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
Stillwater B	Brookfield Black Bear Hydro, LLC	Old Town, ME	9 GWh	Aug 2013	Dec 2025	Water
Messalonskee 2 (Oakland)	Messalonskee Stream Hydro LLC	Oakland, ME	7 GWh	Dec 1923	Dec 2025	Water
Solar Mule, LLC	Solar Mule, LLC	Oakland, ME	2 GWh	Aug 2017	Dec 2024	Solar
Messalonskee 3	Messalonskee Stream Hydro LLC	Oakland, ME	4 GWh	Dec 1917	Dec 2025	Water
North Bridgton	Nautilus Solar Solutions	Oakland, ME	8 GWh	Oct 2022	Dec 2025	Solar
Oakland	Nautilus Solar Solutions	Oakland, ME	9 GWh	Aug 2022	Dec 2025	Solar
Oak Bluffs Diesel Generating Facility	Vineyard Reliability LLC	Oak Bluffs, MA	3 GWh	Dec 1968	Sep 2025	Distillate Fuel Oil
CMEEC - Norwich Stott St Solar Hybrid	Tesla Inc.	Norwich, CT	4 GWh	Nov 2016	Dec 2025	Solar
LNG 1 & 2	Connecticut Mun Elec Engy Coop	Norwich, CT	382 MWh	Mar 2010	Dec 2025	Distillate Fuel Oil
CMEEC - Rogers Rd Solar	Tesla Inc.	Norwich, CT	2 GWh	Jan 2017	Dec 2025	Solar
Conn Mun Electric Energy Coop	Tesla Inc.	Norwich, CT	1 GWh	Nov 2016	Dec 2025	Solar
Backus Microgrid Project	Connecticut Mun Elec Engy Coop	Norwich, CT	843 MWh	Jul 2014	May 2026	Distillate Fuel Oil
Tenth Street	City of Norwich - (CT)	Norwich, CT	2 GWh	Apr 1967	Dec 2025	Water
Norton Landfill Solar	Citizens Enterprises Corporation	Norton, MA	2 GWh	Dec 2016	Dec 2025	Solar
Norton LLC	Greenbacker Renewable Energy Corporation	Norton, MA	1 GWh	Aug 2020	Dec 2025	Solar
Norton	Madison Energy Holdings LLC	Norton, MA	2 GWh	Feb 2023	Dec 2025	Solar
ER Bone Hill Solar, LLC	Altus Power America Management, LLC	Northfield, VT	2 GWh	Aug 2022	Dec 2025	Solar
NFM Solar Power LLC	FirstLight Power Resources, Inc. - MA	Northfield, MA	2 GWh	Feb 2012	Dec 2025	Solar
Syncarpha Puddon II Hybrid CSG	Syncarpha Puddon II, LLC	Northbridge, MA	8 GWh	Feb 2021	Dec 2025	Solar
Syncarpha Puddon I Hybrid CSG	Syncarpha Puddon I, LLC	Northbridge, MA	8 GWh	Feb 2021	Dec 2025	Solar
Syncarpha Northampton Hybrid CSG	Syncarpha Northampton, LLC	Northampton, MA	5 GWh	Nov 2020	Dec 2025	Solar
CED Northampton Solar LLC Hybrid	RWE Clean Energy	Northampton, MA	6 GWh	Nov 2019	Dec 2025	Solar
Smith College Central Heating Plant	The Trustees of Smith College	Northampton, MA	6 GWh	Sep 2008	Dec 2025	Natural Gas
Northampton Landfill Solar PV	Ameresco Glendale Road Solar PV LLC	Northampton, MA	2 GWh	Oct 2017	Dec 2025	Solar
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	May 2026	Natural Gas : 92.7% Distillate Fuel Oil : 7.3%
North Stonington Solar Center, LLC	Adapture Renewables, Inc.	North Stonington, CT	32 GWh	Sep 2022	Dec 2025	Solar
SR North Stonington	SR North Stonington, LLC	North Stonington, CT	15 GWh	Feb 2024	Dec 2025	Solar
Pomham Islander (CSG)	Nautilus Solar Solutions	North Smithfield, RI	1 GWh	Jun 2025	Dec 2025	Solar
GDIM 4, LLC	GDIM 4, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2025	Solar
GDIM 3, LLC	GDIM 3, LLC	North Smithfield, RI	15 GWh	Nov 2021	Dec 2025	Solar
TPE King Solar Holdings1, LLC (CSG)	Nautilus Solar Solutions	North Smithfield, RI	18 GWh	Mar 2022	Dec 2025	Solar
GDIM 2, LLC	GDIM 2, LLC	North Smithfield, RI	13 GWh	Nov 2021	Dec 2025	Solar
GDIM 1, LLC	GDIM 1, LLC	North Smithfield, RI	15 GWh	Nov 2021	Dec 2025	Solar
