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
Westborough Solar LLC	SunRay Power LLC	Westborough, MA	2 GWh	Mar 2014	Dec 2024	Solar
West Water Street	City of Taunton - (MA)	Taunton, MA	2 GWh	Dec 2017	Dec 2025	Distillate Fuel Oil
West Tisbury Generating Facility	Vineyard Reliability LLC	West Tisbury, MA	5 GWh	Dec 1974	Sep 2025	Distillate Fuel Oil
West Street Solar 1 LLC	AES Distributed Energy	Gardner, MA	8 GWh	Nov 2019	Dec 2025	Solar
West Haydenville PJ Community Solar	AES Distributed Energy	Williamsburg, MA	9 GWh	Aug 2022	Dec 2025	Solar : 99.8%
West Groton CHP	Hollingsworth & Vose Co West Groton	Groton, MA	22 GWh	Nov 2015	Dec 2024	Natural Gas
West Greenwich Solar	RWE Clean Energy	West Greenwich, RI	2 GWh	Apr 2013	May 2026	Solar
West Enfield Hydro	Brookfield Black Bear Hydro, LLC	West Enfield, ME	70 GWh	Mar 1988	Dec 2025	Water
West Davisville Solar	Altus Power America Management, LLC	North Kingstown, RI	3 GWh	Nov 2013	Dec 2025	Solar
West Danville 15	Green Mountain Power Corp	Danville, VT	2 GWh	Dec 1916	Dec 2025	Water
West Charleston	Barton Village, Inc	West Charleston, VT	6 GWh	Jun 1931	Jul 2025	Water
West Buxton	Brookfield White Pine Hydro LLC	Buxton, ME	21 GWh	Dec 1903	Dec 2025	Water
West Brookfield Solar, LLC	CVI CleanCapital Solar 7	West Brookfield, MA	2 GWh	Dec 2015	Dec 2025	Solar
West Brookfield Solar - Gilbertsville Rd	Nautilus Solar Solutions	West Brookfield, MA	5 GWh	May 2017	Dec 2025	Solar
West Bridgewater AB CSG	MN8 Energy LLC	West Bridgewater, MA	3 GWh	May 2017	Dec 2025	Solar
West Boylston Community Shared Solar	Town of West Boylston - (MA)	West Boylston, MA	447 MWh	Nov 2016	Dec 2025	Solar
West A&B Solar Project Hybrid CSG	AES Distributed Energy	Southbridge, MA	5 GWh	Nov 2020	Dec 2025	Solar
Wesleyan University Cogen 1	Wesleyan University	Middletown, CT	4 GWh	Jan 2009	Dec 2025	Natural Gas
Wendell MA 1	Wendell MA 1 LLC	Wendell, MA	1 GWh	Nov 2018	Dec 2025	Solar
Wells (ME)	Nautilus Solar Solutions	Wells, ME	8 GWh	Jun 2022	Dec 2025	Solar
Wellesley College Central Utility Plant	Wellesley College	Wellesley, MA	10 GWh	May 1985	Dec 2025	Natural Gas
WED Stilson Solar	CleanCapital Holdings	Richmond, RI	3 GWh	Nov 2017	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 Shun I, LLC	WED Shun I, LLC	Johnston, RI	7 GWh	Dec 2018	May 2026	Wind
WED Portsmouth One, LLC	Greenbacker Renewable Energy Corporation	Portsmouth, RI	5 GWh	Jul 2016	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
WED NK Green	WED NK Green LLC	North Kingstown, RI	3 GWh	Feb 2012	Dec 2025	Wind
WED Kingstown Solar I, LLC - West	CleanCapital Holdings	Richmond, RI	2 GWh	Nov 2017	Dec 2025	Solar
WED Kingstown Solar I - East Array	CleanCapital Holdings	Washington, RI	5 GWh	Nov 2017	Dec 2025	Solar
WED GW Solar, LLC	CleanCapital Holdings	Lincoln, RI	4 GWh	Dec 2018	Dec 2025	Solar
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	6 GWh	Dec 2018	May 2026	Wind
WED Coventry Seven, LLC	WED Coventry Seven, LLC	Coventry, RI	5 GWh	Nov 2020	Dec 2025	Solar
