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	Oct 2026
Annual Generation	112.2 TWh
Power Plants	1,667
Utilities	846
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% Nuclear \| 25.3% Wind \| 5.7% Water \| 4.6% Other Fuel \| 4.5% Solar \| 1.6% Coal \| 0%

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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
Sutton Solar CSG	Sutton Solar, LLC	Sutton, MA	3 GWh	Oct 2016	Dec 2025	Solar
Nexamp Peak CSG	Nexamp Peak, LLC	Hancock, MA	2 GWh	Nov 2015	Dec 2025	Solar
Stafford MS Ground Mount Community Solar	Town of Stafford - (CT)	Stafford, CT	3 GWh	Jun 2016	Dec 2025	Solar
Mt. Tom Solar Project Hybrid	Mt. Tom Solar, LLC	Holyoke, MA	4 GWh	Dec 2016	Dec 2025	Solar
Northampton Landfill Solar PV	Ameresco Glendale Road Solar PV LLC	Northampton, MA	2 GWh	Oct 2017	Dec 2025	Solar
Cold River Road Solar	Onsite Partners, LLC	North Clarendon, VT	3 GWh	Nov 2016	Dec 2025	Solar
VEC Magee Hill Solar	SoCore Energy LLC	Hinesburgh, VT	2 GWh	Oct 2017	Dec 2025	Solar
AIS Solar Project	Terraform Arcadia	Leominster, MA	3 GWh	Nov 2016	Dec 2025	Solar
WED Portsmouth One, LLC	Greenbacker Renewable Energy Corporation	Portsmouth, RI	5 GWh	Jul 2016	Dec 2025	Wind
Redbrook Community Solar 1	Redbrook Solar 1, LLC	Plympton, MA	1 GWh	Sep 2017	Dec 2025	Solar
Brook Street Solar 1 CSG	Brook Street Solar 1, LLC	Plympton, MA	3 GWh	Jul 2017	Dec 2025	Solar
Spring Street Solar 1 CSG	Spring Street Solar 1, LLC	Carver, MA	3 GWh	Feb 2017	Dec 2025	Solar
Bullock Road Solar 1	Bullock Road Solar 1, LLC	Freetown, MA	4 GWh	Jun 2018	Dec 2025	Solar
Stafford St Solar 1 CSG	Stafford St Solar 1, LLC	Leicester, MA	3 GWh	Nov 2017	Dec 2025	Solar
Stafford St 2 Community Solar	Stafford St Solar 2, LLC	Lecister, MA	3 GWh	Apr 2018	Dec 2025	Solar
Stafford St Solar 3 CSG	Stafford St Solar 3, LLC	Leicester, MA	2 GWh	Nov 2017	Dec 2025	Solar
BWC Wading River One, Two, Three CSG	Ameresco BWC Wading River LLC	Mendon, MA	2 GWh	Oct 2017	Dec 2025	Solar
Syncarpha Freetown	Marie's Way Solar I, LLC	Freetown, MA	6 GWh	Oct 2016	Dec 2025	Solar
Elizabeth Mines Solar 1	Elizabeth Mines Solar 1, LLC	So. Strafford, VT	7 GWh	Oct 2017	Dec 2025	Solar
Nebraska Valley Solar Farm	Town of Stowe - (VT)	Stowe, VT	1 GWh	Jul 2016	Dec 2025	Solar
Onset East Community Solar Facility	Kearsarge Onset LLC	Wareham, MA	2 GWh	Mar 2016	Dec 2025	Solar
Onset West Community Solar Facility	Kearsarge Onset LLC	Wareham, MA	2 GWh	Mar 2016	Dec 2025	Solar
Boston Medical Center CHP Plant	Boston Medical Center	Boston, MA	14 GWh	Mar 2017	Dec 2025	Natural Gas
433 Purchase Solar NG, LLC	NuGen Capital Management	Swansea, MA	4 GWh	Mar 2012	Dec 2025	Solar
Old Wardour Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2025	Solar