Brookside	Terraform Arcadia	North Smithfield, RI	969 MWh	Oct 2015	Nov 2025	Solar
Blackstone/Tupperware	Blackstone Hydro Inc.	North Smithfield, RI	2 GWh	Dec 1980	May 2026	Water
North Smithfield Solar Power 1	Onsite Partners, LLC	North Smithfield, RI	2 GWh	Nov 2018	Dec 2025	Solar
Foster Solar	Foster Solar, LLC	North Scituate, RI	2 GWh	Jul 2016	Dec 2025	Solar
North Providence	Captona N.P. LLC	North Providence, RI	3 GWh	Sep 2018	Dec 2025	Solar
Dry Bridge Solar (Brown University)	MN8 Energy LLC	North Kingstown, RI	64 GWh	Oct 2023	May 2026	Solar
North Kingstown Solar LLC	North Kingstown Solar LLC	North Kingstown, RI	3 GWh	Aug 2022	Dec 2024	Solar
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2025	Natural Gas
WED NK Green	WED NK Green LLC	North Kingstown, RI	3 GWh	Feb 2012	Dec 2025	Wind
West Davisville Solar	Altus Power America Management, LLC	North Kingstown, RI	3 GWh	Nov 2013	Dec 2025	Solar
North Haven Solar One	North Haven Solar One, LLC	North Haven, CT	3 GWh	Feb 2024	Dec 2025	Solar
Medtronic - New Haven	Bloom Energy	North Haven, CT	18 GWh	Sep 2020	Dec 2025	Natural Gas
Medtronic - New Haven 2	Bloom Energy	North Haven, CT	17 GWh	Sep 2020	Dec 2025	Natural Gas
DG Tufts Knoll LLC CSG	DG Tufts Knoll, LLC	North Grafton, MA	3 GWh	Jul 2017	Dec 2025	Solar
DG Tufts Science LLC CSG	DG Tufts Science, LLC	North Grafton, MA	1 GWh	Jan 2017	Dec 2025	Solar
Stone Hill Solar CSG	MN8 Energy LLC	North Easton, MA	2 GWh	Jun 2014	Dec 2025	Solar
Manheim New England	Cox Enterprises	North Dighton, MA	2 GWh	Nov 2012	Dec 2025	Solar
Cold River Road Solar	Onsite Partners, LLC	North Clarendon, VT	3 GWh	Nov 2016	Dec 2025	Solar
Clarendon Solar Farm	Clarendon Solar Farm, LLC	North Clarendon, VT	3 GWh	Jun 2014	Dec 2025	Solar
Chester Power Partners	Altus Power America Management, LLC	North Chester, VT	2 GWh	Oct 2014	Dec 2025	Solar
Carver	Captona Carver LLC	North Carver, MA	2 GWh	Apr 2017	Dec 2025	Solar
Becton Dickinson Ground & Roof Top	Madison Energy Investments LLC	North Canaan, CT	3 GWh	Feb 2018	Dec 2025	Solar
Bunce	LSE Indus LLC	North Canaan, CT	3 GWh	Mar 2022	Dec 2025	Solar
Sand Road	LSE Phoenix LLC	North Canaan, CT	3 GWh	Oct 2021	Dec 2025	Solar
JH Solar, LLC CSG	38 Degrees North, LLC	North Brookfield, MA	2 GWh	Oct 2017	Dec 2025	Solar
Ledeaux Solar, LLC CSG	38 Degrees North, LLC	North Brookfield, MA	1 GWh	Oct 2017	Dec 2025	Solar
Ryan Road Solar LLC Hybrid(CSG)	AES Distributed Energy	North Brookfield, MA	10 GWh	Nov 2021	Dec 2025	Solar
Lane Ave Solar LLC	AES Distributed Energy	North Brookfield, MA	2 GWh	Aug 2021	Dec 2025	Solar
BWC Lake Lashaway, LLC Hybrid	AES Distributed Energy	North Brookfield, MA	8 GWh	Apr 2021	Dec 2025	Solar : 99.4% Electricity used for energy storage : 0.6%
Brookfield Solar 2013 LLC	CVI CleanCapital Solar 6	North Brookfield, MA	3 GWh	Nov 2013	Dec 2025	Solar
North Brookfield	Mass Solar, LLC	North Brookfield, MA	4 GWh	May 2014	Dec 2025	Solar
Iron Horse Solar 4, LLC	Iron Horse Solar 4, LLC	North Billerica, MA	7 GWh	May 2017	Dec 2025	Solar
Iron Horse Solar I CSG	Iron Horse Solar 1, LLC	North Billerica, MA	4 GWh	Nov 2016	Dec 2025	Solar
Quarry	Nautilus Solar Solutions	North Berwick, ME	10 GWh	Nov 2022	Dec 2025	Solar
BNRG North Anson (CSG)	Nautilus Solar Solutions	North Anson, ME	3 GWh	Oct 2024	Dec 2025	Solar
