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

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Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
W K Sanders	Village of Morrisville - (VT)	Hyde Park, VT	716 MWh	Jun 1983	Nov 2025	Water
W. Orange Rd Solar LLC	AES Distributed Energy	Orange, MA	8 GWh	Aug 2021	Dec 2025	Solar
Wachusett Solar	Wachusett Solar, LLC	Rutland, MA	3 GWh	Jul 2019	Dec 2025	Solar
Walden Solar Maine V	Walden Solar Maine V LLC	Leeds, ME	36 GWh	Nov 2024	Dec 2025	Solar
Wallingford Energy	Wallingford Energy LLC	Wallingford, CT	107 GWh	Jul 2001	Dec 2025	Natural Gas
Wallingford Solar	Wallingford Renewable Energy, LLC	Wallingford, CT	15 GWh	Aug 2021	Dec 2025	Solar
Walpole Solar 2	Walpole Solar 2, LLC	Walpole, MA	4 GWh	Mar 2014	Dec 2025	Solar
Ward Solar 1, LLC	REA Investments, LLC	Carver, MA	3 GWh	Jan 2019	Dec 2025	Solar
Ware Palmer Road Solar LLC CSG	Ware Palmer Road Solar LLC	Ware, MA	5 GWh	May 2021	Dec 2024	Solar
Wareham MA 1 Community Solar	Navisun LLC	Wareham, MA	3 GWh	Aug 2016	Dec 2025	Solar
Wareham Solar PV	NSTAR Electric Company	Wareham, MA	1 GWh	Nov 2018	Dec 2025	Solar
Washburn Road Solar	REA Investments, LLC	Freetown, MA	3 GWh	Nov 2018	Dec 2025	Solar
Washington WS01	Nautilus Solar Solutions	Washington, ME	5 GWh	May 2022	Dec 2025	Solar
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	22 GWh	Feb 2009	Dec 2025	Landfill Gas
Water Street Solar	AES Distributed Energy	Randolph, ME	7 GWh	Nov 2022	Dec 2025	Solar
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	494 MWh	Sep 2010	May 2026	Distillate Fuel Oil
Waterboro	Madison Energy Investments LLC	East Waterboro, ME	3 GWh	Jun 2023	Dec 2024	Solar
Waterbury 22	Green Mountain Power Corp	Waterbury, VT	11 GWh	May 1953	Dec 2025	Water
Waterbury Generation	Engie North America	Waterbury, CT	55 GWh	May 2009	Dec 2025	Natural Gas : 99.1% Kerosene : 0.9%
Waters River	City of Peabody - (MA)	Peabody, MA	6 GWh	Nov 1971	Dec 2025	Natural Gas : 71.3% Distillate Fuel Oil : 28.7%
Waterside Power, LLC	Waterside Power, LLC	Stamford, CT	2 GWh	May 2003	Dec 2025	Distillate Fuel Oil
Watertown Solar One, LLC	DG Connecticut III, LLC	Watertown, CT	3 GWh	May 2021	Dec 2025	Solar
Weaver Wind	Greenbacker Renewable Energy Corporation	Township 16, ME	214 GWh	Nov 2020	May 2026	Wind
WEB Brookfield	WEB Brookfield Solar LLC	Brookfield, MA	6 GWh	Nov 2021	Dec 2025	Solar
Webb Road Solar	NextGrid Mastic, LLC	Waterville, ME	5 GWh	Aug 2022	Dec 2025	Solar
Webster Solar	Webster Solar, LLC	Webster, MA	1 GWh	Nov 2017	Dec 2025	Solar
WED Coventry 1	WED Coventry One, LLC	Coventry, RI	3 GWh	Sep 2016	Dec 2025	Wind
WED Coventry 2	WED Coventry Two, LLC	Coventry, RI	9 GWh	Jul 2016	May 2026	Wind
WED Coventry 3	WED Coventry Three, LLC	Coventry, RI	3 GWh	Jul 2016	Dec 2025	Wind
WED Coventry 4	WED Coventry Four, LLC	Coventry, RI	3 GWh	Jul 2016	Dec 2025	Wind
WED Coventry 5	Greenbacker Renewable Energy Corporation	Coventry, RI	3 GWh	Feb 2017	Dec 2025	Wind
WED Coventry 6	Greenbacker Renewable Energy Corporation	Coventry, RI	8 GWh	Jul 2016	May 2026	Wind
WED Coventry Seven, LLC	WED Coventry Seven, LLC	Coventry, RI	5 GWh	Nov 2020	Dec 2025	Solar
