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% |
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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 |
|---|---|---|---|---|---|---|
| Stone Hill Solar CSG | MN8 Energy LLC | North Easton, MA | 2 GWh | Jun 2014 | Dec 2025 | Solar |
| Dry Bridge Solar (Brown University) | MN8 Energy LLC | North Kingstown, RI | 63 GWh | Oct 2023 | Jul 2026 | Solar |
| Westminster | MN8 Energy LLC | Westminster, VT | 2 GWh | Nov 2016 | Dec 2025 | Solar |
| Deerfield CSG Solar | MN8 Energy LLC | Deerfield, MA | 4 GWh | Nov 2017 | Dec 2025 | Solar |
| Westford Solar Park | MN8 Energy LLC | Westford, MA | 4 GWh | Mar 2012 | Dec 2025 | Solar |
| Bridgewater Solar CSG | MN8 Energy LLC | Bridgewater, MA | 4 GWh | Jul 2015 | Dec 2025 | Solar |
| Holliston Solar CSG | MN8 Energy LLC | Holliston, MA | 1 GWh | Jun 2015 | Dec 2025 | Solar |
| Wilmington Solar | MN8 Energy LLC | Wilmington, MA | 2 GWh | Oct 2015 | Dec 2025 | Solar |
| Fairhaven C CSG | MN8 Energy LLC | Fairhaven, MA | 2 GWh | Apr 2017 | Dec 2025 | Solar |
| West Bridgewater AB CSG | MN8 Energy LLC | West Bridgewater, MA | 3 GWh | May 2017 | Dec 2025 | Solar |
| Rockland Solar CSG | MN8 Energy LLC | Rockland, MA | 2 GWh | Nov 2013 | Dec 2025 | Solar |
| Fall River Solar CSG | MN8 Energy LLC | Fall River, MA | 2 GWh | Jan 2013 | Dec 2025 | Solar |
| Antares-GRE 314 East Lyme LLC | MN8 Energy LLC | East Lyme, CT | 4 GWh | May 2014 | Jul 2026 | Solar |
| Barrett PV | MN8 Energy LLC | Oxford, MA | 17 GWh | Oct 2016 | Dec 2025 | Solar |
| Grafton PV | MN8 Energy LLC | Grafton, MA | 4 GWh | Sep 2016 | Dec 2025 | Solar |
| Dynamic Madison (CSG) | MN8 Energy LLC | Madison, ME | 10 GWh | Jul 2022 | Dec 2025 | Solar |
| Dynamic Corinth (CSG) | MN8 Energy LLC | Corinth, ME | 10 GWh | Sep 2022 | Dec 2025 | Solar |
| Kenmare - Mansfield Branch Street | MN8 Energy LLC | Mansfield, MA | 2 GWh | May 2017 | Dec 2025 | Solar |
| Monson Solar, LLC | Monson Solar, LLC | Monson, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Montague Road Solar | Montague Road Solar, LLC | Amherst, MA | 4 GWh | Nov 2019 | Dec 2025 | Solar |
| Montville Station | Montville Power LLC | Uncasville, CT | 133 GWh | Dec 1953 | Dec 2025 | Residual Fuel Oil : 74.2% Natural Gas : 24.9% Distillate Fuel Oil : 0.9% |
| UMass Boston | MSS Energy Holdings, LLC (d.b.a. Calibrant Energy) | Dorchester, MA | 1 GWh | Dec 1971 | Dec 2025 | Solar |
| Mt Wachusett Community College | Mt Wachusett Community College | Gardner, MA | 5 GWh | Feb 2011 | Jul 2026 | Wind |
| Mt. Tom Solar Project Hybrid | Mt. Tom Solar, LLC | Holyoke, MA | 4 GWh | Dec 2016 | Dec 2025 | Solar |
