Directory of Power Plants in Massachusetts
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Kearsarge Montague BD(CSG) | Kearsarge Montague BD LLC | Montague, MA | ISO New England (ISNE) | 3.1 GWh | Oct 2021 | Dec 2025 | Solar |
| Monson Solar | Altus Power America Management, LLC | Monson, MA | ISO New England (ISNE) | 3.8 GWh | Jun 2014 | Dec 2025 | Solar |
| Bowden Solar LLC | 38DN Power Fund 1 LLC | Monson, MA | ISO New England (ISNE) | 3.3 GWh | Feb 2019 | Dec 2025 | Solar |
| Monson Solar, LLC | Monson Solar, LLC | Monson, MA | ISO New England (ISNE) | 3.2 GWh | Jul 2017 | Dec 2025 | Solar |
| Millis MA 1 | Millis MA 1 LLC | Millis, MA | ISO New England (ISNE) | 1.5 GWh | Oct 2018 | Dec 2025 | Solar |
| Montague Site 36-Grosolar | NSTAR Electric Company | Millers Falls, MA | ISO New England (ISNE) | 5.7 GWh | Sep 2018 | Aug 2026 | Solar |
| Wheelabrator Millbury Facility | Wheelabrator Environmental Systems | Millbury, MA | ISO New England (ISNE) | 288.1 GWh | Aug 1987 | Aug 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Millbury Solar | Evergreen Wind, LLC | Millbury, MA | ISO New England (ISNE) | 4.7 GWh | Mar 2014 | Dec 2025 | Solar |
| 3Colton | Madison Energy Holdings LLC | Millbury, MA | ISO New England (ISNE) | 4.9 GWh | Jun 2023 | Dec 2025 | Solar |
| Syncarpha Millbury Hybrid (CSG) | Syncarpha Millbury, LLC | Millbury, MA | ISO New England (ISNE) | 8.0 GWh | Sep 2022 | Dec 2025 | Solar |
| Millbury MA #1092 | Millbury MA #1092 LLC | Millbury, MA | ISO New England (ISNE) | 1.6 GWh | May 2019 | Dec 2025 | Solar |
| Milford Power LP | Milford Power LLC | Milford, MA | ISO New England (ISNE) | 253.3 GWh | Feb 1993 | Dec 2025 | Natural Gas |
| Middleton Solar Park | Novis Renewables, LLC | Middleton, MA | ISO New England (ISNE) | 6.6 GWh | May 2018 | Dec 2025 | Solar |
| 115 G Fisher | Greenbacker Renewable Energy Corporation | Middleborough, MA | ISO New England (ISNE) | 1.5 GWh | Sep 2015 | Dec 2025 | Solar |
| Cranberry Solar | GWE Cranberry Solar RT, LLC | Middleborough, MA | ISO New England (ISNE) | 1.7 GWh | Nov 2016 | Dec 2025 | Solar |
| 154 D Fisher | Greenbacker Renewable Energy Corporation | Middleborough, MA | ISO New England (ISNE) | 1.6 GWh | Nov 2015 | Dec 2025 | Solar |
| Danton XI Solar LLC | Danton XI Solar LLC | Methuen, MA | ISO New England (ISNE) | 1.8 GWh | Dec 2013 | Dec 2025 | Solar |
| Ayers Village Solar | Altus Power America Management, LLC | Methuen, MA | ISO New England (ISNE) | 2.8 GWh | May 2014 | Dec 2025 | Solar |
| Aegean Drive Solar | Aegean Drive Solar LLC | Methuen, MA | ISO New England (ISNE) | 2.4 GWh | Aug 2021 | Dec 2025 | Solar |
| Methuen Landfill | CleanCapital Holdings | Methuen, MA | ISO New England (ISNE) | 1.5 GWh | Jun 2013 | Dec 2025 | Solar |
| Merrimac Solar | RWE Clean Energy | Merrimac, MA | ISO New England (ISNE) | 2.0 GWh | Nov 2013 | Dec 2025 | Solar |
