2. Balancing Authorities
  3. ISO New England

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 Dec 2025
Annual Generation 105.8 TWh
Power Plants1,577
Utilities819
Ranked #15 out of 65 in terms of net annual generation
Ranked #12 out of 53 in terms of annual generation from natural gas
Power Plant Types Natural Gas | 55.8% Nuclear | 25.9% Water | 5% Other Fuel | 4.4% Wind | 4% Solar | 1.5% 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 601 to 700 of 1,306
Plant NameUtilityLocationAnnual GenerationPlant DateLast UpdateFuel Types
ME-EDFR-Phase I-WoolwichGreen Mile Solar, LLCWoolwich, ME7 GWhAug 2023Dec 2024 Solar
PetersonGreen Mountain Power CorpMilton, VT31 GWhJan 1948Dec 2024 Water
Huntington FallsGreen Mountain Power CorpWeybridge, VT23 GWhSep 1988Dec 2024 Water
Ottauquechee HydroGreen Mountain Power CorpN. Hartland, VT978 MWhMar 1983Dec 2024 Water
GMP Solar - Panton HybridGreen Mountain Power CorpPanton, VT9 GWhNov 2016Sep 2025 Solar : 99.1% Electricity used for energy storage : 0.9%
West Danville 15Green Mountain Power CorpDanville, VT3 GWhDec 1916Dec 2024 Water
PittsfordGreen Mountain Power CorpPittsford, VT8 GWhJan 1914Dec 2024 Water
Essex Junction 19Green Mountain Power CorpEssex Junction, VT32 GWhDec 1916Sep 2025 Water : 99.6%
GMP Solar/Storage-Milton HybridGreen Mountain Power CorpMilton, VT7 GWhAug 2019Sep 2025 Solar : 98.6% Electricity used for energy storage : 1.4%
Middlesex 2Green Mountain Power CorpMoretown, VT10 GWhDec 1927Dec 2024 Water
RutlandGreen Mountain Power CorpRutland City, VT84 MWhNov 1962Mar 2024 Distillate Fuel Oil
SalisburyGreen Mountain Power CorpSalisbury, VT2 GWhJan 1917Dec 2024 Water
Silver Lake (VT)Green Mountain Power CorpSalisbury, VT5 GWhJan 1917Dec 2024 Water
WeybridgeGreen Mountain Power CorpWeybridge, VT14 GWhJan 1951Dec 2024 Water
GMP Solar/Storage-Ferrisburgh HybridGreen Mountain Power CorpFerrisburgh, VT8 GWhAug 2019Sep 2025 Solar : 98.7% Electricity used for energy storage : 1.3%
GMP Solar/Storage-Essex HybridGreen Mountain Power CorpEssex, VT7 GWhAug 2019Sep 2025 Solar : 98.6% Electricity used for energy storage : 1.4%
Marshfield 6Green Mountain Power CorpMarshfield, VT8 GWhDec 1926Dec 2024 Water
Berlin 5Green Mountain Power CorpBerlin, VT1 GWhMay 1972Sep 2025 Kerosene
Colchester 16Green Mountain Power CorpColchester, VT279 MWhSep 1965Dec 2024 Distillate Fuel Oil
MiltonGreen Mountain Power CorpMilton, VT44 GWhJan 1929Dec 2024 Water
GMP Solar - RichmondGreen Mountain Power CorpRichmond, VT3 GWhSep 2016Sep 2025 Solar
Stafford Hill Solar HybridGreen Mountain Power CorpRutland, VT675 MWhFeb 2015Sep 2025 Solar
Salmon FallsGreen Mountain Power CorpSouth Berwick, ME3 GWhJun 1986Dec 2024 Water
Somersworth Lower Great DamGreen Mountain Power CorpSomersworth, NH3 GWhJun 1985Jun 2024 Water
Searsburg Wind TurbineGreen Mountain Power CorpSearsburg, VT12 GWhMay 1997Sep 2025 Wind
Waterbury 22Green Mountain Power CorpWaterbury, VT15 GWhMay 1953Dec 2024 Water
Vergennes 9Green Mountain Power CorpVergennes, VT8 GWhDec 1911Dec 2024 Water
Gorge 18Green Mountain Power CorpSouth Burlington, VT17 GWhDec 1927Dec 2024 Water
EHC West HopkintonGreen Mountain Power CorpWest Hopkinton, NH3 GWhJun 1985Jul 2024 Water
Kingdom Community WindGreen Mountain Power CorpLowell, VT180 GWhOct 2012Sep 2025 Wind
Carver FallsGreen Mountain Power CorpHampton, NY6 GWhJan 1922Dec 2024 Water
RollinsfordGreen Mountain Power CorpRollinsford, NH2 GWhSep 1986Dec 2024 Water
Mascoma HydroGreen Mountain Power CorpW. Lebanon, NH2 GWhNov 1988Dec 2024 Water
BeldensGreen Mountain Power CorpNew Haven, VT14 GWhJul 1913Dec 2024 Water
AscutneyGreen Mountain Power CorpWeatherfield, VT113 MWhJul 1961Sep 2025 Distillate Fuel Oil
ProctorGreen Mountain Power CorpProctor, VT31 GWhJul 1905Dec 2024 Water
Smith (VT)Green Mountain Power CorpBradford, VT2 GWhNov 1982Dec 2024 Water
CavendishGreen Mountain Power CorpCavendish, VT830 MWhJan 1907Dec 2024 Water
Clark FallsGreen Mountain Power CorpMilton, VT17 GWhJan 1937Dec 2024 Water
Fairfax FallsGreen Mountain Power CorpFairfax, VT20 GWhJan 1919Dec 2024 Water
GlenGreen Mountain Power CorpRutland, VT6 GWhJul 1920Dec 2024 Water
GMP Solar - WillistonGreen Mountain Power CorpWilliston, VT6 GWhOct 2016Sep 2025 Solar
GMP Solar - WilliamstownGreen Mountain Power CorpWilliamstown, VT7 GWhNov 2016Sep 2025 Solar
Lower MiddleburyGreen Mountain Power CorpMiddlebury Lower, VT4 GWhJul 1917Dec 2024 Water
GMP Solar - HartfordGreen Mountain Power CorpHartford, VT7 GWhNov 2016Sep 2025 Solar
Green Providence Wind I, LLCGreen Providence Wind I, LLCProvidence, RI2 GWhNov 2021Dec 2024 Wind
Green Providence Wind II, LLCGreen Providence Wind II, LLCProvidence, RI4 GWhNov 2021Dec 2024 Wind
Randall Road Solar IIGreen Street Power PartnersBallston Spa, NY1 GWhJun 2024Dec 2024 Solar
Swaggertown Solar IGreen Street Power PartnersGlenville, NY122 MWhOct 2024Dec 2024 Solar
