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 |
|---|---|---|---|---|---|---|
| Town of Foxborough - Landfill (SREC II) | Town of Foxborough - Landfill (SREC II) | Foxborough, MA | 2 GWh | Jul 2017 | Dec 2025 | Solar |
| DG Tufts Knoll LLC CSG | DG Tufts Knoll, LLC | North Grafton, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Solten Plainville 6000, LLC | Altus Power America Management, LLC | Plainville, MA | 7 GWh | Jul 2017 | Dec 2025 | Solar |
| Dudley Solar CSG | Dudley Solar, LLC | Dudley, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Monson Solar, LLC | Monson Solar, LLC | Monson, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Dover (MA) | BWC Buckmaster Pond LLC | Dover, MA | 2 GWh | Jul 2017 | Dec 2025 | Solar |
| BJ's Wholesale Club, Inc- Uxbridge | Tesla Inc. | Uxbridge, MA | 270 MWh | Jun 2017 | Dec 2024 | Solar |
| Onondaga County- Clearwater | Tesla Inc. | Oswego, NY | 3 GWh | Jun 2017 | Dec 2025 | Solar |
| Cedarville CSG | Altus Power America Management, LLC | Plymouth, MA | 914 MWh | Jun 2017 | Dec 2025 | Solar |
| Orbit Energy RI | Anaergia | Johnston, RI | 144 MWh | Jun 2017 | Dec 2024 | Other Biomass Gas |
| Smith & Wesson at Springfield MA PV | Luminace Solar Massachusetts, LLC | Springfield, MA | 2 GWh | Jun 2017 | Dec 2025 | Solar |
| DG Crystal Spring CSG | DG Crystal Spring LLC | Mattapoisett, MA | 7 GWh | Jun 2017 | Dec 2025 | Solar |
| CED Chicopee Solar | RWE Clean Energy | Chicopee, MA | 5 GWh | Jun 2017 | Dec 2025 | Solar |
| DG Dighton LLC CSG | DG Dighton, LLC | Dighton, MA | 5 GWh | Jun 2017 | Dec 2025 | Solar |
| Newton Rumford Landfill | Newton Municipal Solar LLC - Rumford | Newton, MA | 2 GWh | Jun 2017 | Dec 2025 | Solar |
| Westport Community Solar Garden | BWC Bass River LLC | Westport, MA | 2 GWh | Jun 2017 | Dec 2025 | Solar |
| BWC Mystic River | BWC Mystic River LLC | Mendon, MA | 2 GWh | Jun 2017 | Dec 2025 | Solar |
| Hewlett-Packard (HP) - Andover, MA | Tesla Inc. | Andover, MA | 2 GWh | May 2017 | Dec 2025 | Solar |
| Town of Halfmoon | Tesla Inc. | Waterford, NY | 680 MWh | May 2017 | Dec 2025 | Solar |
| West Bridgewater AB CSG | MN8 Energy LLC | West Bridgewater, MA | 3 GWh | May 2017 | Dec 2025 | Solar |
| CMEEC - Navy NE Trident | Tesla Inc. | Groton, CT | 1 GWh | May 2017 | Dec 2025 | Solar |
| Renew Canal 1 CSG LLC | NRG Renew Canal 1 LLC | Sandwich, MA | 2 GWh | May 2017 | Dec 2025 | Solar |
| Iron Horse Solar 4, LLC | Iron Horse Solar 4, LLC | North Billerica, MA | 7 GWh | May 2017 | Dec 2025 | Solar |
| West Brookfield Solar - Gilbertsville Rd | Nautilus Solar Solutions | West Brookfield, MA | 5 GWh | May 2017 | Dec 2025 | Solar |
| Dynamic - Walpole | AES Distributed Energy | Walpole, MA | 2 GWh | May 2017 | Dec 2025 | Solar |
| Kenmare - Mansfield Branch Street | MN8 Energy LLC | Mansfield, MA | 2 GWh | May 2017 | Dec 2025 | Solar |
| Orange County Solar Farm (NY) | Tesla Inc. | Goshen, NY | 2 GWh | Apr 2017 | Dec 2025 | Solar |
| Fairhaven C CSG | MN8 Energy LLC | Fairhaven, MA | 2 GWh | Apr 2017 | Dec 2025 | Solar |
| Worcester Landfill | City of Worcester DPW - (MA) | Worcester, MA | 8 GWh | Apr 2017 | Dec 2025 | Solar |
| Shirley Landfill | Altus Power America Management, LLC | Shirley, MA | 1 GWh | Apr 2017 | Dec 2025 | Solar |
| Hampshire College Hybrid | Tesla Inc. | Amherst, MA | 3 GWh | Apr 2017 | Dec 2025 | Solar |
| Town of Lexington Solar | Syncarpha Lexington, LLC | Lexington, MA | 3 GWh | Apr 2017 | Dec 2025 | Solar |
