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 2024
Annual Generation	102.8 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 \| 57.6% Nuclear \| 25% Water \| 7.7% Other Fuel \| 4.6% Wind \| 3.3% Solar \| 1.2% Coal \| 0.1%

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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
Tolland Solar NG LLC	NuGen Capital Management	Tolland, MA	5 GWh	Sep 2014	Dec 2023	Solar
Tiverton Power Plant	Tiverton Power LLC	Tiverton, RI	2 TWh	Feb 2000	Dec 2023	Natural Gas
Tisbury Landfill Solar	Clean Focus Yield, LLC	Tisbury, MA	2 GWh	Jun 2014	Dec 2023	Solar
Tihonet Solar	Consolidated Edison Solutions Inc.	Wareham, MA	2 GWh	Apr 2014	Dec 2023	Solar
Ticket Network South Windsor	EnterSolar	South Windsor, CT	2 GWh	Apr 2018	Dec 2023	Solar
Thundermist Hydro	City of Woonsocket	Providence, RI	5 GWh	May 1981	Sep 2023	Water
Three Corners Solar	Three Corners Solar, LLC	Unity, ME	48 GWh	-	Aug 2024	Solar
Theodore Drive Community Solar	Theodore Drive Solar, LLC	Westminster, MA	2 GWh	Feb 2018	Dec 2023	Solar
Texon Hydroelectric Project	Hitchcock Hydro, LLC	Russell, MA	6 GWh	Dec 1981	Dec 2023	Water
TES Rowtier	SkyHigh 2 Solar	Westminster, MA	5 GWh	Mar 2021	Dec 2023	Solar
Tenth Street	City of Norwich - (CT)	Norwich, CT	4 GWh	Apr 1967	Dec 2023	Water
Templeton	Sunny Templeton, LLC	Templeton, MA	5 GWh	Nov 2014	Dec 2023	Solar
Technology Drive Solar	Consolidated Edison Development Inc.	Brattleboro, VT	3 GWh	Aug 2014	Dec 2023	Solar
Tank Farm 4	Solar Breakers LLC	Portsmouth, RI	4 GWh	Sep 2022	Dec 2023	Solar
Tanglewood Circle Solar 1 LLC	Tanglewood Circle Solar 1 LLC	Becket, MA	7 GWh	Oct 2018	Dec 2023	Solar
Taftville	FirstLight Power Resources Services LLC	Taftville, CT	5 GWh	Dec 1905	Dec 2023	Water
Syncarpha Westminster Hybrid CSG	Syncarpha Westminster, LLC	Westminster, MA	6 GWh	Oct 2022	Dec 2023	Solar
Syncarpha Tewksbury Hybrid CSG	Syncarpha Tewksbury, LLC	Tewksbury, MA	4 GWh	Jan 2022	Dec 2023	Solar
Syncarpha Still River, LLC CSG	Syncarpha Still River, LLC	Bolton, MA	3 GWh	Nov 2016	Dec 2023	Solar
Syncarpha Puddon II Hybrid CSG	Syncarpha Puddon II, LLC	Northbridge, MA	9 GWh	Feb 2021	Dec 2022	Solar
Syncarpha Puddon I Hybrid CSG	Syncarpha Puddon I, LLC	Northbridge, MA	9 GWh	Feb 2021	Dec 2022	Solar
Syncarpha Palmer, LLC	Syncarpha Palmer, LLC	Palmer, MA	8 GWh	Nov 2015	Dec 2023	Solar
Syncarpha Northbridge II Hybrid CSG	Syncarpha Northbridge II, LLC	Whitinsville, MA	8 GWh	Mar 2021	Dec 2023	Solar
Syncarpha Northbridge I Hybrid(CSG)	Syncarpha Northbridge I, LLC	Whitinsville, MA	9 GWh	Nov 2021	Dec 2023	Solar
Syncarpha Northampton Hybrid CSG	Syncarpha Northampton, LLC	Northampton, MA	5 GWh	Nov 2020	Dec 2023	Solar
