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 |
|---|---|---|---|---|---|---|
| Williams Hydro | Brookfield White Pine Hydro LLC | Solon, ME | 64 GWh | Dec 1938 | Dec 2025 | Water |
| Williams Rd | AES Distributed Energy | Ransomville, NY | 6 GWh | Aug 2021 | Dec 2025 | Solar |
| Williamsburg | AES Distributed Energy | Goshen, MA | 6 GWh | Jun 2019 | Dec 2025 | Solar |
| Williamsburg Solar LLC VNEM CSG | Tesla Inc. | Haydenville, MA | 1 GWh | Jan 2016 | Dec 2025 | Solar |
| Williamstown Solar | CVI CleanCapital Solar 1 LLC | Williamstown, VT | 2 GWh | Nov 2012 | Dec 2025 | Solar |
| Williamsville Hybrid CSG | 147 Williamsville Solar 1, LLC | Hubbardston, MA | 9 GWh | Aug 2021 | Dec 2024 | Solar |
| Wilmarth Solar | Wilmarth Lane Solar 1, LLC | Plainville, MA | 8 GWh | Jan 2020 | Dec 2024 | Solar |
| Wilmington Solar | MN8 Energy LLC | Wilmington, MA | 2 GWh | Oct 2015 | Dec 2025 | Solar |
| Wilson Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Wilson Solar (MA) | RWE Clean Energy | Spencer, MA | 870 MWh | May 2013 | Dec 2025 | Solar |
| Winchendon Landfill Solar | Onyx Asset Services Group | Winchendon, MA | 3 GWh | Sep 2018 | Dec 2024 | Solar |
| Winchendon Solar | Altus Power America Management, LLC | Winchendon, MA | 3 GWh | Mar 2014 | Dec 2025 | Solar |
| Wind Colebrook South | Wind Colebrook South | Colebrook, CT | 11 GWh | Oct 2015 | May 2026 | Wind |
| Winslow PV - BD Solar 2 LLC | BD Solar 2 LLC | Winslow, ME | 10 GWh | Jun 2022 | Dec 2025 | Solar |
| Woburn | Greenbacker Renewable Energy Corporation | Woburn, MA | 2 GWh | Nov 2020 | Dec 2025 | Solar |
| Woodchuck Solar, LLC CSG | 38 Degrees North, LLC | Spencer, MA | 2 GWh | Nov 2017 | Dec 2025 | Solar |
| Woodland Avenue Solar 1 | Woodland Avenue Solar 1, LLC | Seekonk, MA | 9 GWh | Jul 2020 | Dec 2025 | Solar |
| Woods Hill Solar | Woods Hill Solar, LLC | Pomfret, CT | 22 GWh | Nov 2018 | May 2026 | Solar |
| Worcester Landfill | City of Worcester DPW - (MA) | Worcester, MA | 8 GWh | Apr 2017 | Dec 2025 | Solar |
| Worumbo Hydro Station | Eagle Creek Renewable Energy, LLC | Lisbon Falls, ME | 74 GWh | Jan 1989 | Dec 2025 | Water |
| Wrightsville Hydro Plant | Washington Electric Coop - (VT) | Montpelier, VT | 374 MWh | Aug 1985 | Dec 2025 | Water |
| WYM 1250 Palmer LLC | CVI CleanCapital Solar 6 | Palmer, MA | 1 GWh | Aug 2013 | Dec 2025 | Solar |
| Wyman Hydro | Brookfield White Pine Hydro LLC | Bingham, ME | 295 GWh | Dec 1929 | Dec 2025 | Water |
| Yale New Haven - New London | Bloom Energy | New London, CT | 14 GWh | Aug 2022 | Dec 2025 | Natural Gas |
| ZPD-PT Solar Project 2017-006 LLC Hybrid | AES Distributed Energy | Warren, MA | 6 GWh | Jun 2021 | Dec 2025 | Solar |
| ZPD-PT Solar Project 2017-021 LLC Hybrid | AES Distributed Energy | Wilbraham, MA | 2 GWh | Dec 2020 | Dec 2025 | Solar |
| ZPD-PT Solar Project 2017-023 LLC Hybrid | AES Distributed Energy | Southbridge, MA | 4 GWh | Dec 2020 | Dec 2025 | Solar : 99.9% |
| ZPD-PT Solar Project 2017-038 Hybrid LLC | AES Distributed Energy | Lancaster, MA | 8 GWh | Mar 2021 | Dec 2025 | Solar |
| ZPD-PT Solar Project 2017-044 LLC CSG | AES Distributed Energy | Spencer, MA | 812 MWh | Sep 2021 | Dec 2025 | Solar |
| 0 Hammond St CSG | 0HAM WHAM8 Solar, LLC | Carver, MA | 14 GWh | Sep 2021 | Dec 2024 | Solar |
| 0 Middle | Madison Energy Investments LLC | Chatham, MA | 3 GWh | Aug 2022 | Dec 2025 | Solar |
| 1 Commercial | Madison Energy Investments LLC | Sharon, MA | 622 MWh | Aug 2023 | Oct 2025 | Solar |
| 10 Briggs Solar NG, LLC (East) | NuGen Capital Management | East Greenwich, RI | 8 GWh | May 2021 | Dec 2025 | Solar |
