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 Northampton Hybrid CSG	Syncarpha Northampton, LLC	Northampton, MA	5 GWh	Nov 2020	Dec 2024	Solar
CED Northampton Solar LLC Hybrid	Consolidated Edison Development Inc.	Northampton, MA	7 GWh	Nov 2019	Dec 2024	Solar
Smith College Central Heating Plant	The Trustees of Smith College	Northampton, MA	14 GWh	Sep 2008	Dec 2024	Natural Gas
Northampton Landfill Solar PV	Ameresco Glendale Road Solar PV LLC	Northampton, MA	4 GWh	Oct 2017	Dec 2024	Solar
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	Sep 2025	Natural Gas : 95.1% Distillate Fuel Oil : 4.9%
North Stonington Solar Center, LLC	Adapture Renewables, Inc.	North Stonington, CT	30 GWh	Sep 2022	Dec 2024	Solar
SR North Stonington	SR North Stonington, LLC	North Stonington, CT	13 GWh	Feb 2024	Dec 2024	Solar
TPE King Solar Holdings1, LLC (CSG)	Nautilus Solar Solutions	North Smithfield, RI	18 GWh	Mar 2022	Dec 2024	Solar
GDIM 4, LLC	GDIM 4, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2024	Solar
GDIM 3, LLC	GDIM 3, LLC	North Smithfield, RI	15 GWh	Nov 2021	Dec 2024	Solar
GDIM 2, LLC	GDIM 2, LLC	North Smithfield, RI	13 GWh	Nov 2021	Dec 2024	Solar
GDIM 1, LLC	GDIM 1, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2024	Solar
North Smithfield Solar Power 1	AEP Onsite Partners, LLC	North Smithfield, RI	1 GWh	Nov 2018	Dec 2024	Solar
Blackstone/Tupperware	Blackstone Hydro Inc.	North Smithfield, RI	2 GWh	Dec 1980	Sep 2025	Water
Brookside	Terraform Arcadia	North Smithfield, RI	2 GWh	Oct 2015	Nov 2024	Solar
Foster Solar	Foster Solar, LLC	North Scituate, RI	2 GWh	Jul 2016	Dec 2024	Solar
North Providence	Captona N.P. LLC	North Providence, RI	3 GWh	Sep 2018	Dec 2024	Solar
North Kingstown Solar LLC	North Kingstown Solar LLC	North Kingstown, RI	3 GWh	Aug 2022	Dec 2024	Solar
Dry Bridge Solar (Brown University)	MN8 Energy LLC	North Kingstown, RI	69 GWh	Oct 2023	Sep 2025	Solar
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	147 GWh	Dec 2002	Dec 2024	Natural Gas
West Davisville Solar	Altus Power America Management, LLC	North Kingstown, RI	3 GWh	Nov 2013	Dec 2024	Solar
WED NK Green	WED NK Green LLC	North Kingstown, RI	2 GWh	Feb 2012	Dec 2024	Wind
Medtronic - New Haven	Bloom Energy	North Haven, CT	2 GWh	Sep 2020	Dec 2024	Natural Gas
Medtronic - New Haven 2	Bloom Energy	North Haven, CT	16 GWh	Sep 2020	Dec 2024	Natural Gas
North Haven Solar One	North Haven Solar One, LLC	North Haven, CT	3 GWh	Feb 2024	Dec 2024	Solar
DG Tufts Science LLC CSG	DG Tufts Science, LLC	North Grafton, MA	1 GWh	Jan 2017	Dec 2024	Solar
DG Tufts Knoll LLC CSG	DG Tufts Knoll, LLC	North Grafton, MA	3 GWh	Jul 2017	Dec 2024	Solar
Stone Hill Solar CSG	MN8 Energy LLC	North Easton, MA	3 GWh	Jun 2014	Dec 2024	Solar
Manheim New England	Cox Enterprises	North Dighton, MA	2 GWh	Nov 2012	Dec 2024	Solar
Cold River Road Solar	AEP Onsite Partners, LLC	North Clarendon, VT	3 GWh	Nov 2016	Dec 2024	Solar
Clarendon Solar Farm	Clarendon Solar Farm, LLC	North Clarendon, VT	3 GWh	Jun 2014	Dec 2024	Solar
Chester Power Partners	Altus Power America Management, LLC	North Chester, VT	3 GWh	Oct 2014	Dec 2024	Solar
Carver	Captona Carver LLC	North Carver, MA	2 GWh	Apr 2017	Dec 2024	Solar
Sand Road	LSE Phoenix LLC	North Canaan, CT	4 GWh	Oct 2021	Dec 2024	Solar
