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	103.6 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 \| 57.4% Nuclear \| 24.9% Water \| 6.1% Other Fuel \| 4.5% Wind \| 3.5% 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
Dickinson Solar (CT)	Ecos Energy LLC	Hampton, CT	3 GWh	May 2020	Dec 2023	Solar
Sydney Solar	Ecos Energy LLC	Hampton, CT	3 GWh	May 2020	Dec 2023	Solar
Jackson Solar (CT)	Ecos Energy LLC	Griswold, CT	2 GWh	Nov 2019	Dec 2023	Solar
Sherman Solar	Ecos Energy LLC	Griswold, CT	2 GWh	Nov 2019	Dec 2023	Solar
Brookfield Wire Company	Dynamic Energy Solutions, LLC	Brookfield, MA	2 GWh	May 2016	Dec 2023	Solar
Middleton Solar Park	HG Solar Development, LLC	Middleton, MA	7 GWh	May 2018	Dec 2023	Solar
Battle Creek Solar	Ecos Energy LLC	Bennington, VT	4 GWh	Sep 2018	Dec 2023	Solar
VPPSA Project 10	Vermont Public Power Supply Authority	Swanton, VT	908 MWh	Apr 2010	Dec 2023	Distillate Fuel Oil
Hopkinton Phase 2	Vista Solar, Inc.	Ashaway, RI	4 GWh	Aug 2020	Dec 2023	Solar
Hopkins Hill CSG	Nautilus Solar Solutions	West Greenwich, RI	11 GWh	Oct 2020	Dec 2023	Solar
West Street Solar 1 LLC	AES Distributed Energy	Gardner, MA	8 GWh	Nov 2019	Dec 2023	Solar
Wilbur Woods Solar LLC	AES Distributed Energy	Orange, MA	8 GWh	Aug 2021	Dec 2023	Solar
W. Orange Rd Solar LLC	AES Distributed Energy	Orange, MA	7 GWh	Aug 2021	Dec 2023	Solar
Ryan Road Solar LLC Hybrid(CSG)	AES Distributed Energy	North Brookfield, MA	8 GWh	Nov 2021	Dec 2023	Solar
Lane Ave Solar LLC	AES Distributed Energy	North Brookfield, MA	2 GWh	Aug 2021	Dec 2023	Solar
Cronin Road Solar 1, LLC CSG Hybrid	AES Distributed Energy	Warren, MA	3 GWh	May 2020	Dec 2023	Solar : 99.7%
Goose Pond Solar	LSE Dorado, LLC	Southwick, MA	7 GWh	Dec 2019	Dec 2023	Solar
Syncarpha Northbridge II Hybrid CSG	Syncarpha Northbridge II, LLC	Whitinsville, MA	8 GWh	Mar 2021	Dec 2023	Solar
Syncarpha Northbridge I Hybrid(CSG)	Syncarpha Northbridge I, LLC	Whitinsville, MA	9 GWh	Nov 2021	Dec 2023	Solar
Syncarpha Northampton Hybrid CSG	Syncarpha Northampton, LLC	Northampton, MA	5 GWh	Nov 2020	Dec 2023	Solar
Syncarpha Blandford Hybrid CSG	Syncarpha Blandford, LLC	Blandford, MA	8 GWh	Nov 2019	Dec 2023	Solar
Syncarpha Millbury Hybrid (CSG)	Syncarpha Millbury, LLC	Millbury, MA	8 GWh	Sep 2022	Dec 2023	Solar
Syncarpha Halifax Hybrid CSG	Syncarpha Halifax, LLC	Halifax, MA	3 GWh	Nov 2020	Dec 2023	Solar : 99.0%
Syncarpha Leicester Hybrid CSG	Syncarpha Leicester, LLC	Leicester, MA	4 GWh	May 2021	Dec 2023	Solar : 99.5% Electricity used for energy storage : 0.5%
Syncarpha Westminster Hybrid CSG	Syncarpha Westminster, LLC	Westminster, MA	6 GWh	Oct 2022	Dec 2023	Solar
Syncarpha Tewksbury Hybrid CSG	Syncarpha Tewksbury, LLC	Tewksbury, MA	4 GWh	Jan 2022	Dec 2023	Solar
Kearsarge Gill	Kearsarge Gill LLC	Gill, MA	3 GWh	Dec 2017	Dec 2023	Solar
Town of Burrillville Solar CSG	Standard Solar	Burrillville, RI	4 GWh	Sep 2020	Dec 2023	Solar
West Brookfield Solar - Gilbertsville Rd (CSG)	Nautilus Solar Solutions	West Brookfield, MA	6 GWh	May 2017	Dec 2023	Solar
Hinsdale Solar PV	NSTAR Electric Company	Hinsdale, MA	3 GWh	Dec 2018	Dec 2023	Solar
Greenfield Solar PV	NSTAR Electric Company	Greenfield, MA	3 GWh	Dec 2018	Dec 2023	Solar
East Longmeadow Solar PV	NSTAR Electric Company	East Longmeadow, MA	6 GWh	Sep 2019	Dec 2023	Solar
Wareham Solar PV	NSTAR Electric Company	Wareham, MA	1 GWh	Nov 2018	Dec 2023	Solar
Adams Solar	Ecos Energy LLC	Lebanon, CT	1 GWh	Feb 2018	Dec 2023	Solar
