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	May 2025
Annual Generation	103.6 TWh
Power Plants	1,487
Utilities	782
Ranked #15 out of 65 in terms of net annual generation
Ranked #11 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 57.4% Nuclear \| 24.9% Water \| 6.1% Other Fuel \| 4.5% Wind \| 3.5% Solar \| 1.4% Coal \| 0.3%

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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
Norwich WWTP	City of Norwich - (CT)	Norwich, CT	1 MWh	Apr 2006	Mar 2024	Distillate Fuel Oil
Jiminy Peak Wind QF	Jiminy Peak Mountain Resort, LLC	Hancock, MA	1 MWh	Jul 2007	Dec 2022	Wind
Rhode Island Solar Renewable Energy IV, LLC	Rhode Island Solar Renewable Energy IV, LLC	Tiverton, RI	1 MWh	Nov 2023	Dec 2023	Solar
Signature Breads Chelsea	JDC 65R Owner, LLC	Chelsea, MA	2 MWh	Apr 2019	Dec 2023	Distillate Fuel Oil
Colchester 16	Green Mountain Power Corp	Colchester, VT	4 MWh	Sep 1965	Dec 2023	Distillate Fuel Oil
Richmond Hill	Greenbacker Renewable Energy Corporation	Richmond, ME	16 MWh	Nov 2023	Dec 2023	Solar
Park Solar	Ecos Energy LLC	Woodbridge, CT	20 MWh	Nov 2023	Dec 2023	Solar
IXYS - Beverly	IXYS Integrated Circuits Division, LLC	Beverly, MA	23 MWh	Dec 1996	Dec 2023	Distillate Fuel Oil : 58.5% Natural Gas : 41.5%
High Street Station	Town of Ipswich - (MA)	Ipswich, MA	28 MWh	May 1937	Dec 2023	Natural Gas : 75.8% Distillate Fuel Oil : 24.2%
Norden 1-3	Third Taxing District of Norwalk	Norwalk, CT	42 MWh	May 2004	Dec 2022	Distillate Fuel Oil
Outer Cape Community Battery	Eversource	Provincetown, MA	48 MWh	Nov 2022	Feb 2025	Electricity used for energy storage
Acushnet MA 1	Navisun LLC	Acushnet, MA	59 MWh	Nov 2023	Dec 2023	Solar
Torrington Terminal	Connecticut Jet Power LLC	Torrington, CT	67 MWh	Oct 1967	Dec 2023	Kerosene
Branford	Connecticut Jet Power LLC	Branford, CT	68 MWh	Oct 1967	Dec 2023	Kerosene
Framingham State University Plant	Framingham State University	Framingham, MA	74 MWh	May 1974	Feb 2025	Solar : 67.6% Distillate Fuel Oil : 32.4%
Wilkins Station	Town of Marblehead - (MA)	Marblehead, MA	78 MWh	Oct 1975	Dec 2023	Distillate Fuel Oil
Stamford Health	Stamford Health Systems, Inc.	Stamford, CT	84 MWh	Dec 1983	Dec 2022	Distillate Fuel Oil
Rutland	Green Mountain Power Corp	Rutland City, VT	84 MWh	Nov 1962	Mar 2024	Distillate Fuel Oil
CCSU Co-Gen-STBY Gen	Central Connecticut State University	New Britain, CT	88 MWh	Sep 1993	Dec 2023	Natural Gas
Robbins Lumber	Robbins Lumber Inc	Searsmont, ME	97 MWh	Dec 1980	Dec 2023	Distillate Fuel Oil
Pleasant Street	Greenbacker Renewable Energy Corporation	Wilton, ME	98 MWh	Nov 2023	Dec 2023	Solar
Franklin Drive	Connecticut Jet Power LLC	Torrington, CT	100 MWh	Oct 1968	Dec 2023	Kerosene
