ISO New England
Balancing Authority Summary Information
ISO New England is ranked #15 out of 65 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 | Nov 2025 |
| Annual Generation | 105.5 TWh |
| Power Plants | 1,577 |
| Utilities | 819 |
| Ranked #15 out of 65 in terms of net annual generation | |
| Ranked #12 out of 53 in terms of annual generation from natural gas | |
| Power Plant Types | Natural Gas | 55.8% Nuclear | 26% Water | 5% Other Fuel | 4.4% Wind | 4% Solar | 1.5% Coal | 0.4% |
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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 |
|---|---|---|---|---|---|---|
| WED Shun II, LLC | WED Shun II, LLC | Johnston, RI | 6 GWh | Dec 2018 | Dec 2024 | Wind |
| WED Plainfield, LLC | WED Plainfield, LLC | Johnston, RI | 6 GWh | Dec 2018 | Dec 2024 | Wind |
| WED Plainfield III, LLC | WED Plainfield III, LLC | Johnston, RI | 6 GWh | Dec 2018 | Dec 2024 | Wind |
| WED Plainfield II, LLC | WED Plainfield II, LLC | Johnston, RI | 6 GWh | Dec 2018 | Dec 2024 | Wind |
| Ludlow Site 72 - Conti | NSTAR Electric Company | Ludlow, MA | 2 GWh | Jul 2018 | Dec 2024 | Solar |
| East Springfield Solar PV | NSTAR Electric Company | Springfield, MA | 2 GWh | Sep 2018 | Dec 2024 | Solar |
| Hatfield Solar PV | NSTAR Electric Company | Hatfield, MA | 6 GWh | Nov 2018 | Dec 2024 | Solar |
| Sunderland Solar PV | NSTAR Electric Company | Sunderland, MA | 2 GWh | Aug 2018 | Dec 2024 | Solar |
| Town of Branford | Tesla Inc. | Branford, CT | 2 GWh | May 2018 | Dec 2024 | Solar |
| Hampden Solar PV | NSTAR Electric Company | Hampden, MA | 6 GWh | Oct 2019 | Dec 2024 | Solar |
| Springfield Solar PV | NSTAR Electric Company | Springfield, MA | 6 GWh | Dec 2018 | Dec 2024 | Solar |
| Southampton Solar PV | NSTAR Electric Company | Southampton, MA | 3 GWh | Jan 2019 | Dec 2024 | Solar |
| Savoy Solar PV | NSTAR Electric Company | Savoy, MA | 3 GWh | Jan 2019 | Dec 2024 | Solar |
| Hinsdale Solar PV | NSTAR Electric Company | Hinsdale, MA | 3 GWh | Dec 2018 | Dec 2024 | Solar |
| Greenfield Solar PV | NSTAR Electric Company | Greenfield, MA | 3 GWh | Dec 2018 | Dec 2024 | Solar |
| East Longmeadow Solar PV | NSTAR Electric Company | East Longmeadow, MA | 5 GWh | Sep 2019 | Dec 2024 | Solar |
| Wareham Solar PV | NSTAR Electric Company | Wareham, MA | 1 GWh | Nov 2018 | Dec 2024 | Solar |
| Adams Solar | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2024 | Solar |
| Hamilton Solar | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2024 | Solar |
| Jefferson Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Dec 2017 | Dec 2024 | Solar |
| Wilson Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2024 | Solar |
| Franklin Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2024 | Solar |
| Saint Albans Solar | Cypress Creek Renewables | Georgia, VT | 8 GWh | Sep 2018 | Dec 2024 | Solar |
| Toray Plastic America's CHP Plant | Toray Plastics America | North Kingstown, RI | 147 GWh | Dec 2002 | Dec 2024 | Natural Gas |
| Hope Farm Solar, LLC | Adapture Renewables, Inc. | Cranston, RI | 16 GWh | Aug 2019 | Dec 2024 | Solar |