Randall Road Solar IGreen Street Power PartnersBallston Spa, NY2 GWhJun 2024Dec 2024 Solar
GSPP 126 Little Bow Rd S, LLCGreen Street Power PartnersGouverneur, NY4 GWhNov 2023Dec 2024 Solar
Saratoga Solar IV, LLCGreen Street Power PartnersRock City Falls, NY4 GWhSep 2023Dec 2024 Solar
Saratoga Solar III, LLCGreen Street Power PartnersMiddle Grove, NY6 GWhNov 2023Dec 2024 Solar
GSPP 126 Little Bow Rd N, LLCGreen Street Power PartnersGouverneur, NY3 GWhNov 2023Dec 2024 Solar
GSPP 4643 Twelve Corners Road, LLCGreen Street Power PartnersAuburn, NY8 GWhMay 2023Dec 2024 Solar
GSPP NESV, LLCGreen Street Power PartnersAttleboro, MA2 GWhFeb 2023Dec 2024 Solar
GSPP 7024 Fox Rd, LLCGreen Street Power PartnersMarcy, NY8 GWhApr 2023Dec 2024 Solar
Swaggertown Solar IIGreen Street Power PartnersGlenville, NY1 GWhAug 2024Dec 2024 Solar
CP Middletown Solar I LLCGreen Street Power PartnersMiddletown, CT2 GWhNov 2019Dec 2024 Solar
Ajax Solar, LLC (MA)Green Street Power PartnersWest Bridgewater, MA4 GWhNov 2017Dec 2024 Solar
GSPP Raynham TMLP, LLC CSGGreen Street Power PartnersRaynham, MA4 GWhJan 2019Dec 2024 Solar
GSPP Terrawatt Westfield LLC CSGGreen Street Power PartnersWestfield, MA6 GWhJan 2019Dec 2024 Solar
GSPP Devens, LLCGreen Street Power PartnersAyer, MA3 GWhDec 2018Dec 2024 Solar
GSPP Gilman, LLCGreen Street Power PartnersLunenburg, VT3 GWhAug 2018Dec 2024 Solar
CP Middletown Solar II LLCGreen Street Power PartnersMiddletown, CT2 GWhNov 2019Dec 2024 Solar
WED Portsmouth One, LLCGreenbacker Renewable Energy CorporationPortsmouth, RI4 GWhJul 2016Dec 2024 Wind
Nextsun Energy LittletonGreenbacker Renewable Energy CorporationLittleton, MA5 GWhSep 2013Dec 2024 Solar
WED Coventry 5Greenbacker Renewable Energy CorporationCoventry, RI3 GWhFeb 2017Dec 2024 Wind
WED Coventry 6Greenbacker Renewable Energy CorporationCoventry, RI8 GWhJul 2016Sep 2025 Wind
Georgia Mountain Community Wind FarmGreenbacker Renewable Energy CorporationMilton, VT30 GWhNov 2012Sep 2025 Wind
Main Street Solar ProjectGreenbacker Renewable Energy CorporationRutland, VT2 GWhNov 2014Dec 2024 Solar
Holiday Hill Community WindGreenbacker Renewable Energy CorporationRussell, MA10 GWhNov 2019Dec 2024 Wind
Brattleboro (Windham Landfill)Greenbacker Renewable Energy CorporationBrattleboro, VT7 GWhJul 2018Dec 2024 Solar
Pleasant StreetGreenbacker Renewable Energy CorporationWilton, ME5 GWhNov 2023Dec 2024 Solar
Dairy FarmGreenbacker Renewable Energy CorporationAnson, ME542 MWhSep 2024Dec 2024 Solar
MoscowGreenbacker Renewable Energy CorporationMoscow, ME14 GWh-Sep 2025 Wind
Mars HillGreenbacker Renewable Energy CorporationMars Hill, ME95 MWhOct 2024Dec 2024 Solar
Athens RidgeGreenbacker Renewable Energy CorporationAthens, ME4 GWhFeb 2024Dec 2024 Solar
Richmond HillGreenbacker Renewable Energy CorporationRichmond, ME3 GWhNov 2023Dec 2024 Solar
South Street - MiddleburyGreenbacker Renewable Energy CorporationMiddlebury, VT3 GWhNov 2023Dec 2024 Solar
Lawrence BrookGreenbacker Renewable Energy CorporationMorristown, VT3 GWhNov 2020Dec 2024 Solar
Norton LLCGreenbacker Renewable Energy CorporationNorton, MA4 GWhAug 2020Apr 2024 Solar
ER Salvage YardGreenbacker Renewable Energy CorporationMorrisville, VT3 GWhOct 2021Dec 2024 Solar
Billings RoadGreenbacker Renewable Energy CorporationHardwick, VT2 GWhOct 2021Dec 2024 Solar
Park StGreenbacker Renewable Energy CorporationRutland, VT2 GWhNov 2014Dec 2024 Solar
Holliston LLCGreenbacker Renewable Energy CorporationHolliston, MA2 GWhSep 2020Dec 2024 Solar
WoburnGreenbacker Renewable Energy CorporationWoburn, MA2 GWhNov 2020Dec 2024 Solar
Fredonia Solar LLCGreenbacker Renewable Energy CorporationFredonia, NY2 GWhAug 2021Dec 2024 Solar
ER Center Road Solar, LLCGreenbacker Renewable Energy CorporationHardwick, VT3 GWhApr 2022Dec 2024 Solar
ER Sand HillGreenbacker Renewable Energy CorporationCastleton, VT4 GWhOct 2022Dec 2024 Solar
115 G FisherGreenbacker Renewable Energy CorporationMiddleborough, MA1 GWhSep 2015Dec 2024 Solar
ER Bone Hill Solar, LLCGreenbacker Renewable Energy CorporationNorthfield, VT2 GWhAug 2022Dec 2024 Solar
154 D FisherGreenbacker Renewable Energy CorporationMiddleborough, MA2 GWhNov 2015Dec 2024 Solar
Griffin Road Solar 2Griffin Road Solar 2, LLCCharlton, MA2 GWhMay 2020Dec 2024 Solar
Griffin Road Solar, LLC CSGGriffin Road Solar, LLCCharlton, MA3 GWhFeb 2018Dec 2024 Solar
Pfizer Groton Fuel CellGroton Fuel Cell 1 LLCGroton, CT30 GWhSep 2016Dec 2024 Natural Gas
Naval Sub Base New London Fuel CellGroton Station Fuel Cell, LLCGroton, CT44 GWhNov 2022Dec 2024 Natural Gas
GSPP Boxborough Littleton (MA)GSPP Boxborough Littleton, LLCBoxborough, MA6 GWhDec 2018Dec 2024 Solar
Cranberry SolarGWE Cranberry Solar RT, LLCMiddleborough, MA1 GWhNov 2016Dec 2024 Solar
Hadley 2 Solar, LLC CSGHadley 2 Solar, LLCHadley, MA3 GWhNov 2016Dec 2024 Solar