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	240 GWh	Apr 1985	May 2026	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 2025	Solar
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	22 GWh	Feb 2009	Dec 2025	Landfill Gas
Dynamic - Norridgewock Martin Stream (CSG)	Nautilus Solar Solutions	Norridgewock, ME	9 GWh	Oct 2024	Dec 2025	Solar
BNRG Norridgewock (CSG)	Nautilus Solar Solutions	Norridgewock, ME	3 GWh	Oct 2024	Dec 2025	Solar
River Road	Norridgewock River Road Solar, LLC	Norridgewock, ME	8 GWh	Feb 2022	Dec 2025	Solar
15 Lincoln	Madison Energy Investments LLC	Norfolk, MA	1 GWh	Nov 2022	Dec 2025	Solar
Town of Norfolk MA at Medway Branch	Luminace Solar Massachusetts, LLC	Norfolk, MA	2 GWh	May 2012	Dec 2025	Solar
Norfolk Landfill Solar Project	NJR Clean Energy Ventures Corporation	Norfolk, CT	6 GWh	Nov 2024	Dec 2025	Solar
Niagara Depot Solar	Niagara Depot Solar, LLC	Niagara Falls, NY	5 GWh	Jun 2023	Dec 2025	Solar
Newton Rumford Landfill	Newton Municipal Solar LLC - Rumford	Newton, MA	2 GWh	Jun 2017	Dec 2025	Solar
Main Rd Community Solar	AES Distributed Energy	Newstead, NY	8 GWh	Jun 2022	Dec 2025	Solar
Newport	Great Bay Hydro Corp	Newport, VT	13 GWh	Dec 1935	Dec 2025	Water
Newington	Granite Shore Power	Newington, NH	157 GWh	May 1974	Apr 2026	Residual Fuel Oil : 64.1% Natural Gas : 34.5% Distillate Fuel Oil : 1.4%
Newington Energy Center	Essential Power Operating Services, LLC	Newington, NH	2 TWh	Sep 2002	May 2026	Natural Gas : 92.8% Distillate Fuel Oil : 7.2%
Bashaw Solar CSG 1, LLC	Bashaw Solar 1, LLC	Newbury, MA	3 GWh	Mar 2017	Dec 2025	Solar
15 Glen Harris RD	ME Sandy River LLC	New Sharon, ME	5 GWh	May 2024	Dec 2025	Solar
Kimberly Clark-Unit 1,2,3	Kimberly-Clark Corporation	New Milford, CT	233 GWh	Mar 2008	Dec 2025	Natural Gas
Bulls Bridge	FirstLight Power Resources Services LLC	New Milford, CT	27 GWh	Dec 1902	Dec 2025	Water
New Milford Gas Recovery	WM Renewable Energy LLC	New Milford, CT	4 GWh	Apr 2008	Dec 2025	Landfill Gas
New Marlborough	Sunrise on Knight Rd. LLC	New Marlborough, MA	7 GWh	May 2021	Dec 2024	Solar
Yale New Haven - New London	Bloom Energy	New London, CT	14 GWh	Aug 2022	Dec 2025	Natural Gas
Connecticut College	Bloom Energy	New London, CT	10 GWh	Aug 2019	Dec 2025	Natural Gas
Next Generation Solar Farm	Cypress Creek Renewables	New Haven, VT	4 GWh	Nov 2017	Dec 2025	Solar
Open View Solar Farm	Cross Pollination Inc	New Haven, VT	3 GWh	Aug 2013	Dec 2025	Solar
Beldens	Green Mountain Power Corp	New Haven, VT	6 GWh	Jul 1913	Dec 2025	Water
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	21 GWh	Jul 2015	May 2026	Natural Gas
New Haven Steam	Generation Bridge II Connecticut, LLC	New Haven, CT	167 GWh	Jun 1975	Jan 2026	Residual Fuel Oil : 45.1% Natural Gas : 40.3% Distillate Fuel Oil : 12.2% Kerosene : 2.5%
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%
Amazon BDL3 Solar Project	Solar Star Prime 1 LLC	New Haven, CT	2 GWh	Sep 2019	Dec 2025	Solar
CCSU Fuel Cell Project	New Britain Renewable Energy, LLC	New Britain, CT	7 GWh	Mar 2012	Dec 2025	Natural Gas
CCSU Co-Gen-STBY Gen	Central Connecticut State University	New Britain, CT	10 MWh	Sep 1993	Dec 2025	Natural Gas

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