ISO New England

Balancing Authority Summary Information

ISO New England is ranked #15 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing AuthorityISO New England
States Connecticut Maine Massachusetts New Hampshire New York Rhode Island Vermont
Last Update Jun 2025
Annual Generation 103.1 TWh
Power Plants1,561
Utilities814
Ranked #15 out of 65 in terms of net annual generation
Ranked #11 out of 53 in terms of annual generation from natural gas
Power Plant Types Natural Gas | 57.1% Nuclear | 24.7% Water | 6.3% Other Fuel | 4.5% Wind | 3.7% Solar | 1.4% Coal | 0.3%

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Daily Net Generation for ISO New England for the past 3 Years

List of All ISO New England Power Plants

Displaying Results 1 to 100 of 1,270
Plant NameUtilityLocationAnnual GenerationPlant DateLast UpdateFuel Types
William F Wyman HybridFPL Energy Wyman LLCYarmouth, ME50 GWhDec 1956Mar 2025 Residual Fuel Oil : 99.2% Distillate Fuel Oil : 0.8%
Franklin 1CD US Solar MT 2 LLCWrentham, MA4 GWhOct 2013Dec 2024 Solar
International Paper Woronoco MillEagle Creek Renewable Energy, LLCWoronoco, MA5 GWhDec 1912Dec 2024 Water
Clark UniversityClark UniversityWorcester, MA4 GWhDec 2012Dec 2024 Natural Gas
Worcester LandfillCity of Worcester DPWWorcester, MA9 GWhApr 2017Dec 2023 Solar
Univ of Massachusetts Medical CenterUniversity of Massachusetts MedicalWorcester, MA69 GWhMar 1974Dec 2024 Natural Gas : 99.2% Distillate Fuel Oil : 0.7%
Norton Powerhouse 2Norton Powerhouse 2Worcester, MA29 GWhOct 2022Dec 2024 Natural Gas
ME-EDFR-Phase I-WoolwichGreen Mile Solar, LLCWoolwich, ME7 GWhAug 2023Dec 2024 Solar
Park SolarEcos Energy LLCWoodbridge, CT866 MWhNov 2023Dec 2024 Solar
UI RCP Woodbridge FCUnited Illuminating CoWoodbridge, CT18 GWhNov 2016Dec 2024 Natural Gas
Richmond NMCAAES Distributed EnergyWood River Junction, RI5 GWhNov 2018Mar 2025 Solar
WoburnGreenbacker Renewable Energy CorporationWoburn, MA2 GWhNov 2020Dec 2024 Solar
Cenergy - Wiscasset (CSG)Luminace Sunbeam Development Holdings, LLCWiscasset, ME9 GWhJun 2023Dec 2024 Solar
Deer Island Treatment PlantMassachusetts Wtr Rauth-Deer IWinthrop, MA35 GWhJul 1995Mar 2025 Other Biomass Gas : 78.7% Distillate Fuel Oil : 12.5% Water : 4.8% Wind : 2.3% Solar : 1.8%
Hydro Kennebec ProjectHydro Kennebec LLCWinslow, ME27 GWhDec 1988Dec 2024 Water
Winslow PV - BD Solar 2 LLCBD Solar 2 LLCWinslow, ME13 GWhJun 2022Dec 2024 Solar
Chace Mill Winooski OneCity of Burlington Electric - (VT)Winooski, VT29 GWhMar 1993Dec 2024 Water
Rollins Wind ProjectEvergreen Wind, LLCWinn Village, ME136 GWhJun 2011Dec 2024 Wind
Rainbow (CT)Farmington River Power CompanyWindsor, CT22 GWhNov 1925Mar 2025 Water