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	6 GWh	Dec 2018	May 2026	Wind
WED GW Solar, LLC	CleanCapital Holdings	Lincoln, RI	4 GWh	Dec 2018	Dec 2025	Solar
WED Kingstown Solar I - East Array	CleanCapital Holdings	Washington, RI	5 GWh	Nov 2017	Dec 2025	Solar
WED Kingstown Solar I, LLC - West	CleanCapital Holdings	Richmond, RI	2 GWh	Nov 2017	Dec 2025	Solar
WED NK Green	WED NK Green LLC	North Kingstown, RI	3 GWh	Feb 2012	Dec 2025	Wind
WED Plainfield II, LLC	WED Plainfield II, LLC	Johnston, RI	8 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, LLC	WED Plainfield, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Portsmouth One, LLC	Greenbacker Renewable Energy Corporation	Portsmouth, RI	5 GWh	Jul 2016	Dec 2025	Wind
WED Shun I, LLC	WED Shun I, LLC	Johnston, RI	7 GWh	Dec 2018	May 2026	Wind
WED Shun II, LLC	WED Shun II, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Shun III, LLC	WED Shun III, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
WED Stilson Solar	CleanCapital Holdings	Richmond, RI	3 GWh	Nov 2017	Dec 2025	Solar
Wellesley College Central Utility Plant	Wellesley College	Wellesley, MA	10 GWh	May 1985	Dec 2025	Natural Gas
Wells (ME)	Nautilus Solar Solutions	Wells, ME	8 GWh	Jun 2022	Dec 2025	Solar
Wendell MA 1	Wendell MA 1 LLC	Wendell, MA	1 GWh	Nov 2018	Dec 2025	Solar
Wesleyan University Cogen 1	Wesleyan University	Middletown, CT	4 GWh	Jan 2009	Dec 2025	Natural Gas
West A&B Solar Project Hybrid CSG	AES Distributed Energy	Southbridge, MA	5 GWh	Nov 2020	Dec 2025	Solar
West Boylston Community Shared Solar	Town of West Boylston - (MA)	West Boylston, MA	447 MWh	Nov 2016	Dec 2025	Solar
West Bridgewater AB CSG	MN8 Energy LLC	West Bridgewater, MA	3 GWh	May 2017	Dec 2025	Solar
West Brookfield Solar - Gilbertsville Rd	Nautilus Solar Solutions	West Brookfield, MA	5 GWh	May 2017	Dec 2025	Solar
West Brookfield Solar, LLC	CVI CleanCapital Solar 7	West Brookfield, MA	2 GWh	Dec 2015	Dec 2025	Solar
West Buxton	Brookfield White Pine Hydro LLC	Buxton, ME	21 GWh	Dec 1903	Dec 2025	Water
West Charleston	Barton Village, Inc	West Charleston, VT	6 GWh	Jun 1931	Jul 2025	Water
West Danville 15	Green Mountain Power Corp	Danville, VT	2 GWh	Dec 1916	Dec 2025	Water
West Davisville Solar	Altus Power America Management, LLC	North Kingstown, RI	3 GWh	Nov 2013	Dec 2025	Solar
West Enfield Hydro	Brookfield Black Bear Hydro, LLC	West Enfield, ME	70 GWh	Mar 1988	Dec 2025	Water
West Greenwich Solar	RWE Clean Energy	West Greenwich, RI	2 GWh	Apr 2013	May 2026	Solar
West Groton CHP	Hollingsworth & Vose Co West Groton	Groton, MA	22 GWh	Nov 2015	Dec 2024	Natural Gas
West Haydenville PJ Community Solar	AES Distributed Energy	Williamsburg, MA	9 GWh	Aug 2022	Dec 2025	Solar : 99.8%
West Street Solar 1 LLC	AES Distributed Energy	Gardner, MA	8 GWh	Nov 2019	Dec 2025	Solar
West Tisbury Generating Facility	Vineyard Reliability LLC	West Tisbury, MA	5 GWh	Dec 1974	Sep 2025	Distillate Fuel Oil
West Water Street	City of Taunton - (MA)	Taunton, MA	2 GWh	Dec 2017	Dec 2025	Distillate Fuel Oil
