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 Authority	ISO New England
States	Connecticut Maine Massachusetts New Hampshire New York Rhode Island Vermont
Last Update	May 2025
Annual Generation	103.5 TWh
Power Plants	1,487
Utilities	782
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 \| 57.5% Nuclear \| 24.6% Water \| 6.1% Other Fuel \| 4.5% Wind \| 3.6% Solar \| 1.4% Coal \| 0.3%

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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
West A&B Solar Project Hybrid CSG	AES Distributed Energy	Southbridge, MA	5 GWh	Nov 2020	Dec 2023	Solar
Wesleyan University Cogen 1	Wesleyan University	Middletown, CT	10 GWh	Jan 2009	Dec 2023	Natural Gas
Wells (ME)	Nautilus Solar Solutions	Wells, ME	8 GWh	Jun 2022	Dec 2023	Solar
Wellesley College Central Utility Plant	Wellesley College	Wellesley, MA	480 MWh	May 1985	Dec 2023	Natural Gas
WED Stilson Solar	CleanCapital Holdings	Richmond, RI	3 GWh	Nov 2017	Dec 2023	Solar
WED Shun III, LLC	WED Shun III, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2023	Wind
WED Shun II, LLC	WED Shun II, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2023	Wind
WED Shun I, LLC	WED Shun I, LLC	Johnston, RI	7 GWh	Dec 2018	Mar 2025	Wind
WED Portsmouth One, LLC	Greenbacker Renewable Energy Corporation	Portsmouth, RI	4 GWh	Jul 2016	Dec 2023	Wind
WED Plainfield, LLC	WED Plainfield, LLC	Johnston, RI	5 GWh	Dec 2018	Dec 2023	Wind
WED Plainfield III, LLC	WED Plainfield III, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2023	Wind
WED Plainfield II, LLC	WED Plainfield II, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2023	Wind
WED NK Green	WED NK Green LLC	North Kingstown, RI	2 GWh	Feb 2012	Dec 2023	Wind
WED Kingstown Solar I, LLC - West	CleanCapital Holdings	Richmond, RI	2 GWh	Nov 2017	Dec 2023	Solar
WED Kingstown Solar I - East Array	CleanCapital Holdings	Washington, RI	4 GWh	Nov 2017	Dec 2023	Solar
WED GW Solar, LLC	WED GW Solar, LLC CSG	Lincoln, RI	4 GWh	Dec 2018	Dec 2023	Solar
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	7 GWh	Dec 2018	Mar 2025	Wind
WED Coventry Seven, LLC	WED Coventry Seven, LLC	Coventry, RI	5 GWh	Nov 2020	Dec 2023	Solar
WED Coventry 6	Greenbacker Renewable Energy Corporation	Coventry, RI	7 GWh	Jul 2016	Mar 2025	Wind
WED Coventry 5	Greenbacker Renewable Energy Corporation	Coventry, RI	2 GWh	Feb 2017	Dec 2023	Wind
WED Coventry 4	WED Coventry Four, LLC	Coventry, RI	2 GWh	Jul 2016	Dec 2023	Wind
WED Coventry 3	WED Coventry Three, LLC	Coventry, RI	2 GWh	Jul 2016	Dec 2023	Wind
WED Coventry 2	WED Coventry Two, LLC	Coventry, RI	8 GWh	Jul 2016	Mar 2025	Wind
WED Coventry 1	WED Coventry One, LLC	Coventry, RI	2 GWh	Sep 2016	Dec 2023	Wind
Webster Solar	Webster Solar, LLC	Webster, MA	1 GWh	Nov 2017	Dec 2023	Solar
Webb Road Solar	NextGrid Mastic, LLC	Waterville, ME	5 GWh	Aug 2022	Dec 2023	Solar
WEB Brookfield	WEB Brookfield Solar LLC	Brookfield, MA	6 GWh	Nov 2021	Dec 2023	Solar
Weaver Wind	Weaver Wind, LLC (Longroad)	Township 16, ME	212 GWh	Nov 2020	Mar 2025	Wind
Watertown Solar One, LLC	DG Connecticut III, LLC	Watertown, CT	3 GWh	May 2021	Dec 2023	Solar
Waterside Power, LLC	Waterside Power, LLC	Stamford, CT	2 GWh	May 2003	Dec 2023	Distillate Fuel Oil
Waters River	City of Peabody - (MA)	Peabody, MA	4 GWh	Nov 1971	Dec 2023	Natural Gas : 76.6% Distillate Fuel Oil : 23.4%
Waterbury Generation	Engie North America	Waterbury, CT	40 GWh	May 2009	Dec 2023	Natural Gas : 99.7%
Waterbury 22	Green Mountain Power Corp	Waterbury, VT	16 GWh	May 1953	Dec 2023	Water
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	303 MWh	Sep 2010	Mar 2025	Distillate Fuel Oil