Syncarpha Millbury Hybrid (CSG)	Syncarpha Millbury, LLC	Millbury, MA	8 GWh	Sep 2022	Dec 2023	Solar
Syncarpha Leicester Hybrid CSG	Syncarpha Leicester, LLC	Leicester, MA	4 GWh	May 2021	Dec 2023	Solar : 99.5% Electricity used for energy storage : 0.5%
Syncarpha Hancock III CSG	Syncarpha Hancock III, LLC	Pittsfield, MA	2 GWh	Oct 2017	Dec 2023	Solar
Syncarpha Hancock II CSG	Syncarpha Hancock II, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2023	Solar
Syncarpha Hancock I CSG	Syncarpha Hancock I, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2023	Solar
Syncarpha Halifax Hybrid CSG	Syncarpha Halifax, LLC	Halifax, MA	3 GWh	Nov 2020	Dec 2023	Solar : 99.0%
Syncarpha Freetown	Marie's Way Solar I, LLC	Freetown, MA	7 GWh	Oct 2016	Dec 2023	Solar
Syncarpha Blandford Hybrid CSG	Syncarpha Blandford, LLC	Blandford, MA	8 GWh	Nov 2019	Dec 2023	Solar
Sydney Solar	Ecos Energy LLC	Hampton, CT	3 GWh	May 2020	Dec 2023	Solar
SVEP Solar Project Company	CVI CleanCapital Solar 1 LLC	Pownal, VT	2 GWh	Nov 2012	Dec 2023	Solar
Sutton Solar CSG	Sutton Solar, LLC	Sutton, MA	3 GWh	Oct 2016	Dec 2023	Solar
Sutton Solar 2, LLC CSG	Sutton Solar 2, LLC	Sutton, MA	1 GWh	Nov 2020	Dec 2023	Solar
Sunpin Blandford	Blandford Sun, LLC	Southwick, MA	6 GWh	May 2020	Nov 2023	Solar
SunGen Sharon 1 LLC	SunGen Sharon 1 LLC	Sharon, VT	3 GWh	Jul 2012	Dec 2023	Solar
Sunderland Solar PV	NSTAR Electric Company	Sunderland, MA	2 GWh	Aug 2018	Dec 2023	Solar
Sullivan Solar	Altus Power America Management, LLC	New Bedford, MA	2 GWh	Jul 2014	Dec 2023	Solar
Sugar Hill Solar 1	Sugar Hill Solar 1, LLC	Clifton Park, NY	8 GWh	Nov 2020	Dec 2023	Solar
Sudbury Solar	Ecos Energy LLC	Sudbury, VT	3 GWh	Apr 2016	Dec 2023	Solar
Sudbury Landfill	Heliovaas LLC	Sudbury, MA	2 GWh	Nov 2013	Dec 2023	Solar
Subase Microgrid Project	Connecticut Mun Elec Engy Coop	Groton, CT	34 GWh	Nov 2022	Dec 2023	Natural Gas
Stow PV	AES Distributed Energy	Stow, MA	2 GWh	Nov 2013	Dec 2023	Solar
Stony Brook	Massachusetts Mun Wholes Electric Co	Ludlow, MA	26 GWh	Oct 1981	Aug 2024	Distillate Fuel Oil : 98.4% Natural Gas : 1.6%
Stone Hill Solar CSG	MN8 Energy LLC	North Easton, MA	3 GWh	Jun 2014	Dec 2023	Solar
Stillwater Hydro Station	Brookfield Black Bear Hydro, LLC	Stillwater, ME	12 GWh	Dec 1912	Dec 2023	Water
Stillwater B	Brookfield Black Bear Hydro, LLC	Old Town, ME	13 GWh	Aug 2013	Dec 2023	Water
Stevenson	FirstLight Power Resources Services LLC	Monroe, CT	111 GWh	Dec 1918	Dec 2023	Water
Stevens Mills Dam	Eagle Creek Renewable Energy, LLC	Franklin, NH	10 GWh	May 1982	Dec 2023	Water
Stetson Wind II	Evergreen Wind, LLC	Danforth, ME	46 GWh	Feb 2010	Dec 2023	Wind
Stetson Wind I	Evergreen Wind, LLC	Danforth, ME	107 GWh	Dec 2008	Dec 2023	Wind