Surrounding Balancing Authorities

RankBalancing AuthorityAnnual Net Generation# Power Plants
#61Alcoa Power Generating, Inc. - Yadkin Division689.8 GWh4
#25Dominion Energy South Carolina, Inc.25.5 TWh87
#13Duke Energy Carolinas112.3 TWh565
#17Duke Energy Progress East64.4 TWh559
#52Duke Energy Progress West4.3 TWh10
#24Louisville Gas and Electric Company and Kentucky Utilities Company34.4 TWh25
#12New York Independent System Operator131.9 TWh1,211
#1PJM Interconnection, LLC871.2 TWh2,465
#30South Carolina Public Service Authority18.8 TWh34
#59Southeastern Power Administration1.4 TWh11

Balancing Authorities with Similar Net Generation

RankBalancing AuthorityAnnual Net Generation# Power Plants
#7California Independent System Operator188.2 TWh2,075
#9Tennessee Valley Authority161.7 TWh204
#10Florida Power & Light Co.149.1 TWh187
#12New York Independent System Operator131.9 TWh1,211
#13Duke Energy Carolinas112.3 TWh565
#15ISO New England105.8 TWh1,577
#16Bonneville Power Administration80.6 TWh163
#17Duke Energy Progress East64.4 TWh559
#18PacifiCorp East61.1 TWh216
#19Salt River Project Agricultural Improvement and Power District59.9 TWh48