ASD Cotuit MA Solar LLC	ASD Cotuit MA Solar LLC	Sandwich, MA	110 MWh	Oct 2023	Dec 2023	Solar
Fishers Island 1	Connecticut Mun Elec Engy Coop	Fisher's Island, NY	119 MWh	Nov 2010	Dec 2023	Distillate Fuel Oil
GRS Fall River	Gas Recovery Systems Inc	Fall River, MA	121 MWh	Jun 2000	Dec 2022	Landfill Gas
Cenergy - Kiger	Luminace Sunbeam Development Holdings, LLC	Embden, ME	122 MWh	Nov 2023	Dec 2023	Solar
Devon Station	Devon Power LLC	Milford, CT	123 MWh	Dec 1984	Dec 2023	Kerosene : 89.2% Natural Gas : 10.8%
North Main Street	City of Norwich - (CT)	Norwich, CT	138 MWh	Jul 1972	May 2023	Distillate Fuel Oil
Spring Hill Road	AES Distributed Energy	Barre, MA	162 MWh	Nov 2015	Feb 2025	Solar
Dorchester Solar Site	Massachusetts Electric Co	Dorchester, MA	181 MWh	Dec 2011	Dec 2023	Solar
Ascutney	Green Mountain Power Corp	Weatherfield, VT	192 MWh	Jul 1961	Feb 2025	Distillate Fuel Oil
Jewett City 1	Connecticut Mun Elec Engy Coop	Jewett City, CT	198 MWh	Jan 2010	Dec 2023	Distillate Fuel Oil
Arctaris Saddleback Solar	Arctaris Saddleback Solar, LLC	Dallas Plantation, ME	201 MWh	Oct 2023	Dec 2023	Solar
Cenergy - Richards (CSG)	Luminace Sunbeam Development Holdings, LLC	Fairfield, ME	220 MWh	Sep 2023	Dec 2023	Solar
Caterpillar Hill	AES Clean Energy	Sedgwick, ME	235 MWh	Nov 2023	Dec 2023	Solar
Cadys Falls	Village of Morrisville - (VT)	Morrisville, VT	236 MWh	Jul 1914	Apr 2023	Water
M Street Jet	Massachusetts Bay Trans Auth	Boston, MA	275 MWh	Apr 1979	Dec 2023	Kerosene
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	332 MWh	Sep 2010	Feb 2025	Distillate Fuel Oil
Centech Gas Generator	Town of Shrewsbury - (MA)	Shrewsbury, MA	340 MWh	Mar 2019	Dec 2023	Natural Gas
Corkwood Solar (CSG)	NextGrid Corkwood, LLC	Howland, ME	344 MWh	Oct 2023	Dec 2023	Solar
Gravel Pit Solar, LLC	Gravel Pit Solar, LLC	East Windsor, CT	354 MWh	-	Feb 2025	Solar
Cherry Street	Town of Hudson - (MA)	Hudson, MA	417 MWh	Apr 1951	Dec 2023	Distillate Fuel Oil : 73.9% Natural Gas : 26.1%
Lost Nation	Granite Shore Power	Groveton, NH	428 MWh	Aug 1969	Dec 2023	Distillate Fuel Oil
Gray Solar	Ecos Energy LLC	Rutland, VT	463 MWh	Jul 2023	Dec 2023	Solar
Gary Court 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	466 MWh	Jun 2010	Dec 2023	Distillate Fuel Oil
Burlington GT	City of Burlington Electric - (VT)	Burlington, VT	472 MWh	Aug 1971	Dec 2023	Distillate Fuel Oil
Front Street	City of Chicopee - (MA)	Chicopee, MA	476 MWh	Dec 1977	Dec 2023	Distillate Fuel Oil
Wellesley College Central Utility Plant	Wellesley College	Wellesley, MA	480 MWh	May 1985	Dec 2023	Natural Gas
BJ's Wholesale Club, Inc- Uxbridge	Tesla Inc.	Uxbridge, MA	496 MWh	Jun 2017	Dec 2023	Solar
Schiller	Granite Shore Power	Portsmouth, NH	517 MWh	Sep 1952	Feb 2025	Jet Fuel
Cape Gas Turbine	FPL Energy Cape LLC	Portland, ME	532 MWh	Dec 1969	Dec 2023	Distillate Fuel Oil
