ISO New England
Balancing Authority Summary Information
ISO New England is ranked #15 out of 64 balancing authorities in terms of total annual electricity generation.
| Balancing Authority | ISO New England |
|---|---|
| States | Connecticut Maine Massachusetts New Hampshire New York Rhode Island Vermont |
| Last Update | Jul 2026 |
| Annual Generation | 111.1 TWh |
| Power Plants | 1,629 |
| Utilities | 833 |
| Ranked #15 out of 64 in terms of net annual generation | |
| Ranked #10 out of 53 in terms of annual generation from natural gas | |
| Power Plant Types | Natural Gas | 54.9% Nuclear | 25% Wind | 5.1% Water | 4.5% Other Fuel | 4.4% Solar | 1.6% Coal | 0.1% |
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Daily Net Generation for ISO New England for the past 3 Years
| Plant Name | Utility | Location | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|
| Barrett PV | MN8 Energy LLC | Oxford, MA | 17 GWh | Oct 2016 | Dec 2025 | Solar |
| Barrett Farm Solar - Phase I | Onyx Asset Services Group | Thompson, CT | 3 GWh | Sep 2017 | Dec 2024 | Solar |
| Barre Solar III LLC | AES Distributed Energy | Barre, MA | 1 GWh | Feb 2018 | Dec 2025 | Solar |
| Barre II Solar Project | Kearsarge Solar LLC | Barre, MA | 2 GWh | Mar 2014 | Dec 2025 | Solar |
| Barnstable Landfill | Clean Focus Yield, LLC | Marstons Mills, MA | 5 GWh | Aug 2014 | Dec 2025 | Solar |
| Barker Lower | KEI (Maine) Power Management (III) LLC | Auburn, ME | 4 GWh | Mar 1986 | Dec 2025 | Water |
| Barefoot Solar | Madison Energy Investments LLC | Fairfield, ME | 6 GWh | Nov 2022 | Dec 2025 | Solar |
| Ball Mountain Hydro | Eagle Creek Renewable Energy, LLC | Jamaica, VT | 995 MWh | Mar 2016 | Dec 2025 | Water |
| Baldwin (ME) | Maine DG Solar Baldwin, LLC | West Baldwin, ME | 10 GWh | Feb 2022 | Dec 2025 | Solar |
| Backus Microgrid Project | Connecticut Mun Elec Engy Coop | Norwich, CT | 843 MWh | Jul 2014 | May 2026 | Distillate Fuel Oil |
| Aziscohos Hydroelectric Project | Brookfield White Pine Hydro LLC | Wilson Mills, ME | 30 GWh | May 1988 | Dec 2025 | Water |
| Ayers Village Solar | Altus Power America Management, LLC | Methuen, MA | 3 GWh | May 2014 | Dec 2025 | Solar |
| Ayers Island | Central Rivers Power NH, LLC | Bristol, NH | 36 GWh | Jul 1925 | Dec 2025 | Water |
| Axio Green LLC | Altus Power America Management, LLC | Greenfield Township, MA | 2 GWh | May 2012 | Dec 2025 | Solar |
| Ava Solar | Ecos Energy LLC | Ware, MA | 2 GWh | Nov 2023 | Dec 2025 | Solar |
| Augusta Road Bowdoin Solar, LLC | REA Investments, LLC | Bowdoin, ME | 5 GWh | Jan 2022 | Dec 2025 | Solar |
| Augusta PV - BD Solar Augusta LLC | BD Solar Augusta LLC | Augusta, ME | 9 GWh | May 2021 | Dec 2025 | Solar |
| Augusta | Maine DG Solar Augusta, LLC | Augusta, ME | 5 GWh | Feb 2022 | Dec 2025 | Solar |
| Auburn Solar Project | Agilitas Energy, Inc. | Auburn, MA | 8 GWh | Apr 2022 | Dec 2025 | Solar |
| Athens Ridge | Greenbacker Renewable Energy Corporation | Athens, ME | 5 GWh | Feb 2024 | Dec 2025 | Solar |
| Athens Energy | Athens Energy, LLC | Athens, ME | 56 GWh | Sep 2016 | Dec 2025 | Wood/Wood Waste Solids |