Shuman Solar	NuGen Capital Management	Stoughton, MA	2 GWh	Mar 2016	Dec 2025	Solar
Vuelta Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2025	Solar
Farley Road Community Solar	Farley Road Solar, LLC	Dudley, MA	2 GWh	Jul 2017	Dec 2025	Solar
Belchertown Renewables Community Solar	Belchertown Renewables, LLC	Belchertown, MA	6 GWh	Feb 2018	Dec 2025	Solar
Theodore Drive Community Solar	Theodore Drive Solar, LLC	Westminster, MA	2 GWh	Feb 2018	Dec 2025	Solar
Upton Community Solar	Upton Solar, LLC	Upton, MA	3 GWh	Aug 2017	Dec 2025	Solar
Pleasantdale Road Community Solar	Pleasantdale Road Solar, LLC	Rutland, MA	1 GWh	Aug 2017	Dec 2025	Solar
Hatfield Renewables Community Solar	Hatfield Renewables, LLC	Hatfield, MA	3 GWh	Aug 2017	Dec 2025	Solar
Peterson Road Solar	Peterson Road Solar, LLC	Palmer, MA	4 GWh	Mar 2017	Dec 2025	Solar
Sampson Road Community Solar	Sampson Road Solar, LLC	Charlton, MA	3 GWh	Nov 2017	Dec 2025	Solar
Golden Hills Solar	Golden Hills Solar, LLC	Rutland, MA	7 GWh	Aug 2017	Dec 2025	Solar
Next Generation Solar Farm	Cypress Creek Renewables	New Haven, VT	4 GWh	Nov 2017	Dec 2025	Solar
Grafton PV	MN8 Energy LLC	Grafton, MA	4 GWh	Sep 2016	Dec 2025	Solar
Barrett PV	MN8 Energy LLC	Oxford, MA	17 GWh	Oct 2016	Dec 2025	Solar
MDFA Devens-Saratoga	Terraform Arcadia	Devens, MA	3 GWh	Feb 2016	Dec 2025	Solar
Smith & Wesson at Springfield MA PV	Luminace Solar Massachusetts, LLC	Springfield, MA	2 GWh	Jun 2017	Dec 2025	Solar
Centaurus Solar - MA	LSE Centaurus LLC	Ashland, MA	3 GWh	Oct 2016	Dec 2025	Solar
Kearsarge Bellingham PV	Kearsarge Bellingham LLC	Bellingham, MA	5 GWh	Nov 2016	Dec 2025	Solar
Canis Major Solar Farm	LSE Canis Major LLC	Suffield, CT	3 GWh	Nov 2016	Dec 2025	Solar
Ashby Duffy CSG Solar Farm	LSE Cassiopeia LLC	Ashby, MA	3 GWh	Nov 2017	Dec 2025	Solar
Canis Minor Solar Farm	LSE Canis Minor LLC	Barkhamsted, CT	2 GWh	Nov 2016	Dec 2025	Solar
West Boylston Community Shared Solar	Town of West Boylston - (MA)	West Boylston, MA	447 MWh	Nov 2016	Dec 2025	Solar
Big George PV CSG	Altus Power America Management, LLC	Plymouth, MA	1 GWh	Aug 2018	Dec 2025	Solar
IOS - MEW Phase 1	Madison Energy Holdings LLC	Madison, ME	5 GWh	Dec 2016	Dec 2025	Solar
North Smithfield Solar Power 1	Onsite Partners, LLC	North Smithfield, RI	2 GWh	Nov 2018	Dec 2025	Solar
301 Chestnut Solar NG	NuGen Capital Management	East Longmeadow, MA	2 GWh	Mar 2017	Dec 2025	Solar
Antanavica Solar	SunStrong Management, LLC	Leicester, MA	1 GWh	Jul 2018	Dec 2025	Solar
Weston Landfill Solar	Ameresco, Inc - Weston	Weston, MA	3 GWh	Feb 2016	Dec 2025	Solar
Braintree Landfill Solar	Ameresco, Inc - Braintree	Braintree, MA	1 GWh	Nov 2014	Dec 2025	Solar
