ISO New England

Balancing Authority Summary Information

ISO New England is ranked #14 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	Jul 2025
Annual Generation	103.8 TWh
Power Plants	1,561
Utilities	814
Ranked #14 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 \| 57.2% Nuclear \| 24.5% Water \| 6.2% Other Fuel \| 4.5% Wind \| 3.7% Solar \| 1.4% 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
Skyway Avenue Solar Farm	REA Investments, LLC	Frenchville, ME	1 GWh	Feb 2024	Oct 2024	Solar
Skelton	Brookfield White Pine Hydro LLC	Dayton, ME	58 GWh	Dec 1947	Dec 2024	Water
SJA Solar LLC-Solterra Monastery CSG	SJA Solar, LLC	Spencer, MA	27 GWh	Nov 2016	Dec 2024	Solar
Silver Maple	WEB Silver Maple Wind LLC	Clifton, ME	59 GWh	Sep 2022	Dec 2024	Wind
Silver Lake (VT)	Green Mountain Power Corp	Salisbury, VT	5 GWh	Jan 1917	Dec 2024	Water
Silver Lake Solar Photovoltaic Facility	Western Massachusetts Electric Company	Pittsfield, MA	805 MWh	Nov 2010	Dec 2024	Solar
Sikorsky Aircraft CHP	Sikorsky Aircraft Corporation	Stratford, CT	53 GWh	May 2010	Dec 2024	Natural Gas : 99.8%
Signature Breads Chelsea	JDC 65R Owner, LLC	Chelsea, MA	2 MWh	Apr 2019	Dec 2023	Distillate Fuel Oil
Sidney	Nautilus Solar Solutions	Sidney, ME	2 GWh	Apr 2023	Dec 2024	Solar
Shuman Solar	NuGen Capital Management	Stoughton, MA	2 GWh	Mar 2016	Dec 2024	Solar
Shrewsbury Solar	Consolidated Edison Development Inc.	Shrewsbury, MA	4 GWh	Sep 2012	Dec 2024	Solar
Shrewsbury	Town of Shrewsbury - (MA)	Shrewsbury, MA	34 MWh	Oct 1969	Dec 2024	Distillate Fuel Oil
Shirley Water	Altus Power America Management, LLC	Shirley, MA	3 GWh	Jul 2016	Dec 2024	Solar
Shirley Landfill	Altus Power America Management, LLC	Shirley, MA	1 GWh	Apr 2017	Dec 2024	Solar
Sherman Solar	Ecos Energy LLC	Griswold, CT	1 GWh	Nov 2019	Dec 2024	Solar
Sherman	Great River Hydro, LLC	Rowe, MA	27 GWh	Nov 1926	Dec 2024	Water
Shepaug	FirstLight Power Resources Services LLC	Southbury, CT	117 GWh	Dec 1954	Dec 2024	Water
Sheldon Springs Hydroelectric	Central Rivers Power US, LLC	Sheldon Springs, VT	68 GWh	Jun 1988	Dec 2024	Water
Sheldon Solar	Excelsior Energy Capital	Sheldon Springs, VT	3 GWh	Aug 2013	Dec 2024	Solar
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	75 GWh	Sep 2011	Apr 2025	Wind
Shawmut	Brookfield White Pine Hydro LLC	Shawmut, ME	17 GWh	Dec 1912	Dec 2024	Water
Shaker	Nautilus Solar Solutions	Gray, ME	6 GWh	Jun 2022	Dec 2024	Solar
Shaffer	CD US Solar MT3, LLC	Billerica, MA	7 GWh	Aug 2014	Dec 2024	Solar
Settlers Solar	Settlers Solar, LLC	Lunenberg, MA	8 GWh	Nov 2020	Dec 2024	Solar
SEMASS Resource Recovery	SEMASS Partnership	West Wareham, MA	565 GWh	Jun 1988	Apr 2025	Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Natural Gas : 1.7%