Becton Canaan	DG Northeast 1, LLC	North Canaan, CT	3 GWh	Feb 2018	Dec 2024	Solar
Bunce	LSE Indus LLC	North Canaan, CT	3 GWh	Mar 2022	Dec 2024	Solar
Ledeaux Solar, LLC CSG	38 Degrees North, LLC	North Brookfield, MA	1 GWh	Oct 2017	Dec 2024	Solar
JH Solar, LLC CSG	38 Degrees North, LLC	North Brookfield, MA	2 GWh	Oct 2017	Dec 2024	Solar
BWC Lake Lashaway, LLC Hybrid	AES Distributed Energy	North Brookfield, MA	8 GWh	Apr 2021	Dec 2024	Solar
Ryan Road Solar LLC Hybrid(CSG)	AES Distributed Energy	North Brookfield, MA	9 GWh	Nov 2021	Dec 2024	Solar
Lane Ave Solar LLC	AES Distributed Energy	North Brookfield, MA	2 GWh	Aug 2021	Dec 2024	Solar
North Brookfield	Mass Solar, LLC	North Brookfield, MA	4 GWh	May 2014	Dec 2024	Solar
Brookfield Solar 2013 LLC	CVI CleanCapital Solar 6	North Brookfield, MA	2 GWh	Nov 2013	Dec 2024	Solar
Iron Horse Solar I CSG	Iron Horse Solar 1, LLC	North Billerica, MA	4 GWh	Nov 2016	Dec 2024	Solar
Iron Horse Solar 4, LLC	Iron Horse Solar 4, LLC	North Billerica, MA	7 GWh	May 2017	Dec 2024	Solar
Quarry	Nautilus Solar Solutions	North Berwick, ME	10 GWh	Nov 2022	Dec 2024	Solar
BNRG North Anson (CSG)	Nautilus Solar Solutions	North Anson, ME	143 MWh	Oct 2024	Dec 2024	Solar
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	233 GWh	Apr 1985	Sep 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
North Adams Landfill	Syncarpha North Adams, LLC	North Adams, MA	3 GWh	Sep 2015	Dec 2024	Solar
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	18 GWh	Feb 2009	Dec 2024	Landfill Gas
Dynamic - Norridgewock Martin Stream (CSG)	Nautilus Solar Solutions	Norridgewock, ME	206 MWh	Oct 2024	Dec 2024	Solar
River Road	Norridgewock River Road Solar, LLC	Norridgewock, ME	8 GWh	Feb 2022	Dec 2024	Solar
BNRG Norridgewock (CSG)	Nautilus Solar Solutions	Norridgewock, ME	171 MWh	Oct 2024	Dec 2024	Solar
Town of Norfolk MA at Medway Branch	Luminace Solar Massachusetts, LLC	Norfolk, MA	2 GWh	May 2012	Dec 2024	Solar
Norfolk Landfill Solar Project	NJR Clean Energy Ventures Corporation	Norfolk, CT	494 MWh	Nov 2024	Dec 2024	Solar
Niagara Depot Solar	Niagara Depot Solar, LLC	Niagara Falls, NY	5 GWh	Jun 2023	Dec 2024	Solar
Newton Rumford Landfill	Newton Municipal Solar LLC - Rumford	Newton, MA	3 GWh	Jun 2017	Dec 2024	Solar
Main Rd Community Solar	AES Distributed Energy	Newstead, NY	8 GWh	Jun 2022	Dec 2024	Solar
Newport	Great Bay Hydro Corp	Newport, VT	21 GWh	Dec 1935	Dec 2024	Water
Newington Energy Center	Essential Power Operating Services, LLC	Newington, NH	2 TWh	Sep 2002	Sep 2025	Natural Gas : 95.7% Distillate Fuel Oil : 4.3%
Newington	Granite Shore Power	Newington, NH	95 GWh	May 1974	Aug 2025	Natural Gas : 60.0% Residual Fuel Oil : 39.5% Distillate Fuel Oil : 0.6%
Bashaw Solar CSG 1, LLC	Bashaw Solar 1, LLC	Newbury, MA	3 GWh	Mar 2017	Dec 2024	Solar
15 Glen Harris RD	ME Sandy River LLC	New Sharon, ME	2 GWh	May 2024	Dec 2024	Solar
Bulls Bridge	FirstLight Power Resources Services LLC	New Milford, CT	31 GWh	Dec 1902	Dec 2024	Water
Kimberly Clark-Unit 1,2,3	Kimberly-Clark Corporation	New Milford, CT	219 GWh	Mar 2008	Dec 2024	Natural Gas
New Milford Gas Recovery	WM Renewable Energy LLC	New Milford, CT	5 GWh	Apr 2008	Dec 2024	Landfill Gas
New Marlborough	Sunrise on Knight Rd. LLC	New Marlborough, MA	7 GWh	May 2021	Dec 2024	Solar