Hamilton Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2023	Solar
Jefferson Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Dec 2017	Dec 2023	Solar
Wilson Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2023	Solar
Franklin Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2023	Solar
Saint Albans Solar	Cypress Creek Renewables	Georgia, VT	7 GWh	Sep 2018	Dec 2023	Solar
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2023	Natural Gas
Hope Farm Solar, LLC	Adapture Renewables, Inc.	Cranston, RI	16 GWh	Aug 2019	Dec 2023	Solar
IKEA New Haven Rooftop PV & Fuel Cell	IKEA Property Inc	New Haven, CT	2 GWh	Jun 2012	Dec 2023	Natural Gas : 67.0% Solar : 33.0%
Kearsarge Granby	Kearsarge Granby LLC	Granby, MA	4 GWh	Feb 2017	Dec 2023	Solar
Kearsarge Concord II	Kearsarge Concord II LLC	Concord, MA	7 GWh	Dec 2016	Dec 2023	Solar
Trinity College Fuel Cell	AEP Onsite Partners, LLC	Hartford, CT	9 GWh	Jul 2018	Dec 2023	Natural Gas
Town of Otis Wind Energy Project	Town of Otis	Otis, MA	3 GWh	Feb 2018	Dec 2023	Wind
Syncarpha Still River, LLC CSG	Syncarpha Still River, LLC	Bolton, MA	3 GWh	Nov 2016	Dec 2023	Solar
Syncarpha Hancock III CSG	Syncarpha Hancock III, LLC	Pittsfield, MA	2 GWh	Oct 2017	Dec 2023	Solar
Syncarpha Hancock II CSG	Syncarpha Hancock II, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2023	Solar
Syncarpha Hancock I CSG	Syncarpha Hancock I, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2023	Solar
East Acres Solar NG, LLC	NuGen Capital Management	Pittsfield, MA	5 GWh	Mar 2017	Dec 2023	Solar
Naval Sub Base New London Fuel Cell	Groton Station Fuel Cell, LLC	Groton, CT	34 GWh	Nov 2022	Dec 2023	Natural Gas
Randolph	Altus Power America Management, LLC	Randolph, MA	6 GWh	Oct 2017	Dec 2023	Solar
Solten Plainville 6000, LLC	Altus Power America Management, LLC	Plainville, MA	7 GWh	Jul 2017	Dec 2023	Solar
MA Solar Storage 1 Hybrid	Origis Energy USA, Inc	Sterling, MA	1 GWh	Feb 2018	Dec 2023	Solar
Barrett Farm Solar - Phase I	Onyx Asset Services Group	Thompson, CT	3 GWh	Sep 2017	Dec 2023	Solar
Onyx - Brockton Thatcher Landfill Solar CSG	Onyx Asset Services Group	Brockton, MA	4 GWh	Oct 2017	Dec 2023	Solar
Onyx - Pembroke Landfill Solar	Onyx Asset Services Group	Pembroke, MA	4 GWh	Nov 2017	Dec 2023	Solar
Sikorsky Aircraft CHP	Sikorsky Aircraft Corporation	Stratford, CT	64 GWh	May 2010	Dec 2023	Natural Gas : 99.9%
Greater New Bedford LFG Utiliz. Facility	CommonWealth New Bedford Energy LLC	New Bedford, MA	20 GWh	Sep 2005	Dec 2023	Landfill Gas
Texon Hydroelectric Project	Hitchcock Hydro, LLC	Russell, MA	6 GWh	Dec 1981	Dec 2023	Water
DG Webster LLC CSG	DG Webster, LLC	Webster, MA	2 GWh	Nov 2017	Dec 2023	Solar
DG Tufts Knoll LLC CSG	DG Tufts Knoll, LLC	North Grafton, MA	3 GWh	Jul 2017	Dec 2023	Solar
DG Dighton LLC CSG	DG Dighton, LLC	Dighton, MA	6 GWh	Jun 2017	Dec 2023	Solar
DG Tufts Science LLC CSG	DG Tufts Science, LLC	North Grafton, MA	1 GWh	Jan 2017	Dec 2023	Solar
Antanavica Solar	Cypress Creek Renewables	Leicester, MA	1 GWh	Jul 2018	Dec 2023	Solar
Peterson Road Solar	Peterson Road Solar, LLC	Palmer, MA	4 GWh	Mar 2017	Dec 2023	Solar
Sampson Road Community Solar	Sampson Road Solar, LLC	Charlton, MA	3 GWh	Nov 2017	Dec 2023	Solar
Golden Hills Solar	Golden Hills Solar, LLC	Rutland, MA	8 GWh	Aug 2017	Dec 2023	Solar
Next Generation Solar Farm	Cypress Creek Renewables	New Haven, VT	4 GWh	Nov 2017	Dec 2023	Solar
Grafton PV	MN8 Energy LLC	Grafton, MA	4 GWh	Sep 2016	Dec 2023	Solar
