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
Maynard PV	Terraform Arcadia	Maynard, MA	1 GWh	Dec 2013	Dec 2024	Solar
Charlestown Wind Turbine	MWRA Charlestown	Charlestown, MA	1 GWh	Sep 2011	Dec 2024	Wind
Webster Solar	Webster Solar, LLC	Webster, MA	1 GWh	Nov 2017	Dec 2024	Solar
Indian River Hydro	Eagle Creek Renewable Energy, LLC	Russell, MA	1 GWh	Nov 1909	Dec 2024	Water
Williams College - Campus CHP	President & Trustees of Williams College	Williamstown, MA	1 GWh	Feb 2003	Dec 2024	Natural Gas : 84.0% Distillate Fuel Oil : 16.0%
CMEEC - Navy NE Trident	Tesla Inc.	Groton, CT	1 GWh	May 2017	Dec 2024	Solar
158th Fighter Wing Solar Farm	158th Fighter Wing	South Burlington, VT	1 GWh	Aug 2011	Dec 2023	Solar
Nebraska Valley Solar Farm	Town of Stowe- (VT)	Stowe, VT	1 GWh	Jul 2016	Dec 2024	Solar
ME Augusta 13 York Farm Rd Solar	SOL ME Augusta 13 York Farm, LLC	Augusta, ME	1 GWh	Dec 2023	Dec 2024	Solar
Swaggertown Solar II	Green Street Power Partners	Glenville, NY	1 GWh	Aug 2024	Dec 2024	Solar
Sutton Solar 2, LLC CSG	Sutton Solar 2, LLC	Sutton, MA	1 GWh	Nov 2020	Dec 2024	Solar
ZPD-PT Solar Project 2017-044 LLC CSG	AES Distributed Energy	Spencer, MA	1 GWh	Sep 2021	Dec 2024	Solar
Lowell Solar Landfill	Heliovaas LLC	Lowell, MA	1 GWh	Nov 2013	Dec 2024	Solar
Acushnet MA 2 (CSG)	Navisun LLC	Acushnet, MA	1 GWh	Feb 2024	Dec 2024	Solar
Pleasantdale Road Community Solar	Pleasantdale Road Solar, LLC	Rutland, MA	1 GWh	Aug 2017	Dec 2024	Solar
Town of East Bridgewater CSG	Tesla Inc.	East Bridgewater, MA	1 GWh	May 2013	Dec 2024	Solar
McAllister Landfill	Solar Breakers LLC	Portsmouth, RI	1 GWh	Sep 2022	Dec 2024	Solar
265 Pleasant Solar NG, LLC	NuGen Capital Management	Lunenburg, MA	1 GWh	Jun 2014	Dec 2024	Solar
ALDI DC 2	Powerflex	South Windsor, CT	1 GWh	Jan 2018	Dec 2024	Solar
Big George PV CSG	Altus Power America Management, LLC	Plymouth, MA	1 GWh	Aug 2018	Dec 2024	Solar
DG Tufts Science LLC CSG	DG Tufts Science, LLC	North Grafton, MA	1 GWh	Jan 2017	Dec 2024	Solar
VEC Alburgh Array	SoCore Energy LLC	Alburgh, VT	1 GWh	Nov 2016	Dec 2024	Solar
Antanavica Solar	Cypress Creek Renewables	Leicester, MA	1 GWh	Jul 2018	Dec 2024	Solar
Wendell MA 1	Wendell MA 1 LLC	Wendell, MA	1 GWh	Nov 2018	Dec 2024	Solar
Jackson Solar (CT)	Ecos Energy LLC	Griswold, CT	1 GWh	Nov 2019	Dec 2024	Solar
Sherman Solar	Ecos Energy LLC	Griswold, CT	1 GWh	Nov 2019	Dec 2024	Solar
Ledeaux Solar, LLC CSG	38 Degrees North, LLC	North Brookfield, MA	1 GWh	Oct 2017	Dec 2024	Solar
Manchester Community College North	Onyx Asset Services Group	Great Path, CT	1 GWh	Sep 2018	Dec 2024	Solar
Plainfield Solar 1	Ecos Energy LLC	Plainfield, CT	1 GWh	Dec 2019	Dec 2024	Solar
Town of Halfmoon	Tesla Inc.	Waterford, NY	1 GWh	May 2017	Dec 2024	Solar
Skyway Avenue Solar Farm	REA Investments, LLC	Frenchville, ME	1 GWh	Feb 2024	Oct 2024	Solar
Shirley Landfill	Altus Power America Management, LLC	Shirley, MA	1 GWh	Apr 2017	Dec 2024	Solar