Standish	Nautilus Solar Solutions	Standish, ME	535 MWh	Sep 2023	Dec 2023	Solar
White Lake	Granite Shore Power	Tamworth, NH	552 MWh	Jun 1968	Dec 2023	Jet Fuel
Fort Hill 1, 2, 3 & 4	Connecticut Mun Elec Engy Coop	Uncasville, CT	560 MWh	Jul 2010	Feb 2025	Distillate Fuel Oil
Bridge Street 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	562 MWh	Jun 2010	Dec 2023	Distillate Fuel Oil
LNG 1 & 2	Connecticut Mun Elec Engy Coop	Norwich, CT	573 MWh	Mar 2010	Dec 2023	Distillate Fuel Oil
Lebanon Pines 1 & 2	Connecticut Mun Elec Engy Coop	Lebanon, CT	577 MWh	Mar 2010	Dec 2023	Distillate Fuel Oil
UMass Boston	UMass Boston	Dorchester, MA	659 MWh	Dec 1971	Dec 2023	Solar : 91.2% Distillate Fuel Oil : 8.8%
McAllister Landfill	Solar Breakers LLC	Portsmouth, RI	693 MWh	Sep 2022	Dec 2023	Solar
Norton	Madison Energy Holdings LLC	Norton, MA	707 MWh	Feb 2023	Dec 2023	Solar
WYM 1250 Palmer LLC	CVI CleanCapital Solar 6	Palmer, MA	755 MWh	Aug 2013	Dec 2023	Solar
Waste Water Treatment Plant	City of Pittsfield	Pittsfield, MA	763 MWh	Dec 2011	Dec 2022	Solar
Exelon Framingham LLC	Constellation Power, Inc	Framingham, MA	792 MWh	Aug 1969	Dec 2023	Distillate Fuel Oil
Howard Lane Solar	NJR Clean Energy Ventures Corporation	Glocester, RI	842 MWh	Aug 2023	Dec 2023	Solar
ZPD-PT Solar Project 2017-044 LLC CSG	AES Distributed Energy	Spencer, MA	846 MWh	Sep 2021	Dec 2023	Solar
NEDC Solar Site	Massachusetts Electric Co	Whitinsville, MA	878 MWh	May 2010	Dec 2023	Solar
Berlin 5	Green Mountain Power Corp	Berlin, VT	890 MWh	May 1972	Feb 2025	Kerosene
Stafford Hill Solar Hybrid	Green Mountain Power Corp	Rutland, VT	903 MWh	Feb 2015	Feb 2025	Solar
VPPSA Project 10	Vermont Public Power Supply Authority	Swanton, VT	908 MWh	Apr 2010	Dec 2023	Distillate Fuel Oil
W K Sanders	Village of Morrisville - (VT)	Hyde Park, VT	915 MWh	Jun 1983	Dec 2023	Water
North Smithfield Solar Power 1	AEP Onsite Partners, LLC	North Smithfield, RI	919 MWh	Nov 2018	Dec 2023	Solar
UMASS	Consolidated Edison Development Inc.	Amherst, MA	941 MWh	Sep 2016	Dec 2023	Solar
Backus Microgrid Project	Connecticut Mun Elec Engy Coop	Norwich, CT	972 MWh	Jul 2014	Feb 2025	Distillate Fuel Oil
Haverhill Solar Power Project	Massachusetts Electric Co	Haverhill, MA	1 GWh	Nov 2010	Dec 2023	Solar
Treasure Lane Solar 1	AES Clean Energy	Manchester, ME	1 GWh	Apr 2023	Dec 2023	Solar
Freetown MA 1, LLC	Navisun LLC	Freetown, MA	1 GWh	Nov 2022	Dec 2023	Solar
Hewlett-Packard (HP) - Andover, MA	Tesla Inc.	Andover, MA	1 GWh	May 2017	Dec 2023	Solar
Town of East Bridgewater CSG	Tesla Inc.	East Bridgewater, MA	1 GWh	May 2013	Dec 2023	Solar
Amazon BDL3 Solar Project	Solar Star Prime 1 LLC	New Haven, CT	1 GWh	Sep 2019	Dec 2023	Solar
Lowell Solar Landfill	Heliovaas LLC	Lowell, MA	1 GWh	Nov 2013	Dec 2023	Solar