SELCO Community Solar	Massachusetts Mun Wholes Electric Co	Shrewsbury, MA	5 GWh	May 2018	Dec 2024	Solar
Searsburg Wind Turbine	Green Mountain Power Corp	Searsburg, VT	11 GWh	May 1997	Apr 2025	Wind
Searsburg	Great River Hydro, LLC	Searsburg, VT	15 GWh	Feb 1922	Dec 2024	Water
Seabrook	NextEra Energy Seabrook LLC	Seabrook, NH	10 TWh	Jul 1990	Apr 2025	Nuclear
Seaboard Sheffield, LLC	Navisun LLC	Sheffield, MA	3 GWh	Mar 2021	Dec 2023	Solar
Seaboard Oxford, LLC	Navisun LLC	Oxford, MA	3 GWh	Jul 2020	Dec 2023	Solar
Seaboard Charlton, LLC	Navisun LLC	Charlton, MA	3 GWh	Nov 2020	Dec 2023	Solar
SCS Harpswell 012903 Brunswick, LLC	Arevon Energy, Inc.	Brunswick, ME	7 GWh	Oct 2022	Dec 2023	Solar
Scotland Dam	FirstLight Power Resources Services LLC	Windham, CT	7 GWh	Dec 1936	Dec 2024	Water
Scituate Wind	Scituate Wind LLC	Scituate, MA	2 GWh	Feb 2012	Dec 2024	Wind
Scituate PV	AES Distributed Energy	Scituate, MA	3 GWh	Sep 2013	Dec 2024	Solar
Schiller	Granite Shore Power	Portsmouth, NH	598 MWh	Sep 1952	Apr 2025	Jet Fuel
Savoy Solar PV	NSTAR Electric Company	Savoy, MA	3 GWh	Jan 2019	Dec 2024	Solar
Saratoga Solar IV, LLC	Green Street Power Partners	Rock City Falls, NY	4 GWh	Sep 2023	Dec 2024	Solar
Saratoga Solar III, LLC	Green Street Power Partners	Middle Grove, NY	6 GWh	Nov 2023	Dec 2024	Solar
Sanford Solar	Sanford Airport Solar, LLC	Sanford, ME	85 GWh	Oct 2020	Apr 2025	Solar
Sanford -NY	Nautilus Solar Solutions	Sanford, ME	7 GWh	Jan 2024	Dec 2024	Solar
Sanford CGA	Nautilus Solar Solutions	Sanford, ME	230 MWh	May 2022	Dec 2024	Solar
Sampson Road Community Solar	Sampson Road Solar, LLC	Charlton, MA	3 GWh	Nov 2017	Dec 2024	Solar
Samoset Solar	Samoset Solar, LLC	Rockport, ME	4 GWh	Jun 2023	Dec 2024	Solar
Salmon Falls	Green Mountain Power Corp	South Berwick, ME	3 GWh	Jun 1986	Dec 2024	Water
Salisbury	Green Mountain Power Corp	Salisbury, VT	2 GWh	Jan 1917	Dec 2024	Water
Salem Harbor Power Development LP	Salem Harbor Power Development LP	Salem, MA	1 TWh	Apr 2018	Apr 2025	Natural Gas
Saint Albans Solar	Cypress Creek Renewables	Georgia, VT	8 GWh	Sep 2018	Dec 2024	Solar
Saddleback Ridge Wind Farm	CPV Saddleback Ridge Wind, LLC	Carthage, ME	83 GWh	Nov 2014	Dec 2024	Wind
Sabattus SB01	Nautilus Solar Solutions	Sabattus, ME	8 GWh	Sep 2023	Dec 2024	Solar
S D Warren Westbrook	Relevate Power Management LLC	Westbrook, ME	33 GWh	Dec 1902	Dec 2023	Water
S C Moore	Great River Hydro, LLC	Littleton, NH	341 GWh	Dec 1956	Dec 2024	Water
Ryegate Associates, LLC	Ryegate Associates, LLC	East Ryegate, VT	150 GWh	Aug 1992	Dec 2024	Wood/Wood Waste Solids
Ryans Ranch	Nautilus Solar Solutions	Paris, ME	3 GWh	May 2022	Dec 2024	Solar
Ryan Road Solar LLC Hybrid(CSG)	AES Distributed Energy	North Brookfield, MA	9 GWh	Nov 2021	Dec 2024	Solar
