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	Nov 2025
Annual Generation	105.5 TWh
Power Plants	1,577
Utilities	819
Ranked #15 out of 65 in terms of net annual generation
Ranked #12 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 55.8% Nuclear \| 26% Water \| 5% Other Fuel \| 4.4% Wind \| 4% Solar \| 1.5% Coal \| 0.4%

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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
Syncarpha Freetown	Marie's Way Solar I, LLC	Freetown, MA	6 GWh	Oct 2016	Dec 2024	Solar
Barrett PV	MN8 Energy LLC	Oxford, MA	20 GWh	Oct 2016	Dec 2024	Solar
Centaurus Solar - MA	LSE Centaurus LLC	Ashland, MA	3 GWh	Oct 2016	Dec 2024	Solar
WED Coventry 1	WED Coventry One, LLC	Coventry, RI	2 GWh	Sep 2016	Dec 2024	Wind
Pfizer Groton Fuel Cell	Groton Fuel Cell 1 LLC	Groton, CT	30 GWh	Sep 2016	Dec 2024	Natural Gas
Athens Energy	Athens Energy, LLC	Athens, ME	58 GWh	Sep 2016	Dec 2024	Wood/Wood Waste Solids
GMP Solar - Richmond	Green Mountain Power Corp	Richmond, VT	3 GWh	Sep 2016	Sep 2025	Solar
Curtis Hill Solar CSG	CCC Solar Holdings LLC	Charlton, MA	3 GWh	Sep 2016	Dec 2024	Solar
Depot Hill Solar CSG	CCC Solar Holdings LLC	Charlton, MA	3 GWh	Sep 2016	Dec 2024	Solar
Grafton PV	MN8 Energy LLC	Grafton, MA	4 GWh	Sep 2016	Dec 2024	Solar
UMASS	Consolidated Edison Development Inc.	Amherst, MA	6 GWh	Sep 2016	Dec 2024	Solar
Carver MA 1 Community Solar	Navisun LLC	Carver, MA	3 GWh	Aug 2016	Dec 2024	Solar
Wareham MA 1 Community Solar	Navisun LLC	Wareham, MA	3 GWh	Aug 2016	Dec 2024	Solar
Westport MA 1 Community Solar	Navisun LLC	Westport, MA	2 GWh	Aug 2016	Dec 2024	Solar
Westport MA 2 Community Solar	Navisun LLC	Westport, MA	2 GWh	Aug 2016	Dec 2024	Solar
WED Coventry 2	WED Coventry Two, LLC	Coventry, RI	10 GWh	Jul 2016	Sep 2025	Wind
WED Coventry 3	WED Coventry Three, LLC	Coventry, RI	2 GWh	Jul 2016	Dec 2024	Wind
WED Coventry 4	WED Coventry Four, LLC	Coventry, RI	2 GWh	Jul 2016	Dec 2024	Wind
WED Coventry 6	Greenbacker Renewable Energy Corporation	Coventry, RI	8 GWh	Jul 2016	Sep 2025	Wind
Future Generation Wind	Consolidated Edison Solutions Inc.	Plymouth, MA	14 GWh	Jul 2016	Dec 2024	Wind
CED Westfield Solar, LLC	Consolidated Edison Development Inc.	Westfield, MA	3 GWh	Jul 2016	Dec 2024	Solar
Shirley Water	Altus Power America Management, LLC	Shirley, MA	3 GWh	Jul 2016	Dec 2024	Solar
WED Portsmouth One, LLC	Greenbacker Renewable Energy Corporation	Portsmouth, RI	4 GWh	Jul 2016	Dec 2024	Wind
Nebraska Valley Solar Farm	Town of Stowe- (VT)	Stowe, VT	1 GWh	Jul 2016	Dec 2024	Solar
Foster Solar	Foster Solar, LLC	North Scituate, RI	2 GWh	Jul 2016	Dec 2024	Solar
Passadumkeag Windpark LLC	Southern Power Co	Greenbush, ME	140 GWh	Jun 2016	Sep 2025	Wind
Stafford MS Ground Mount Community Solar	Town of Stafford - (CT)	Stafford, CT	3 GWh	Jun 2016	Dec 2024	Solar
GELD Solar Farm	Ameresco, Inc - GELD	Groton, MA	3 GWh	May 2016	Dec 2024	Solar
Brookfield Wire Company	Dynamic Energy Solutions, LLC	Brookfield, MA	2 GWh	May 2016	Dec 2024	Solar
Sudbury Solar	Ecos Energy LLC	Sudbury, VT	2 GWh	Apr 2016	Dec 2024	Solar
Rail Trail	Altus Power America Management, LLC	Great Barrington, MA	3 GWh	Apr 2016	Dec 2024	Solar
Rising Paper	Altus Power America Management, LLC	Great Barrington, MA	4 GWh	Apr 2016	Dec 2024	Solar
Ball Mountain Hydro	Eagle Creek Renewable Energy, LLC	Jamaica, VT	61 MWh	Mar 2016	Dec 2024	Water
Onset East Community Solar Facility	Kearsarge Onset LLC	Wareham, MA	2 GWh	Mar 2016	Dec 2024	Solar
