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 |
|---|---|---|---|---|---|---|
| Skyline Solar | SoCore Energy LLC | Lanesborough, MA | 8 GWh | Aug 2022 | Dec 2025 | Solar |
| Saddleback Solar | SoCore Energy LLC | Lanesborough, MA | 4 GWh | Aug 2022 | Dec 2024 | Solar |
| Partridge Solar | SoCore Energy LLC | Lanesborough, MA | 8 GWh | Aug 2022 | Dec 2025 | Solar |
| Jericho Landfill Solar Farm | SoCore Energy LLC | Jerico, VT | 1 GWh | Dec 2020 | Dec 2025 | Solar |
| Jericho Gravel Solar Farm | SoCore Energy LLC | Jerico, VT | 2 GWh | Dec 2020 | Dec 2025 | Solar |
| Caribou Solar | SoCore Energy LLC | Caribou, ME | 6 GWh | Nov 2024 | Dec 2025 | Solar |
| Madawaska Solar | SoCore Energy LLC | Saint David, ME | 4 GWh | Nov 2024 | Dec 2025 | Solar |
| French Road Solar | SoCore Energy LLC | Ashland, ME | 3 GWh | Nov 2024 | Dec 2025 | Solar |
| VEC Alburgh Array | SoCore Energy LLC | Alburgh, VT | 1 GWh | Nov 2016 | Dec 2025 | Solar |
| VEC Magee Hill Solar | SoCore Energy LLC | Hinesburgh, VT | 2 GWh | Oct 2017 | Dec 2025 | Solar |
| Smithfield Solar Farm, LLC | Smithfield Solar Farm | Smithfield, RI | 4 GWh | Jun 2020 | Dec 2025 | Solar |
| TES Rowtier | SkyHigh 2 Solar | Westminster, MA | 10 GWh | Mar 2021 | Dec 2025 | Solar |
| SJA Solar LLC-Solterra Monastery CSG | SJA Solar, LLC | Spencer, MA | 24 GWh | Nov 2016 | Dec 2025 | Solar |
| Hillsborough Hosiery | Silverstreet Hydro | Hillsboro, NH | 2 GWh | Nov 1989 | Dec 2024 | Water |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | 65 GWh | May 2010 | Dec 2025 | Natural Gas : 99.9% |
| ME - EDF - Phase II - Belfast | Shining Solar Partners, LLC | Belfast, ME | 8 GWh | Aug 2024 | Dec 2025 | Solar |
| Milton Hydro | SFR Hydro Cor | Milton, NH | 5 GWh | Dec 1913 | Dec 2025 | Water |
| Settlers Solar | Settlers Solar, LLC | Lunenberg, MA | 7 GWh | Nov 2020 | Dec 2025 | Solar |
| SEMASS Resource Recovery | SEMASS Partnership | West Wareham, MA | 553 GWh | Jun 1988 | May 2026 | Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Natural Gas : 1.7% |
| Scituate Wind | Scituate Wind LLC | Scituate, MA | 3 GWh | Feb 2012 | Dec 2025 | Wind |
| Somerset Plant | Sappi Fine Paper North America-Somerset | Skowhegan, ME | 568 GWh | Dec 1975 | May 2026 | Black Liquor : 45.9% Wood/Wood Waste Solids : 32.4% Natural Gas : 13.1% Tire-derived Fuels : 4.1% Residual Fuel Oil : 3.7% Sludge Waste : 0.5% |
| Sanford Solar | Sanford Airport Solar, LLC | Sanford, ME | 87 GWh | Oct 2020 | May 2026 | Solar |
| Sampson Road Community Solar | Sampson Road Solar, LLC | Charlton, MA | 3 GWh | Nov 2017 | Dec 2025 | Solar |
| Samoset Solar | Samoset Solar, LLC | Rockport, ME | 4 GWh | Jun 2023 | Dec 2025 | Solar |
