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
Cavendish	Green Mountain Power Corp	Cavendish, VT	1 GWh	Jan 1907	Dec 2025	Water
VEC Alburgh Array	SoCore Energy LLC	Alburgh, VT	1 GWh	Nov 2016	Dec 2025	Solar
Oneida County- DPW	Tesla Inc.	Oriskany, NY	1 GWh	Sep 2017	Dec 2025	Solar
Big George PV CSG	Altus Power America Management, LLC	Plymouth, MA	1 GWh	Aug 2018	Dec 2025	Solar
Oakdale Power Station	Massachusetts Water Res Auth	West Boylston, MA	1 GWh	Apr 1951	Dec 2025	Water
Ledeaux Solar, LLC CSG	38 Degrees North, LLC	North Brookfield, MA	1 GWh	Oct 2017	Dec 2025	Solar
15 Lincoln	Madison Energy Investments LLC	Norfolk, MA	1 GWh	Nov 2022	Dec 2025	Solar
Barre Solar III LLC	AES Distributed Energy	Barre, MA	1 GWh	Feb 2018	Dec 2025	Solar
SP-339 Mechanic Falls	Madison Energy Investments LLC	Mechanic Falls, ME	1 GWh	Nov 2024	Dec 2025	Solar
Belchertown	Altus Power America Management, LLC	Belchertown, MA	1 GWh	Nov 2015	Dec 2025	Solar
DG Tufts Science LLC CSG	DG Tufts Science, LLC	North Grafton, MA	1 GWh	Jan 2017	Dec 2025	Solar
Syncarpha Hancock III CSG	Syncarpha Hancock III, LLC	Pittsfield, MA	1 GWh	Oct 2017	Dec 2025	Solar
Indian Hill Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2025	Solar
Browne Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2025	Solar
Rochester MA 2	Rochester MA 2 LLC	Rochester, MA	1 GWh	Nov 2018	Dec 2025	Solar
Roosevelt Trail	Madison Energy Investments LLC	Windham, ME	1 GWh	Nov 2024	Dec 2025	Solar
Redbrook Community Solar 1	Redbrook Solar 1, LLC	Plympton, MA	1 GWh	Sep 2017	Dec 2025	Solar
Antanavica Solar	SunStrong Management, LLC	Leicester, MA	1 GWh	Jul 2018	Dec 2024	Solar
Manchester Community College North	Onyx Asset Services Group	Great Path, CT	1 GWh	Sep 2018	Dec 2024	Solar
State Street Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2025	Solar
Town of Halfmoon	Tesla Inc.	Waterford, NY	1 GWh	May 2017	Dec 2024	Solar
Pomham Islander (CSG)	Nautilus Solar Solutions	North Smithfield, RI	1 GWh	Jun 2025	Dec 2025	Solar
Holliston Solar CSG	MN8 Energy LLC	Holliston, MA	1 GWh	Jun 2015	Dec 2025	Solar
Little Bay	Altus Power America Management, LLC	Providence, RI	1 GWh	Feb 2014	Dec 2025	Solar
158th Fighter Wing Solar Farm	158th Fighter Wing	South Burlington, VT	1 GWh	Aug 2011	Dec 2025	Solar
WYM 1250 Palmer LLC	CVI CleanCapital Solar 6	Palmer, MA	1 GWh	Aug 2013	Dec 2025	Solar
Jericho Landfill Solar Farm	SoCore Energy LLC	Jerico, VT	1 GWh	Dec 2020	Dec 2025	Solar
Fredonia Solar LLC	Altus Power America Management, LLC	Fredonia, NY	1 GWh	Aug 2021	Dec 2025	Solar
Cohasse Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	1 GWh	Sep 2017	Dec 2025	Solar
Park Solar	Ecos Energy LLC	Woodbridge, CT	1 GWh	Nov 2023	Dec 2025	Solar
Boston Scientific Solar	RWE Clean Energy	Quincy, MA	1 GWh	Nov 2012	Dec 2025	Solar
ME Augusta 13 York Farm Rd Solar	SOL ME Augusta 13 York Farm, LLC	Augusta, ME	1 GWh	Dec 2023	Dec 2025	Solar