Stetson Road Solar - Barre I	Kearsarge Solar LLC	Barre, MA	3 GWh	Apr 2014	Dec 2023	Solar
State Street Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2023	Solar
Standish	Nautilus Solar Solutions	Standish, ME	535 MWh	Sep 2023	Dec 2023	Solar
Stamford Health	Stamford Health Systems, Inc.	Stamford, CT	84 MWh	Dec 1983	Dec 2022	Distillate Fuel Oil
Stafford St Solar 3 CSG	Stafford St Solar 3, LLC	Leicester, MA	2 GWh	Nov 2017	Dec 2023	Solar
Stafford St Solar 1 CSG	Stafford St Solar 1, LLC	Leicester, MA	12 GWh	Nov 2017	Dec 2023	Solar
Stafford St 2 Community Solar	Stafford St Solar 2, LLC	Lecister, MA	3 GWh	Apr 2018	Dec 2023	Solar
Stafford MS Ground Mount Community Solar	Town of Stafford - (CT)	Stafford, CT	3 GWh	Jun 2016	Dec 2023	Solar
Stafford Hill Solar Hybrid	Green Mountain Power Corp	Rutland, VT	859 MWh	Feb 2015	Aug 2024	Solar
St. Joseph's Solar, LLC CSG	38 Degrees North, LLC	Charlton, MA	2 GWh	Nov 2017	Dec 2023	Solar
St. Albans SPEED Project	St. Albans Solar Partners, LLC	St. Albans, VT	2 GWh	Nov 2013	Dec 2023	Solar
Spruce Mountain WInd	CPV Spruce Mountain Wind LLC	Bryant Pond, ME	53 GWh	Nov 2011	Dec 2023	Wind
Springfield Solar PV	NSTAR Electric Company	Springfield, MA	6 GWh	Dec 2018	Dec 2023	Solar
Spring Street Solar 1 CSG	Spring Street Solar 1, LLC	Carver, MA	5 GWh	Feb 2017	Dec 2023	Solar
Spring Hill Road	AES Distributed Energy	Barre, MA	3 GWh	Nov 2015	Mar 2024	Solar
Spencer Solar MA	Citizens Enterprises Corporation	Spencer, MA	3 GWh	Feb 2020	Dec 2023	Solar
Southwick Solar PV	NSTAR Electric Company	Southwick, MA	8 GWh	Dec 2018	Aug 2024	Solar
Southington Solar One	DG Connecticut III, LLC	Southington, CT	9 GWh	Jan 2022	Dec 2023	Solar
Southern Sky Renew Energy Berkley LLC	Southern Sky Renewable Energy Berkley, LLC	Berkley, MA	3 GWh	May 2014	Dec 2023	Solar
Southbridge Solar	AES Distributed Energy	Southbridge, MA	2 GWh	Feb 2016	Aug 2024	Solar
Southbridge PV	Terraform Arcadia	Southbridge, MA	4 GWh	Dec 2013	Dec 2023	Solar
Southbridge Landfill Gas-to-Energy	Southbridge Recycling and Disposal Park	Southbridge, MA	12 GWh	Sep 2011	Dec 2023	Landfill Gas
Southampton Solar PV	NSTAR Electric Company	Southampton, MA	3 GWh	Jan 2019	Dec 2023	Solar
South Windsor Fuel Cell	South Energy Investments LLC	South Windsor, CT	39 GWh	Feb 2020	Dec 2023	Natural Gas
South Meadow	NAES Corp	Hartford, CT	1 GWh	Jul 1970	Dec 2022	Kerosene
Somersworth Lower Great Dam	Green Mountain Power Corp	Somersworth, NH	5 GWh	Jun 1985	Dec 2023	Water
Somerset Plant	Sappi Fine Paper North America-Somerset	Skowhegan, ME	485 GWh	Dec 1975	Aug 2024	Black Liquor : 46.4% Wood/Wood Waste Solids : 37.3% Tire-derived Fuels : 6.7% Natural Gas : 6.2% Residual Fuel Oil : 2.3% Sludge Waste : 1.0%