| Mendon | BWC Box Pond LLC | Mendon, MA | ISO New England (ISNE) | 3.4 GWh | Nov 2017 | Dec 2025 | Solar |
| BWC Mystic River | BWC Mystic River LLC | Mendon, MA | ISO New England (ISNE) | 1.8 GWh | Jun 2017 | Dec 2025 | Solar |
| BWC Wading River One, Two, Three CSG | Ameresco BWC Wading River LLC | Mendon, MA | ISO New England (ISNE) | 1.6 GWh | Oct 2017 | Dec 2025 | Solar |
| BWC Muddy Brook, LLC Hybrid | AES Distributed Energy | Mendon, MA | ISO New England (ISNE) | 1.9 GWh | Aug 2021 | Dec 2025 | Solar |
| Exelon West Medway II LLC | Constellation Power, Inc | Medway, MA | ISO New England (ISNE) | 228.1 GWh | Feb 2019 | Aug 2026 | Natural Gas : 94.6% Kerosene : 5.4% |
| Medway Grid | Medway Grid LLC | Medway, MA | ISO New England (ISNE) | 18.4 GWh | - | Jun 2026 | Electricity used for energy storage |
| Exelon Medway LLC | Constellation Power, Inc | Medway, MA | ISO New England (ISNE) | 4.4 GWh | Jun 1970 | Dec 2025 | Distillate Fuel Oil |
| Maynard PV | Terraform Arcadia | Maynard, MA | ISO New England (ISNE) | 1.2 GWh | Dec 2013 | Dec 2025 | Solar |
| DG Crystal Spring CSG | DG Crystal Spring LLC | Mattapoisett, MA | ISO New England (ISNE) | 6.8 GWh | Jun 2017 | Dec 2025 | Solar |
| BWC Origination 18 | BWC Origination 18, LLC | Mattapoisett, MA | ISO New England (ISNE) | 7.4 GWh | Nov 2018 | Dec 2025 | Solar |
| Mashpee Landfill Solar | Nautilus Solar Solutions | Mashpee, MA | ISO New England (ISNE) | 2.0 GWh | Aug 2014 | Dec 2025 | Solar |
| 118 Echo | Madison Energy Investments LLC | Mashpee, MA | ISO New England (ISNE) | 814.0 MWh | Jun 2023 | Dec 2025 | Solar |
| Marston Mills Solar | SoCore Energy LLC | Marstons Mills, MA | ISO New England (ISNE) | 6.3 GWh | Nov 2021 | Dec 2025 | Solar |
| Barnstable Landfill | Clean Focus Yield, LLC | Marstons Mills, MA | ISO New England (ISNE) | 4.9 GWh | Aug 2014 | Dec 2025 | Solar |
| Emerald Marshfields, LLC | Emerald Marshfield, LLC | Marshfield, MA | ISO New England (ISNE) | 2.3 GWh | Nov 2022 | Dec 2025 | Solar |
| Marshfield PV | Terraform Arcadia | Marshfield, MA | ISO New England (ISNE) | 4.6 GWh | Nov 2013 | Dec 2025 | Solar |
| Wilkins Station | Town of Marblehead - (MA) | Marblehead, MA | ISO New England (ISNE) | 32.0 MWh | Oct 1975 | Dec 2025 | Distillate Fuel Oil |
| Kenmare - Mansfield Branch Street | MN8 Energy LLC | Mansfield, MA | ISO New England (ISNE) | 2.3 GWh | May 2017 | Dec 2025 | Solar |
| General Electric Aircraft Engines | General Electric Aircraft Engines | Lynn, MA | ISO New England (ISNE) | 2.4 GWh | Dec 1947 | Jul 2026 | Solar |
| Electric Avenue Lunenburg Solar 1 | Electric Avenue Lunenburg Solar 1, LLC | Lunenburg, MA | ISO New England (ISNE) | 2.5 GWh | Nov 2021 | Dec 2025 | Solar |
| 265 Pleasant Solar NG, LLC | NuGen Capital Management | Lunenburg, MA | ISO New England (ISNE) | 1.3 GWh | Jun 2014 | Dec 2025 | Solar |
