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 | Oct 2026 |
| Annual Generation | 112.2 TWh |
| Power Plants | 1,667 |
| Utilities | 846 |
| 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% Nuclear | 25.3% Wind | 5.7% Water | 4.6% Other Fuel | 4.5% Solar | 1.6% Coal | 0% |
Map of ISO New England
Register Now for Comprehensive Access
Subscribe now to access all power plant data, utility information, FERC EQR data, and more for ISO New England.
Daily Net Generation for ISO New England for the past 3 Years
| Plant Name | Utility | Location | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|
| Kearsarge Concord II | Kearsarge Concord II LLC | Concord, MA | 7 GWh | Dec 2016 | Dec 2025 | Solar |
| Kearsarge Granby | Kearsarge Granby LLC | Granby, MA | 4 GWh | Feb 2017 | Dec 2025 | Solar |
| IKEA New Haven Rooftop PV & Fuel Cell | IKEA Property Inc | New Haven, CT | 3 GWh | Jun 2012 | Dec 2025 | Natural Gas : 71.5% Solar : 28.5% |
| Hope Farm Solar, LLC | Adapture Renewables, Inc. | Cranston, RI | 16 GWh | Aug 2019 | Dec 2025 | Solar |
| Toray Plastic America's CHP Plant | Toray Plastics America | North Kingstown, RI | 157 GWh | Dec 2002 | Dec 2025 | Natural Gas |
| Saint Albans Solar | Cypress Creek Renewables | Georgia, VT | 7 GWh | Sep 2018 | Dec 2025 | Solar |
| Franklin Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Wilson Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Jefferson Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Dec 2017 | Dec 2025 | Solar |
| Hamilton Solar | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Adams Solar | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Wareham Solar PV | NSTAR Electric Company | Wareham, MA | 1 GWh | Nov 2018 | Dec 2025 | Solar |
| East Longmeadow Solar PV | NSTAR Electric Company | East Longmeadow, MA | 8 GWh | Sep 2019 | Dec 2025 | Solar |
| Greenfield Solar PV | NSTAR Electric Company | Greenfield, MA | 3 GWh | Dec 2018 | Dec 2025 | Solar |
| Hinsdale Solar PV | NSTAR Electric Company | Hinsdale, MA | 3 GWh | Dec 2018 | Dec 2025 | Solar |
| Savoy Solar PV | NSTAR Electric Company | Savoy, MA | 3 GWh | Jan 2019 | Dec 2025 | Solar |
| Southampton Solar PV | NSTAR Electric Company | Southampton, MA | 3 GWh | Jan 2019 | Dec 2025 | Solar |
| Springfield Solar PV | NSTAR Electric Company | Springfield, MA | 6 GWh | Dec 2018 | Dec 2025 | Solar |
| Hampden Solar PV | NSTAR Electric Company | Hampden, MA | 6 GWh | Oct 2019 | Dec 2025 | Solar |
| Town of Branford | Tesla Inc. | Branford, CT | 2 GWh | May 2018 | Dec 2025 | Solar |
| Sunderland Solar PV | NSTAR Electric Company | Sunderland, MA | 2 GWh | Aug 2018 | Dec 2025 | Solar |
| Hatfield Solar PV | NSTAR Electric Company | Hatfield, MA | 5 GWh | Nov 2018 | Dec 2025 | Solar |
| East Springfield Solar PV | NSTAR Electric Company | Springfield, MA | 2 GWh | Sep 2018 | Dec 2025 | Solar |
| Ludlow Site 72 - Conti | NSTAR Electric Company | Ludlow, MA | 3 GWh | Jul 2018 | Dec 2025 | Solar |