Algonquin Windsor LocksAhlstrom Power Windsor Locks LLCWindsor Locks, CT120 GWhDec 1989Mar 2025 Natural Gas : 99.9%
Bradley Energy CenterAmeresco Select IncWindsor Locks, CT12 GWhOct 2002Dec 2024 Natural Gas
Scotland DamFirstLight Power Resources Services LLCWindham, CT7 GWhDec 1936Dec 2024 Water
Platt HillLSE Pictor LLCWinchester, CT2 GWhDec 2021Dec 2024 Solar
580 River SolarNuGen Capital ManagementWinchendon, MA5 GWhAug 2018Dec 2024 Solar
Happy Hollow CSG HybridREA Investments, LLCWinchendon, MA8 GWhSep 2019Dec 2023 Solar
Winchendon SolarAltus Power America Management, LLCWinchendon, MA2 GWhMar 2014Dec 2024 Solar
Winchendon Landfill SolarOnyx Asset Services GroupWinchendon, MA3 GWhSep 2018Dec 2024 Solar
Pleasant StreetGreenbacker Renewable Energy CorporationWilton, ME5 GWhNov 2023Dec 2024 Solar
Aziscohos Hydroelectric ProjectBrookfield White Pine Hydro LLCWilson Mills, ME36 GWhMay 1988Dec 2024 Water
Wilmington SolarMN8 Energy LLCWilmington, MA3 GWhOct 2015Dec 2024 Solar
Kearsarge WilmingtonKearsarge Wilmington LLCWilmington, MA2 GWhNov 2017Dec 2024 Solar
GMP Solar - WillistonGreen Mountain Power CorpWilliston, VT7 GWhOct 2016Mar 2025 Solar
Williamstown SolarCVI CleanCapital Solar 1 LLCWilliamstown, VT2 GWhNov 2012Dec 2023 Solar
GMP Solar - WilliamstownGreen Mountain Power CorpWilliamstown, VT7 GWhNov 2016Mar 2025 Solar
Williams College - Campus CHPPresident & Trustees of Williams CollegeWilliamstown, MA1 GWhFeb 2003Dec 2024 Natural Gas : 84.0% Distillate Fuel Oil : 16.0%
West Haydenville PJ Community SolarAES Distributed EnergyWilliamsburg, MA9 GWhAug 2022Dec 2024 Solar
ZPD-PT Solar Project 2017-021 LLC HybridAES Distributed EnergyWilbraham, MA2 GWhDec 2020Dec 2024 Solar
WilbrahamBWC East Brook, LLCWilbraham, MA5 GWhNov 2020Dec 2024 Solar
Collins FacilityRelevate Power Management LLCWilbraham, MA7 GWhFeb 1985Dec 2023 Water
NEDC Solar SiteMassachusetts Electric CoWhitinsville, MA979 MWhMay 2010Dec 2024 Solar
Syncarpha Northbridge II Hybrid CSGSyncarpha Northbridge II, LLCWhitinsville, MA8 GWhMar 2021Dec 2023 Solar
Syncarpha Northbridge I Hybrid(CSG)Syncarpha Northbridge I, LLCWhitinsville, MA9 GWhNov 2021Dec 2024 Solar
HarrimanGreat River Hydro, LLCWhitingham, VT91 GWhApr 1924Dec 2024 Water
NE Renewable Whitefield, LLCNE Renewable Whitefield, LLCWhitefield, NH54 GWhFeb 1988Dec 2024 Wood/Wood Waste Solids
LR Wheatfield Solar 1LR Wheatfield Solar 1, LLCWheatfield, NY8 GWhSep 2020Dec 2024 Solar
Whatley RenewablesWhatley Renewables, LLCWhatley, MA2 GWhSep 2020Dec 2024 Solar
Long Plain SolarLong Plain Solar, LLCWhatley, MA4 GWhNov 2019Dec 2024 Solar
Fairview Farms SolarNuGen Capital ManagementWhately, MA3 GWhMay 2014Dec 2024 Solar
Whately SolarCitizens Enterprises CorporationWhately, MA2 GWhFeb 2013Dec 2024 Solar