| Athens AT01 | Nautilus Solar Solutions | Athens, ME | 7 GWh | May 2022 | Dec 2025 | Solar |
| Ashland Solar | Citizens Enterprises Corporation | Ashland, MA | 6 GWh | Nov 2019 | Dec 2025 | Solar |
| Ashby Solar, LLC CSG | Ashby Solar, LLC | Fitchburg, MA | 3 GWh | Jun 2018 | Dec 2025 | Solar |
| Ashby Duffy CSG Solar Farm | LSE Cassiopeia LLC | Ashby, MA | 3 GWh | Nov 2017 | Dec 2025 | Solar |
| ASD Wallum MA Solar LLC(CSG) | ASD Wallum MA Solar LLC | Douglas, MA | 9 GWh | Dec 2021 | Dec 2024 | Solar |
| ASD Cotuit MA Solar LLC | ASD Cotuit MA Solar LLC | Sandwich, MA | 2 GWh | Oct 2023 | Dec 2024 | Solar |
| Ascutney | Green Mountain Power Corp | Weatherfield, VT | 437 MWh | Jul 1961 | May 2026 | Distillate Fuel Oil |
| Arctaris Saddleback Solar | Arctaris Saddleback Solar, LLC | Dallas Plantation, ME | 7 GWh | Oct 2023 | Dec 2025 | Solar |
| Apollo | Sunrise on Wing Ln. LLC | Acushnet, MA | 2 GWh | Aug 2021 | Dec 2024 | Solar |
| Antrim Wind | Antrim Wind Energy LLC | Antrim, NH | 76 GWh | Nov 2019 | May 2026 | Wind |
| Antares-GRE 314 East Lyme LLC | MN8 Energy LLC | East Lyme, CT | 4 GWh | May 2014 | May 2026 | Solar |
| Antanavica Solar | SunStrong Management, LLC | Leicester, MA | 1 GWh | Jul 2018 | Dec 2024 | Solar |
| Anson Abenaki Hydros | Eagle Creek Renewable Energy, LLC | Madison, ME | 101 GWh | Dec 1949 | Dec 2025 | Water |
| ANP Blackstone Energy Project | ANP Blackstone Energy Company LLC | Blackstone, MA | 3 TWh | May 2001 | May 2026 | Natural Gas |
| ANP Bellingham Energy Project | Bellingham Power Generation LLC | Bellingham, MA | 3 TWh | Oct 2002 | May 2026 | Natural Gas |
| Annese Solar Project Hybrid CSG | AES Distributed Energy | Southbridge, MA | 8 GWh | Nov 2020 | Dec 2025 | Solar : 99.1% Electricity used for energy storage : 0.9% |
| Amoskeag | Central Rivers Power NH, LLC | Manchester, NH | 65 GWh | Jul 1922 | Dec 2025 | Water |
| Amherst College Co Gen | Amherst College | Amherst, MA | 8 GWh | Oct 2006 | Dec 2025 | Natural Gas |
| Ameresco Chicopee Energy | AMERESCO Chicopee Energy LLC | Chicopee, MA | 4 GWh | Jan 2004 | Dec 2025 | Landfill Gas |
| Amazon BDL4 | Telyon AMZ Windsor LLC | Windsor, CT | 4 GWh | Dec 2024 | Dec 2025 | Solar |
| Amazon BDL3 Solar Project | Solar Star Prime 1 LLC | New Haven, CT | 2 GWh | Sep 2019 | Dec 2025 | Solar |
| Amaterasu LLC | AES Distributed Energy | Lancaster, MA | 7 GWh | May 2021 | Dec 2025 | Solar |
| Alton Road Solar | Revity Energy LLC | Bradford, RI | 24 GWh | Nov 2019 | Dec 2025 | Solar |
| Alicea Solar Project Hybrid CSG | AES Distributed Energy | Southbridge, MA | 4 GWh | Nov 2020 | Dec 2025 | Solar |
| Algonquin Windsor Locks | Ahlstrom Power Windsor Locks LLC | Windsor Locks, CT | 147 GWh | Dec 1989 | May 2026 | Natural Gas : 92.2% Distillate Fuel Oil : 7.8% |
| Alexander Road Solar | RPNY Solar 7, LLC | Batavia, NY | 3 GWh | Jun 2024 | Dec 2025 | Solar |
| ALDI DC 2 | Powerflex | South Windsor, CT | 1 GWh | Jan 2018 | Dec 2025 | Solar |
| Ajax Solar, LLC (MA) | Green Street Power Partners | West Bridgewater, MA | 4 GWh | Nov 2017 | Dec 2025 | Solar |