| IKEA New Haven Rooftop PV & Fuel Cell | IKEA Property Inc | New Haven, CT | 3 GWh | Jun 2012 | Dec 2024 | Natural Gas : 73.1% Solar : 26.9% |
| Kearsarge Granby | Kearsarge Granby LLC | Granby, MA | 4 GWh | Feb 2017 | Dec 2024 | Solar |
| Kearsarge Concord II | Kearsarge Concord II LLC | Concord, MA | 7 GWh | Dec 2016 | Dec 2024 | Solar |
| Trinity College Fuel Cell | AEP Onsite Partners, LLC | Hartford, CT | 12 GWh | Jul 2018 | Dec 2024 | Natural Gas |
| Syncarpha Still River, LLC CSG | Syncarpha Still River, LLC | Bolton, MA | 4 GWh | Nov 2016 | Dec 2024 | Solar |
| Syncarpha Hancock III CSG | Syncarpha Hancock III, LLC | Pittsfield, MA | 2 GWh | Oct 2017 | Dec 2024 | Solar |
| Syncarpha Hancock II CSG | Syncarpha Hancock II, LLC | Hancock, MA | 3 GWh | Oct 2017 | Dec 2024 | Solar |
| Syncarpha Hancock I CSG | Syncarpha Hancock I, LLC | Hancock, MA | 3 GWh | Oct 2017 | Dec 2024 | Solar |
| East Acres Solar NG, LLC | NuGen Capital Management | Pittsfield, MA | 5 GWh | Mar 2017 | Dec 2024 | Solar |
| Naval Sub Base New London Fuel Cell | Groton Station Fuel Cell, LLC | Groton, CT | 44 GWh | Nov 2022 | Dec 2024 | Natural Gas |
| Randolph | Altus Power America Management, LLC | Randolph, MA | 6 GWh | Oct 2017 | Dec 2024 | Solar |
| Solten Plainville 6000, LLC | Altus Power America Management, LLC | Plainville, MA | 7 GWh | Jul 2017 | Dec 2024 | Solar |
| MA Solar Storage 1 Hybrid | Origis Energy USA, Inc | Sterling, MA | 1 GWh | Feb 2018 | Dec 2024 | Solar |
| Barrett Farm Solar - Phase I | Onyx Asset Services Group | Thompson, CT | 3 GWh | Sep 2017 | Dec 2024 | Solar |
| Onyx - Brockton Thatcher Landfill Solar | Onyx Asset Services Group | Brockton, MA | 5 GWh | Oct 2017 | Dec 2024 | Solar |
| Onyx - Pembroke Landfill Solar | Onyx Asset Services Group | Pembroke, MA | 3 GWh | Nov 2017 | Dec 2024 | Solar |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | 53 GWh | May 2010 | Dec 2024 | Natural Gas : 99.8% |
| Greater New Bedford LFG Utiliz. Facility | CommonWealth New Bedford Energy LLC | New Bedford, MA | 17 GWh | Sep 2005 | Dec 2024 | Landfill Gas |
| Texon Hydroelectric Project | Hitchcock Hydro, LLC | Russell, MA | 4 GWh | Dec 1981 | Dec 2024 | Water |
| DG Webster LLC CSG | DG Webster, LLC | Webster, MA | 2 GWh | Nov 2017 | Dec 2024 | Solar |
| DG Tufts Knoll LLC CSG | DG Tufts Knoll, LLC | North Grafton, MA | 3 GWh | Jul 2017 | Dec 2024 | Solar |
| DG Dighton LLC CSG | DG Dighton, LLC | Dighton, MA | 5 GWh | Jun 2017 | Dec 2024 | Solar |
| DG Tufts Science LLC CSG | DG Tufts Science, LLC | North Grafton, MA | 1 GWh | Jan 2017 | Dec 2024 | Solar |
| West Brookfield Solar - Gilbertsville Rd | Nautilus Solar Solutions | West Brookfield, MA | 6 GWh | May 2017 | Dec 2024 | Solar |
| Brookfield Solar 2013 LLC | CVI CleanCapital Solar 6 | North Brookfield, MA | 2 GWh | Nov 2013 | Dec 2024 | Solar |
| Stafford MS Ground Mount Community Solar | Town of Stafford - (CT) | Stafford, CT | 3 GWh | Jun 2016 | Dec 2024 | Solar |
| Nexamp Peak CSG | Nexamp Peak, LLC | Hancock, MA | 2 GWh | Nov 2015 | Dec 2024 | Solar |
| Sutton Solar CSG | Sutton Solar, LLC | Sutton, MA | 3 GWh | Oct 2016 | Dec 2024 | Solar |