Westborough Solar LLC	SunRay Power LLC	Westborough, MA	2 GWh	Mar 2014	Dec 2024	Solar
Westbrook Energy Center Power Plant	Westbrook Energy Center	Westbrook, ME	4 TWh	Apr 2001	May 2026	Natural Gas
Westford Solar Park	MN8 Energy LLC	Westford, MA	4 GWh	Mar 2012	Dec 2025	Solar
Westhampton	Sunrise on Montague Rd. LLC	Westhampton, MA	7 GWh	Nov 2020	Dec 2024	Solar
Westminster	MN8 Energy LLC	Westminster, VT	2 GWh	Nov 2016	Dec 2025	Solar
Westminster Renewables, LLC CSG	Westminster Renewables, LLC	Westminster, MA	2 GWh	Sep 2018	Dec 2025	Solar
Weston Hydro	Brookfield White Pine Hydro LLC	Skowhegan, ME	57 GWh	Dec 1919	Dec 2025	Water
Weston Landfill Solar	Ameresco, Inc - Weston	Weston, MA	3 GWh	Feb 2016	Dec 2025	Solar
Westport B Community Solar Garden	BWC Hamilton Brook LLC	Westport, MA	8 GWh	Oct 2018	Dec 2025	Solar
Westport Community Solar Garden	BWC Bass River LLC	Westport, MA	4 GWh	Jun 2017	Dec 2024	Solar
Westport (MA)	Sunrise on Drift Rd. LLC	Westport, MA	4 GWh	Sep 2020	Dec 2024	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
Westport Stone & Sand Solar (CSG)	AES Clean Energy	Westport, MA	7 GWh	Feb 2024	Dec 2025	Solar
Westtown CSG	Altus Power America Management, LLC	Westtown, NY	3 GWh	Apr 2019	Dec 2025	Solar
Weybridge	Green Mountain Power Corp	Weybridge, VT	10 GWh	Jan 1951	Dec 2025	Water
Whately Solar	Citizens Enterprises Corporation	Whately, MA	2 GWh	Feb 2013	Dec 2025	Solar
Whatley Renewables	Whatley Renewables, LLC	Whatley, MA	2 GWh	Sep 2020	Dec 2025	Solar
Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, CT	430 GWh	Jun 1988	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Concord Facility	Wheelabrator Environmental Systems	Concord, NH	93 GWh	Mar 1989	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, CT	101 GWh	Sep 1995	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	288 GWh	Aug 1987	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	240 GWh	Apr 1985	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Saugus	Wheelabrator Environmental Systems	Saugus, MA	180 GWh	Jul 1985	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Whitcomb Solar Farm	ERWR Whitcomb Farm Solar LLC	Essex Junction, VT	3 GWh	Sep 2014	Dec 2025	Solar
White Brook Renewables PV	White Brook Renewables LLC	West Greenwich, RI	7 GWh	Nov 2024	Dec 2025	Solar
White Lake	Granite Shore Power	Tamworth, NH	484 MWh	Jun 1968	Dec 2024	Jet Fuel
White Rock Road LLC	White Rock Road LLC	Westerly, RI	11 GWh	Nov 2022	Dec 2025	Solar
Wilbraham	BWC East Brook, LLC	Wilbraham, MA	6 GWh	Nov 2020	Dec 2025	Solar
Wilbur Woods Solar LLC	AES Distributed Energy	Orange, MA	8 GWh	Aug 2021	Dec 2025	Solar
Wilder	Great River Hydro, LLC	Hartford, VT	134 GWh	Oct 1950	Dec 2025	Water
Wilkins Station	Town of Marblehead - (MA)	Marblehead, MA	32 MWh	Oct 1975	Dec 2025	Distillate Fuel Oil
William F Wyman Hybrid	FPL Energy Wyman LLC	Yarmouth, ME	339 GWh	Dec 1956	May 2026	Residual Fuel Oil : 99.6%
Williams College - Campus CHP	President & Trustees of Williams College	Williamstown, MA	3 GWh	Feb 2003	Dec 2025	Natural Gas : 98.4% Distillate Fuel Oil : 1.6%

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