| Hudson | Captona Hudson LLC | Hudson, MA | 5 GWh | Apr 2017 | Dec 2025 | Solar |
| Carver | Captona Carver LLC | North Carver, MA | 2 GWh | Apr 2017 | Dec 2025 | Solar |
| Bashaw Solar CSG 1, LLC | Bashaw Solar 1, LLC | Newbury, MA | 3 GWh | Mar 2017 | Dec 2025 | Solar |
| Boston Medical Center CHP Plant | Boston Medical Center | Boston, MA | 14 GWh | Mar 2017 | Dec 2025 | Natural Gas |
| Peterson Road Solar | Peterson Road Solar, LLC | Palmer, MA | 4 GWh | Mar 2017 | Dec 2025 | Solar |
| 301 Chestnut Solar NG | NuGen Capital Management | East Longmeadow, MA | 2 GWh | Mar 2017 | Dec 2025 | Solar |
| Falmouth Landfill Solar | Citizens Enterprises Corporation | Falmouth, MA | 5 GWh | Mar 2017 | Dec 2025 | Solar |
| Citizens Agawam Landfill Solar | Citizens Enterprises Corporation | Agawam, MA | 3 GWh | Mar 2017 | Dec 2025 | Solar |
| East Acres Solar NG, LLC | NuGen Capital Management | Pittsfield, MA | 5 GWh | Mar 2017 | Dec 2025 | Solar |
| Berkley | Captona Berkley LLC | Berkley, MA | 4 GWh | Mar 2017 | Dec 2025 | Solar |
| Chicopee | Captona Chicopee LLC | Chicopee, MA | 2 GWh | Mar 2017 | Dec 2025 | Solar |
| Bradford Solar | Bradford Solar, LLC | Haverhill, MA | 7 GWh | Mar 2017 | Dec 2025 | Solar |
| WED Coventry 5 | Greenbacker Renewable Energy Corporation | Coventry, RI | 3 GWh | Feb 2017 | Dec 2025 | Wind |
| Spring Street Solar 1 CSG | Spring Street Solar 1, LLC | Carver, MA | 3 GWh | Feb 2017 | Dec 2025 | Solar |
| Kearsarge Granby | Kearsarge Granby LLC | Granby, MA | 4 GWh | Feb 2017 | Dec 2025 | Solar |
| CMEEC - Rogers Rd Solar | Tesla Inc. | Norwich, CT | 2 GWh | Jan 2017 | Dec 2025 | Solar |
| DG Tufts Science LLC CSG | DG Tufts Science, LLC | North Grafton, MA | 1 GWh | Jan 2017 | Dec 2025 | Solar |
| Mt. Tom Solar Project Hybrid | Mt. Tom Solar, LLC | Holyoke, MA | 4 GWh | Dec 2016 | Dec 2025 | Solar |
| IOS - MEW Phase 1 | Madison Energy Holdings LLC | Madison, ME | 5 GWh | Dec 2016 | Dec 2025 | Solar |
| Norton Landfill Solar | Citizens Enterprises Corporation | Norton, MA | 2 GWh | Dec 2016 | Dec 2025 | Solar |
| Tyngsborough Solar | Citizens Enterprises Corporation | Tyngsborough, MA | 3 GWh | Dec 2016 | Dec 2025 | Solar |
| Kearsarge Concord II | Kearsarge Concord II LLC | Concord, MA | 7 GWh | Dec 2016 | Dec 2025 | Solar |
| Bingham Wind | Onward Energy | Bingham, ME | 475 GWh | Nov 2016 | Jul 2026 | Wind |
| Block Island Wind Farm | Deepwater Wind Block Island LLC | NA, RI | 81 GWh | Nov 2016 | Jul 2026 | Wind |
| Hancock Wind Plant | Onward Energy | T22 MD, ME | 115 GWh | Nov 2016 | Jul 2026 | Wind |
| Hunt Road Solar | Citizens Enterprises Corporation | Amesbury, MA | 7 GWh | Nov 2016 | Dec 2025 | Solar |
| Palmer Landfill | Syncarpha Bondsville, LLC | Palmer, MA | 6 GWh | Nov 2016 | Dec 2025 | Solar |
| CMEEC - Bozrah | Tesla Inc. | Bozrah, CT | 3 GWh | Nov 2016 | Dec 2025 | Solar |
| Conn Mun Electric Energy Coop | Tesla Inc. | Norwich, CT | 1 GWh | Nov 2016 | Dec 2025 | Solar |
| SJA Solar LLC-Solterra Monastery CSG | SJA Solar, LLC | Spencer, MA | 24 GWh | Nov 2016 | Dec 2025 | Solar |
| Pisgah Mountain Wind | Pisgah Mountain, LLC | Clifton, ME | 28 GWh | Nov 2016 | Dec 2025 | Wind |
| GMP Solar - Panton Hybrid | Green Mountain Power Corp | Panton, VT | 8 GWh | Nov 2016 | Jul 2026 | Solar |
| UI RCP Woodbridge FC | United Illuminating Co | Woodbridge, CT | 17 GWh | Nov 2016 | Dec 2025 | Natural Gas |
| CMEEC - Norwich Stott St Solar Hybrid | Tesla Inc. | Norwich, CT | 4 GWh | Nov 2016 | Dec 2025 | Solar |