| 115 G Fisher | Greenbacker Renewable Energy Corporation | Middleborough, MA | 2 GWh | Sep 2015 | Dec 2025 | Solar |
| 118 Echo | Madison Energy Investments LLC | Mashpee, MA | 814 MWh | Jun 2023 | Dec 2025 | Solar |
| 126 Grove Solar LLC | Altus Power America Management, LLC | Franklin, MA | 2 GWh | May 2012 | Dec 2025 | Solar |
| 15 Glen Harris RD | ME Sandy River LLC | New Sharon, ME | 5 GWh | May 2024 | Dec 2025 | Solar |
| 15 Lincoln | Madison Energy Investments LLC | Norfolk, MA | 1 GWh | Nov 2022 | Dec 2025 | Solar |
| 1519 Crandall Road | 1519 Crandall Road LLC | Tiverton, RI | 6 GWh | Nov 2020 | Dec 2025 | Solar |
| 154 D Fisher | Greenbacker Renewable Energy Corporation | Middleborough, MA | 2 GWh | Nov 2015 | Dec 2025 | Solar |
| 158th Fighter Wing Solar Farm | 158th Fighter Wing | South Burlington, VT | 1 GWh | Aug 2011 | Dec 2025 | Solar |
| 160 Tihonet Rd Hybrid(CSG) | 160TIH WHAM8 Solar, LLC | Wareham, MA | 10 GWh | Nov 2021 | Dec 2024 | Solar |
| 1639 RT 29 Solar 1 | 1639 RT 29 Solar 1, LLC | Gloversville, NY | 7 GWh | Nov 2020 | Dec 2025 | Solar |
| 1639 RT 29 Solar 2 | 1639 RT 29 Solar 2, LLC | Gloversville, NY | 4 GWh | Nov 2020 | Dec 2025 | Solar |
| 196 Tremont St(CSG) | 196TRE WHAM8 Solar, LLC | Carver, MA | 4 GWh | Oct 2021 | Dec 2024 | Solar |
| 20 Bedford | Madison Energy Investments LLC | Bridgewater, MA | 146 MWh | Nov 2024 | Dec 2025 | Solar |
| 201 Sturbridge B | Altus Power America Management, LLC | Brimfield, MA | 2 GWh | May 2014 | Dec 2025 | Solar |
| 205 Sturbridge A | Altus Power America Management, LLC | Brimfield, MA | 4 GWh | May 2014 | Dec 2025 | Solar |
| 265 Pleasant Solar NG, LLC | NuGen Capital Management | Lunenburg, MA | 1 GWh | Jun 2014 | Dec 2025 | Solar |
| 276 Federal Rd(CSG) | 276FED WHAM8 Solar, LLC | Carver, MA | 10 GWh | Oct 2021 | Dec 2024 | Solar |
| 28 Livermore Hill Road Solar | 28 Livermore Hill Road Solar, LLC | Westminster, MA | 7 GWh | May 2020 | Dec 2025 | Solar |
| 299 Farm to Market Rd Hybrid(CSG) | 299F2M WHAM8 Solar, LLC | Wareham, MA | 6 GWh | Nov 2021 | Dec 2024 | Solar |
| 301 Chestnut Solar NG | NuGen Capital Management | East Longmeadow, MA | 2 GWh | Mar 2017 | Dec 2025 | Solar |
| 3104 Batavia Solar | 3104 Batavia Solar, LLC | Batavia, NY | 5 GWh | Feb 2021 | Dec 2025 | Solar |
| 3232 Batavia Solar | 3232 Batavia Solar, LLC | Batavia, NY | 7 GWh | Feb 2021 | Dec 2025 | Solar |
| 376 Nash | Madison Energy Investments LLC | New Bedford, MA | 17 MWh | Nov 2024 | Dec 2025 | Solar |
| 3Colton | Madison Energy Holdings LLC | Millbury, MA | 5 GWh | Jun 2023 | Dec 2025 | Solar |
| 433 Purchase Solar NG, LLC | NuGen Capital Management | Swansea, MA | 4 GWh | Mar 2012 | Dec 2025 | Solar |
| 5 Berry | Madison Energy Investments LLC | Plainsville, MA | 8 GWh | Aug 2023 | Dec 2025 | Solar |
| 515 Main Saugus | 515 Main Saugus LLC | Saugus, MA | 2 GWh | Aug 2017 | Dec 2025 | Solar |
| 580 River Solar | NuGen Capital Management | Winchendon, MA | 4 GWh | Aug 2018 | Dec 2025 | Solar |
| 59 Federal Rd(CSG) | 59FED WHAM8 Solar, LLC | Carver, MA | 11 GWh | Oct 2021 | Dec 2024 | Solar |
| 651 Chase Solar NG | NuGen Capital Management | Lunenburg, MA | 4 GWh | May 2014 | Dec 2025 | Solar |
| 665 Scenic Highway | Madison Energy Investments LLC | Bourne, MA | 89 MWh | Nov 2022 | Dec 2025 | Solar |
| 700 Binnewater | Madison Energy Investments LLC | Rosendale, NY | 2 GWh | Aug 2022 | Dec 2025 | Solar |
| 71 Charlotte Furnace Rd Hybrid(CSG) | 71CFR WHAM8 Solar, LLC | Wareham, MA | 2 GWh | Nov 2021 | Dec 2024 | Solar |
| 77 Farm to Market Rd Hybrid(CSG) | 77F2M WHAM8 Solar, LLC | Wareham, MA | 9 GWh | Nov 2021 | Dec 2024 | 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 |