| WED Plainfield II, LLC | WED Plainfield II, LLC | Johnston, RI | 8 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Plainfield III, LLC | WED Plainfield III, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Plainfield, LLC | WED Plainfield, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Shun II, LLC | WED Shun II, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Shun III, LLC | WED Shun III, LLC | Johnston, RI | 8 GWh | Dec 2018 | Dec 2025 | Wind |
| WED GW Solar, LLC | CleanCapital Holdings | Lincoln, RI | 4 GWh | Dec 2018 | Dec 2025 | Solar |
| Palmer | AES Distributed Energy | Palmer, MA | 6 GWh | Sep 2019 | Dec 2025 | Solar |
| Hadley 2 Solar, LLC CSG | Hadley 2 Solar, LLC | Hadley, MA | 3 GWh | Nov 2016 | Dec 2025 | Solar |
| East Bridgewater Solar | Altus Power America Management, LLC | East Bridgewater, MA | 3 GWh | Oct 2017 | Dec 2025 | Solar |
| Griffin Road Solar, LLC CSG | Griffin Road Solar, LLC | Charlton, MA | 3 GWh | Feb 2018 | Dec 2025 | Solar |
| Ashby Solar, LLC CSG | Ashby Solar, LLC | Fitchburg, MA | 3 GWh | Jun 2018 | Dec 2025 | Solar |
| Dudley Solar CSG | Dudley Solar, LLC | Dudley, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Williamsburg | AES Distributed Energy | Goshen, MA | 6 GWh | Jun 2019 | Dec 2025 | Solar |
| Monson Solar, LLC | Monson Solar, LLC | Monson, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Westminster Renewables, LLC CSG | Westminster Renewables, LLC | Westminster, MA | 2 GWh | Sep 2018 | Dec 2025 | Solar |
| Pittsfield 44 - M&W PV | NSTAR Electric Company | Pittsfield, MA | 2 GWh | Jul 2018 | Dec 2025 | Solar |
| Lee Site 31 Solar | NSTAR Electric Company | Lee, MA | 149 MWh | Jul 2018 | Dec 2025 | Solar |
| Plymouth Solar | NSTAR Electric Company | Plymouth, MA | 2 GWh | May 2018 | Dec 2025 | Solar |
| North Stonington Solar Center, LLC | Adapture Renewables, Inc. | North Stonington, CT | 32 GWh | Sep 2022 | Dec 2025 | Solar |
| Dynamic - Walpole | AES Distributed Energy | Walpole, MA | 2 GWh | May 2017 | Dec 2025 | Solar |
| Barre Solar III LLC | AES Distributed Energy | Barre, MA | 1 GWh | Feb 2018 | Dec 2025 | Solar |
| BWC Origination 18 | BWC Origination 18, LLC | Mattapoisett, MA | 7 GWh | Nov 2018 | Dec 2025 | Solar |
| BWC Gibbs Brook | BWC Gibbs Brook, LLC | Wareham, MA | 7 GWh | Nov 2018 | Dec 2025 | Solar |
| BWC Wareham River | BWC Wareham River, LLC | Wareham, MA | 2 GWh | Nov 2018 | Dec 2025 | Solar |
| BWC Harlow Brook | BWC Harlow Brook, LLC | Wareham, MA | 2 GWh | Nov 2018 | Dec 2025 | Solar |
| BWC Pocasset River | BWC Pocasset River, LLC | Wareham, MA | 2 GWh | Nov 2018 | Dec 2025 | Solar |
| Westminster | MN8 Energy LLC | Westminster, VT | 2 GWh | Nov 2016 | Dec 2025 | Solar |
| Winchendon Landfill Solar | Onyx Asset Services Group | Winchendon, MA | 2 GWh | Sep 2018 | Dec 2025 | Solar |
| Kearsarge GB | Kearsarge GB LLC | Great Barrington, MA | 3 GWh | Jul 2018 | Dec 2025 | Solar |
| Kearsarge SKSC1 LLC | Kearsarge SKSC1 LLC | South Kingstown, RI | 5 GWh | Sep 2018 | Dec 2025 | Solar |
| Kearsarge Uxbridge | Kearsarge Uxbridge LLC | Uxbridge, MA | 3 GWh | Aug 2018 | Dec 2025 | Solar |
| Kearsarge Montague | Kearsarge Montague LLC | Montague, MA | 7 GWh | May 2018 | Dec 2025 | Solar |
