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 |
|---|---|---|---|---|---|---|
| Oxford | CVI CleanCapital Solar 6 | Oxford, MA | 3 GWh | Jun 2014 | Dec 2025 | Solar |
| Stone Hill Solar CSG | MN8 Energy LLC | North Easton, MA | 2 GWh | Jun 2014 | Dec 2025 | Solar |
| North Brookfield | Mass Solar, LLC | North Brookfield, MA | 4 GWh | May 2014 | Dec 2025 | Solar |
| Fairview Farms Solar | NuGen Capital Management | Whately, MA | 3 GWh | May 2014 | Dec 2025 | Solar |
| 651 Chase Solar NG | NuGen Capital Management | Lunenburg, MA | 4 GWh | May 2014 | Dec 2025 | Solar |
| Katama Farm | Clean Focus Yield, LLC | Edgartown, MA | 2 GWh | May 2014 | Dec 2025 | Solar |
| Nunnepog | Clean Focus Yield, LLC | Edgartown, MA | 2 GWh | May 2014 | Dec 2025 | Solar |
| Lepomis PV Energy LLC | CleanCapital Holdings | Plymouth, MA | 8 GWh | May 2014 | Dec 2025 | Solar |
| Devens | Altus Power America Management, LLC | Shirley, MA | 5 GWh | May 2014 | Dec 2025 | Solar |
| Ayers Village Solar | Altus Power America Management, LLC | Methuen, MA | 3 GWh | May 2014 | Dec 2025 | Solar |
| Antares-GRE 314 East Lyme LLC | MN8 Energy LLC | East Lyme, CT | 4 GWh | May 2014 | Jul 2026 | Solar |
| Chester Solar Farm | Kearsarge Solar LLC | Chester, MA | 6 GWh | May 2014 | Dec 2025 | Solar |
| 205 Sturbridge A | Altus Power America Management, LLC | Brimfield, MA | 4 GWh | May 2014 | Dec 2025 | Solar |
| 201 Sturbridge B | Altus Power America Management, LLC | Brimfield, MA | 2 GWh | May 2014 | Dec 2025 | Solar |
| Southern Sky Renew Energy Berkley LLC | Southern Sky Renewable Energy Berkley, LLC | Berkley, MA | 4 GWh | May 2014 | Dec 2025 | Solar |
| Hartford Landfill Solar EGF | Materials Innovation Recycling Authority | Hartford, CT | 1 GWh | May 2014 | Dec 2024 | Solar |
| Green Meadows | Altus Power America Management, LLC | Sandwich, MA | 5 GWh | Apr 2014 | Dec 2025 | Solar |
| Mass Midstate Solar 3 | Evergreen Wind, LLC | Warren, MA | 6 GWh | Apr 2014 | Dec 2025 | Solar |
| Mass Midstate Solar 2 | Evergreen Wind, LLC | Warren, MA | 7 GWh | Apr 2014 | Dec 2025 | Solar |
| Mass Midstate Solar 1 | Evergreen Wind, LLC | Warren, MA | 7 GWh | Apr 2014 | Dec 2025 | Solar |
| Cottage Street Solar Facility | Western Massachusetts Electric Company | Springfield, MA | 4 GWh | Apr 2014 | Jul 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 2025 | 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 | Jul 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 | Jul 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 2025 | 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 | Jul 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 | Jul 2026 | Solar |
| Johnston LFG Turbine Plant | Rhode Island LFG Genco | Johnston, RI | 170 GWh | Apr 2013 | Jul 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 |
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 |