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 |
|---|---|---|---|---|---|---|
| East Windsor Solar One | DG Connecticut III, LLC | East Windsor, CT | 6 GWh | Nov 2021 | Sep 2025 | Solar |
| Lilly Lane | LSE Chamaeleon LLC | Charlton, MA | 2 GWh | May 2018 | Oct 2025 | Solar |
| 1 Commercial | Madison Energy Investments LLC | Sharon, MA | 622 MWh | Aug 2023 | Oct 2025 | Solar |
| Lochmere Hydroelectric Plant | Eagle Creek Renewable Energy, LLC | Tilton, NH | 2 GWh | Nov 1984 | Oct 2025 | Water |
| Goodwin Hydroelectric | Metropolitan Dist of Hartford | W. Hartland, CT | 8 GWh | Mar 1986 | Oct 2025 | Water |
| Clement Dam Hydro LLC | Eagle Creek Renewable Energy, LLC | Tilton, NH | 7 GWh | Nov 1984 | Oct 2025 | Water |
| W K Sanders | Village of Morrisville - (VT) | Hyde Park, VT | 716 MWh | Jun 1983 | Nov 2025 | Water |
| Brookside | Terraform Arcadia | North Smithfield, RI | 969 MWh | Oct 2015 | Nov 2025 | Solar |
| Future Generation Wind | RWE Clean Energy | Plymouth, MA | 12 GWh | Jul 2016 | Nov 2025 | Wind |
| Hydro Kennebec Project | Hydro Kennebec LLC | Winslow, ME | 37 GWh | Dec 1988 | Nov 2025 | Water |
| Old Wardour Solar | NuGen Capital Management | East Brookfield, MA | 7 GWh | Dec 2015 | Dec 2025 | Solar |
| Kearsarge Uxbridge | Kearsarge Uxbridge LLC | Uxbridge, MA | 3 GWh | Aug 2018 | Dec 2025 | Solar |
| Kearsarge SKSC1 LLC | Kearsarge SKSC1 LLC | South Kingstown, RI | 5 GWh | Sep 2018 | Dec 2025 | Solar |
| Kearsarge GB | Kearsarge GB LLC | Great Barrington, MA | 3 GWh | Jul 2018 | Dec 2025 | Solar |
| Westminster | MN8 Energy LLC | Westminster, VT | 2 GWh | Nov 2016 | Dec 2025 | Solar |
| BWC Pocasset River | BWC Pocasset River, LLC | Wareham, MA | 2 GWh | Nov 2018 | Dec 2025 | Solar |
| BWC Harlow Brook | BWC Harlow Brook, LLC | Wareham, MA | 2 GWh | Nov 2018 | Dec 2025 | Solar |
| BWC Wareham River | BWC Wareham River, LLC | Wareham, MA | 2 GWh | Nov 2018 | Dec 2025 | Solar |
| BWC Gibbs Brook | BWC Gibbs Brook, LLC | Wareham, MA | 7 GWh | Nov 2018 | Dec 2025 | Solar |
| BWC Origination 18 | BWC Origination 18, LLC | Mattapoisett, MA | 7 GWh | Nov 2018 | Dec 2025 | Solar |
| Barre Solar III LLC | AES Distributed Energy | Barre, MA | 1 GWh | Feb 2018 | Dec 2025 | Solar |
| Dynamic - Walpole | AES Distributed Energy | Walpole, MA | 2 GWh | May 2017 | Dec 2025 | Solar |
| North Stonington Solar Center, LLC | Adapture Renewables, Inc. | North Stonington, CT | 32 GWh | Sep 2022 | Dec 2025 | Solar |
| Plymouth Solar | NSTAR Electric Company | Plymouth, MA | 2 GWh | May 2018 | Dec 2025 | Solar |
| Lee Site 31 Solar | NSTAR Electric Company | Lee, MA | 149 MWh | Jul 2018 | Dec 2025 | Solar |
| Pittsfield 44 - M&W PV | NSTAR Electric Company | Pittsfield, MA | 2 GWh | Jul 2018 | Dec 2025 | Solar |
| Westminster Renewables, LLC CSG | Westminster Renewables, LLC | Westminster, MA | 2 GWh | Sep 2018 | Dec 2025 | Solar |
| Monson Solar, LLC | Monson Solar, LLC | Monson, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Williamsburg | AES Distributed Energy | Goshen, MA | 6 GWh | Jun 2019 | Dec 2025 | Solar |
| Dudley Solar CSG | Dudley Solar, LLC | Dudley, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Ashby Solar, LLC CSG | Ashby Solar, LLC | Fitchburg, MA | 3 GWh | Jun 2018 | Dec 2025 | Solar |
| Griffin Road Solar, LLC CSG | Griffin Road Solar, LLC | Charlton, MA | 3 GWh | Feb 2018 | Dec 2025 | Solar |
| East Bridgewater Solar | Altus Power America Management, LLC | East Bridgewater, MA | 3 GWh | Oct 2017 | Dec 2025 | Solar |