WED Coventry 6	Greenbacker Renewable Energy Corporation	Coventry, RI	8 GWh	Jul 2016	May 2026	Wind
WED Coventry 5	Greenbacker Renewable Energy Corporation	Coventry, RI	3 GWh	Feb 2017	Dec 2025	Wind
WED Coventry 4	WED Coventry Four, LLC	Coventry, RI	3 GWh	Jul 2016	Dec 2025	Wind
WED Coventry 3	WED Coventry Three, LLC	Coventry, RI	3 GWh	Jul 2016	Dec 2025	Wind
WED Coventry 2	WED Coventry Two, LLC	Coventry, RI	9 GWh	Jul 2016	May 2026	Wind
WED Coventry 1	WED Coventry One, LLC	Coventry, RI	3 GWh	Sep 2016	Dec 2025	Wind
Webster Solar	Webster Solar, LLC	Webster, MA	1 GWh	Nov 2017	Dec 2025	Solar
Webb Road Solar	NextGrid Mastic, LLC	Waterville, ME	5 GWh	Aug 2022	Dec 2025	Solar
WEB Brookfield	WEB Brookfield Solar LLC	Brookfield, MA	6 GWh	Nov 2021	Dec 2025	Solar
Weaver Wind	Greenbacker Renewable Energy Corporation	Township 16, ME	214 GWh	Nov 2020	May 2026	Wind
Watertown Solar One, LLC	DG Connecticut III, LLC	Watertown, CT	3 GWh	May 2021	Dec 2025	Solar
Waterside Power, LLC	Waterside Power, LLC	Stamford, CT	2 GWh	May 2003	Dec 2025	Distillate Fuel Oil
Waters River	City of Peabody - (MA)	Peabody, MA	6 GWh	Nov 1971	Dec 2025	Natural Gas : 71.3% Distillate Fuel Oil : 28.7%
Waterbury Generation	Engie North America	Waterbury, CT	55 GWh	May 2009	Dec 2025	Natural Gas : 99.1% Kerosene : 0.9%
Waterbury 22	Green Mountain Power Corp	Waterbury, VT	11 GWh	May 1953	Dec 2025	Water
Waterboro	Madison Energy Investments LLC	East Waterboro, ME	3 GWh	Jun 2023	Dec 2024	Solar
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	494 MWh	Sep 2010	May 2026	Distillate Fuel Oil
Water Street Solar	AES Distributed Energy	Randolph, ME	7 GWh	Nov 2022	Dec 2025	Solar
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	22 GWh	Feb 2009	Dec 2025	Landfill Gas
Washington WS01	Nautilus Solar Solutions	Washington, ME	5 GWh	May 2022	Dec 2025	Solar
Washburn Road Solar	REA Investments, LLC	Freetown, MA	3 GWh	Nov 2018	Dec 2025	Solar
Wareham Solar PV	NSTAR Electric Company	Wareham, MA	1 GWh	Nov 2018	Dec 2025	Solar
Wareham MA 1 Community Solar	Navisun LLC	Wareham, MA	3 GWh	Aug 2016	Dec 2025	Solar
Ware Palmer Road Solar LLC CSG	Ware Palmer Road Solar LLC	Ware, MA	5 GWh	May 2021	Dec 2024	Solar
Ward Solar 1, LLC	REA Investments, LLC	Carver, MA	3 GWh	Jan 2019	Dec 2025	Solar
Walpole Solar 2	Walpole Solar 2, LLC	Walpole, MA	4 GWh	Mar 2014	Dec 2025	Solar
Wallingford Solar	Wallingford Renewable Energy, LLC	Wallingford, CT	15 GWh	Aug 2021	Dec 2025	Solar
Wallingford Energy	Wallingford Energy LLC	Wallingford, CT	107 GWh	Jul 2001	Dec 2025	Natural Gas
Walden Solar Maine V	Walden Solar Maine V LLC	Leeds, ME	36 GWh	Nov 2024	Dec 2025	Solar
Wachusett Solar	Wachusett Solar, LLC	Rutland, MA	3 GWh	Jul 2019	Dec 2025	Solar
W. Orange Rd Solar LLC	AES Distributed Energy	Orange, MA	8 GWh	Aug 2021	Dec 2025	Solar
W K Sanders	Village of Morrisville - (VT)	Hyde Park, VT	716 MWh	Jun 1983	Nov 2025	Water
Vuelta Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2025	Solar
VPPSA Project 10	Vermont Public Power Supply Authority	Swanton, VT	1 GWh	Apr 2010	Dec 2025	Distillate Fuel Oil
