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 |
|---|---|---|---|---|---|---|
| Cottage Street Solar Facility | Western Massachusetts Electric Company | Springfield, MA | 4 GWh | Apr 2014 | May 2026 | Solar |
| Tihonet Solar | RWE Clean Energy | Wareham, MA | 2 GWh | Apr 2014 | Dec 2025 | Solar |
| Gardner Solar 1 | Gardner Solar 1, LLC | Gardner, MA | 3 GWh | Apr 2014 | Dec 2025 | Solar |
| Beverly | Integrys MA Solar, LLC | Beverly, MA | 3 GWh | Apr 2014 | Dec 2025 | Solar |
| Stetson Road Solar - Barre I | Kearsarge Solar LLC | Barre, MA | 2 GWh | Apr 2014 | Dec 2025 | Solar |
| Millbury Solar | Evergreen Wind, LLC | Millbury, MA | 5 GWh | Mar 2014 | Dec 2025 | Solar |
| Dartmouth | Mass Solar, LLC | Dartmouth, MA | 6 GWh | Mar 2014 | Dec 2025 | Solar |
| Walpole Solar 2 | Walpole Solar 2, LLC | Walpole, MA | 4 GWh | Mar 2014 | Dec 2025 | Solar |
| Browne Solar LLC | CVI CleanCapital Solar 1 LLC | Palmer, MA | 1 GWh | Mar 2014 | Dec 2025 | Solar |
| Indian Hill Solar LLC | CVI CleanCapital Solar 1 LLC | Palmer, MA | 1 GWh | Mar 2014 | Dec 2025 | Solar |
| State Street Solar LLC | CVI CleanCapital Solar 1 LLC | Palmer, MA | 1 GWh | Mar 2014 | Dec 2025 | Solar |
| Westborough Solar LLC | SunRay Power LLC | Westborough, MA | 2 GWh | Mar 2014 | Dec 2024 | Solar |
| Winchendon Solar | Altus Power America Management, LLC | Winchendon, MA | 3 GWh | Mar 2014 | Dec 2025 | Solar |
| Barre II Solar Project | Kearsarge Solar LLC | Barre, MA | 2 GWh | Mar 2014 | Dec 2025 | Solar |
| Concord Solar Farm | Kearsarge Solar LLC | Concord, MA | 2 GWh | Mar 2014 | Dec 2025 | Solar |
| Little Bay | Altus Power America Management, LLC | Providence, RI | 1 GWh | Feb 2014 | Dec 2025 | Solar |
| Maynard PV | Terraform Arcadia | Maynard, MA | 1 GWh | Dec 2013 | Dec 2025 | Solar |
| Southbridge PV | Terraform Arcadia | Southbridge, MA | 4 GWh | Dec 2013 | Dec 2025 | Solar |
| Cape Cod Air Force Station - 6 SWS | US Space Force | Sagamore, MA | 6 GWh | Dec 2013 | May 2026 | Wind |
| Danton XI Solar LLC | Danton XI Solar LLC | Methuen, MA | 2 GWh | Dec 2013 | Dec 2025 | Solar |
| Erving Paper Mills | Erving Paper Mills Inc | Erving, MA | 42 GWh | Nov 2013 | May 2026 | Natural Gas : 98.0% Distillate Fuel Oil : 2.0% |
| 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% |
| Quittacas Pond Solar | RWE Clean Energy | Rochester, MA | 5 GWh | Nov 2013 | Dec 2025 | Solar |
| Marshfield PV | Terraform Arcadia | Marshfield, MA | 5 GWh | Nov 2013 | Dec 2025 | Solar |
| Bridgeport Fuel Cell, LLC | Bridgeport Fuel Cell, LLC | Bridgeport, CT | 90 GWh | Nov 2013 | Dec 2025 | Natural Gas |
| Somers Solar Center, LLC | Onward Energy | Somers, CT | 9 GWh | Nov 2013 | Dec 2025 | Solar |
| Merrimac Solar | RWE Clean Energy | Merrimac, MA | 2 GWh | Nov 2013 | Dec 2025 | Solar |
| Forbes Street Solar | Altus Power America Management, LLC | East Providence, RI | 4 GWh | Nov 2013 | Dec 2025 | Solar |
| Sudbury Landfill | Heliovaas LLC | Sudbury, MA | 1 GWh | Nov 2013 | Dec 2025 | Solar |
| Integrys MA Solar, LLC - Ashburnham Site | Integrys MA Solar, LLC | Ashburnham, MA | 3 GWh | Nov 2013 | Dec 2025 | Solar |
| Bolton PV | AES Distributed Energy | Bolton, MA | 6 GWh | Nov 2013 | Dec 2025 | Solar |
| Stow PV | AES Distributed Energy | Stow, MA | 3 GWh | Nov 2013 | Dec 2025 | Solar |
| Rehoboth Solar | Citizens Enterprises Corporation | Rehoboth, MA | 3 GWh | Nov 2013 | Dec 2025 | Solar |
