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	Oct 2026
Annual Generation	112.2 TWh
Power Plants	1,667
Utilities	846
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% Nuclear \| 25.3% Wind \| 5.7% Water \| 4.6% Other Fuel \| 4.5% Solar \| 1.6% Coal \| 0%

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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
Smithfield Solar Farm, LLC	Smithfield Solar Farm	Smithfield, RI	4 GWh	Jun 2020	Dec 2025	Solar
ME Novel Lighthouse - Front St. Solar CS	Luminace Sunbeam Development Holdings, LLC	Skowhegan, ME	5 GWh	Apr 2023	Dec 2025	Solar
Bates College Skowhegan	Westbound Solar 3, LLC	Skowhegan, ME	8 GWh	Aug 2023	Dec 2025	Solar
Weston Hydro	Brookfield White Pine Hydro LLC	Skowhegan, ME	57 GWh	Dec 1919	Dec 2025	Water
Somerset Plant	Sappi Fine Paper North America-Somerset	Skowhegan, ME	565 GWh	Dec 1975	Jul 2026	Black Liquor : 47.1% Wood/Wood Waste Solids : 31.7% Natural Gas : 13.0% Tire-derived Fuels : 4.1% Residual Fuel Oil : 3.4% Sludge Waste : 0.5%
DWW Solar ll	DWW Solar ll LLC	Simsbury, CT	47 GWh	Nov 2019	Jul 2026	Solar
Sidney	Nautilus Solar Solutions	Sidney, ME	2 GWh	Apr 2023	Dec 2025	Solar
SELCO Community Solar	Massachusetts Mun Wholes Electric Co	Shrewsbury, MA	5 GWh	May 2018	Dec 2025	Solar
Centech Gas Generator	Town of Shrewsbury - (MA)	Shrewsbury, MA	428 MWh	Mar 2019	Dec 2025	Natural Gas
Shrewsbury	Town of Shrewsbury - (MA)	Shrewsbury, MA	2 GWh	Oct 1969	Dec 2025	Distillate Fuel Oil
Shrewsbury Solar	RWE Clean Energy	Shrewsbury, MA	4 GWh	Sep 2012	Dec 2025	Solar
Shirley Water	Altus Power America Management, LLC	Shirley, MA	3 GWh	Jul 2016	Dec 2025	Solar
Shirley Landfill	Altus Power America Management, LLC	Shirley, MA	1 GWh	Apr 2017	Dec 2025	Solar
EBZ Solar	Citizens Enterprises Corporation	Shirley, MA	3 GWh	Dec 2012	Dec 2025	Solar
Devens	Altus Power America Management, LLC	Shirley, MA	5 GWh	May 2014	Dec 2025	Solar
Derby Hydro	McCallum Enterprises I LP	Shelton, CT	23 GWh	Dec 1988	Dec 2025	Water
Emerald Gardens PKI, LLC	Emerald Gardens PKI, LLC	Shelton, CT	2 GWh	Sep 2021	Dec 2025	Solar
Sheldon Springs Hydroelectric	Central Rivers Power US, LLC	Sheldon Springs, VT	52 GWh	Jun 1988	Dec 2025	Water
Sheldon Solar	Excelsior Energy Capital	Sheldon Springs, VT	2 GWh	Aug 2013	Dec 2025	Solar
Limerick Road Solar Farm	Limerick Road Solar, LLC	Shelburne, VT	3 GWh	Nov 2013	Dec 2025	Solar
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	57 GWh	Sep 2011	Jul 2026	Wind
Berkshire 1	PPS Berkshire Solar LLC	Sheffield, MA	2 GWh	Nov 2011	Dec 2025	Solar
Sheffield Hewins	Navisun LLC	Sheffield, MA	2 GWh	Nov 2022	Dec 2025	Solar