| Charlestown Wind Turbine | MWRA Charlestown | Charlestown, MA | 1 GWh | Sep 2011 | Dec 2025 | Wind |
| Naples | Naples Casco Solar 1, LLC | Naples, ME | 3 GWh | Nov 2021 | Dec 2025 | Solar |
| NBC Field's Point Wind Farm | Narragansett Bay Commission | Providence, RI | 7 GWh | Sep 2012 | Jul 2026 | Wind |
| Natick Mall | Natick Mall | Natick, MA | 4 GWh | Dec 2014 | Dec 2024 | Solar |
| Nationwide | Nationwide Solar Energy LLC | Lancaster, MA | 5 GWh | May 2021 | Dec 2025 | Solar |
| Sanford -NY | Nautilus Solar Solutions | Sanford, ME | 8 GWh | Jan 2024 | Dec 2025 | Solar |
| Sanford CGA | Nautilus Solar Solutions | Sanford, ME | 8 GWh | May 2022 | Dec 2025 | Solar |
| Sabattus SB01 | Nautilus Solar Solutions | Sabattus, ME | 8 GWh | Sep 2023 | Dec 2025 | Solar |
| Shaker | Nautilus Solar Solutions | Gray, ME | 6 GWh | Jun 2022 | Dec 2025 | Solar |
| Quarry | Nautilus Solar Solutions | North Berwick, ME | 10 GWh | Nov 2022 | Dec 2025 | Solar |
| Pomham Islander (CSG) | Nautilus Solar Solutions | North Smithfield, RI | 1 GWh | Jun 2025 | Dec 2025 | Solar |
| Oakland | Nautilus Solar Solutions | Oakland, ME | 9 GWh | Aug 2022 | Dec 2025 | Solar |
| BNRG North Anson (CSG) | Nautilus Solar Solutions | North Anson, ME | 3 GWh | Oct 2024 | Dec 2025 | Solar |
| BNRG Norridgewock (CSG) | Nautilus Solar Solutions | Norridgewock, ME | 3 GWh | Oct 2024 | Dec 2025 | Solar |
| BRNG Nicolin (CSG) | Nautilus Solar Solutions | Ellsworth, ME | 6 GWh | Nov 2024 | Dec 2025 | Solar |
| BNRG Masardis (CSG) | Nautilus Solar Solutions | Masardis, ME | 4 GWh | Nov 2024 | Dec 2025 | Solar |
| Brewer (CSG) | Nautilus Solar Solutions | Brewer, ME | 7 GWh | Jul 2024 | Dec 2025 | Solar |
| TPE King Solar Holdings1, LLC (CSG) | Nautilus Solar Solutions | North Smithfield, RI | 18 GWh | Mar 2022 | Dec 2025 | Solar |
| Ryans Ranch | Nautilus Solar Solutions | Paris, ME | 5 GWh | May 2022 | Dec 2025 | Solar |
| Athens AT01 | Nautilus Solar Solutions | Athens, ME | 7 GWh | May 2022 | Dec 2025 | Solar |
| Dynamic - Leeds Solar (CSG) | Nautilus Solar Solutions | Leeds, ME | 9 GWh | Oct 2024 | Dec 2025 | Solar |
| Dynamic - Norridgewock Martin Stream (CSG) | Nautilus Solar Solutions | Norridgewock, ME | 9 GWh | Oct 2024 | Dec 2025 | Solar |
| Wells (ME) | Nautilus Solar Solutions | Wells, ME | 8 GWh | Jun 2022 | Dec 2025 | Solar |
| Washington WS01 | Nautilus Solar Solutions | Washington, ME | 5 GWh | May 2022 | Dec 2025 | Solar |
| Town House | Nautilus Solar Solutions | Chelsea, ME | 8 GWh | Nov 2022 | Dec 2025 | Solar |
| Standish | Nautilus Solar Solutions | Standish, ME | 7 GWh | Sep 2023 | Dec 2025 | Solar |