Erving CSG	Erving Poplar Mountain Solar 1, LLC	Erving, MA	1 GWh	Aug 2020	Dec 2025	Solar
JH Solar, LLC CSG	38 Degrees North, LLC	North Brookfield, MA	2 GWh	Oct 2017	Dec 2025	Solar
McAllister Landfill	Solar Breakers LLC	Portsmouth, RI	2 GWh	Sep 2022	Dec 2025	Solar
Methuen Landfill	CleanCapital Holdings	Methuen, MA	2 GWh	Jun 2013	Dec 2025	Solar
Cherry Valley Solar, LLC CSG	38 Degrees North, LLC	Leicester, MA	2 GWh	Oct 2017	Dec 2025	Solar
Town of Branford	Tesla Inc.	Branford, CT	2 GWh	May 2018	Dec 2025	Solar
Kearsarge Upper Union	Kearsarge Upper Union LLC	Franklin, MA	2 GWh	Feb 2023	Dec 2025	Solar
Tisbury Landfill Solar	Clean Focus Yield, LLC	Tisbury, MA	2 GWh	Jun 2014	Dec 2025	Solar
Westport MA 2 Community Solar	Navisun LLC	Westport, MA	2 GWh	Aug 2016	Dec 2025	Solar
Nolan	LSE Crater LLC	Great Barrington, MA	2 GWh	Oct 2017	Dec 2024	Solar
Plainfield Solar 2	Ecos Energy LLC	Plainfield, CT	2 GWh	Mar 2020	Dec 2025	Solar
700 Binnewater	Madison Energy Investments LLC	Rosendale, NY	2 GWh	Aug 2022	Dec 2025	Solar
Brookfield Wire Company	Dynamic Energy Solutions, LLC	Brookfield, MA	2 GWh	May 2016	Dec 2025	Solar
Dickinson Solar (CT)	Ecos Energy LLC	Hampton, CT	2 GWh	May 2020	Dec 2025	Solar
CMEEC - Rogers Rd Solar	Tesla Inc.	Norwich, CT	2 GWh	Jan 2017	Dec 2025	Solar
Millis MA 1	Millis MA 1 LLC	Millis, MA	2 GWh	Oct 2018	Dec 2025	Solar
Lilly Lane	LSE Chamaeleon LLC	Charlton, MA	2 GWh	May 2018	Oct 2025	Solar
Manchester Community College East	Onyx Asset Services Group	Manchester, CT	2 GWh	Sep 2018	Dec 2024	Solar
Pittsfield 44 - M&W PV	NSTAR Electric Company	Pittsfield, MA	2 GWh	Jul 2018	Dec 2025	Solar
Plainfield Solar 1	Ecos Energy LLC	Plainfield, CT	2 GWh	Dec 2019	Dec 2025	Solar
115 G Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Sep 2015	Dec 2025	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	2 GWh	May 2018	Dec 2025	Solar
Sudbury Solar	Ecos Energy LLC	Sudbury, VT	2 GWh	Apr 2016	Dec 2025	Solar
Woodchuck Solar, LLC CSG	38 Degrees North, LLC	Spencer, MA	2 GWh	Nov 2017	Dec 2025	Solar
Ticket Network South Windsor	Powerflex	South Windsor, CT	2 GWh	Apr 2018	Dec 2024	Solar
Jackson Solar (CT)	Ecos Energy LLC	Griswold, CT	2 GWh	Nov 2019	Dec 2025	Solar
Brewster Landfill	Clean Focus Yield, LLC	Brewster, MA	2 GWh	Aug 2014	Dec 2025	Solar
Sherman Solar	Ecos Energy LLC	Griswold, CT	2 GWh	Nov 2019	Dec 2025	Solar
SVEP Solar Project Company	CVI CleanCapital Solar 1 LLC	Pownal, VT	2 GWh	Nov 2012	Dec 2025	Solar
Jefferson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Dec 2017	Dec 2025	Solar
Onset West Community Solar Facility	Kearsarge Onset LLC	Wareham, MA	2 GWh	Mar 2016	Dec 2025	Solar
Onset East Community Solar Facility	Kearsarge Onset LLC	Wareham, MA	2 GWh	Mar 2016	Dec 2025	Solar
Barton Acres Solar, LLC CSG	38 Degrees North, LLC	Phillipston, MA	2 GWh	Sep 2017	Dec 2025	Solar
Sunderland Solar PV	NSTAR Electric Company	Sunderland, MA	2 GWh	Aug 2018	Dec 2025	Solar