WeybridgeGreen Mountain Power CorpWeybridge, VT14 GWhJan 1951Dec 2024 Water
Huntington FallsGreen Mountain Power CorpWeybridge, VT23 GWhSep 1988Dec 2024 Water
Westtown CSGAltus Power America Management, LLCWesttown, NY3 GWhApr 2019Dec 2023 Solar
Westport MA 2 Community SolarNavisun LLCWestport, MA2 GWhAug 2016Dec 2023 Solar
Westport MA 1 Community SolarNavisun LLCWestport, MA2 GWhAug 2016Dec 2023 Solar
Brookwood Drive Community SolarAES Distributed EnergyWestport, MA7 GWhJul 2022Dec 2024 Solar
Adirondack A+B Community Solar GardenBWC Connecticut River LLCWestport, MA8 GWhNov 2018Dec 2024 Solar
Westport Stone & Sand Solar (CSG)AES Clean EnergyWestport, MA6 GWhFeb 2024Dec 2024 Solar
Westport B Community Solar GardenBWC Hamilton Brook LLCWestport, MA4 GWhOct 2018Dec 2024 Solar
Westport Community Solar GardenBWC Bass River LLCWestport, MA4 GWhJun 2017Dec 2024 Solar
Weston Landfill SolarAmeresco, Inc - WestonWeston, MA3 GWhFeb 2016Dec 2024 Solar
WestminsterMN8 Energy LLCWestminster, VT3 GWhNov 2016Dec 2024 Solar
Theodore Drive Community SolarTheodore Drive Solar, LLCWestminster, MA2 GWhFeb 2018Dec 2024 Solar
Syncarpha Westminster Hybrid CSGSyncarpha Westminster, LLCWestminster, MA7 GWhOct 2022Dec 2024 Solar
Westminster Renewables, LLC CSGWestminster Renewables, LLCWestminster, MA2 GWhSep 2018Dec 2024 Solar
28 Livermore Hill Road Solar28 Livermore Hill Road Solar, LLCWestminster, MA8 GWhMay 2020Dec 2024 Solar
Fitchburg Gas RecoveryWM Renewable Energy LLCWestminster, MA32 GWhSep 2007Dec 2024 Landfill Gas
NE Renewable Fitchburg, LLCNE Renewable Fitchburg, LLCWestminster, MA36 GWhJul 1992Dec 2023 Wood/Wood Waste Solids : 97.6% Natural Gas : 2.4%
OverlookWestbound Solar 3, LLCWestminster, MA7 GWhFeb 2023Dec 2024 Solar
TES RowtierSkyHigh 2 SolarWestminster, MA5 GWhMar 2021Dec 2024 Solar
Westford Solar ParkMN8 Energy LLCWestford, MA5 GWhMar 2012Dec 2024 Solar
GSPP Terrawatt Westfield LLC CSGGreen Street Power PartnersWestfield, MA6 GWhJan 2019Dec 2024 Solar
Twiss Street SolarCitizens Enterprises CorporationWestfield, MA2 GWhDec 2014Dec 2024 Solar
CED Westfield Solar, LLCConsolidated Edison Development Inc.Westfield, MA3 GWhJul 2016Dec 2024 Solar
White Rock Road LLCWhite Rock Road LLCWesterly, RI7 GWhNov 2022Dec 2024 Solar
Kearsarge WesterlyKearsarge Westerly LLCWesterly, RI7 GWhNov 2020Dec 2024 Solar
Westbrook Energy Center Power PlantWestbrook Energy CenterWestbrook, ME3 TWhApr 2001Mar 2025 Natural Gas
S D Warren WestbrookRelevate Power Management LLCWestbrook, ME33 GWhDec 1902Dec 2023 Water
Westborough Solar LLCSunRay Power LLCWestborough, MA2 GWhMar 2014Dec 2024 Solar