| Chicopee Solar | Citizens Enterprises Corporation | Chicopee, MA | 4 GWh | Nov 2013 | Dec 2025 | Solar |
| West Davisville Solar | Altus Power America Management, LLC | North Kingstown, RI | 3 GWh | Nov 2013 | Dec 2025 | Solar |
| Rockland Solar CSG | MN8 Energy LLC | Rockland, MA | 2 GWh | Nov 2013 | Dec 2025 | Solar |
| Franklin 2 | CD US Solar MT 2 LLC | Franklin, MA | 6 GWh | Nov 2013 | Dec 2025 | Solar |
| St. Albans SPEED Project | St. Albans Solar Partners, LLC | St. Albans, VT | 2 GWh | Nov 2013 | Dec 2024 | Solar |
| KS Solar Six LLC | Kearsarge Solar LLC | Hubbardston, MA | 3 GWh | Nov 2013 | Dec 2025 | Solar |
| Acton Solar Landfill | Heliovaas LLC | Acton, MA | 475 MWh | Nov 2013 | Dec 2025 | Solar |
| Leominster (MA)-South Street-R&D | South Street Solar, LLC | Tewksbury, MA | 3 GWh | Nov 2013 | Dec 2025 | Solar |
| Lowell Solar Landfill | Heliovaas LLC | Lowell, MA | 1 GWh | Nov 2013 | Dec 2025 | Solar |
| Limerick Road Solar Farm | Limerick Road Solar, LLC | Shelburne, VT | 3 GWh | Nov 2013 | Dec 2025 | Solar |
| Morin Solar 2013 LLC | CVI CleanCapital Solar 6 | Warren, MA | 5 GWh | Nov 2013 | Dec 2025 | Solar |
| Brookfield Solar 2013 LLC | CVI CleanCapital Solar 6 | North Brookfield, MA | 3 GWh | Nov 2013 | Dec 2025 | Solar |
| Ravenbrook | Captona Ravenbrook LLC | Carver, MA | 6 GWh | Nov 2013 | Dec 2025 | Solar |
| Burgess BioPower | Berlin Station, LLC | Berlin, NH | 390 GWh | Oct 2013 | Dec 2025 | Wood/Wood Waste Solids |
| Dept of Corrections NCCI Wind | Dept of Corrections NCCI Wind | Gardner, MA | 2 GWh | Oct 2013 | May 2026 | Wind |
| Franklin 1 | CD US Solar MT 2 LLC | Wrentham, MA | 4 GWh | Oct 2013 | Dec 2025 | Solar |
| Brockelman | Integrys MA Solar, LLC | Lancaster, MA | 5 GWh | Oct 2013 | Dec 2025 | Solar |
| Orono B | Brookfield Black Bear Hydro, LLC | Orono, ME | 17 GWh | Oct 2013 | Dec 2025 | Water |
| Bellingham PV | Terraform Arcadia | Douglas, MA | 4 GWh | Sep 2013 | Dec 2025 | Solar |
| Scituate PV | AES Distributed Energy | Scituate, MA | 3 GWh | Sep 2013 | Dec 2025 | Solar |
| Easton Landfill | CleanCapital Holdings | Easton, MA | 3 GWh | Sep 2013 | Dec 2025 | Solar |
| Plymouth Site 1 | CleanCapital Holdings | Plympton, MA | 7 GWh | Sep 2013 | Dec 2025 | Solar |
| Grafton Solar | CD US Solar MT 2 LLC | Grafton, MA | 2 GWh | Sep 2013 | Dec 2025 | Solar |
| Adams Farm Solar | Altus Power America Management, LLC | Athol, MA | 4 GWh | Sep 2013 | Dec 2025 | Solar |
| Nextsun Energy Littleton | Greenbacker Renewable Energy Corporation | Littleton, MA | 5 GWh | Sep 2013 | Dec 2025 | Solar |
| Sheldon Solar | Excelsior Energy Capital | Sheldon Springs, VT | 2 GWh | Aug 2013 | Dec 2025 | Solar |
| Open View Solar Farm | Cross Pollination Inc | New Haven, VT | 3 GWh | Aug 2013 | Dec 2025 | Solar |
| Stillwater B | Brookfield Black Bear Hydro, LLC | Old Town, ME | 9 GWh | Aug 2013 | Dec 2025 | Water |
| Hunt Farm Solar | Altus Power America Management, LLC | Orange, MA | 3 GWh | Aug 2013 | Dec 2025 | Solar |
| WYM 1250 Palmer LLC | CVI CleanCapital Solar 6 | Palmer, MA | 1 GWh | Aug 2013 | Dec 2025 | Solar |
| Northbridge Solar | RWE Clean Energy | South Grafton, MA | 3 GWh | Jul 2013 | Dec 2025 | Solar |
| Ludlow Landfill | CleanCapital Holdings | Ludlow, MA | 3 GWh | Jul 2013 | Dec 2025 | Solar |
| Orange PV | Terraform Arcadia | Orange, MA | 3 GWh | Jun 2013 | Dec 2025 | Solar |
| Berkley East Solar LLC | SunEdison LLC | Berkley, MA | 5 GWh | Jun 2013 | Dec 2025 | Solar |