Seaboard Sheffield, LLC	Navisun LLC	Sheffield, MA	2 GWh	Mar 2021	Dec 2025	Solar
Shawmut	Brookfield White Pine Hydro LLC	Shawmut, ME	23 GWh	Dec 1912	Dec 2025	Water
SunGen Sharon 1 LLC	SunGen Sharon 1 LLC	Sharon, VT	2 GWh	Jul 2012	Dec 2025	Solar
1 Commercial	Madison Energy Investments LLC	Sharon, MA	622 MWh	Aug 2023	Oct 2025	Solar
Woodland Avenue Solar 1	Woodland Avenue Solar 1, LLC	Seekonk, MA	9 GWh	Jul 2020	Dec 2025	Solar
Caterpillar Hill	AES Clean Energy	Sedgwick, ME	9 GWh	Nov 2023	Dec 2025	Solar
Georges River Energy	Robbins Lumber Inc	Searsmont, ME	51 GWh	Nov 2018	Dec 2025	Wood/Wood Waste Solids
Deerfield Wind LLC	Avangrid Power LLC	Searsburg, VT	94 GWh	Nov 2017	Jul 2026	Wind
Searsburg	Great River Hydro, LLC	Searsburg, VT	16 GWh	Feb 1922	Dec 2025	Water
Searsburg Wind Turbine	Green Mountain Power Corp	Searsburg, VT	10 GWh	May 1997	Jul 2026	Wind
Seabrook	NextEra Energy Seabrook LLC	Seabrook, NH	10 TWh	Jul 1990	Jul 2026	Nuclear
Scituate PV	AES Distributed Energy	Scituate, MA	3 GWh	Sep 2013	Dec 2025	Solar
Scituate Wind	Scituate Wind LLC	Scituate, MA	3 GWh	Feb 2012	Dec 2025	Wind
BWC Beech Ridge Brook, LLC	Navisun LLC	Scarborough, ME	8 GWh	Apr 2023	Dec 2025	Solar
MEVS Waterhouse	MEVS LLC	Scarborogh, ME	3 GWh	Nov 2024	Dec 2025	Solar
Savoy Solar PV	NSTAR Electric Company	Savoy, MA	3 GWh	Jan 2019	Dec 2025	Solar
Wheelabrator Saugus	Wheelabrator Environmental Systems	Saugus, MA	182 GWh	Jul 1985	Jul 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
515 Main Saugus	515 Main Saugus LLC	Saugus, MA	2 GWh	Aug 2017	Dec 2025	Solar
Mousam River Solar	Walden Renewables Development LLC	Sanford, ME	7 GWh	Oct 2025	Dec 2025	Solar
Sanford CGA	Nautilus Solar Solutions	Sanford, ME	8 GWh	May 2022	Dec 2025	Solar
Sanford -NY	Nautilus Solar Solutions	Sanford, ME	8 GWh	Jan 2024	Dec 2025	Solar
Sanford Solar	Sanford Airport Solar, LLC	Sanford, ME	89 GWh	Oct 2020	Jul 2026	Solar
ASD Cotuit MA Solar LLC	ASD Cotuit MA Solar LLC	Sandwich, MA	4 GWh	Oct 2023	Dec 2025	Solar
Sandwich	LSE Ophiuchus LLC	Sandwich, MA	4 GWh	Jun 2023	Dec 2025	Solar
Renew Canal 1 CSG LLC	NRG Renew Canal 1 LLC	Sandwich, MA	2 GWh	May 2017	Dec 2025	Solar
Green Meadows	Altus Power America Management, LLC	Sandwich, MA	5 GWh	Apr 2014	Dec 2025	Solar
Canal	Canal Generating LLC	Sandwich, MA	467 GWh	May 1968	Jul 2026	Residual Fuel Oil : 59.3% Natural Gas : 28.9% Distillate Fuel Oil : 11.7%
Salisbury	Green Mountain Power Corp	Salisbury, VT	2 GWh	Jan 1917	Dec 2025	Water
Silver Lake (VT)	Green Mountain Power Corp	Salisbury, VT	5 GWh	Jan 1917	Dec 2025	Water
True North	CD US Solar MT1 LLC	Salisbury, MA	6 GWh	Jul 2012	Dec 2025	Solar
Salem Harbor Power Development LP	Salem Harbor Power Development LP	Salem, MA	1 TWh	Apr 2018	Jul 2026	Natural Gas