| Hadley 2 Solar, LLC CSG | Hadley 2 Solar, LLC | Hadley, MA | 3 GWh | Nov 2016 | Dec 2025 | Solar |
| Palmer | AES Distributed Energy | Palmer, MA | 6 GWh | Sep 2019 | Dec 2025 | Solar |
| WED GW Solar, LLC | CleanCapital Holdings | Lincoln, RI | 4 GWh | Dec 2018 | Dec 2025 | Solar |
| WED Shun III, LLC | WED Shun III, LLC | Johnston, RI | 8 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Shun II, LLC | WED Shun II, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Plainfield, LLC | WED Plainfield, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Plainfield III, LLC | WED Plainfield III, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Plainfield II, LLC | WED Plainfield II, LLC | Johnston, RI | 8 GWh | Dec 2018 | Dec 2025 | Wind |
| Ludlow Site 72 - Conti | NSTAR Electric Company | Ludlow, MA | 3 GWh | Jul 2018 | Dec 2025 | Solar |
| East Springfield Solar PV | NSTAR Electric Company | Springfield, MA | 2 GWh | Sep 2018 | Dec 2025 | Solar |
| Hatfield Solar PV | NSTAR Electric Company | Hatfield, MA | 5 GWh | Nov 2018 | Dec 2025 | Solar |
| Sunderland Solar PV | NSTAR Electric Company | Sunderland, MA | 2 GWh | Aug 2018 | Dec 2025 | Solar |
| Town of Branford | Tesla Inc. | Branford, CT | 2 GWh | May 2018 | Dec 2025 | Solar |
| Hampden Solar PV | NSTAR Electric Company | Hampden, MA | 6 GWh | Oct 2019 | Dec 2025 | Solar |
| Springfield Solar PV | NSTAR Electric Company | Springfield, MA | 6 GWh | Dec 2018 | Dec 2025 | Solar |
| Southampton Solar PV | NSTAR Electric Company | Southampton, MA | 3 GWh | Jan 2019 | Dec 2025 | Solar |
| Savoy Solar PV | NSTAR Electric Company | Savoy, MA | 3 GWh | Jan 2019 | Dec 2025 | Solar |
| Hinsdale Solar PV | NSTAR Electric Company | Hinsdale, MA | 3 GWh | Dec 2018 | Dec 2025 | Solar |
| Greenfield Solar PV | NSTAR Electric Company | Greenfield, MA | 3 GWh | Dec 2018 | Dec 2025 | Solar |
| East Longmeadow Solar PV | NSTAR Electric Company | East Longmeadow, MA | 8 GWh | Sep 2019 | Dec 2025 | Solar |
| Wareham Solar PV | NSTAR Electric Company | Wareham, MA | 1 GWh | Nov 2018 | Dec 2025 | Solar |
| Adams Solar | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Hamilton Solar | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Jefferson Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Dec 2017 | Dec 2025 | Solar |
| Wilson Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Franklin Solar (CT) | Ecos Energy LLC | Lebanon, CT | 2 GWh | Feb 2018 | Dec 2025 | Solar |
| Saint Albans Solar | Cypress Creek Renewables | Georgia, VT | 7 GWh | Sep 2018 | Dec 2025 | Solar |
| Toray Plastic America's CHP Plant | Toray Plastics America | North Kingstown, RI | 157 GWh | Dec 2002 | Dec 2025 | Natural Gas |
| Hope Farm Solar, LLC | Adapture Renewables, Inc. | Cranston, RI | 16 GWh | Aug 2019 | Dec 2025 | Solar |
| IKEA New Haven Rooftop PV & Fuel Cell | IKEA Property Inc | New Haven, CT | 3 GWh | Jun 2012 | Dec 2025 | Natural Gas : 71.5% Solar : 28.5% |
| Kearsarge Granby | Kearsarge Granby LLC | Granby, MA | 4 GWh | Feb 2017 | Dec 2025 | Solar |
| Kearsarge Concord II | Kearsarge Concord II LLC | Concord, MA | 7 GWh | Dec 2016 | Dec 2025 | Solar |
| Syncarpha Still River, LLC CSG | Syncarpha Still River, LLC | Bolton, MA | 4 GWh | Nov 2016 | Dec 2025 | Solar |
| Syncarpha Hancock III CSG | Syncarpha Hancock III, LLC | Pittsfield, MA | 1 GWh | Oct 2017 | Dec 2025 | Solar |
| Syncarpha Hancock II CSG | Syncarpha Hancock II, LLC | Hancock, MA | 3 GWh | Oct 2017 | Dec 2025 | Solar |