Vineyard Wind 1	Vineyard Wind 1 LLC	Edgartown, MA	363 GWh	-	May 2026	Wind
Vernon Dam	Great River Hydro, LLC	Vernon, VT	119 GWh	Jul 1909	Dec 2025	Water
Vergennes 9	Green Mountain Power Corp	Vergennes, VT	8 GWh	Dec 1911	Dec 2025	Water
VEC Magee Hill Solar	SoCore Energy LLC	Hinesburgh, VT	2 GWh	Oct 2017	Dec 2025	Solar
VEC Alburgh Array	SoCore Energy LLC	Alburgh, VT	1 GWh	Nov 2016	Dec 2025	Solar
Valley Sun Solar	Valley Sun Solar LLC	Grand Isle, ME	3 GWh	Nov 2024	Dec 2025	Solar
Upton Community Solar	Upton Solar, LLC	Upton, MA	3 GWh	Aug 2017	Dec 2025	Solar
Upper Blackstone (MA) Treasure Valley	Nexamp Treasure Valley Solar, LLC	Rutland, MA	6 GWh	Jun 2014	Dec 2025	Solar
Upper Barker	KEI (Maine) Power Management (III) LLC	Auburn, ME	4 GWh	Apr 1987	Dec 2025	Water
Upland	Greenbacker Renewable Energy Corporation	Plympton, MA	3 GWh	May 2025	Dec 2025	Solar
University Solar, LLC	AES Distributed Energy	West Greenwich, RI	27 GWh	Nov 2019	May 2026	Solar
Univ of Massachusetts Medical Center	University of Massachusetts Medical	Worcester, MA	63 GWh	Mar 1974	Dec 2025	Natural Gas : 99.3% Distillate Fuel Oil : 0.6%
Unity Solar	Madison Energy Holdings LLC	Unity, ME	7 GWh	Nov 2021	Dec 2025	Solar
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	53 GWh	Aug 2006	May 2026	Landfill Gas : 55.5% Natural Gas : 42.0% Distillate Fuel Oil : 2.5%
UMass PV Lot 22	RWE Clean Energy	Amherst, MA	3 GWh	Aug 2022	Dec 2025	Solar
UMass Boston	MSS Energy Holdings, LLC (d.b.a. Calibrant Energy)	Dorchester, MA	1 GWh	Dec 1971	Dec 2025	Solar
UMASS	RWE Clean Energy	Amherst, MA	5 GWh	Sep 2016	Dec 2025	Solar
UI RCP Woodbridge FC	United Illuminating Co	Woodbridge, CT	17 GWh	Nov 2016	Dec 2025	Natural Gas
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	21 GWh	Jul 2015	May 2026	Natural Gas
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	18 GWh	Oct 2015	May 2026	Natural Gas : 84.7% Solar : 15.3%
UDR Glastonbury Fuel Cell	UIL Distributed Resources, LLC	Glastonbury, CT	16 GWh	Jan 2016	Dec 2025	Natural Gas
UCONN Cogen Facility	University of Connecticut	Storrs, CT	112 GWh	Feb 2006	May 2026	Natural Gas : 95.2% Distillate Fuel Oil : 4.8%
UB Fuel Cell	UB Fuel Cell	Bridgeport, CT	10 GWh	Mar 2015	Dec 2025	Natural Gas
Tyngsborough Solar	Citizens Enterprises Corporation	Tyngsborough, MA	3 GWh	Dec 2016	Dec 2025	Solar
Twiss Street Solar	Citizens Enterprises Corporation	Westfield, MA	2 GWh	Dec 2014	Mar 2025	Solar
Turnkey Landfill Gas Recovery	WM Renewable Energy LLC	Rochester, NH	39 GWh	Jan 1992	Dec 2025	Landfill Gas
Turners Falls	FirstLight Power Resources, Inc. - MA	Montague, MA	12 GWh	Dec 1904	Dec 2025	Water
Tunnel	FirstLight Power Resources Services LLC	Preston, CT	6 GWh	Dec 1918	Dec 2025	Water
True North	CD US Solar MT1 LLC	Salisbury, MA	6 GWh	Jul 2012	Dec 2025	Solar
Truck Stop	LSE Corona Austrina LLC	West Stockridge, MA	3 GWh	Oct 2017	Dec 2024	Solar
Trinity College Fuel Cell	Onsite Partners, LLC	Hartford, CT	12 GWh	Jul 2018	Dec 2024	Natural Gas

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