| Meadow Solar | Altus Power America Management, LLC | Boston, MA | 4 GWh | Nov 2016 | Dec 2025 | Solar |
| Iron Horse Solar I CSG | Iron Horse Solar 1, LLC | North Billerica, MA | 4 GWh | Nov 2016 | Dec 2025 | Solar |
| VEC Alburgh Array | SoCore Energy LLC | Alburgh, VT | 1 GWh | Nov 2016 | Dec 2025 | Solar |
| GMP Solar - Hartford | Green Mountain Power Corp | Hartford, VT | 7 GWh | Nov 2016 | Jul 2026 | Solar |
| GMP Solar - Williamstown | Green Mountain Power Corp | Williamstown, VT | 7 GWh | Nov 2016 | Jul 2026 | Solar |
| Cold River Road Solar | Onsite Partners, LLC | North Clarendon, VT | 3 GWh | Nov 2016 | Dec 2025 | Solar |
| AIS Solar Project | Terraform Arcadia | Leominster, MA | 3 GWh | Nov 2016 | Dec 2025 | Solar |
| Kearsarge Bellingham PV | Kearsarge Bellingham LLC | Bellingham, MA | 5 GWh | Nov 2016 | Dec 2025 | Solar |
| Canis Major Solar Farm | LSE Canis Major LLC | Suffield, CT | 3 GWh | Nov 2016 | Dec 2025 | Solar |
| Canis Minor Solar Farm | LSE Canis Minor LLC | Barkhamsted, CT | 2 GWh | Nov 2016 | Dec 2025 | Solar |
| West Boylston Community Shared Solar | Town of West Boylston - (MA) | West Boylston, MA | 447 MWh | Nov 2016 | Dec 2025 | Solar |
| Syncarpha Still River, LLC CSG | Syncarpha Still River, LLC | Bolton, MA | 4 GWh | Nov 2016 | Dec 2025 | Solar |
| Hadley 2 Solar, LLC CSG | Hadley 2 Solar, LLC | Hadley, MA | 3 GWh | Nov 2016 | Dec 2025 | Solar |
| Westminster | MN8 Energy LLC | Westminster, VT | 2 GWh | Nov 2016 | Dec 2025 | Solar |
| Cranberry Solar | GWE Cranberry Solar RT, LLC | Middleborough, MA | 2 GWh | Nov 2016 | Dec 2025 | Solar |
| GMP Solar - Williston | Green Mountain Power Corp | Williston, VT | 6 GWh | Oct 2016 | Jul 2026 | Solar |
| Sutton Solar CSG | Sutton Solar, LLC | Sutton, MA | 3 GWh | Oct 2016 | Dec 2025 | Solar |
| Syncarpha Freetown | Marie's Way Solar I, LLC | Freetown, MA | 6 GWh | Oct 2016 | Dec 2025 | Solar |
| Barrett PV | MN8 Energy LLC | Oxford, MA | 17 GWh | Oct 2016 | Dec 2025 | Solar |
| Centaurus Solar - MA | LSE Centaurus LLC | Ashland, MA | 3 GWh | Oct 2016 | Dec 2025 | Solar |
| WED Coventry 1 | WED Coventry One, LLC | Coventry, RI | 3 GWh | Sep 2016 | Dec 2025 | Wind |
| Pfizer Groton Fuel Cell | Groton Fuel Cell 1 LLC | Groton, CT | 36 GWh | Sep 2016 | Dec 2025 | Natural Gas |
| Athens Energy | Athens Energy, LLC | Athens, ME | 56 GWh | Sep 2016 | Dec 2025 | Wood/Wood Waste Solids |
| GMP Solar - Richmond | Green Mountain Power Corp | Richmond, VT | 3 GWh | Sep 2016 | Jul 2026 | Solar |
| Curtis Hill Solar CSG | CCC Solar Holdings LLC | Charlton, MA | 3 GWh | Sep 2016 | Dec 2025 | Solar |
| Depot Hill Solar CSG | CCC Solar Holdings LLC | Charlton, MA | 3 GWh | Sep 2016 | Dec 2025 | Solar |
| Grafton PV | MN8 Energy LLC | Grafton, MA | 4 GWh | Sep 2016 | Dec 2025 | Solar |
| UMASS | RWE Clean Energy | Amherst, MA | 5 GWh | Sep 2016 | Dec 2025 | Solar |
| Carver MA 1 Community Solar | Navisun LLC | Carver, MA | 3 GWh | Aug 2016 | Dec 2025 | Solar |
| Wareham MA 1 Community Solar | Navisun LLC | Wareham, MA | 3 GWh | Aug 2016 | Dec 2025 | Solar |
| Westport MA 1 Community Solar | Navisun LLC | Westport, MA | 2 GWh | Aug 2016 | Dec 2025 | Solar |
| Westport MA 2 Community Solar | Navisun LLC | Westport, MA | 2 GWh | Aug 2016 | Dec 2025 | Solar |
| WED Coventry 2 | WED Coventry Two, LLC | Coventry, RI | 9 GWh | Jul 2016 | Jun 2026 | Wind |
| WED Coventry 3 | WED Coventry Three, LLC | Coventry, RI | 3 GWh | Jul 2016 | Dec 2025 | Wind |
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 |