| 651 Chase Solar NG | NuGen Capital Management | Lunenburg, MA | ISO New England (ISNE) | 3.9 GWh | May 2014 | Dec 2025 | Solar |
| Settlers Solar | Settlers Solar, LLC | Lunenberg, MA | ISO New England (ISNE) | 7.3 GWh | Nov 2020 | Dec 2025 | Solar |
| Kearsarge Ludlow LLC | Kearsarge Ludlow LLC | Ludlow, MA | ISO New England (ISNE) | 5.6 GWh | Nov 2020 | Dec 2025 | Solar |
| Huxley Solar | Agilitas Energy, Inc. | Ludlow, MA | ISO New England (ISNE) | 10.2 GWh | Nov 2022 | Dec 2025 | Solar |
| Stony Brook | Massachusetts Mun Wholes Electric Co | Ludlow, MA | ISO New England (ISNE) | 123.8 GWh | Oct 1981 | Aug 2026 | Distillate Fuel Oil : 79.0% Natural Gas : 21.0% |
| Ludlow Landfill | CleanCapital Holdings | Ludlow, MA | ISO New England (ISNE) | 3.2 GWh | Jul 2013 | Dec 2025 | Solar |
| Ludlow Site 72 - Conti | NSTAR Electric Company | Ludlow, MA | ISO New England (ISNE) | 2.5 GWh | Jul 2018 | Dec 2025 | Solar |
| Putts Bridge | Central Rivers Power MA, LLC | Ludlow, MA | ISO New England (ISNE) | 10.6 GWh | Dec 1917 | Dec 2025 | Water |
| Boott Hydropower | Boott Hydro, LLC - Hybrid | Lowell, MA | ISO New England (ISNE) | 60.8 GWh | Sep 1985 | Dec 2025 | Water |
| Lowell Solar Landfill | Heliovaas LLC | Lowell, MA | ISO New England (ISNE) | 1.2 GWh | Nov 2013 | Dec 2025 | Solar |
| Nextsun Energy Littleton | Greenbacker Renewable Energy Corporation | Littleton, MA | ISO New England (ISNE) | 5.1 GWh | Sep 2013 | Dec 2025 | Solar |
| Town of Lexington Solar | Syncarpha Lexington, LLC | Lexington, MA | ISO New England (ISNE) | 2.5 GWh | Apr 2017 | Dec 2025 | Solar |
| Leominster | Syncarpha Massachusetts, LLC | Leominster, MA | ISO New England (ISNE) | 2.6 GWh | Apr 2015 | Dec 2025 | Solar |
| AIS Solar Project | Terraform Arcadia | Leominster, MA | ISO New England (ISNE) | 3.4 GWh | Nov 2016 | Dec 2025 | Solar |
| Cherry Valley Solar, LLC CSG | 38 Degrees North, LLC | Leicester, MA | ISO New England (ISNE) | 1.5 GWh | Oct 2017 | Dec 2025 | Solar |
| Leicester One MA Solar LLC | CVI CleanCapital Solar 1 LLC | Leicester, MA | ISO New England (ISNE) | 5.2 GWh | Dec 2014 | Dec 2025 | Solar |
| Syncarpha Leicester Hybrid CSG | Syncarpha Leicester, LLC | Leicester, MA | ISO New England (ISNE) | 4.4 GWh | May 2021 | Dec 2025 | Solar |
| Boutillier Solar, LLC CSG | 38 Degrees North, LLC | Leicester, MA | ISO New England (ISNE) | 4.5 GWh | Mar 2018 | Dec 2025 | Solar |
| Antanavica Solar | SunStrong Management, LLC | Leicester, MA | ISO New England (ISNE) | 1.3 GWh | Jul 2018 | Dec 2025 | Solar |
| Stafford St Solar 3 CSG | Stafford St Solar 3, LLC | Leicester, MA | ISO New England (ISNE) | 1.7 GWh | Nov 2017 | Dec 2025 | Solar |
| Stafford St Solar 1 CSG | Stafford St Solar 1, LLC | Leicester, MA | ISO New England (ISNE) | 3.3 GWh | Nov 2017 | Dec 2025 | Solar |