Somers Solar Center, LLC	Onward Energy	Somers, CT	8 GWh	Nov 2013	Dec 2023	Solar
Solten Plainville 6000, LLC	Altus Power America Management, LLC	Plainville, MA	7 GWh	Jul 2017	Dec 2023	Solar
Solar Mule, LLC	Solar Mule, LLC	Oakland, ME	2 GWh	Aug 2017	Dec 2023	Solar
Smithfield Solar Farm, LLC	Smithfield Solar Farm	Smithfield, RI	4 GWh	Jun 2020	Dec 2023	Solar
Smith & Wesson at Springfield MA PV	Luminace Solar Massachusetts, LLC	Springfield, MA	2 GWh	Jun 2017	Dec 2023	Solar
Smith (VT)	Green Mountain Power Corp	Bradford, VT	4 GWh	Nov 1982	Dec 2023	Water
Smith (NH)	Central Rivers Power NH, LLC	Berlin, NH	123 GWh	Jul 1948	Dec 2023	Water
Smith College Central Heating Plant	The Trustees of Smith College	Northampton, MA	15 GWh	Sep 2008	Dec 2023	Natural Gas
Skelton	Brookfield White Pine Hydro LLC	Dayton, ME	137 GWh	Dec 1947	Dec 2023	Water
SJA Solar LLC-Solterra Monastery CSG	SJA Solar, LLC	Spencer, MA	72 GWh	Nov 2016	Dec 2023	Solar
Silver Maple	WEB Silver Maple Wind LLC	Clifton, ME	52 GWh	Sep 2022	Dec 2023	Wind
Silver Lake (VT)	Green Mountain Power Corp	Salisbury, VT	7 GWh	Jan 1917	Dec 2023	Water
Silver Lake Solar Photovoltaic Facility	Western Massachusetts Electric Company	Pittsfield, MA	1 GWh	Nov 2010	Dec 2023	Solar
Sikorsky Aircraft CHP	Sikorsky Aircraft Corporation	Stratford, CT	64 GWh	May 2010	Dec 2023	Natural Gas : 99.9%
Signature Breads Chelsea	JDC 65R Owner, LLC	Chelsea, MA	2 MWh	Apr 2019	Dec 2023	Distillate Fuel Oil
Sidney	Nautilus Solar Solutions	Sidney, ME	1 GWh	Apr 2023	Dec 2023	Solar
Shuman Solar	NuGen Capital Management	Stoughton, MA	2 GWh	Mar 2016	Dec 2023	Solar
Shrewsbury Solar	Consolidated Edison Development Inc.	Shrewsbury, MA	4 GWh	Sep 2012	Dec 2023	Solar
Shirley Water	Altus Power America Management, LLC	Shirley, MA	3 GWh	Jul 2016	Dec 2023	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	894.0 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.0 TWh	85
#13	Duke Energy Carolinas	110.9 TWh	556
#17	Duke Energy Progress East	63.3 TWh	554
#51	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.2 TWh	20
#12	New York Independent System Operator	130.0 TWh	1,100
#1	PJM Interconnection, LLC	843.8 TWh	2,305
#31	South Carolina Public Service Authority	17.9 TWh	33
#60	Southeastern Power Administration	1.6 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	191.5 TWh	1,943
#9	Tennessee Valley Authority	157.5 TWh	170
#10	Florida Power & Light Co.	147.7 TWh	159
#12	New York Independent System Operator	130.0 TWh	1,100
#13	Duke Energy Carolinas	110.9 TWh	556
#15	ISO New England	102.8 TWh	1,487
#16	Bonneville Power Administration	80.0 TWh	158
#17	Duke Energy Progress East	63.3 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	59.0 TWh	45
#19	PacifiCorp East	52.6 TWh	204