Onset West Community Solar Facility	Kearsarge Onset LLC	Wareham, MA	2 GWh	Mar 2016	Dec 2024	Solar
Shuman Solar	NuGen Capital Management	Stoughton, MA	2 GWh	Mar 2016	Dec 2024	Solar
Southbridge Solar	AES Distributed Energy	Southbridge, MA	2 GWh	Feb 2016	Sep 2025	Solar
MDFA Devens-Saratoga	Terraform Arcadia	Devens, MA	3 GWh	Feb 2016	Dec 2024	Solar
Weston Landfill Solar	Ameresco, Inc - Weston	Weston, MA	3 GWh	Feb 2016	Dec 2024	Solar
UDR Glastonbury Fuel Cell	UIL Distributed Resources, LLC	Glastonbury, CT	18 GWh	Jan 2016	Dec 2024	Natural Gas
Town of Needham VNEM CSG	Tesla Inc.	Needham, MA	3 GWh	Jan 2016	Dec 2024	Solar
Williamsburg Solar LLC VNEM CSG	Tesla Inc.	Haydenville, MA	3 GWh	Jan 2016	Dec 2024	Solar
Jericho Power	Jericho Power LLC	Berlin, NH	22 GWh	Dec 2015	Sep 2025	Wind
West Brookfield Solar, LLC	CVI CleanCapital Solar 7	West Brookfield, MA	2 GWh	Dec 2015	Dec 2024	Solar
Old Wardour Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2024	Solar
Vuelta Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2024	Solar
Spring Hill Road	AES Distributed Energy	Barre, MA	772 MWh	Nov 2015	Sep 2025	Solar
Syncarpha Palmer, LLC	Syncarpha Palmer, LLC	Palmer, MA	7 GWh	Nov 2015	Dec 2024	Solar
Federal Road Solar 1, LLC CSG	Federal Road Solar 1, LLC	South Carver, MA	8 GWh	Nov 2015	Dec 2024	Solar
BWC Swan Pond River CSG	BWC Swan Pond River, LLC	Rehoboth, MA	3 GWh	Nov 2015	Dec 2024	Solar
West Groton CHP	Hollingsworth & Vose Co West Groton	Groton, MA	22 GWh	Nov 2015	Dec 2024	Natural Gas
Belchertown	Altus Power America Management, LLC	Belchertown, MA	1 GWh	Nov 2015	Dec 2024	Solar
Nexamp Peak CSG	Nexamp Peak, LLC	Hancock, MA	2 GWh	Nov 2015	Dec 2024	Solar
154 D Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Nov 2015	Dec 2024	Solar
RGS-Rutland VNM SREC II Project (MA)	TerraForm Solar XVII, LLC	Rutland, MA	2 GWh	Oct 2015	Dec 2024	Solar
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	21 GWh	Oct 2015	Sep 2025	Natural Gas : 84.6% Solar : 15.4%
Brookside	Terraform Arcadia	North Smithfield, RI	2 GWh	Oct 2015	Nov 2024	Solar
Wind Colebrook South	Wind Colebrook South	Colebrook, CT	11 GWh	Oct 2015	Sep 2025	Wind
Wilmington Solar	MN8 Energy LLC	Wilmington, MA	3 GWh	Oct 2015	Dec 2024	Solar
Bridgewater Complex Co-Generation Plant	Massachusetts Department of Correction	Bridgewater, MA	1 GWh	Oct 2015	Dec 2024	Natural Gas
Oakfield Wind Project	Onward Energy	City of Oakfield, ME	367 GWh	Sep 2015	Sep 2025	Wind
North Adams Landfill	Syncarpha North Adams, LLC	North Adams, MA	3 GWh	Sep 2015	Dec 2024	Solar
115 G Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	1 GWh	Sep 2015	Dec 2024	Solar
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	13 GWh	Jul 2015	Sep 2025	Natural Gas
Bridgewater Solar CSG	MN8 Energy LLC	Bridgewater, MA	4 GWh	Jul 2015	Dec 2024	Solar
Halifax Solar	NuGen Capital Management	Halifax, MA	4 GWh	Jul 2015	Dec 2024	Solar
Johnston Solar	Concord New Energy	Town of Johnston, RI	2 GWh	Jun 2015	Dec 2024	Solar
Hardwick-Athol & Eagle Hill	SEC CRSD Solar One, LLC	Hardwick, MA	3 GWh	Jun 2015	Dec 2024	Solar
Hampden	Altus Power America Management, LLC	Hampden, MA	5 GWh	Jun 2015	Dec 2024	Solar
Holliston Solar CSG	MN8 Energy LLC	Holliston, MA	1 GWh	Jun 2015	Dec 2024	Solar
Downing Parkway Solar	Downing Parkway Solar LLC	Pittsfield, MA	3 GWh	Jun 2015	Dec 2024	Solar
Leominster	Syncarpha Massachusetts, LLC	Leominster, MA	3 GWh	Apr 2015	Dec 2024	Solar
Fisher Road Solar	Fisher Road Solar I, LLC	Dartmouth, MA	8 GWh	Apr 2015	Dec 2024	Solar