Water Street Solar	AES Distributed Energy	Randolph, ME	6 GWh	Nov 2022	Dec 2023	Solar
Waste Water Treatment Plant	City of Pittsfield	Pittsfield, MA	763 MWh	Dec 2011	Dec 2022	Solar
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	20 GWh	Feb 2009	Dec 2023	Landfill Gas
Washington WS01	Nautilus Solar Solutions	Washington, ME	6 GWh	May 2022	Dec 2023	Solar
Washburn Road Solar	REA Investments, LLC	Freetown, MA	3 GWh	Nov 2018	Dec 2023	Solar
Wareham Solar PV	NSTAR Electric Company	Wareham, MA	1 GWh	Nov 2018	Dec 2023	Solar
Wareham MA 1 Community Solar	Navisun LLC	Wareham, MA	3 GWh	Aug 2016	Dec 2023	Solar
Ware Palmer Road Solar LLC CSG	Ware Palmer Road Solar LLC	Ware, MA	4 GWh	May 2021	Dec 2023	Solar
Walpole Solar 2	Walpole Solar 2, LLC	Walpole, MA	4 GWh	Mar 2014	Dec 2023	Solar
Wallingford Solar	Wallingford Renewable Energy, LLC	Wallingford, CT	22 GWh	Aug 2021	Dec 2023	Solar
Wallingford Energy	Wallingford Energy LLC	Wallingford, CT	161 GWh	Jul 2001	Dec 2023	Natural Gas
Wachusett Solar	Wachusett Solar, LLC	Rutland, MA	3 GWh	Jul 2019	Dec 2023	Solar
W. Orange Rd Solar LLC	AES Distributed Energy	Orange, MA	7 GWh	Aug 2021	Dec 2023	Solar
W K Sanders	Village of Morrisville - (VT)	Hyde Park, VT	915 MWh	Jun 1983	Dec 2023	Water
Vuelta Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2023	Solar
VPPSA Project 10	Vermont Public Power Supply Authority	Swanton, VT	908 MWh	Apr 2010	Dec 2023	Distillate Fuel Oil
Vernon Dam	Great River Hydro, LLC	Vernon, VT	191 GWh	Jul 1909	Dec 2023	Water
Vergennes 9	Green Mountain Power Corp	Vergennes, VT	12 GWh	Dec 1911	Dec 2023	Water
Ventura	Ventura Drive Dartmouth Solar 1, LLC	Dartmouth, MA	2 GWh	May 2022	Dec 2023	Solar
VEC Magee Hill Solar	SoCore Energy LLC	Hinesburgh, VT	2 GWh	Oct 2017	Dec 2023	Solar
VEC Alburgh Array	SoCore Energy LLC	Alburgh, VT	1 GWh	Nov 2016	Dec 2023	Solar
Upton Community Solar	Upton Solar, LLC	Upton, MA	3 GWh	Aug 2017	Dec 2023	Solar
Upper Blackstone (MA) Treasure Valley	Nexamp Treasure Valley Solar, LLC	Rutland, MA	7 GWh	Jun 2014	Dec 2023	Solar
Upper Barker	KEI (Maine) Power Management (III) LLC	Auburn, ME	7 GWh	Apr 1987	Dec 2023	Water
University Solar, LLC	AES Distributed Energy	West Greenwich, RI	27 GWh	Nov 2019	Mar 2025	Solar
Univ of Massachusetts Medical Center	University of Massachusetts Medical	Worcester, MA	68 GWh	Mar 1974	Dec 2023	Natural Gas : 97.4% Residual Fuel Oil : 2.4%
Unity Solar	Madison Energy Holdings LLC	Unity, ME	7 GWh	Nov 2021	Dec 2023	Solar
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	50 GWh	Aug 2006	Mar 2025	Landfill Gas : 75.0% Natural Gas : 23.3% Distillate Fuel Oil : 1.8%
UMass PV Lot 22	Consolidated Edison Development Inc.	Amherst, MA	3 GWh	Aug 2022	Dec 2023	Solar
UMass Boston	UMass Boston	Dorchester, MA	659 MWh	Dec 1971	Dec 2023	Solar : 91.2% Distillate Fuel Oil : 8.8%
UMASS	Consolidated Edison Development Inc.	Amherst, MA	941 MWh	Sep 2016	Dec 2023	Solar
UI RCP Woodbridge FC	United Illuminating Co	Woodbridge, CT	16 GWh	Nov 2016	Dec 2023	Natural Gas
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	14 GWh	Jul 2015	Mar 2025	Natural Gas
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	20 GWh	Oct 2015	Mar 2025	Natural Gas : 88.4% Solar : 11.6%
UDR Glastonbury Fuel Cell	UIL Distributed Resources, LLC	Glastonbury, CT	21 GWh	Jan 2016	Dec 2023	Natural Gas
UCONN Cogen Facility	University of Connecticut	Storrs, CT	124 GWh	Feb 2006	Mar 2025	Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
UB Fuel Cell	UB Fuel Cell	Bridgeport, CT	10 GWh	Mar 2015	Dec 2023	Natural Gas
Tyngsborough Solar	Citizens Enterprises Corporation	Tyngsborough, MA	4 GWh	Dec 2016	Dec 2023	Solar