| Sidney | Nautilus Solar Solutions | Sidney, ME | 2 GWh | Apr 2023 | Dec 2025 | Solar |
| Farmingdale FA01 | Nautilus Solar Solutions | Farmingdale, ME | 8 GWh | May 2022 | Dec 2025 | Solar |
| Fryeburg | Nautilus Solar Solutions | Fryeburg, ME | 9 GWh | Apr 2023 | Dec 2025 | Solar |
| Mechanic Street (CSG) | Nautilus Solar Solutions | Presque Island, ME | 4 GWh | Nov 2024 | Dec 2025 | Solar |
| Missile Street (CSG) | Nautilus Solar Solutions | Presque Island, ME | 4 GWh | Nov 2024 | Dec 2025 | Solar |
| North Bridgton | Nautilus Solar Solutions | Oakland, ME | 8 GWh | Oct 2022 | Dec 2025 | Solar |
| ISM Solar Cranston CSG | Nautilus Solar Solutions | Cranston, RI | 4 GWh | Nov 2020 | Dec 2025 | Solar |
| Exeter Mail CSG | Nautilus Solar Solutions | Exeter, RI | 9 GWh | Dec 2024 | Dec 2025 | Solar |
| Exeter Ten (CSG) | Nautilus Solar Solutions | Exeter, RI | 5 GWh | Nov 2024 | Dec 2025 | Solar |
| Nautilus Goat Island Solar LLC (CSG) | Nautilus Solar Solutions | Burrillville, RI | 4 GWh | Jul 2019 | Dec 2025 | Solar |
| Hopkins Hill CSG | Nautilus Solar Solutions | West Greenwich, RI | 10 GWh | Oct 2020 | Dec 2025 | Solar |
| Mashpee Landfill Solar | Nautilus Solar Solutions | Mashpee, MA | 2 GWh | Aug 2014 | Dec 2025 | Solar |
| West Brookfield Solar - Gilbertsville Rd | Nautilus Solar Solutions | West Brookfield, MA | 5 GWh | May 2017 | Dec 2025 | Solar |
| Westport MA 2 Community Solar | Navisun LLC | Westport, MA | 2 GWh | Aug 2016 | Dec 2025 | Solar |
| Wareham MA 1 Community Solar | Navisun LLC | Wareham, MA | 3 GWh | Aug 2016 | Dec 2025 | Solar |
| Carver MA 1 Community Solar | Navisun LLC | Carver, MA | 3 GWh | Aug 2016 | Dec 2025 | Solar |
| Westport MA 1 Community Solar | Navisun LLC | Westport, MA | 2 GWh | Aug 2016 | Dec 2025 | Solar |
| Oak Leaf Solar XVII Community Solar | Navisun LLC | Pittsfield, MA | 47 MWh | Nov 2025 | Dec 2025 | Solar |
| ISM Solar Shepherd Acres | Navisun LLC | South Paris, ME | 4 GWh | Nov 2024 | Dec 2025 | Solar |
| Southwick Solar, LLC Community Solar | Navisun LLC | Southwick, MA | 4 GWh | Apr 2025 | Dec 2025 | Solar |
| BWC Jimmie Pond | Navisun LLC | Hampden, ME | 3 GWh | Nov 2024 | Dec 2025 | Solar |
| Oak Leaf Solar XVI Community Solar | Navisun LLC | Pittsfield, MA | 10 MWh | Nov 2025 | 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 |
| BWC Maces Pond LLC | Navisun LLC | Rockport, ME | 4 GWh | Nov 2021 | Dec 2025 | Solar |
| Freetown MA 1, LLC | Navisun LLC | Freetown, MA | 2 GWh | Nov 2022 | Dec 2025 | Solar |
| OSG Solar 1 LLC | Navisun LLC | Orange, MA | 3 GWh | Jun 2012 | Dec 2025 | Solar |
| Seaboard Charlton, LLC | Navisun LLC | Charlton, MA | 3 GWh | Nov 2020 | Dec 2025 | Solar |