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	1 GWh	Jul 2005	Dec 2024	Landfill Gas
Barre Solar III LLC	AES Distributed Energy	Barre, MA	1 GWh	Feb 2018	Dec 2024	Solar
Cranberry Solar	GWE Cranberry Solar RT, LLC	Middleborough, MA	1 GWh	Nov 2016	Dec 2024	Solar
Erving CSG	Erving Poplar Mountain Solar 1, LLC	Erving, MA	1 GWh	Aug 2020	Dec 2024	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	1 GWh	May 2018	Dec 2024	Solar
Belchertown	Altus Power America Management, LLC	Belchertown, MA	1 GWh	Nov 2015	Dec 2024	Solar
115 G Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	1 GWh	Sep 2015	Dec 2024	Solar
Katama Farm	Clean Focus Yield, LLC	Edgartown, MA	1 GWh	May 2014	Dec 2024	Solar
Plainfield Solar 2	Ecos Energy LLC	Plainfield, CT	1 GWh	Mar 2020	Dec 2024	Solar
State Street Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2024	Solar
Norton	Madison Energy Holdings LLC	Norton, MA	1 GWh	Feb 2023	Dec 2024	Solar
Mascoma Hydro	Green Mountain Power Corp	W. Lebanon, NH	2 GWh	Nov 1988	Dec 2024	Water
Adams Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
Tisbury Landfill Solar	Clean Focus Yield, LLC	Tisbury, MA	2 GWh	Jun 2014	Dec 2024	Solar
Boston Scientific Solar	Consolidated Edison Solutions Inc.	Quincy, MA	2 GWh	Nov 2012	Dec 2024	Solar
Jefferson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Dec 2017	Dec 2024	Solar
Acushnet Hawes Reed Road	CleanCapital Holdings	Dartmouth, MA	2 GWh	Jun 2012	Dec 2024	Solar
Ipswich Wind Turbine	Town of Ipswich - (MA)	Ipswich, MA	2 GWh	Apr 2011	Dec 2024	Wind
Nolan	LSE Crater LLC	Great Barrington, MA	2 GWh	Oct 2017	Dec 2024	Solar
Indian Hill Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	2 GWh	Mar 2014	Dec 2024	Solar
Pike Road Solar (NY)	RPNY Solar 6, LLC	Batavia, NY	2 GWh	Jun 2024	Dec 2024	Solar
Foster Solar	Foster Solar, LLC	North Scituate, RI	2 GWh	Jul 2016	Dec 2024	Solar
Freetown MA 1, LLC	Navisun LLC	Freetown, MA	2 GWh	Nov 2022	Dec 2024	Solar
Dorchester Solar Site	Massachusetts Electric Co	Dorchester, MA	2 GWh	Dec 2011	Dec 2024	Solar
Hamilton Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
Fredonia Solar LLC	Greenbacker Renewable Energy Corporation	Fredonia, NY	2 GWh	Aug 2021	Dec 2024	Solar
Rochester MA 2	Rochester MA 2 LLC	Rochester, MA	2 GWh	Nov 2018	Dec 2024	Solar
Wilson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
Manchester Community College East	Onyx Asset Services Group	Manchester, CT	2 GWh	Sep 2018	Dec 2024	Solar
Cohasse Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	2 GWh	Sep 2017	Dec 2024	Solar
Franklin Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
154 D Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Nov 2015	Dec 2024	Solar
Acushnet MA 1	Navisun LLC	Acushnet, MA	2 GWh	Nov 2023	Dec 2024	Solar
Ticket Network South Windsor	Powerflex	South Windsor, CT	2 GWh	Apr 2018	Dec 2024	Solar
Millis MA 1	Millis MA 1 LLC	Millis, MA	2 GWh	Oct 2018	Dec 2024	Solar
