # 2 | 47 | 3.8 TWh |
| Somerset County, ME | # 3 | 36 | 1.6 TWh |
| Oxford County, ME | # 4 | 21 | 1.6 TWh |
| Washington County, ME | # 5 | 9 | 896.3 GWh |
| Androscoggin County, ME | # 6 | 29 | 756.3 GWh |
| Franklin County, ME | # 7 | 16 | 718.4 GWh |
| Aroostook County, ME | # 8 | 32 | 598.2 GWh |
| County | State Rank | Active Plants | Mar 2026 Generation |
|---|---|---|---|
| Piscataquis County, ME | # 9 | 4 | 509.1 GWh |
| Hancock County, ME | # 10 | 14 | 474.1 GWh |
| Waldo County, ME | # 11 | 9 | 263.8 GWh |
| York County, ME | # 12 | 22 | 259.7 GWh |
| Kennebec County, ME | # 13 | 27 | 198.0 GWh |
| Sagadahoc County, ME | # 14 | 5 | 63.5 GWh |
| Knox County, ME | # 15 | 5 | 22.0 GWh |
| Lincoln County, ME | # 16 | 4 | 18.4 GWh |