| Salem Harbor Power Development LP | Salem Harbor Power Development LP | Salem, MA | 2 TWh | Apr 2018 | May 2026 | Natural Gas |
| Ryegate Associates, LLC | Ryegate Associates, LLC | East Ryegate, VT | 158 GWh | Aug 1992 | Dec 2025 | Wood/Wood Waste Solids |
| Future Generation Wind | RWE Clean Energy | Plymouth, MA | 12 GWh | Jul 2016 | Nov 2025 | Wind |
| UMASS | RWE Clean Energy | Amherst, MA | 5 GWh | Sep 2016 | Dec 2025 | Solar |
| Dartmouth Solar | RWE Clean Energy | Dartmouth, MA | 2 GWh | Feb 2011 | Dec 2025 | Solar |
| CED Foster | RWE Clean Energy | Foster, RI | 3 GWh | Nov 2017 | May 2026 | Solar |
| CED Westfield Solar, LLC | RWE Clean Energy | Westfield, MA | 3 GWh | Jul 2016 | Dec 2025 | Solar |
| Shrewsbury Solar | RWE Clean Energy | Shrewsbury, MA | 4 GWh | Sep 2012 | Dec 2025 | Solar |
| Padelford Solar | RWE Clean Energy | Berkley, MA | 4 GWh | Nov 2012 | Dec 2025 | Solar |
| Technology Drive Solar | RWE Clean Energy | Brattleboro, VT | 3 GWh | Aug 2014 | Dec 2025 | Solar |
| Northbridge Solar | RWE Clean Energy | South Grafton, MA | 3 GWh | Jul 2013 | Dec 2025 | Solar |
| CED Northampton Solar LLC Hybrid | RWE Clean Energy | Northampton, MA | 6 GWh | Nov 2019 | Dec 2025 | Solar |
| Merrimac Solar | RWE Clean Energy | Merrimac, MA | 2 GWh | Nov 2013 | Dec 2025 | Solar |
| Quittacas Pond Solar | RWE Clean Energy | Rochester, MA | 5 GWh | Nov 2013 | Dec 2025 | Solar |
| Tihonet Solar | RWE Clean Energy | Wareham, MA | 2 GWh | Apr 2014 | Dec 2025 | Solar |
| Groveland Solar | RWE Clean Energy | Groveland, MA | 4 GWh | Nov 2012 | Dec 2025 | Solar |
| Douglas Solar | RWE Clean Energy | Douglas, MA | 3 GWh | Nov 2012 | Dec 2025 | Solar |
| Wilson Solar (MA) | RWE Clean Energy | Spencer, MA | 870 MWh | May 2013 | Dec 2025 | Solar |
| West Greenwich Solar | RWE Clean Energy | West Greenwich, RI | 2 GWh | Apr 2013 | May 2026 | Solar |
| Dartmouth II Solar | RWE Clean Energy | Dartmouth, MA | 3 GWh | May 2012 | Dec 2025 | Solar |
| Boston Scientific Solar | RWE Clean Energy | Quincy, MA | 1 GWh | Nov 2012 | Dec 2025 | Solar |
| CED Chicopee Solar | RWE Clean Energy | Chicopee, MA | 5 GWh | Jun 2017 | Dec 2025 | Solar |
| Fairhaven MA 2 | RWE Clean Energy | Fairhaven, MA | 4 GWh | Aug 2021 | Dec 2025 | Solar |
| UMass PV Lot 22 | RWE Clean Energy | Amherst, MA | 3 GWh | Aug 2022 | Dec 2025 | Solar |
| Rumford Power LLC | Rumford Power | Rumford, ME | 793 GWh | Jun 2000 | Dec 2025 | Natural Gas |
| RT405 Westerlo Solar 2 | RT405 Westerlo Solar 2, LLC | Albany, NY | 8 GWh | Feb 2020 | Dec 2025 | Solar |
| Alexander Road Solar | RPNY Solar 7, LLC | Batavia, NY | 3 GWh | Jun 2024 | Dec 2025 | Solar |
| Pike Road Solar (NY) | RPNY Solar 6, LLC | Batavia, NY | 5 GWh | Jun 2024 | Dec 2025 | Solar |