| Kearsarge SKSC2 LLC | Kearsarge SKSC2 LLC | South Kingstown, RI | 6 GWh | Sep 2018 | Dec 2025 | Solar |
| Kearsarge Wilmington | Kearsarge Wilmington LLC | Wilmington, MA | 2 GWh | Nov 2017 | Dec 2025 | Solar |
| GD Richmond Buttonwoods I, LLC | CleanCapital Holdings | Richmond, RI | 2 GWh | Nov 2019 | Dec 2025 | Solar |
| GD West Greenwich Victory I, LLC | CleanCapital Holdings | West Greenwich, RI | 3 GWh | Nov 2019 | Dec 2025 | Solar |
| Plainfield Community Solar LLC | Plainfield Solar LLC | Plainfield, MA | 3 GWh | Jan 2019 | Dec 2025 | Solar |
| Tolland Solar NG LLC | NuGen Capital Management | Tolland, MA | 5 GWh | Sep 2014 | Dec 2025 | Solar |
| Tanglewood Circle Solar 1 LLC | Tanglewood Circle Solar 1 LLC | Becket, MA | 7 GWh | Oct 2018 | Dec 2025 | Solar |
| Derby Fuel Cell | Derby Fuel Cell LLC | Derby, CT | 110 GWh | Dec 2023 | Dec 2025 | Natural Gas |
| ALDI DC 2 | Powerflex | South Windsor, CT | 1 GWh | Jan 2018 | Dec 2025 | Solar |
| West Water Street | City of Taunton - (MA) | Taunton, MA | 2 GWh | Dec 2017 | Dec 2025 | Distillate Fuel Oil |
| Manchester Community College East | Onyx Asset Services Group | Manchester, CT | 2 GWh | Sep 2018 | Dec 2025 | Solar |
| Manchester Community College North | Onyx Asset Services Group | Great Path, CT | 885 MWh | Sep 2018 | Dec 2025 | Solar |
| GD Glocester White Oak I, LLC | GD Glocester White Oak I, LLC | Glocester, RI | 3 GWh | Nov 2020 | Dec 2025 | Solar |
| Blodgett Solar CSG | Blodgett Street Solar 1, LLC | Tyngsboro, MA | 9 GWh | Jul 2021 | Dec 2025 | Solar |
| Kearsarge Montague BD(CSG) | Kearsarge Montague BD LLC | Montague, MA | 3 GWh | Oct 2021 | Dec 2025 | Solar |
| Kearsarge Upper Union | Kearsarge Upper Union LLC | Franklin, MA | 2 GWh | Feb 2023 | Dec 2025 | Solar |
| Kearsarge Haverhill | Kearsarge Haverhill LLC | Haverhill, MA | 4 GWh | Feb 2021 | Dec 2025 | Solar |
| Kearsarge William Way | Kearsarge William Way LLC | Bellingham, MA | 7 GWh | Nov 2021 | Dec 2025 | Solar |
| TPE King Solar Holdings1, LLC (CSG) | Nautilus Solar Solutions | North Smithfield, RI | 18 GWh | Mar 2022 | Dec 2025 | Solar |
| Westport B Community Solar Garden | BWC Hamilton Brook LLC | Westport, MA | 8 GWh | Oct 2018 | Dec 2025 | Solar |
| Adirondack A+B Community Solar Garden | BWC Connecticut River LLC | Westport, MA | 9 GWh | Nov 2018 | Dec 2025 | Solar |
| Dover (MA) | BWC Buckmaster Pond LLC | Dover, MA | 2 GWh | Jul 2017 | Dec 2025 | Solar |
| Mendon | BWC Box Pond LLC | Mendon, MA | 3 GWh | Nov 2017 | Dec 2025 | Solar |
| Westport Community Solar Garden | BWC Bass River LLC | Westport, MA | 2 GWh | Jun 2017 | Dec 2025 | Solar |
| Joe Jenny | AMP MA Joe Jenny | Oxford, MA | 2 GWh | Apr 2018 | Dec 2025 | Solar |
| Dudley | AMP MA Dudley | Dudley, MA | 8 GWh | Jun 2018 | Dec 2025 | Solar |
| Wallingford Solar | Wallingford Renewable Energy, LLC | Wallingford, CT | 15 GWh | Aug 2021 | Dec 2025 | Solar |
| Smithfield Solar Farm, LLC | Smithfield Solar Farm | Smithfield, RI | 4 GWh | Jun 2020 | Dec 2025 | Solar |