Connecticut College	Bloom Energy	New London, CT	9 GWh	Aug 2019	Dec 2024	Natural Gas
Yale New Haven - New London	Bloom Energy	New London, CT	15 GWh	Aug 2022	Dec 2024	Natural Gas
Beldens	Green Mountain Power Corp	New Haven, VT	14 GWh	Jul 1913	Dec 2024	Water
Next Generation Solar Farm	Cypress Creek Renewables	New Haven, VT	4 GWh	Nov 2017	Dec 2024	Solar
Open View Solar Farm	Cross Pollination Inc	New Haven, VT	3 GWh	Aug 2013	Dec 2024	Solar
New Haven Harbor	Generation Bridge II Connecticut, LLC	New Haven, CT	93 GWh	Jun 1975	Sep 2025	Natural Gas : 72.8% Residual Fuel Oil : 17.4% Distillate Fuel Oil : 6.4% Kerosene : 3.3%
IKEA New Haven Rooftop PV & Fuel Cell	IKEA Property Inc	New Haven, CT	3 GWh	Jun 2012	Dec 2024	Natural Gas : 73.1% Solar : 26.9%
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	13 GWh	Jul 2015	Sep 2025	Natural Gas
Amazon BDL3 Solar Project	Solar Star Prime 1 LLC	New Haven, CT	2 GWh	Sep 2019	Dec 2024	Solar
CCSU Co-Gen-STBY Gen	Central Connecticut State University	New Britain, CT	90 MWh	Sep 1993	Dec 2024	Natural Gas
CCSU Fuel Cell Project	New Britain Renewable Energy, LLC	New Britain, CT	11 GWh	Mar 2012	Dec 2024	Natural Gas
Sullivan Solar	Altus Power America Management, LLC	New Bedford, MA	2 GWh	Jul 2014	Dec 2024	Solar
Greater New Bedford LFG Utiliz. Facility	CommonWealth New Bedford Energy LLC	New Bedford, MA	17 GWh	Sep 2005	Dec 2024	Landfill Gas
Town of Needham VNEM CSG	Tesla Inc.	Needham, MA	3 GWh	Jan 2016	Dec 2024	Solar
Natick Mall	Natick Mall	Natick, MA	4 GWh	Sep 2018	Dec 2024	Solar
Nashua Plant	NextEra Renewable Fuels, LLC	Nashua, NH	13 GWh	Mar 1996	Dec 2024	Landfill Gas
Mine Falls Generating Station	City of Nashua, NH	Nashua, NH	13 GWh	Nov 1985	Dec 2024	Water
Naples	Naples Casco Solar 1, LLC	Naples, ME	3 GWh	Nov 2021	Dec 2024	Solar
Block Island Wind Farm	Deepwater Wind Block Island LLC	NA, RI	85 GWh	Nov 2016	Sep 2025	Wind
Ottauquechee Hydro	Green Mountain Power Corp	N. Hartland, VT	978 MWh	Mar 1983	Dec 2024	Water
Moscow	Greenbacker Renewable Energy Corporation	Moscow, ME	14 GWh	-	Sep 2025	Wind
ER Salvage Yard	Greenbacker Renewable Energy Corporation	Morrisville, VT	3 GWh	Oct 2021	Dec 2024	Solar
Cadys Falls	Village of Morrisville - (VT)	Morrisville, VT	139 MWh	Jul 1914	Dec 2024	Water
Morrisville	Village of Morrisville - (VT)	Morrisville, VT	5 GWh	Jul 1924	Dec 2024	Water
Lawrence Brook	Greenbacker Renewable Energy Corporation	Morristown, VT	3 GWh	Nov 2020	Dec 2024	Solar
Moretown Generating Station	Moretown Hydroelectric LLC	Moretown, VT	3 GWh	Dec 1988	Dec 2023	Water
Middlesex 2	Green Mountain Power Corp	Moretown, VT	10 GWh	Dec 1927	Dec 2024	Water
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	135 GWh	Mar 2005	Sep 2025	Natural Gas
Wrightsville Hydro Plant	Washington Electric Coop - (VT)	Montpelier, VT	2 GWh	Aug 1985	Nov 2024	Water
Kearsarge Montague	Kearsarge Montague LLC	Montague, MA	7 GWh	May 2018	Dec 2024	Solar
Turners Falls	FirstLight Power Resources, Inc. - MA	Montague, MA	12 GWh	Dec 1904	Dec 2024	Water
Cabot	FirstLight Power Resources, Inc. - MA	Montague, MA	304 GWh	Dec 1914	Dec 2024	Water
Kearsarge Montague BD(CSG)	Kearsarge Montague BD LLC	Montague, MA	3 GWh	Oct 2021	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