| Kearsarge Southwick LLC | Kearsarge Solar LLC | Southwick, MA | 4 GWh | Feb 2015 | Dec 2024 | Solar |
| Bashaw Solar CSG 1, LLC | Bashaw Solar 1, LLC | Newbury, MA | 3 GWh | Mar 2017 | Dec 2024 | Solar |
| VEC Alburgh Array | SoCore Energy LLC | Alburgh, VT | 1 GWh | Nov 2016 | Dec 2024 | Solar |
| 126 Grove Solar LLC | Altus Power America Management, LLC | Franklin, MA | 2 GWh | May 2012 | Dec 2024 | Solar |
| Iron Horse Solar I CSG | Iron Horse Solar 1, LLC | North Billerica, MA | 4 GWh | Nov 2016 | Dec 2024 | Solar |
| Bird Machine Solar Farm | Bird Machine Solar Farm, LLC | South Walpole, MA | 6 GWh | Jul 2017 | Dec 2024 | Solar |
| Depot Hill Solar CSG | CCC Solar Holdings LLC | Charlton, MA | 3 GWh | Sep 2016 | Dec 2024 | Solar |
| Curtis Hill Solar CSG | CCC Solar Holdings LLC | Charlton, MA | 3 GWh | Sep 2016 | Dec 2024 | Solar |
| Orbit Energy RI | Anaergia | Johnston, RI | 144 MWh | Jun 2017 | Dec 2024 | Other Biomass Gas |
| Town of Lexington Solar | Syncarpha Lexington, LLC | Lexington, MA | 3 GWh | Apr 2017 | Dec 2024 | Solar |
| Hampshire College Hybrid | Tesla Inc. | Amherst, MA | 5 GWh | Apr 2017 | Dec 2024 | Solar |
| Iron Horse Solar 4, LLC | Iron Horse Solar 4, LLC | North Billerica, MA | 7 GWh | May 2017 | Dec 2024 | Solar |
| Deerfield CSG Solar | MN8 Energy LLC | Deerfield, MA | 6 GWh | Nov 2017 | Dec 2024 | Solar |
| Cedarville CSG | Altus Power America Management, LLC | Plymouth, MA | 4 GWh | Jun 2017 | Dec 2024 | Solar |
| Meadow Solar | Altus Power America Management, LLC | Boston, MA | 4 GWh | Nov 2016 | Dec 2024 | Solar |
| DDR Shoppers World | Altus Power America Management, LLC | Framingham, MA | 2 GWh | Oct 2017 | Dec 2024 | Solar |
| Shirley Landfill | Altus Power America Management, LLC | Shirley, MA | 1 GWh | Apr 2017 | Dec 2024 | Solar |
| Fall River Solar CSG | MN8 Energy LLC | Fall River, MA | 2 GWh | Jan 2013 | Dec 2024 | Solar |
| Wilmington Solar | MN8 Energy LLC | Wilmington, MA | 3 GWh | Oct 2015 | Dec 2024 | Solar |
| Holliston Solar CSG | MN8 Energy LLC | Holliston, MA | 1 GWh | Jun 2015 | Dec 2024 | Solar |
| Bridgewater Solar CSG | MN8 Energy LLC | Bridgewater, MA | 4 GWh | Jul 2015 | Dec 2024 | Solar |
| Stone Hill Solar CSG | MN8 Energy LLC | North Easton, MA | 3 GWh | Jun 2014 | Dec 2024 | Solar |
| Belchertown | Altus Power America Management, LLC | Belchertown, MA | 1 GWh | Nov 2015 | Dec 2024 | Solar |
| West Brookfield Solar, LLC | CVI CleanCapital Solar 7 | West Brookfield, MA | 2 GWh | Dec 2015 | Dec 2024 | Solar |
| Solar Mule, LLC | Solar Mule, LLC | Oakland, ME | 2 GWh | Aug 2017 | Dec 2024 | Solar |
| Renew Canal 1 CSG LLC | NRG Renew Canal 1 LLC | Sandwich, MA | 2 GWh | May 2017 | Dec 2024 | Solar |
| Worcester Landfill | City of Worcester DPW | Worcester, MA | 8 GWh | Apr 2017 | Dec 2024 | Solar |
| Southern Sky Renew Energy Berkley LLC | Southern Sky Renewable Energy Berkley, LLC | Berkley, MA | 3 GWh | May 2014 | Dec 2024 | Solar |
| WYM 1250 Palmer LLC | CVI CleanCapital Solar 6 | Palmer, MA | 1 GWh | Aug 2013 | Dec 2024 | Solar |
| Onondaga County- Clearwater | Tesla Inc. | Oswego, NY | 3 GWh | Jun 2017 | Dec 2024 | Solar |