GELD Solar Farm	Ameresco, Inc - GELD	Groton, MA	3 GWh	May 2016	Dec 2025	Solar
Town of Rocky Hill PV CSG	Tesla Inc.	Rocky Hill, CT	5 GWh	Feb 2018	Dec 2025	Solar
DG Haverhill CSG	DG Haverhill LLC	Haverhill, MA	7 GWh	Aug 2017	Dec 2025	Solar
DG Crystal Spring CSG	DG Crystal Spring LLC	Mattapoisett, MA	7 GWh	Jun 2017	Dec 2025	Solar
Falmouth Landfill Solar	Citizens Enterprises Corporation	Falmouth, MA	5 GWh	Mar 2017	Dec 2025	Solar
DG Foxborough Elm CSG	DG Foxborough Elm LLC	Foxborough, MA	3 GWh	Jul 2017	Dec 2025	Solar
Town of Foxborough - Landfill (SREC II)	Town of Foxborough - Landfill (SREC II)	Foxborough, MA	2 GWh	Jul 2017	Dec 2025	Solar
Citizens Agawam Landfill Solar	Citizens Enterprises Corporation	Agawam, MA	3 GWh	Mar 2017	Dec 2025	Solar
Norton Landfill Solar	Citizens Enterprises Corporation	Norton, MA	2 GWh	Dec 2016	Dec 2025	Solar
Tyngsborough Solar	Citizens Enterprises Corporation	Tyngsborough, MA	3 GWh	Dec 2016	Dec 2025	Solar
CED Chicopee Solar	RWE Clean Energy	Chicopee, MA	5 GWh	Jun 2017	Dec 2025	Solar
UMASS	RWE Clean Energy	Amherst, MA	5 GWh	Sep 2016	Dec 2025	Solar
WED Kingstown Solar I, LLC - West	CleanCapital Holdings	Richmond, RI	2 GWh	Nov 2017	Dec 2025	Solar
WED Stilson Solar	CleanCapital Holdings	Richmond, RI	3 GWh	Nov 2017	Dec 2025	Solar
WED Kingstown Solar I - East Array	CleanCapital Holdings	Washington, RI	5 GWh	Nov 2017	Dec 2025	Solar
West Brookfield Solar - Gilbertsville Rd	Nautilus Solar Solutions	West Brookfield, MA	5 GWh	May 2017	Dec 2025	Solar
DG Tufts Science LLC CSG	DG Tufts Science, LLC	North Grafton, MA	1 GWh	Jan 2017	Dec 2025	Solar
DG Dighton LLC CSG	DG Dighton, LLC	Dighton, MA	5 GWh	Jun 2017	Dec 2025	Solar
DG Tufts Knoll LLC CSG	DG Tufts Knoll, LLC	North Grafton, MA	3 GWh	Jul 2017	Dec 2025	Solar
DG Webster LLC CSG	DG Webster, LLC	Webster, MA	2 GWh	Nov 2017	Dec 2025	Solar
Texon Hydroelectric Project	Hitchcock Hydro, LLC	Russell, MA	4 GWh	Dec 1981	Dec 2025	Water
Greater New Bedford LFG Utiliz. Facility	CommonWealth New Bedford Energy LLC	New Bedford, MA	13 GWh	Sep 2005	Dec 2025	Landfill Gas
Sikorsky Aircraft CHP	Sikorsky Aircraft Corporation	Stratford, CT	65 GWh	May 2010	Dec 2025	Natural Gas : 99.9%
Onyx - Pembroke Landfill Solar	Onyx Asset Services Group	Pembroke, MA	3 GWh	Nov 2017	Dec 2025	Solar
Onyx - Brockton Thatcher Landfill Solar	Onyx Asset Services Group	Brockton, MA	5 GWh	Oct 2017	Dec 2025	Solar
Barrett Farm Solar - Phase I	Onyx Asset Services Group	Thompson, CT	3 GWh	Sep 2017	Dec 2025	Solar
MA Solar Storage 1 Hybrid	Origis Energy USA, Inc	Sterling, MA	1 GWh	Feb 2018	Dec 2025	Solar
Solten Plainville 6000, LLC	Altus Power America Management, LLC	Plainville, MA	7 GWh	Jul 2017	Dec 2025	Solar