| Syncarpha Hancock I CSG | Syncarpha Hancock I, LLC | Hancock, MA | 3 GWh | Oct 2017 | Dec 2025 | Solar |
| East Acres Solar NG, LLC | NuGen Capital Management | Pittsfield, MA | 5 GWh | Mar 2017 | Dec 2025 | Solar |
| Randolph | Altus Power America Management, LLC | Randolph, MA | 6 GWh | Oct 2017 | Dec 2025 | Solar |
| Solten Plainville 6000, LLC | Altus Power America Management, LLC | Plainville, MA | 7 GWh | Jul 2017 | Dec 2025 | Solar |
| MA Solar Storage 1 Hybrid | Origis Energy USA, Inc | Sterling, MA | 1 GWh | Feb 2018 | Dec 2025 | Solar |
| Onyx - Brockton Thatcher Landfill Solar | Onyx Asset Services Group | Brockton, MA | 5 GWh | Oct 2017 | Dec 2025 | Solar |
| Onyx - Pembroke Landfill Solar | Onyx Asset Services Group | Pembroke, MA | 3 GWh | Nov 2017 | Dec 2025 | Solar |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | 65 GWh | May 2010 | Dec 2025 | Natural Gas : 99.9% |
| Greater New Bedford LFG Utiliz. Facility | CommonWealth New Bedford Energy LLC | New Bedford, MA | 13 GWh | Sep 2005 | Dec 2025 | Landfill Gas |
| Texon Hydroelectric Project | Hitchcock Hydro, LLC | Russell, MA | 4 GWh | Dec 1981 | Dec 2025 | Water |
| DG Webster LLC CSG | DG Webster, LLC | Webster, MA | 2 GWh | Nov 2017 | Dec 2025 | Solar |
| DG Tufts Knoll LLC CSG | DG Tufts Knoll, LLC | North Grafton, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| DG Dighton LLC CSG | DG Dighton, LLC | Dighton, MA | 5 GWh | Jun 2017 | Dec 2025 | Solar |
| DG Tufts Science LLC CSG | DG Tufts Science, LLC | North Grafton, MA | 1 GWh | Jan 2017 | Dec 2025 | Solar |
| West Brookfield Solar - Gilbertsville Rd | Nautilus Solar Solutions | West Brookfield, MA | 5 GWh | May 2017 | Dec 2025 | Solar |
| WED Kingstown Solar I - East Array | CleanCapital Holdings | Washington, RI | 5 GWh | Nov 2017 | Dec 2025 | Solar |
| WED Stilson Solar | CleanCapital Holdings | Richmond, RI | 3 GWh | Nov 2017 | Dec 2025 | Solar |
| WED Kingstown Solar I, LLC - West | CleanCapital Holdings | Richmond, RI | 2 GWh | Nov 2017 | Dec 2025 | Solar |
| UMASS | RWE Clean Energy | Amherst, MA | 5 GWh | Sep 2016 | Dec 2025 | Solar |
| CED Chicopee Solar | RWE Clean Energy | Chicopee, MA | 5 GWh | Jun 2017 | Dec 2025 | Solar |
| Tyngsborough Solar | Citizens Enterprises Corporation | Tyngsborough, MA | 3 GWh | Dec 2016 | Dec 2025 | Solar |
| Norton Landfill Solar | Citizens Enterprises Corporation | Norton, MA | 2 GWh | Dec 2016 | Dec 2025 | Solar |
| Citizens Agawam Landfill Solar | Citizens Enterprises Corporation | Agawam, MA | 3 GWh | Mar 2017 | Dec 2025 | Solar |
| Town of Foxborough - Landfill (SREC II) | Town of Foxborough - Landfill (SREC II) | Foxborough, MA | 2 GWh | Jul 2017 | Dec 2025 | Solar |
| DG Foxborough Elm CSG | DG Foxborough Elm LLC | Foxborough, MA | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Falmouth Landfill Solar | Citizens Enterprises Corporation | Falmouth, MA | 5 GWh | Mar 2017 | Dec 2025 | Solar |
| DG Crystal Spring CSG | DG Crystal Spring LLC | Mattapoisett, MA | 7 GWh | Jun 2017 | Dec 2025 | Solar |
| DG Haverhill CSG | DG Haverhill LLC | Haverhill, MA | 7 GWh | Aug 2017 | Dec 2025 | Solar |
| Town of Rocky Hill PV CSG | Tesla Inc. | Rocky Hill, CT | 5 GWh | Feb 2018 | Dec 2025 | Solar |
| GELD Solar Farm | Ameresco, Inc - GELD | Groton, MA | 3 GWh | May 2016 | Dec 2025 | Solar |
| Braintree Landfill Solar | Ameresco, Inc - Braintree | Braintree, MA | 1 GWh | Nov 2014 | Dec 2025 | Solar |
| Weston Landfill Solar | Ameresco, Inc - Weston | Weston, MA | 3 GWh | Feb 2016 | 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 |