Madawaska Solar	SoCore Energy LLC	Saint David, ME	4 GWh	Nov 2024	Dec 2025	Solar
Cape Cod Air Force Station - 6 SWS	US Space Force	Sagamore, MA	6 GWh	Dec 2013	Jul 2026	Wind
Cataract Hydro	Brookfield White Pine Hydro LLC	Saco, ME	23 GWh	Dec 1936	Dec 2025	Water
Sabattus SB01	Nautilus Solar Solutions	Sabattus, ME	8 GWh	Sep 2023	Dec 2025	Solar
Cenergy - Pulk	BAP Grounded 2 LLC	Sabattus, ME	8 GWh	Nov 2024	Dec 2025	Solar
MacKinnon Solar	Ecos Energy LLC	Rutland, VT	3 GWh	Jul 2021	Dec 2025	Solar
Gray Solar	Ecos Energy LLC	Rutland, VT	3 GWh	Jul 2023	Dec 2025	Solar
Park St	Greenbacker Renewable Energy Corporation	Rutland, VT	2 GWh	Nov 2014	Dec 2025	Solar
Stafford Hill Solar Hybrid	Green Mountain Power Corp	Rutland, VT	355 MWh	Feb 2015	Jun 2026	Solar
Glen	Green Mountain Power Corp	Rutland, VT	6 GWh	Jul 1920	Dec 2025	Water
Main Street Solar Project	Greenbacker Renewable Energy Corporation	Rutland, VT	2 GWh	Nov 2014	Dec 2025	Solar
Golden Hills Solar	Golden Hills Solar, LLC	Rutland, MA	7 GWh	Aug 2017	Dec 2025	Solar
Pleasantdale Road Community Solar	Pleasantdale Road Solar, LLC	Rutland, MA	1 GWh	Aug 2017	Dec 2025	Solar
RGS-Rutland VNM SREC II Project (MA)	TerraForm Solar XVII, LLC	Rutland, MA	3 GWh	Oct 2015	Dec 2025	Solar
Upper Blackstone (MA) Treasure Valley	Nexamp Treasure Valley Solar, LLC	Rutland, MA	6 GWh	Jun 2014	Dec 2025	Solar
Wachusett Solar	Wachusett Solar, LLC	Rutland, MA	3 GWh	Jul 2019	Dec 2025	Solar
Indian River Hydro	Eagle Creek Renewable Energy, LLC	Russell, MA	2 GWh	Nov 1909	Dec 2025	Water
Russell (MA)	Sunrise on Blandford Rd. LLC	Russell, MA	5 GWh	Oct 2020	Dec 2025	Solar
Holiday Hill Community Wind	Greenbacker Renewable Energy Corporation	Russell, MA	12 GWh	Nov 2019	Dec 2025	Wind
Texon Hydroelectric Project	Hitchcock Hydro, LLC	Russell, MA	4 GWh	Dec 1981	Dec 2025	Water
Rumford Power LLC	Rumford Power	Rumford, ME	793 GWh	Jun 2000	Dec 2025	Natural Gas
Rumford Cogeneration	ND Paper, Inc.	Rumford, ME	401 GWh	Dec 1989	Jul 2026	Black Liquor : 54.2% Tire-derived Fuels : 20.8% Wood/Wood Waste Solids : 16.7% Bituminous Coal : 6.0% Residual Fuel Oil : 1.1% Natural Gas : 0.6% Sludge Waste : 0.6%
Rumford Falls Hydro Facility	Brookfield Power New England	Rumford, ME	212 GWh	Dec 1917	Dec 2025	Water
Mainely Solar (Wyman Hill Solar LLC)	Wyman Hill Solar, LLC	Rumford, ME	6 GWh	Nov 2022	Dec 2025	Solar
RoxWind	RoxWind LLC	Roxbury, ME	44 GWh	Oct 2021	Dec 2025	Wind
Record Hill Wind	Record Hill Wind LLC	Roxbury, ME	110 GWh	Dec 2011	Dec 2025	Wind
Sherman	Great River Hydro, LLC	Rowe, MA	28 GWh	Nov 1926	Dec 2025	Water
700 Binnewater	Madison Energy Investments LLC	Rosendale, NY	2 GWh	Aug 2022	Dec 2025	Solar