| Seaboard Oxford, LLC | Navisun LLC | Oxford, MA | 3 GWh | Jul 2020 | Dec 2025 | Solar |
| Seaboard Sheffield, LLC | Navisun LLC | Sheffield, MA | 2 GWh | Mar 2021 | Dec 2025 | Solar |
| BWC Beech Ridge Brook, LLC | Navisun LLC | Scarborough, ME | 8 GWh | Apr 2023 | Dec 2025 | Solar |
| BWC Rams Horn Channel LLC | Navisun LLC | Beverly, MA | 6 GWh | Nov 2020 | Dec 2025 | Solar |
| Douglas Pike Solar, LLC | Navisun LLC | Burrillville, RI | 3 GWh | May 2023 | Dec 2025 | Solar |
| BWC Unity Pond LLC | Navisun LLC | Benton, ME | 7 GWh | Nov 2023 | Dec 2025 | Solar |
| Sheffield Hewins | Navisun LLC | Sheffield, MA | 2 GWh | Nov 2022 | Dec 2025 | Solar |
| Rumford Cogeneration | ND Paper, Inc. | Rumford, ME | 401 GWh | Dec 1989 | Jul 2026 | Black Liquor : 54.2% Tire-derived Fuels : 20.8% Wood/Wood Waste Solids : 16.7% Bituminous Coal : 6.0% Residual Fuel Oil : 1.1% Natural Gas : 0.6% Sludge Waste : 0.6% |
| NE Renewable Fitchburg, LLC | NE Renewable Fitchburg, LLC | Westminster, MA | 79 GWh | Jul 1992 | Dec 2025 | Wood/Wood Waste Solids : 98.7% Natural Gas : 1.3% |
| NE Renewable Springfield, LLC | NE Renewable Springfield, LLC | Springfield, NH | 73 GWh | Nov 1987 | Dec 2025 | Wood/Wood Waste Solids |
| NE Renewable Tamworth, LLC | NE Renewable Tamworth, LLC | Tamworth, NH | 78 GWh | Nov 1987 | Dec 2025 | Wood/Wood Waste Solids |
| NE Renewable Whitefield, LLC | NE Renewable Whitefield, LLC | Whitefield, NH | 59 GWh | Feb 1988 | Dec 2025 | Wood/Wood Waste Solids |
| CCSU Fuel Cell Project | New Britain Renewable Energy, LLC | New Britain, CT | 7 GWh | Mar 2012 | Dec 2025 | Natural Gas |
| China Mill Hydro | New Hampshire Hydro Associates | Allenstown, NH | 3 GWh | Jun 1981 | Dec 2025 | Water |
| Newton Rumford Landfill | Newton Municipal Solar LLC - Rumford | Newton, MA | 2 GWh | Jun 2017 | Dec 2025 | Solar |
| Nexamp Peak CSG | Nexamp Peak, LLC | Hancock, MA | 2 GWh | Nov 2015 | Dec 2025 | Solar |
| Upper Blackstone (MA) Treasure Valley | Nexamp Treasure Valley Solar, LLC | Rutland, MA | 6 GWh | Jun 2014 | Dec 2025 | Solar |
| Seabrook | NextEra Energy Seabrook LLC | Seabrook, NH | 10 TWh | Jul 1990 | Jul 2026 | Nuclear |
| Nashua Plant | NextEra Renewable Fuels, LLC | Nashua, NH | 13 GWh | Mar 1996 | Dec 2025 | Landfill Gas |
| Granite Reliable Power | NexteraEnergy | Dummer, NH | 199 GWh | Jan 2012 | Jul 2026 | Wind |
| Broadway Solar (CSG) | NextGrid Bitterbush, LLC | Bangor, ME | 6 GWh | Aug 2023 | Dec 2025 | Solar |
| Lisbon Street Solar | NextGrid Cliffrose, LLC | Lewiston, ME | 3 GWh | Mar 2022 | 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 |