Randolph	Altus Power America Management, LLC	Randolph, MA	6 GWh	Oct 2017	Dec 2025	Solar
Naval Sub Base New London Fuel Cell	Groton Station Fuel Cell, LLC	Groton, CT	30 GWh	Nov 2022	Dec 2025	Natural Gas
East Acres Solar NG, LLC	NuGen Capital Management	Pittsfield, MA	5 GWh	Mar 2017	Dec 2025	Solar
Syncarpha Hancock I CSG	Syncarpha Hancock I, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2025	Solar
Syncarpha Hancock II CSG	Syncarpha Hancock II, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2025	Solar
Syncarpha Hancock III CSG	Syncarpha Hancock III, LLC	Pittsfield, MA	1 GWh	Oct 2017	Dec 2025	Solar
Syncarpha Still River, LLC CSG	Syncarpha Still River, LLC	Bolton, MA	4 GWh	Nov 2016	Dec 2025	Solar
Town of Otis Wind Energy Project	Town of Otis - (MA)	Otis, MA	4 GWh	Feb 2018	Dec 2025	Wind
Trinity College Fuel Cell	Onsite Partners, LLC	Hartford, CT	11 GWh	Jul 2018	Dec 2025	Natural Gas
Kearsarge Concord II	Kearsarge Concord II LLC	Concord, MA	7 GWh	Dec 2016	Dec 2025	Solar
Kearsarge Granby	Kearsarge Granby LLC	Granby, MA	4 GWh	Feb 2017	Dec 2025	Solar
IKEA New Haven Rooftop PV & Fuel Cell	IKEA Property Inc	New Haven, CT	3 GWh	Jun 2012	Dec 2025	Natural Gas : 71.5% Solar : 28.5%
Hope Farm Solar, LLC	Adapture Renewables, Inc.	Cranston, RI	16 GWh	Aug 2019	Dec 2025	Solar
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2025	Natural Gas
Saint Albans Solar	Cypress Creek Renewables	Georgia, VT	7 GWh	Sep 2018	Dec 2025	Solar
Franklin Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2025	Solar
Wilson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2025	Solar
Jefferson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Dec 2017	Dec 2025	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	433.0 GWh	4
#24	Dominion Energy South Carolina, Inc.	26.1 TWh	83
#13	Duke Energy Carolinas	113.4 TWh	578
#17	Duke Energy Progress East	66.2 TWh	574
#50	Duke Energy Progress West	4.6 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	34.2 TWh	25
#12	New York Independent System Operator	134.1 TWh	1,334
#1	PJM Interconnection, LLC	890.9 TWh	2,806
#28	South Carolina Public Service Authority	19.6 TWh	35
#59	Southeastern Power Administration	1.2 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	168.7 TWh	2,170
#9	Tennessee Valley Authority	166.2 TWh	209
#10	Florida Power & Light Co.	153.0 TWh	188
#12	New York Independent System Operator	134.1 TWh	1,334
#13	Duke Energy Carolinas	113.4 TWh	578
#15	ISO New England	112.2 TWh	1,667
#16	Bonneville Power Administration	91.1 TWh	170
#17	Duke Energy Progress East	66.2 TWh	574
#18	PacifiCorp East	61.4 TWh	223
#19	Salt River Project Agricultural Improvement and Power District	60.5 TWh	51