| CMEEC - Bozrah | Tesla Inc. | Bozrah, CT | 3 GWh | Nov 2016 | Dec 2024 | Solar |
| Conn Mun Electric Energy Coop | Tesla Inc. | Norwich, CT | 1 GWh | Nov 2016 | Dec 2024 | Solar |
| Orange County Solar Farm (NY) | Tesla Inc. | Goshen, NY | 2 GWh | Apr 2017 | Dec 2024 | Solar |
| CED Westfield Solar, LLC | Consolidated Edison Development Inc. | Westfield, MA | 3 GWh | Jul 2016 | Dec 2024 | Solar |
| West Groton CHP | Hollingsworth & Vose Co West Groton | Groton, MA | 22 GWh | Nov 2015 | Dec 2024 | Natural Gas |
| Sudbury Solar | Ecos Energy LLC | Sudbury, VT | 2 GWh | Apr 2016 | Dec 2024 | Solar |
| SJA Solar LLC-Solterra Monastery CSG | SJA Solar, LLC | Spencer, MA | 27 GWh | Nov 2016 | Dec 2024 | Solar |
| Pfizer Groton Fuel Cell | Groton Fuel Cell 1 LLC | Groton, CT | 30 GWh | Sep 2016 | Dec 2024 | Natural Gas |
| Pisgah Mountain Wind | Pisgah Mountain, LLC | Clifton, ME | 25 GWh | Nov 2016 | Dec 2024 | Wind |
| Coventry Photovoltaic, LLC | Coventry Photovoltaic, LLC | Coventry, VT | 2 GWh | Jul 2014 | Dec 2024 | Solar |
| Fairhaven C CSG | MN8 Energy LLC | Fairhaven, MA | 3 GWh | Apr 2017 | Dec 2024 | Solar |
| West Bridgewater AB CSG | MN8 Energy LLC | West Bridgewater, MA | 3 GWh | May 2017 | Dec 2024 | Solar |
| Carver MA 1 Community Solar | Navisun LLC | Carver, MA | 3 GWh | Aug 2016 | Dec 2024 | Solar |
| Wareham MA 1 Community Solar | Navisun LLC | Wareham, MA | 3 GWh | Aug 2016 | Dec 2024 | Solar |
| Athens Energy | Athens Energy, LLC | Athens, ME | 58 GWh | Sep 2016 | Dec 2024 | Wood/Wood Waste Solids |
| Hardwick-Athol & Eagle Hill | SEC CRSD Solar One, LLC | Hardwick, MA | 3 GWh | Jun 2015 | Dec 2024 | Solar |
| UI RCP Woodbridge FC | United Illuminating Co | Woodbridge, CT | 18 GWh | Nov 2016 | Dec 2024 | Natural Gas |
Surrounding Balancing Authorities
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #61 | Alcoa Power Generating, Inc. - Yadkin Division | 696.7 GWh | 4 |
| #25 | Dominion Energy South Carolina, Inc. | 25.7 TWh | 87 |
| #13 | Duke Energy Carolinas | 112.5 TWh | 565 |
| #17 | Duke Energy Progress East | 64.3 TWh | 559 |
| #52 | Duke Energy Progress West | 4.3 TWh | 10 |
| #24 | Louisville Gas and Electric Company and Kentucky Utilities Company | 34.4 TWh | 25 |
| #12 | New York Independent System Operator | 131.6 TWh | 1,211 |
| #1 | PJM Interconnection, LLC | 870.7 TWh | 2,465 |
| #30 | South Carolina Public Service Authority | 18.9 TWh | 34 |
| #59 | Southeastern Power Administration | 1.5 TWh | 11 |
Balancing Authorities with Similar Net Generation
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #7 | California Independent System Operator | 188.0 TWh | 2,075 |
| #9 | Tennessee Valley Authority | 161.6 TWh | 204 |
| #10 | Florida Power & Light Co. | 148.9 TWh | 187 |
| #12 | New York Independent System Operator | 131.6 TWh | 1,211 |
| #13 | Duke Energy Carolinas | 112.5 TWh | 565 |
| #15 | ISO New England | 105.5 TWh | 1,577 |
| #16 | Bonneville Power Administration | 80.5 TWh | 163 |
| #17 | Duke Energy Progress East | 64.3 TWh | 559 |
| #18 | PacifiCorp East | 61.1 TWh | 216 |
| #19 | Salt River Project Agricultural Improvement and Power District | 60.0 TWh | 48 |