| Lee Site 31 Solar | NSTAR Electric Company | Lee, MA | ISO New England (ISNE) | 149.0 MWh | Jul 2018 | Dec 2025 | Solar |
| Stafford St 2 Community Solar | Stafford St Solar 2, LLC | Lecister, MA | ISO New England (ISNE) | 3.4 GWh | Apr 2018 | Dec 2025 | Solar |
| Lawrence Hydroelectric Associates | Central Rivers Power US, LLC | Lawrence, MA | ISO New England (ISNE) | 58.9 GWh | Jun 1981 | Dec 2025 | Water |
| Saddleback Solar | SoCore Energy LLC | Lanesborough, MA | ISO New England (ISNE) | 4.5 GWh | Aug 2022 | Dec 2025 | Solar |
| Skyline Solar | SoCore Energy LLC | Lanesborough, MA | ISO New England (ISNE) | 8.2 GWh | Aug 2022 | Dec 2025 | Solar |
| Partridge Solar | SoCore Energy LLC | Lanesborough, MA | ISO New England (ISNE) | 8.1 GWh | Aug 2022 | Dec 2025 | Solar |
| Berkshire Wind Power Project | Massachusetts Mun Wholes Electric Co | Lanesboro, MA | ISO New England (ISNE) | 27.3 GWh | Apr 2011 | Aug 2026 | Wind |
| Brockelman | Integrys MA Solar, LLC | Lancaster, MA | ISO New England (ISNE) | 4.7 GWh | Oct 2013 | Dec 2025 | Solar |
| EDF Lancaster | CleanCapital Holdings | Lancaster, MA | ISO New England (ISNE) | 5.1 GWh | Jun 2014 | Dec 2025 | Solar |
| Amaterasu LLC | AES Distributed Energy | Lancaster, MA | ISO New England (ISNE) | 7.0 GWh | May 2021 | Dec 2025 | Solar |
| Nationwide | Nationwide Solar Energy LLC | Lancaster, MA | ISO New England (ISNE) | 4.7 GWh | May 2021 | Dec 2025 | Solar |
| ZPD-PT Solar Project 2017-038 Hybrid LLC | AES Distributed Energy | Lancaster, MA | ISO New England (ISNE) | 7.5 GWh | Mar 2021 | Dec 2025 | Solar |
| Brockelman Road Solar 2 | Brockelman Road Solar 2, LLC | Lancaster, MA | ISO New England (ISNE) | 1.8 GWh | Jul 2021 | Dec 2025 | Solar |
| Lakeville Solar | C2 MA Lakeville, LLC | Lakeville, MA | ISO New England (ISNE) | 3.0 GWh | Nov 2018 | Dec 2025 | Solar |
| Raboth - Marion Drive | Madison Energy Holdings LLC | Kingston, MA | ISO New England (ISNE) | 3.6 GWh | Feb 2021 | Dec 2025 | Solar |
| High Street Station | Town of Ipswich - (MA) | Ipswich, MA | ISO New England (ISNE) | 153.0 MWh | May 1937 | Dec 2025 | Natural Gas : 92.3% Distillate Fuel Oil : 7.7% |
| Ipswich Wind Turbine | Town of Ipswich - (MA) | Ipswich, MA | ISO New England (ISNE) | 2.1 GWh | Apr 2011 | Dec 2025 | Wind |
| Masspower | Masspower | Indian Orchard, MA | ISO New England (ISNE) | 441.7 GWh | Jun 1993 | Dec 2025 | Natural Gas |
| Indian Orchard | Central Rivers Power MA, LLC | Indian Orchard, MA | ISO New England (ISNE) | 3.5 GWh | Dec 1927 | Dec 2025 | Water |
| Hudson | Captona Hudson LLC | Hudson, MA | ISO New England (ISNE) | 5.4 GWh | Apr 2017 | Dec 2025 | Solar |
| Cherry Street | Town of Hudson - (MA) | Hudson, MA | ISO New England (ISNE) | 320.0 MWh | Apr 1951 | Dec 2025 | Distillate Fuel Oil : 58.5% Natural Gas : 41.5% |
| Williamsville Hybrid CSG | 147 Williamsville Solar 1, LLC | Hubbardston, MA | ISO New England (ISNE) | 7.7 GWh | Aug 2021 | Dec 2025 | Solar |