SEMASS Resource RecoverySEMASS PartnershipWest Wareham, MA569 GWhJun 1988Mar 2025 Non-biogenic Municipal Solid Waste : 54.1% Biogenic Municipal Solid Waste : 44.3% Natural Gas : 1.5%
West Tisbury Generating FacilityVineyard Reliability LLCWest Tisbury, MA3 GWhDec 1974Dec 2024 Distillate Fuel Oil
Truck StopLSE Corona Austrina LLCWest Stockridge, MA3 GWhOct 2017Dec 2024 Solar
EHC West HopkintonGreen Mountain Power CorpWest Hopkinton, NH3 GWhJun 1985Jul 2024 Water
West Greenwich SolarConsolidated Edison Development Inc.West Greenwich, RI3 GWhApr 2013Mar 2025 Solar
GD West Greenwich Victory I, LLCGD West Greenwich Victory I, LLCWest Greenwich, RI3 GWhNov 2019Dec 2024 Solar
Hopkins Hill CSGNautilus Solar SolutionsWest Greenwich, RI9 GWhOct 2020Dec 2024 Solar
University Solar, LLCAES Distributed EnergyWest Greenwich, RI27 GWhNov 2019Mar 2025 Solar
GD West Greenwich Nooseneck I, LLCGD West Greenwich Nooseneck I, LLCWest Greenwich, RI33 GWhNov 2022Dec 2024 Solar
Robin Hollow SolarRobin Hollow Solar, LLCWest Greenwich, RI70 GWhNov 2023Mar 2025 Solar
Harris HydroBrookfield White Pine Hydro LLCWest Forks, ME170 GWhDec 1953Dec 2024 Water
West Enfield HydroBrookfield Black Bear Hydro, LLCWest Enfield, ME77 GWhMar 1988Dec 2024 Water
Indeck West Enfield Energy CenterStored Solar J&WEWest Enfield, ME51 GWhNov 1987Dec 2024 Wood/Wood Waste Solids : 99.9%
West CharlestonBarton Village, IncWest Charleston, VT7 GWhJun 1931Dec 2024 Water
West Brookfield Solar, LLCCVI CleanCapital Solar 7West Brookfield, MA2 GWhDec 2015Dec 2024 Solar
West Brookfield Solar - Gilbertsville RdNautilus Solar SolutionsWest Brookfield, MA6 GWhMay 2017Dec 2024 Solar
West Bridgewater AB CSGMN8 Energy LLCWest Bridgewater, MA3 GWhMay 2017Dec 2024 Solar
Ajax Solar, LLC (MA)Green Street Power PartnersWest Bridgewater, MA4 GWhNov 2017Dec 2024 Solar
Oakdale Power StationMassachusetts Water Res AuthWest Boylston, MA2 GWhApr 1951Dec 2024 Water
West Boylston Community Shared SolarTown of West Boylston - (MA)West Boylston, MA2 GWhNov 2016Dec 2024 Solar
BaldwinMaine DG Solar Baldwin, LLCWest Baldwin, ME10 GWhFeb 2022Dec 2024 Solar
Wendell MA 1Wendell MA 1 LLCWendell, MA1 GWhNov 2018Dec 2024 Solar

Surrounding Balancing Authorities

Balancing Authorities with Similar Net Generation

RankBalancing AuthorityAnnual Net Generation# Power Plants
#7California Independent System Operator191.1 TWh2,051
#8Tennessee Valley Authority158.8 TWh204
#10Florida Power & Light Co.149.0 TWh187
#12New York Independent System Operator130.3 TWh1,191
#13Duke Energy Carolinas111.8 TWh565
#15ISO New England103.1 TWh1,561
#16Bonneville Power Administration81.7 TWh163
#17Duke Energy Progress East65.0 TWh558
#18Salt River Project Agricultural Improvement and Power District58.9 TWh48
#19PacifiCorp East57.6 TWh215