| AIS Solar Project | Terraform Arcadia | Leominster, MA | 3 GWh | Nov 2016 | Dec 2025 | Solar |
| Agawam Solar | Citizens Enterprises Corporation | Agawam, MA | 2 GWh | Feb 2012 | Dec 2025 | Solar |
| Aegean Drive Solar | Aegean Drive Solar LLC | Methuen, MA | 2 GWh | Aug 2021 | Dec 2025 | Solar |
| Advance Stores Company, Inc | Tesla Inc. | Enfield, CT | 1 GWh | Oct 2014 | Mar 2025 | Solar |
| Adirondack A+B Community Solar Garden | BWC Connecticut River LLC | Westport, MA | 8 GWh | Nov 2018 | Dec 2024 | Solar |
| Adams Solar | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Adams Grove Solar | SoCore Energy LLC | Adams, MA | 6 GWh | Aug 2022 | Dec 2024 | Solar |
| Adams Farm Solar | Altus Power America Management, LLC | Athol, MA | 4 GWh | Sep 2013 | Dec 2025 | Solar |
| Acushnet MA 2 (CSG) | Navisun LLC | Acushnet, MA | 1 GWh | Feb 2024 | Dec 2025 | Solar |
| Acushnet MA 1 | Navisun LLC | Acushnet, MA | 1 GWh | Nov 2023 | Dec 2025 | Solar |
| Acushnet- High Hill | CleanCapital Holdings | Dartmouth, MA | 3 GWh | Feb 2013 | Dec 2025 | Solar |
| Acushnet Hawes Reed Road | CleanCapital Holdings | Dartmouth, MA | 2 GWh | Jun 2012 | Dec 2025 | Solar |
| Acushnet-Braley Road 1 | CleanCapital Holdings | Freetown, MA | 3 GWh | Dec 2012 | Dec 2025 | Solar |
| Acushnet AD Makepeace | CleanCapital Holdings | Wareham, MA | 6 GWh | Jun 2012 | Dec 2025 | Solar |
| Acton Solar Landfill | Heliovaas LLC | Acton, MA | 475 MWh | Nov 2013 | Dec 2025 | Solar |
| Acton | Acton H Road Solar 1, LLC | Acton, ME | 5 GWh | Nov 2021 | Dec 2025 | Solar |
| A Street 2 | Captona A Street 2 Johnston LLC | Johnston, RI | 3 GWh | Nov 2018 | Dec 2025 | Solar |
| A Street 1 | Captona A Street 1 Johnston LLC | Johnston, RI | 2 GWh | Nov 2018 | Dec 2025 | Solar |
Surrounding Balancing Authorities
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #61 | Alcoa Power Generating, Inc. - Yadkin Division | 442.5 GWh | 4 |
| #24 | Dominion Energy South Carolina, Inc. | 25.3 TWh | 83 |
| #13 | Duke Energy Carolinas | 112.6 TWh | 577 |
| #17 | Duke Energy Progress East | 64.5 TWh | 565 |
| #50 | Duke Energy Progress West | 4.5 TWh | 15 |
| #23 | Louisville Gas and Electric Company and Kentucky Utilities Company | 33.9 TWh | 25 |
| #12 | New York Independent System Operator | 134.3 TWh | 1,299 |
| #1 | PJM Interconnection, LLC | 882.8 TWh | 2,652 |
| #31 | South Carolina Public Service Authority | 18.5 TWh | 35 |
| #59 | Southeastern Power Administration | 1.3 TWh | 11 |
Balancing Authorities with Similar Net Generation
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #7 | California Independent System Operator | 169.4 TWh | 2,135 |
| #9 | Tennessee Valley Authority | 163.4 TWh | 207 |
| #10 | Florida Power & Light Co. | 152.2 TWh | 187 |
| #12 | New York Independent System Operator | 134.3 TWh | 1,299 |
| #13 | Duke Energy Carolinas | 112.6 TWh | 577 |
| #15 | ISO New England | 111.1 TWh | 1,629 |
| #16 | Bonneville Power Administration | 91.6 TWh | 167 |
| #17 | Duke Energy Progress East | 64.5 TWh | 565 |
| #18 | PacifiCorp East | 60.9 TWh | 222 |
| #19 | Salt River Project Agricultural Improvement and Power District | 60.3 TWh | 49 |