Twiss Street Solar	Citizens Enterprises Corporation	Westfield, MA	2 GWh	Dec 2014	Dec 2023	Solar
Turnkey Landfill Gas Recovery	WM Renewable Energy LLC	Rochester, NH	45 GWh	Jan 1992	Dec 2023	Landfill Gas
Turners Falls	FirstLight Power Resources, Inc. - MA	Montague, MA	14 GWh	Dec 1904	Dec 2023	Water
Tunnel	FirstLight Power Resources Services LLC	Preston, CT	12 GWh	Dec 1918	Dec 2023	Water : 98.2% Jet Fuel : 1.8%
True North	CD US Solar MT1 LLC	Salisbury, MA	7 GWh	Jul 2012	Dec 2023	Solar
Truck Stop	Strata Manager, LLC	West Stockridge, MA	3 GWh	Oct 2017	Dec 2023	Solar
Trinity College Fuel Cell	AEP Onsite Partners, LLC	Hartford, CT	9 GWh	Jul 2018	Dec 2023	Natural Gas
Treasure Lane Solar 1	AES Clean Energy	Manchester, ME	1 GWh	Apr 2023	Dec 2023	Solar
TPE King Solar Holdings1, LLC (CSG)	Nautilus Solar Solutions	North Smithfield, RI	19 GWh	Mar 2022	Dec 2023	Solar
TPE Hopkins Solar Holdings1, LLC	Nautilus Solar Solutions	West Greenwhich, RI	10 GWh	Oct 2020	Dec 2022	Solar
Townline Community Solar	AES Distributed Energy	Batavia, NY	7 GWh	Jan 2022	Dec 2023	Solar
Town of Ware - Canadian Tree(CSG)	MA CS Ware West, LLC	Ware, MA	2 GWh	Nov 2021	Dec 2023	Solar
Town of Uxbridge MA at Commerce Dr	Luminace Solar Net Metering, LLC	Uxbridge, MA	3 GWh	May 2012	Dec 2023	Solar
Town of Rocky Hill PV CSG	Tesla Inc.	Rocky Hill, CT	5 GWh	Feb 2018	Dec 2023	Solar
Town of Otis Wind Energy Project	Town of Otis	Otis, MA	3 GWh	Feb 2018	Dec 2023	Wind
Town of Norfolk MA at Medway Branch	Luminace Solar Massachusetts, LLC	Norfolk, MA	2 GWh	May 2012	Dec 2023	Solar
Town of Needham VNEM CSG	Tesla Inc.	Needham, MA	4 GWh	Jan 2016	Dec 2023	Solar
Town of Lexington Solar	Syncarpha Lexington, LLC	Lexington, MA	2 GWh	Apr 2017	Dec 2023	Solar
Town of Halfmoon	Tesla Inc.	Waterford, NY	1 GWh	May 2017	Dec 2023	Solar
Town of Foxborough - Landfill (SREC II) CSG	Town of Foxborough - Landfill (SREC II)	Foxborough, MA	2 GWh	Jul 2017	Dec 2023	Solar
Town of East Bridgewater CSG	Tesla Inc.	East Bridgewater, MA	1 GWh	May 2013	Dec 2023	Solar
Town of Burrillville Solar CSG	Standard Solar	Burrillville, RI	4 GWh	Sep 2020	Dec 2023	Solar
Town of Branford	Tesla Inc.	Branford, CT	2 GWh	May 2018	Dec 2023	Solar
Town of Amherst Solar	Town of Amherst Solar, LLC	Amherst, MA	4 GWh	Jul 2022	Dec 2023	Solar
Town House	Nautilus Solar Solutions	Chelsea, ME	8 GWh	Nov 2022	Dec 2023	Solar
Torrington Terminal	Connecticut Jet Power LLC	Torrington, CT	67 MWh	Oct 1967	Dec 2023	Kerosene
Torrington Solar One, LLC	DG Connecticut III, LLC	Torrington, CT	3 GWh	Feb 2021	Dec 2023	Solar
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2023	Natural Gas

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	729.4 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.2 TWh	85
#13	Duke Energy Carolinas	111.6 TWh	556
#17	Duke Energy Progress East	65.4 TWh	554
#52	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.8 TWh	20
#12	New York Independent System Operator	130.8 TWh	1,100
#1	PJM Interconnection, LLC	860.0 TWh	2,305
#29	South Carolina Public Service Authority	19.3 TWh	33
#60	Southeastern Power Administration	1.4 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	189.8 TWh	1,943
#8	Tennessee Valley Authority	159.0 TWh	170
#10	Florida Power & Light Co.	148.4 TWh	159
#12	New York Independent System Operator	130.8 TWh	1,100
#13	Duke Energy Carolinas	111.6 TWh	556
#15	ISO New England	103.5 TWh	1,487
#16	Bonneville Power Administration	82.6 TWh	158
#17	Duke Energy Progress East	65.4 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.6 TWh	45
#19	PacifiCorp East	57.2 TWh	204