| Methuen Landfill | CleanCapital Holdings | Methuen, MA | 2 GWh | Jun 2013 | Dec 2025 | Solar |
| Wilson Solar (MA) | RWE Clean Energy | Spencer, MA | 870 MWh | May 2013 | Dec 2025 | Solar |
| Town of East Bridgewater CSG | Tesla Inc. | East Bridgewater, MA | 1 GWh | May 2013 | Dec 2025 | Solar |
| West Greenwich Solar | RWE Clean Energy | West Greenwich, RI | 2 GWh | Apr 2013 | May 2026 | Solar |
| Johnston LFG Turbine Plant | Rhode Island LFG Genco | Johnston, RI | 173 GWh | Apr 2013 | May 2026 | Landfill Gas |
| Route 57 Solar | Citizens Enterprises Corporation | Agawam, MA | 2 GWh | Feb 2013 | Dec 2025 | Solar |
| Whately Solar | Citizens Enterprises Corporation | Whately, MA | 2 GWh | Feb 2013 | Dec 2025 | Solar |
| Acushnet- High Hill | CleanCapital Holdings | Dartmouth, MA | 3 GWh | Feb 2013 | Dec 2025 | Solar |
| CES Sterling LLC | SunEdison LLC | Sterling, MA | 3 GWh | Jan 2013 | Dec 2025 | Solar |
| Dartmouth Landfill | CleanCapital Holdings | Dartmouth, MA | 2 GWh | Jan 2013 | Dec 2025 | Solar |
| Fall River Solar CSG | MN8 Energy LLC | Fall River, MA | 2 GWh | Jan 2013 | Dec 2025 | Solar |
| Clark University | Clark University | Worcester, MA | 4 GWh | Dec 2012 | Dec 2025 | Natural Gas |
| EBZ Solar | Citizens Enterprises Corporation | Shirley, MA | 3 GWh | Dec 2012 | Dec 2025 | Solar |
| Acushnet-Braley Road 1 | CleanCapital Holdings | Freetown, MA | 3 GWh | Dec 2012 | Dec 2025 | Solar |
| New England Wind LLC | Avangrid Power LLC | Florida, MA | 73 GWh | Nov 2012 | May 2026 | Wind |
| Douglas Solar | RWE Clean Energy | Douglas, MA | 3 GWh | Nov 2012 | Dec 2025 | Solar |
| Groveland Solar | RWE Clean Energy | Groveland, MA | 4 GWh | Nov 2012 | Dec 2025 | Solar |
| Boston Scientific Solar | RWE Clean Energy | Quincy, MA | 1 GWh | Nov 2012 | Dec 2025 | Solar |
| Padelford Solar | RWE Clean Energy | Berkley, MA | 4 GWh | Nov 2012 | Dec 2025 | Solar |
| Groton Wind LLC | Avangrid Power LLC | Groton, NH | 101 GWh | Nov 2012 | May 2026 | Wind |
| SVEP Solar Project Company | CVI CleanCapital Solar 1 LLC | Pownal, VT | 2 GWh | Nov 2012 | Dec 2025 | Solar |
| Williamstown Solar | CVI CleanCapital Solar 1 LLC | Williamstown, VT | 2 GWh | Nov 2012 | Dec 2025 | Solar |
| Georgia Mountain Community Wind Farm | Greenbacker Renewable Energy Corporation | Milton, VT | 25 GWh | Nov 2012 | May 2026 | Wind |
| Manheim New England | Cox Enterprises | North Dighton, MA | 2 GWh | Nov 2012 | Dec 2025 | Solar |
| Kingdom Community Wind | Green Mountain Power Corp | Lowell, VT | 164 GWh | Oct 2012 | May 2026 | Wind |
| Bull Hill Wind Project | Evergreen Wind, LLC | Eastbrook, ME | 66 GWh | Sep 2012 | Dec 2025 | Wind |
| Shrewsbury Solar | RWE Clean Energy | Shrewsbury, MA | 4 GWh | Sep 2012 | Dec 2025 | Solar |
| Camelot Wind LLC | Camelot Wind LLC | Plymouth, MA | 2 GWh | Sep 2012 | Dec 2024 | Wind |
| NBC Field's Point Wind Farm | Narragansett Bay Commission | Providence, RI | 7 GWh | Sep 2012 | May 2026 | Wind |
| SunGen Sharon 1 LLC | SunGen Sharon 1 LLC | Sharon, VT | 2 GWh | Jul 2012 | Dec 2025 | Solar |
| True North | CD US Solar MT1 LLC | Salisbury, MA | 6 GWh | Jul 2012 | Dec 2025 | Solar |
| Canton | Captona Canton LLC | Canton, MA | 6 GWh | Jul 2012 | Dec 2025 | Solar |
| Acushnet AD Makepeace | CleanCapital Holdings | Wareham, MA | 6 GWh | Jun 2012 | Dec 2025 | 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 |