| KS Solar Six LLC | Kearsarge Solar LLC | Hubbardston, MA | ISO New England (ISNE) | 2.8 GWh | Nov 2013 | Dec 2025 | Solar |
| Hopkinton CSG | Altus Power America Management, LLC | Hopkinton, MA | ISO New England (ISNE) | 2.8 GWh | Mar 2019 | Dec 2025 | Solar |
| BWC Origination 19 | BWC Origination 19 LLC | Hopedale, MA | ISO New England (ISNE) | 1.7 GWh | Jul 2017 | Dec 2025 | Solar |
| Cabot Holyoke | City of Holyoke Gas and Elec Dept - (MA) | Holyoke, MA | ISO New England (ISNE) | 3.0 GWh | Dec 1892 | Dec 2025 | Water |
| Riverside Holyoke | City of Holyoke Gas and Elec Dept - (MA) | Holyoke, MA | ISO New England (ISNE) | 22.5 GWh | Dec 1905 | Dec 2025 | Water |
| Hadley Falls | City of Holyoke Gas and Elec Dept - (MA) | Holyoke, MA | ISO New England (ISNE) | 137.3 GWh | Dec 1951 | Dec 2025 | Water |
| Chemical | City of Holyoke Gas and Elec Dept - (MA) | Holyoke, MA | ISO New England (ISNE) | 5.1 GWh | Dec 1934 | Dec 2025 | Water |
| Boatlock | City of Holyoke Gas and Elec Dept - (MA) | Holyoke, MA | ISO New England (ISNE) | 11.6 GWh | Dec 1920 | Dec 2025 | Water |
| Holyoke Solar Cooperative at Mueller | Holyoke Solar LLC | Holyoke, MA | ISO New England (ISNE) | 3.8 GWh | Nov 2011 | Dec 2025 | Solar |
| Mt. Tom Solar Project Hybrid | Mt. Tom Solar, LLC | Holyoke, MA | ISO New England (ISNE) | 4.2 GWh | Dec 2016 | Dec 2025 | Solar |
| Holliston LLC | Greenbacker Renewable Energy Corporation | Holliston, MA | ISO New England (ISNE) | 1.8 GWh | Sep 2020 | Dec 2025 | Solar |
| Bourne (MA) - Holliston I | NVT LICENSES, LLC | Holliston, MA | ISO New England (ISNE) | 3.5 GWh | Nov 2014 | Dec 2025 | Solar |
| Holliston Solar CSG | MN8 Energy LLC | Holliston, MA | ISO New England (ISNE) | 1.5 GWh | Jun 2015 | Dec 2025 | Solar |
| Hinsdale Solar PV | NSTAR Electric Company | Hinsdale, MA | ISO New England (ISNE) | 2.8 GWh | Dec 2018 | Dec 2025 | Solar |
| Williamsburg Solar LLC VNEM CSG | Tesla Inc. | Haydenville, MA | ISO New England (ISNE) | 1.0 GWh | Jan 2016 | Dec 2025 | Solar |
Browse Power Plants By Massachusetts Counties
Figures are based on August 2026 generation numbers.| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Berkshire County, MA | # 13 | 46 | 85.8 GWh |
| Franklin County, MA | # 12 | 33 | 172.4 GWh |
| Hampshire County, MA | # 11 | 39 | 226.3 GWh |
| Suffolk County, MA | # 10 | 14 | 427.6 GWh |
| Barnstable County, MA | # 9 | 25 | 531.6 GWh |
| Bristol County, MA | # 8 | 75 | 645.7 GWh |
| Plymouth County, MA | # 7 | 86 | 797.7 GWh |
| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Dukes County, MA | # 6 | 7 | 879.6 GWh |
| Hampden County, MA | # 5 | 90 | 1.9 TWh |
| Middlesex County, MA | # 4 | 70 | 1.9 TWh |
| Essex County, MA | # 3 | 41 | 2.1 TWh |
| Worcester County, MA | # 2 | 200 | 4.9 TWh |
| Norfolk County, MA | # 1 | 40 | 5.9 TWh |