Rollinsford	Green Mountain Power Corp	Rollinsford, NH	3 GWh	Sep 1986	Dec 2025	Water
Town of Rocky Hill PV CSG	Tesla Inc.	Rocky Hill, CT	5 GWh	Feb 2018	Dec 2025	Solar
Brassua Hydroelectric Project	Brassua Hydroelectric LP	Rockwood, ME	13 GWh	Aug 1989	Aug 2025	Water
BWC Maces Pond LLC	Navisun LLC	Rockport, ME	4 GWh	Nov 2021	Dec 2025	Solar
Samoset Solar	Samoset Solar, LLC	Rockport, ME	4 GWh	Jun 2023	Dec 2025	Solar
Rockland Solar CSG	MN8 Energy LLC	Rockland, MA	2 GWh	Nov 2013	Dec 2025	Solar
Saratoga Solar IV, LLC	Green Street Power Partners	Rock City Falls, NY	5 GWh	Sep 2023	Dec 2025	Solar
Turnkey Landfill Gas Recovery	WM Renewable Energy LLC	Rochester, NH	39 GWh	Jan 1992	Dec 2025	Landfill Gas
Quittacas Pond Solar	RWE Clean Energy	Rochester, MA	5 GWh	Nov 2013	Dec 2025	Solar
Rounseville Solar	Rounseville Solar 1, LLC	Rochester, MA	4 GWh	Jan 2020	Dec 2025	Solar
Old Middleboro Road Solar	Agilitas Energy, Inc.	Rochester, MA	8 GWh	Dec 2022	Dec 2025	Solar
Rochester MA 2	Rochester MA 2 LLC	Rochester, MA	1 GWh	Nov 2018	Dec 2025	Solar
GMP Solar - Richmond	Green Mountain Power Corp	Richmond, VT	3 GWh	Sep 2016	Jul 2026	Solar
WED Stilson Solar	CleanCapital Holdings	Richmond, RI	3 GWh	Nov 2017	Dec 2025	Solar
WED Kingstown Solar I, LLC - West	CleanCapital Holdings	Richmond, RI	2 GWh	Nov 2017	Dec 2025	Solar
GD Richmond Buttonwoods I, LLC	CleanCapital Holdings	Richmond, RI	2 GWh	Nov 2019	Dec 2025	Solar
GD Richmond Beaver River I LLC	GD Richmond Beaver River I LLC	Richmond, RI	6 GWh	Mar 2025	Dec 2025	Solar
Richmond Hill	Greenbacker Renewable Energy Corporation	Richmond, ME	3 GWh	Nov 2023	Dec 2025	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	433.0 GWh	4
#24	Dominion Energy South Carolina, Inc.	26.1 TWh	83
#13	Duke Energy Carolinas	113.4 TWh	578
#17	Duke Energy Progress East	66.2 TWh	574
#50	Duke Energy Progress West	4.6 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	34.2 TWh	25
#12	New York Independent System Operator	134.1 TWh	1,334
#1	PJM Interconnection, LLC	890.9 TWh	2,806
#28	South Carolina Public Service Authority	19.6 TWh	35
#59	Southeastern Power Administration	1.2 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	168.7 TWh	2,170
#9	Tennessee Valley Authority	166.2 TWh	209
#10	Florida Power & Light Co.	153.0 TWh	188
#12	New York Independent System Operator	134.1 TWh	1,334
#13	Duke Energy Carolinas	113.4 TWh	578
#15	ISO New England	112.2 TWh	1,667
#16	Bonneville Power Administration	91.1 TWh	170
#17	Duke Energy Progress East	66.2 TWh	574
#18	PacifiCorp East	61.4 TWh	223
#19	Salt River Project Agricultural Improvement and Power District	60.5 TWh	51