Charlestown Wind Turbine	MWRA Charlestown	Charlestown, MA	1 GWh	Sep 2011	Dec 2023	Wind
Braintree Landfill Solar	Ameresco, Inc - Braintree	Braintree, MA	1 GWh	Nov 2014	Dec 2023	Solar
CVEC Round 4 Brewster Captn Golf Course	Freemans Way Solar Project 2019, LLC	Brewster, MA	1 GWh	Feb 2022	Dec 2023	Solar
Wareham Solar PV	NSTAR Electric Company	Wareham, MA	1 GWh	Nov 2018	Dec 2023	Solar
West Brookfield Solar, LLC	CVI CleanCapital Solar 7	West Brookfield, MA	1 GWh	Dec 2015	Dec 2023	Solar
Advance Stores Company, Inc	Tesla Inc.	Enfield, CT	1 GWh	Oct 2014	Dec 2023	Solar
State Street Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2023	Solar
Nebraska Valley Solar Farm	Town of Stowe- (VT)	Stowe, VT	1 GWh	Jul 2016	Dec 2023	Solar
Webster Solar	Webster Solar, LLC	Webster, MA	1 GWh	Nov 2017	Dec 2023	Solar
VEC Alburgh Array	SoCore Energy LLC	Alburgh, VT	1 GWh	Nov 2016	Dec 2023	Solar
Maynard PV	Terraform Arcadia	Maynard, MA	1 GWh	Dec 2013	Dec 2023	Solar
Broadway Solar (CSG)	NextGrid Bitterbush, LLC	Bangor, ME	1 GWh	Aug 2023	Dec 2023	Solar
DDR Shoppers World	Altus Power America Management, LLC	Framingham, MA	1 GWh	Oct 2017	Dec 2023	Solar
Conn Mun Electric Energy Coop	Tesla Inc.	Norwich, CT	1 GWh	Nov 2016	Dec 2023	Solar
Browne Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2023	Solar
158th Fighter Wing Solar Farm	158th Fighter Wing	South Burlington, VT	1 GWh	Aug 2011	Dec 2023	Solar
MA Solar Storage 1 Hybrid	Origis Energy USA, Inc	Sterling, MA	1 GWh	Feb 2018	Dec 2023	Solar
Indian Hill Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2023	Solar
Cos Cob	Connecticut Jet Power LLC	Greenwich, CT	1 GWh	Aug 1969	Dec 2023	Kerosene
Oak Bluffs Diesel Generating Facility	Vineyard Reliability LLC	Oak Bluffs, MA	1 GWh	Dec 1968	Dec 2023	Distillate Fuel Oil

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	742.1 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.1 TWh	85
#13	Duke Energy Carolinas	111.3 TWh	556
#17	Duke Energy Progress East	65.3 TWh	554
#52	Duke Energy Progress West	4.2 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.0 TWh	20
#12	New York Independent System Operator	130.9 TWh	1,100
#1	PJM Interconnection, LLC	859.4 TWh	2,305
#29	South Carolina Public Service Authority	19.3 TWh	33
#60	Southeastern Power Administration	1.4 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	189.5 TWh	1,943
#8	Tennessee Valley Authority	158.9 TWh	170
#10	Florida Power & Light Co.	148.5 TWh	159
#12	New York Independent System Operator	130.9 TWh	1,100
#13	Duke Energy Carolinas	111.3 TWh	556
#15	ISO New England	103.6 TWh	1,487
#16	Bonneville Power Administration	83.0 TWh	158
#17	Duke Energy Progress East	65.3 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.5 TWh	45
#19	PacifiCorp East	57.0 TWh	204