Barrett PV	MN8 Energy LLC	Oxford, MA	17 GWh	Oct 2016	Dec 2023	Solar
MDFA Devens-Saratoga	Terraform Arcadia	Devens, MA	3 GWh	Feb 2016	Dec 2023	Solar
Smith & Wesson at Springfield MA PV	Luminace Solar Massachusetts, LLC	Springfield, MA	2 GWh	Jun 2017	Dec 2023	Solar
Centaurus Solar - MA	LSE Centaurus LLC	Ashland, MA	4 GWh	Oct 2016	Dec 2023	Solar
Kearsarge Bellingham PV	Kearsarge Bellingham LLC	Bellingham, MA	5 GWh	Nov 2016	Dec 2023	Solar
Canis Major Solar Farm	LSE Canis Major LLC	Suffield, CT	4 GWh	Nov 2016	Dec 2023	Solar
Ashby Duffy CSG Solar Farm	LSE Cassiopeia LLC	Ashby, MA	3 GWh	Nov 2017	Dec 2023	Solar
Canis Minor Solar Farm	LSE Canis Minor LLC	Barkhamsted, CT	2 GWh	Nov 2016	Dec 2023	Solar
West Boylston Community Shared Solar	Town of West Boylston - (MA)	West Boylston, MA	2 GWh	Nov 2016	Dec 2023	Solar
Big George PV CSG	Altus Power America Management, LLC	Plymouth, MA	1 GWh	Aug 2018	Dec 2023	Solar
IOS - MEW Phase 1	IGS ORIX Solar I, LLC	Madison, ME	5 GWh	Dec 2016	Dec 2023	Solar
North Smithfield Solar Power 1	AEP Onsite Partners, LLC	North Smithfield, RI	919 MWh	Nov 2018	Dec 2023	Solar
301 Chestnut Solar NG	NuGen Capital Management	East Longmeadow, MA	2 GWh	Mar 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
WED Kingstown Solar I - East Array	CleanCapital Holdings	Washington, RI	4 GWh	Nov 2017	Dec 2023	Solar
WED Stilson Solar	CleanCapital Holdings	Richmond, RI	3 GWh	Nov 2017	Dec 2023	Solar
WED Kingstown Solar I, LLC - West	CleanCapital Holdings	Richmond, RI	2 GWh	Nov 2017	Dec 2023	Solar
UMASS	Consolidated Edison Development Inc.	Amherst, MA	941 MWh	Sep 2016	Dec 2023	Solar
CED Chicopee Solar	Consolidated Edison Development Inc.	Chicopee, MA	5 GWh	Jun 2017	Dec 2023	Solar
Tyngsborough Solar	Citizens Enterprises Corporation	Tyngsborough, MA	4 GWh	Dec 2016	Dec 2023	Solar
Norton Landfill Solar	Citizens Enterprises Corporation	Norton, MA	2 GWh	Dec 2016	Dec 2023	Solar
Citizens Agawam Landfill Solar	Citizens Enterprises Corporation	Agawam, MA	3 GWh	Mar 2017	Dec 2023	Solar
DG Haverhill CSG	DG Haverhill	Haverhill, MA	2 GWh	Aug 2017	Dec 2023	Solar
Weston Landfill Solar	Ameresco, Inc - Weston	Weston, MA	3 GWh	Feb 2016	Dec 2023	Solar
Braintree Landfill Solar	Ameresco, Inc - Braintree	Braintree, MA	1 GWh	Nov 2014	Dec 2023	Solar
GELD Solar Farm	Ameresco, Inc - GELD	Groton, MA	3 GWh	May 2016	Dec 2023	Solar
Town of Rocky Hill PV CSG	Tesla Inc.	Rocky Hill, CT	5 GWh	Feb 2018	Dec 2023	Solar
Falmouth Landfill Solar	Citizens Enterprises Corporation	Falmouth, MA	5 GWh	Mar 2017	Dec 2023	Solar
DG Foxborough Elm CSG	DG Foxborough Elm	Foxborough, MA	4 GWh	Jul 2017	Dec 2023	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	742.1 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.1 TWh	85
#13	Duke Energy Carolinas	111.3 TWh	556
#17	Duke Energy Progress East	65.3 TWh	554
#52	Duke Energy Progress West	4.2 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.0 TWh	20
#12	New York Independent System Operator	130.9 TWh	1,100
#1	PJM Interconnection, LLC	859.4 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	189.5 TWh	1,943
#8	Tennessee Valley Authority	158.9 TWh	170
#10	Florida Power & Light Co.	148.5 TWh	159
#12	New York Independent System Operator	130.9 TWh	1,100
#13	Duke Energy Carolinas	111.3 TWh	556
#15	ISO New England	103.6 TWh	1,487
#16	Bonneville Power Administration	83.0 TWh	158
#17	Duke Energy Progress East	65.3 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.5 TWh	45
#19	PacifiCorp East	57.0 TWh	204