UB Fuel Cell	UB Fuel Cell	Bridgeport, CT	10 GWh	Mar 2015	Dec 2023	Natural Gas
Freetown Solar	Mass Solar, LLC	Freetown, MA	6 GWh	Feb 2015	Dec 2024	Solar
Braley Road 2	Mass Solar, LLC	Freetown, MA	2 GWh	Feb 2015	Dec 2024	Solar
BlueWave Capital - Grafton (SREC II)	TerraForm Solar XVII, LLC	Grafton, MA	2 GWh	Feb 2015	Dec 2024	Solar
Stafford Hill Solar Hybrid	Green Mountain Power Corp	Rutland, VT	675 MWh	Feb 2015	Sep 2025	Solar
Kearsarge Southwick LLC	Kearsarge Solar LLC	Southwick, MA	4 GWh	Feb 2015	Dec 2024	Solar
Leicester One MA Solar LLC	CVI CleanCapital Solar 1 LLC	Leicester, MA	6 GWh	Dec 2014	Dec 2024	Solar
Twiss Street Solar	Citizens Enterprises Corporation	Westfield, MA	2 GWh	Dec 2014	Dec 2024	Solar
Chicopee River Solar	Citizens Enterprises Corporation	Springfield, MA	3 GWh	Dec 2014	Dec 2024	Solar
Chicopee Granby Road Solar	Citizens Enterprises Corporation	Chicopee, MA	2 GWh	Dec 2014	Dec 2024	Solar
Saddleback Ridge Wind Farm	CPV Saddleback Ridge Wind, LLC	Carthage, ME	83 GWh	Nov 2014	Dec 2024	Wind
Charlton Solar I CSG	Charlton Solar I, LLC	Charlton, MA	5 GWh	Nov 2014	Dec 2024	Solar
Main Street Solar Project	Greenbacker Renewable Energy Corporation	Rutland, VT	2 GWh	Nov 2014	Dec 2024	Solar
Templeton	Sunny Templeton, LLC	Templeton, MA	5 GWh	Nov 2014	Dec 2024	Solar
Bourne (MA) - Holliston I	NVT LICENSES, LLC	Holliston, MA	4 GWh	Nov 2014	Dec 2024	Solar
Braintree Landfill Solar	Ameresco, Inc - Braintree	Braintree, MA	1 GWh	Nov 2014	Dec 2024	Solar
Park St	Greenbacker Renewable Energy Corporation	Rutland, VT	2 GWh	Nov 2014	Dec 2024	Solar
Barton Solar Farm	Barton Solar, LLC	Barton, VT	2 GWh	Oct 2014	Dec 2024	Solar
Chester Power Partners	Altus Power America Management, LLC	North Chester, VT	3 GWh	Oct 2014	Dec 2024	Solar
Advance Stores Company, Inc	Tesla Inc.	Enfield, CT	1 GWh	Oct 2014	Dec 2024	Solar
Whitcomb Solar Farm	ERWR Whitcomb Farm Solar LLC	Essex Junction, VT	3 GWh	Sep 2014	Dec 2024	Solar
Tolland Solar NG LLC	NuGen Capital Management	Tolland, MA	5 GWh	Sep 2014	Dec 2024	Solar
Technology Drive Solar	Consolidated Edison Development Inc.	Brattleboro, VT	3 GWh	Aug 2014	Dec 2024	Solar
Brewster Landfill	Clean Focus Yield, LLC	Brewster, MA	5 GWh	Aug 2014	Dec 2024	Solar
Chatham Landfill	Clean Focus Yield, LLC	Chatham, MA	2 GWh	Aug 2014	Dec 2024	Solar
Barnstable Landfill	Clean Focus Yield, LLC	Marstons Mills, MA	5 GWh	Aug 2014	Dec 2024	Solar
Dennis Landfill	Clean Focus Yield, LLC	Dennis, MA	8 GWh	Aug 2014	Dec 2024	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	696.7 GWh	4
#25	Dominion Energy South Carolina, Inc.	25.7 TWh	87
#13	Duke Energy Carolinas	112.5 TWh	565
#17	Duke Energy Progress East	64.3 TWh	559
#52	Duke Energy Progress West	4.3 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.4 TWh	25
#12	New York Independent System Operator	131.6 TWh	1,211
#1	PJM Interconnection, LLC	870.7 TWh	2,465
#30	South Carolina Public Service Authority	18.9 TWh	34
#59	Southeastern Power Administration	1.5 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	188.0 TWh	2,075
#9	Tennessee Valley Authority	161.6 TWh	204
#10	Florida Power & Light Co.	148.9 TWh	187
#12	New York Independent System Operator	131.6 TWh	1,211
#13	Duke Energy Carolinas	112.5 TWh	565
#15	ISO New England	105.5 TWh	1,577
#16	Bonneville Power Administration	80.5 TWh	163
#17	Duke Energy Progress East	64.3 TWh	559
#18	PacifiCorp East	61.1 TWh	216
#19	Salt River Project Agricultural Improvement and Power District	60.0 TWh	48