Wilson Solar (MA)	Consolidated Edison Solutions Inc.	Spencer, MA	2 GWh	May 2013	Dec 2024	Solar
Green Providence Wind I, LLC	Green Providence Wind I, LLC	Providence, RI	2 GWh	Nov 2021	Dec 2024	Wind
Braley Road 2	Mass Solar, LLC	Freetown, MA	2 GWh	Feb 2015	Dec 2024	Solar
Methuen Landfill	CleanCapital Holdings	Methuen, MA	2 GWh	Jun 2013	Dec 2024	Solar
700 Binnewater	Madison Energy Investments LLC	Rosendale, NY	2 GWh	Aug 2022	Dec 2024	Solar
Town of Branford	Tesla Inc.	Branford, CT	2 GWh	May 2018	Dec 2024	Solar
McHenry Solar	Ecos Energy LLC	Hampton, CT	2 GWh	Sep 2021	Dec 2024	Solar
GSPP NESV, LLC	Green Street Power Partners	Attleboro, MA	2 GWh	Feb 2023	Dec 2024	Solar
St. Joseph's Solar, LLC CSG	38 Degrees North, LLC	Charlton, MA	2 GWh	Nov 2017	Dec 2024	Solar
Smith (VT)	Green Mountain Power Corp	Bradford, VT	2 GWh	Nov 1982	Dec 2024	Water
Cherry Valley Solar, LLC CSG	38 Degrees North, LLC	Leicester, MA	2 GWh	Oct 2017	Dec 2024	Solar
Syncarpha Hancock III CSG	Syncarpha Hancock III, LLC	Pittsfield, MA	2 GWh	Oct 2017	Dec 2024	Solar
Little Bay	Altus Power America Management, LLC	Providence, RI	2 GWh	Feb 2014	Dec 2024	Solar
Few Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2024	Solar
126 Grove Solar LLC	Altus Power America Management, LLC	Franklin, MA	2 GWh	May 2012	Dec 2024	Solar
Brookfield Wire Company	Dynamic Energy Solutions, LLC	Brookfield, MA	2 GWh	May 2016	Dec 2024	Solar
Brookside	Terraform Arcadia	North Smithfield, RI	2 GWh	Oct 2015	Nov 2024	Solar
JH Solar, LLC CSG	38 Degrees North, LLC	North Brookfield, MA	2 GWh	Oct 2017	Dec 2024	Solar
DG Haverhill CSG	DG Haverhill LLC	Haverhill, MA	2 GWh	Aug 2017	Dec 2024	Solar
Amazon BDL3 Solar Project	Solar Star Prime 1 LLC	New Haven, CT	2 GWh	Sep 2019	Dec 2024	Solar
Blair Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2024	Solar
Woodchuck Solar, LLC CSG	38 Degrees North, LLC	Spencer, MA	2 GWh	Nov 2017	Dec 2024	Solar
Palombo B Solar, LLC CSG	38 Degrees North, LLC	Uxbridge, MA	2 GWh	Nov 2017	Dec 2024	Solar
East Brookfield Main Street Solar LLC CS	AES Distributed Energy	East Brookfield, MA	2 GWh	Nov 2020	Nov 2024	Solar
Kearsarge Upper Union	Kearsarge Upper Union LLC	Franklin, MA	2 GWh	Feb 2023	Dec 2024	Solar
Dudley River 2 Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	2 GWh	Oct 2017	Dec 2024	Solar
Blair Wire Village Solar, LLC CSG	38 Degrees North, LLC	Spencer, MA	2 GWh	Nov 2017	Dec 2024	Solar
Clinton Solar	Ecos Energy LLC	Griswold, CT	2 GWh	Apr 2021	Dec 2024	Solar
VEC Magee Hill Solar	SoCore Energy LLC	Hinesburgh, VT	2 GWh	Oct 2017	Dec 2024	Solar
Farley Road Community Solar	Farley Road Solar, LLC	Dudley, MA	2 GWh	Jul 2017	Dec 2024	Solar
Madison Solar (CT)	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2024	Solar
Sudbury Landfill	Heliovaas LLC	Sudbury, MA	2 GWh	Nov 2013	Dec 2024	Solar
Millbury MA #1092	Millbury MA #1092 LLC	Millbury, MA	2 GWh	May 2019	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