Freetown MA 1, LLC	Navisun LLC	Freetown, MA	2 GWh	Nov 2022	Dec 2025	Solar
Adams Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2025	Solar
Hamilton Solar	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
Franklin Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2025	Solar
Few Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2025	Solar
McHenry Solar	Ecos Energy LLC	Hampton, CT	2 GWh	Sep 2021	Dec 2025	Solar
St. Joseph's Solar, LLC CSG	38 Degrees North, LLC	Charlton, MA	2 GWh	Nov 2017	Dec 2025	Solar
Blair Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2025	Solar
154 D Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Nov 2015	Dec 2025	Solar
ZPD-PT Solar Project 2017-021 LLC Hybrid	AES Distributed Energy	Wilbraham, MA	2 GWh	Dec 2020	Dec 2025	Solar
NFM Solar Power LLC	FirstLight Power Resources, Inc. - MA	Northfield, MA	2 GWh	Feb 2012	Dec 2025	Solar
Foster Solar	Foster Solar, LLC	North Scituate, RI	2 GWh	Jul 2016	Dec 2025	Solar
Cos Cob	Connecticut Jet Power LLC	Greenwich, CT	2 GWh	Aug 1969	Dec 2025	Kerosene
BWC Wading River One, Two, Three CSG	Ameresco BWC Wading River LLC	Mendon, MA	2 GWh	Oct 2017	Dec 2025	Solar
Dudley River 2 Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	2 GWh	Oct 2017	Dec 2025	Solar
Blair Wire Village Solar, LLC CSG	38 Degrees North, LLC	Spencer, MA	2 GWh	Nov 2017	Dec 2025	Solar
Farley Road Community Solar	Farley Road Solar, LLC	Dudley, MA	2 GWh	Jul 2017	Dec 2025	Solar
Dorchester Solar Site	Massachusetts Electric Co	Dorchester, MA	2 GWh	Dec 2011	Dec 2025	Solar
GSPP NESV, LLC	Green Street Power Partners	Attleboro, MA	2 GWh	Feb 2023	Dec 2025	Solar
Norton	Madison Energy Holdings LLC	Norton, MA	2 GWh	Feb 2023	Dec 2025	Solar
Millbury MA #1092	Millbury MA #1092 LLC	Millbury, MA	2 GWh	May 2019	Dec 2025	Solar
Madison Solar (CT)	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2025	Solar
Palombo B Solar, LLC CSG	38 Degrees North, LLC	Uxbridge, MA	2 GWh	Nov 2017	Dec 2025	Solar
Dudley River Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	2 GWh	Oct 2017	Dec 2025	Solar
VEC Magee Hill Solar	SoCore Energy LLC	Hinesburgh, VT	2 GWh	Oct 2017	Dec 2025	Solar
CP Middletown Solar I LLC	Green Street Power Partners	Middletown, CT	2 GWh	Nov 2019	Dec 2025	Solar
Rockland Solar CSG	MN8 Energy LLC	Rockland, MA	2 GWh	Nov 2013	Dec 2025	Solar
Katama Farm	Clean Focus Yield, LLC	Edgartown, MA	2 GWh	May 2014	Dec 2025	Solar
Corbin Russwin Phase 3 Berlin	Powerflex	Berlin, CT	2 GWh	Mar 2018	Dec 2025	Solar
CP Middletown Solar II LLC	Green Street Power Partners	Middletown, CT	2 GWh	Nov 2019	Dec 2025	Solar
Whatley Renewables	Whatley Renewables, LLC	Whatley, MA	2 GWh	Sep 2020	Dec 2025	Solar
Howard Lane Solar	NJR Clean Energy Ventures Corporation	Glocester, RI	2 GWh	Aug 2023	Dec 2025	Solar
Town of Norfolk MA at Medway Branch	Luminace Solar Massachusetts, LLC	Norfolk, MA	2 GWh	May 2012	Dec 2025	Solar

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