| Norton | Madison Energy Holdings LLC | Norton, MA | 2 GWh | Feb 2023 | Dec 2025 | Solar |
| Woodville Solar (CSG) | Standard Solar | Woodville, RI | 5 GWh | Nov 2024 | Dec 2025 | Solar |
| Raboth - Marion Drive | Madison Energy Holdings LLC | Kingston, MA | 4 GWh | Feb 2021 | Dec 2025 | Solar |
| Merrimack Solar Farm, LLC | Merrimack Solar Farm | Merrimack, NH | 3 GWh | Dec 2018 | Dec 2025 | Solar |
| Golden Solar | Cardinal Renewables | St. Johnsbury, VT | 4 GWh | Oct 2021 | Dec 2025 | Solar |
| Dresser Hill CSG | Dresser Hill Solar, LLC | Southbridge, MA | 6 GWh | Dec 2020 | Dec 2025 | Solar |
| Wilmarth Solar | Wilmarth Lane Solar 1, LLC | Plainville, MA | 8 GWh | Jan 2020 | Dec 2025 | Solar |
| Town of Ware - Canadian Tree(CSG) | MA CS Ware West, LLC | Ware, MA | 2 GWh | Nov 2021 | Dec 2025 | Solar |
| Rounseville Solar | Rounseville Solar 1, LLC | Rochester, MA | 4 GWh | Jan 2020 | Dec 2025 | Solar |
| Breckenridge Solar | Breckenridge Street Solar 1, LLC | Palmer, MA | 6 GWh | Oct 2020 | Dec 2025 | Solar |
| Elm Street | ISM Solar Dighton 3, LLC | Dighton, MA | 5 GWh | Nov 2020 | Dec 2025 | Solar |
| Wilbraham | BWC East Brook, LLC | Wilbraham, MA | 6 GWh | Nov 2020 | Dec 2025 | Solar |
| Georges River Energy | Robbins Lumber Inc | Searsmont, ME | 51 GWh | Nov 2018 | Dec 2025 | Wood/Wood Waste Solids |
| ZPD-PT Solar Project 2017-006 LLC Hybrid | AES Distributed Energy | Warren, MA | 6 GWh | Jun 2021 | Dec 2025 | Solar |
| Plainfield Solar 1 | Ecos Energy LLC | Plainfield, CT | 2 GWh | Dec 2019 | Dec 2025 | Solar |
| East Brookfield Adams Road Solar LLC CSG | East Brookfield Adams Road Solar LLC | East Brookfield, MA | 7 GWh | May 2021 | Dec 2025 | Solar |
Surrounding Balancing Authorities
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #61 | Alcoa Power Generating, Inc. - Yadkin Division | 433.0 GWh | 4 |
| #24 | Dominion Energy South Carolina, Inc. | 26.1 TWh | 83 |
| #13 | Duke Energy Carolinas | 113.4 TWh | 578 |
| #17 | Duke Energy Progress East | 66.2 TWh | 574 |
| #50 | Duke Energy Progress West | 4.6 TWh | 15 |
| #23 | Louisville Gas and Electric Company and Kentucky Utilities Company | 34.2 TWh | 25 |
| #12 | New York Independent System Operator | 134.1 TWh | 1,334 |
| #1 | PJM Interconnection, LLC | 890.9 TWh | 2,806 |
| #28 | South Carolina Public Service Authority | 19.6 TWh | 35 |
| #59 | Southeastern Power Administration | 1.2 TWh | 11 |
Balancing Authorities with Similar Net Generation
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #7 | California Independent System Operator | 168.7 TWh | 2,170 |
| #9 | Tennessee Valley Authority | 166.2 TWh | 209 |
| #10 | Florida Power & Light Co. | 153.0 TWh | 188 |
| #12 | New York Independent System Operator | 134.1 TWh | 1,334 |
| #13 | Duke Energy Carolinas | 113.4 TWh | 578 |
| #15 | ISO New England | 112.2 TWh | 1,667 |
| #16 | Bonneville Power Administration | 91.1 TWh | 170 |
| #17 | Duke Energy Progress East | 66.2 TWh | 574 |
| #18 | PacifiCorp East | 61.4 TWh | 223 |
| #19 | Salt River Project Agricultural Improvement and Power District | 60.5 TWh | 51 |