| Clemons Road Solar | RPNY Solar 4, LLC | Minoa, NY | 4 GWh | Jun 2024 | Dec 2025 | Solar |
| RoxWind | RoxWind LLC | Roxbury, ME | 44 GWh | Oct 2021 | Dec 2025 | Wind |
| Rounseville Solar | Rounseville Solar 1, LLC | Rochester, MA | 4 GWh | Jan 2020 | Dec 2025 | Solar |
| Rochester MA 2 | Rochester MA 2 LLC | Rochester, MA | 1 GWh | Nov 2018 | Dec 2025 | Solar |
| Robin Hollow Solar | Robin Hollow Solar, LLC | West Greenwich, RI | 69 GWh | Nov 2023 | May 2026 | Solar |
| Georges River Energy | Robbins Lumber Inc | Searsmont, ME | 52 GWh | Nov 2018 | Dec 2024 | Wood/Wood Waste Solids |
| Rhode Island State Energy Center | RISEC Operating Services | Johnston, RI | 4 TWh | Sep 2002 | Apr 2026 | Natural Gas |
| Rhode Island Solar Renewable Energy IV, | Rhode Island Solar Renewable Energy IV, LLC | Tiverton, RI | 18 GWh | Nov 2023 | Dec 2025 | Solar |
| Johnston LFG Turbine Plant | Rhode Island LFG Genco | Johnston, RI | 173 GWh | Apr 2013 | May 2026 | Landfill Gas |
| Ridgewood Providence Power | Rhode Island LFG Genco | Johnston, RI | 4 GWh | Jul 2005 | Dec 2025 | Landfill Gas |
| Rhode Island Hospital | Rhode Island Hospital | Providence, RI | 53 GWh | Sep 1974 | May 2026 | Natural Gas : 87.3% Residual Fuel Oil : 12.7% |
| Alton Road Solar | Revity Energy LLC | Bradford, RI | 24 GWh | Nov 2019 | Dec 2025 | Solar |
| S D Warren Westbrook | Relevate Power Management LLC | Westbrook, ME | 15 GWh | Dec 1902 | Dec 2025 | Water |
| ReEnergy Stratton LLC | ReEnergy Stratton LLC | Stratton, ME | 200 GWh | Oct 1989 | Dec 2025 | Wood/Wood Waste Solids |
| ReEnergy Livermore Falls | ReEnergy Livermore Falls | Livermore Falls, ME | 274 GWh | Jul 1992 | Dec 2025 | Wood/Wood Waste Solids |
| Redbrook Community Solar 1 | Redbrook Solar 1, LLC | Plympton, MA | 1 GWh | Sep 2017 | Dec 2025 | Solar |
| Record Hill Wind | Record Hill Wind LLC | Roxbury, ME | 110 GWh | Dec 2011 | Dec 2025 | Wind |
| Happy Hollow CSG Hybrid | REA Investments, LLC | Winchendon, MA | 9 GWh | Sep 2019 | Dec 2024 | Solar |
| Washburn Road Solar | REA Investments, LLC | Freetown, MA | 3 GWh | Nov 2018 | Dec 2025 | Solar |
| Ward Solar 1, LLC | REA Investments, LLC | Carver, MA | 3 GWh | Jan 2019 | Dec 2025 | Solar |
| Skyway Avenue Solar Farm | REA Investments, LLC | Frenchville, ME | 3 GWh | Feb 2024 | Dec 2025 | Solar |
| Augusta Road Bowdoin Solar, LLC | REA Investments, LLC | Bowdoin, ME | 5 GWh | Jan 2022 | Dec 2025 | Solar |
| Sheridan Road Solar Farm | REA Investments, LLC | Ashland, ME | 4 GWh | Jul 2024 | Dec 2025 | Solar |
| Route 3 China Solar, LLC | REA Investments, LLC | China, ME | 8 GWh | Nov 2022 | Dec 2025 | Solar |
| Houlton Road Solar Farm (CSG) | REA Investments, LLC | Fort Fairfield, ME | 2 GWh | Nov 2024 | Dec 2025 | Solar |
| Plympton Lake Street Solar | REA Investments, LLC | Plympton, MA | 2 GWh | Nov 2022 | Dec 2025 | Solar |
| Mariaville Road Elsworth Solar, LLC | REA Investments, LLC | Ellsworth, ME | 1 GWh | Apr 2022 | Dec 2025 | Solar |
| Plympton Main Street Solar, LLC | REA Investments, LLC | Plympton, MA | 7 GWh | Nov 2023 | Dec 2025 | Solar |
| Perkins Road Belfast Solar, LLC | REA Investments, LLC | Belfast, ME | 9 GWh | May 2021 | Dec 2025 | Solar |
| Nutting Ridge Solar, LLC | REA Investments, LLC | Otisfield, ME | 7 GWh | May 2023 | Dec 2025 | Solar |
| Market Street Gardiner Solar, LLC | REA Investments, LLC | Gardiner, ME | 6 GWh | Jun 2022 | Dec 2025 | Solar |
| North Nobleboro Road, LLC | REA Investments, LLC | Waldoboro, ME | 4 GWh | May 2021 | Dec 2025 | Solar |
| Church Hill Road Augusta Solar, LLC | REA Investments, LLC | Augusta, ME | 7 GWh | Jan 2022 | Dec 2025 | Solar |
| Canton GLC Solar, LLC | REA Investments, LLC | Canton, ME | 5 GWh | Mar 2024 | Dec 2025 | Solar |
| Rand Whitney CHP Plant | Rand Whitney Containerboard L.P. | Montville, CT | 132 GWh | Mar 2005 | May 2026 | Natural Gas |
| Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, CT | 74 GWh | Nov 2021 | May 2026 | Solar |
| Quinebaug Lower Project | Quinebaug Associates LLC | Brooklyn, CT | 5 GWh | Mar 1990 | Dec 2025 | Water |
| Williams College - Campus CHP | President & Trustees of Williams College | Williamstown, MA | 3 GWh | Feb 2003 | Dec 2025 | Natural Gas : 98.4% Distillate Fuel Oil : 1.6% |
| Berkshire 1 | PPS Berkshire Solar LLC | Sheffield, MA | 2 GWh | Nov 2011 | Dec 2024 | Solar |
| Corbin Russwin Phase 3 Berlin | Powerflex | Berlin, CT | 2 GWh | Mar 2018 | Dec 2025 | Solar |
| Ticket Network South Windsor | Powerflex | South Windsor, CT | 2 GWh | Apr 2018 | Dec 2024 | Solar |
| ALDI DC 2 | Powerflex | South Windsor, CT | 1 GWh | Jan 2018 | Dec 2025 | Solar |
| Pontook Hydro Facility | Pontook Operating LP | Dummer, NH | 51 GWh | Nov 1986 | Dec 2025 | Water |
| Pleasantdale Road Community Solar | Pleasantdale Road Solar, LLC | Rutland, MA | 1 GWh | Aug 2017 | Dec 2025 | Solar |
| Plainfield Community Solar LLC | Plainfield Solar LLC | Plainfield, MA | 3 GWh | Jan 2019 | Dec 2025 | Solar |
| Plainfield Renewable Energy LLC | Plainfield Renewable Energy, LLC | Plainfield, CT | 245 GWh | Nov 2013 | Dec 2025 | Wood/Wood Waste Solids : 99.3% Other Biomass Liquids : 0.7% |
| Pittsfield Solar LLC | Pittsfiled Solar LLC | Pittsfield, ME | 15 GWh | Nov 2017 | Dec 2025 | Solar |
| Pittsfield Generating LP | Pittsfield Generating Company, LP | Pittsfield, MA | 136 GWh | Jun 1990 | May 2026 | Natural Gas : 96.9% Distillate Fuel Oil : 3.1% |
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 |