Rutland	Green Mountain Power Corp	Rutland City, VT	84 MWh	Nov 1962	Mar 2024	Distillate Fuel Oil
Rumford Power LLC	Rumford Power	Rumford, ME	638 GWh	Jun 2000	Dec 2024	Natural Gas
Rumford Falls Hydro Facility	Brookfield Power New England	Rumford, ME	261 GWh	Dec 1917	Dec 2024	Water
Rumford Cogeneration	ND Paper, Inc.	Rumford, ME	437 GWh	Dec 1989	Apr 2025	Black Liquor : 53.6% Tire-derived Fuels : 22.6% Wood/Wood Waste Solids : 12.3% Bituminous Coal : 7.3% Residual Fuel Oil : 3.1% Sludge Waste : 1.0%
RT405 Westerlo Solar 2	RT405 Westerlo Solar 2, LLC	Albany, NY	8 GWh	Feb 2020	Dec 2024	Solar
RoxWind	RoxWind LLC	Roxbury, ME	36 GWh	Oct 2021	Dec 2024	Wind
Rowe (CSG)	AES Distributed Energy	Olean, NY	8 GWh	Oct 2021	Dec 2024	Solar
Route 57 Solar	Citizens Enterprises Corporation	Agawam, MA	2 GWh	Feb 2013	Dec 2024	Solar
Route 3 China Solar, LLC	REA Investments, LLC	China, ME	8 GWh	Nov 2022	Dec 2024	Solar
Rounseville Solar	Rounseville Solar 1, LLC	Rochester, MA	4 GWh	Jan 2020	Dec 2024	Solar
Rollinsford	Green Mountain Power Corp	Rollinsford, NH	2 GWh	Sep 1986	Dec 2024	Water
Rollins Wind Project	Evergreen Wind, LLC	Winn Village, ME	136 GWh	Jun 2011	Dec 2024	Wind
Rolfe Canal Hydro	Briar-Hydro Associates	Penacook, NH	17 GWh	Nov 1987	Dec 2024	Water
Roger Williams - Melville at Portsmouth	Luminace Solar Rhode Island, LLC	Portsmouth, RI	5 GWh	Feb 2021	Dec 2024	Solar
Rockland Solar CSG	MN8 Energy LLC	Rockland, MA	2 GWh	Nov 2013	Dec 2024	Solar
Rochester MA 2	Rochester MA 2 LLC	Rochester, MA	2 GWh	Nov 2018	Dec 2024	Solar
Robin Hollow Solar	Robin Hollow Solar, LLC	West Greenwich, RI	71 GWh	Nov 2023	Apr 2025	Solar
Robbins Lumber	Robbins Lumber Inc	Searsmont, ME	97 MWh	Dec 1980	Dec 2023	Distillate Fuel Oil
Riverside Holyoke	City of Holyoke Gas and Electric Dept.	Holyoke, MA	38 GWh	Dec 1905	Dec 2024	Water
River Road	Norridgewock River Road Solar, LLC	Norridgewock, ME	8 GWh	Feb 2022	Dec 2024	Solar
Rising Paper	Altus Power America Management, LLC	Great Barrington, MA	4 GWh	Apr 2016	Dec 2024	Solar
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	1 GWh	Jul 2005	Dec 2024	Landfill Gas
Richmond NMCA	AES Distributed Energy	Wood River Junction, RI	5 GWh	Nov 2018	Apr 2025	Solar
Richmond Hill	Greenbacker Renewable Energy Corporation	Richmond, ME	3 GWh	Nov 2023	Dec 2024	Solar
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	3 TWh	Sep 2002	Apr 2025	Natural Gas
Rhode Island Solar Renewable Energy IV,	Rhode Island Solar Renewable Energy IV, LLC	Tiverton, RI	21 GWh	Nov 2023	Dec 2024	Solar
Rhode Island Hospital	Rhode Island Hospital	Providence, RI	9 GWh	Sep 1974	Apr 2025	Natural Gas : 89.3% Residual Fuel Oil : 10.7%
RGS-Rutland VNM SREC II Project (MA)	TerraForm Solar XVII, LLC	Rutland, MA	2 GWh	Oct 2015	Dec 2024	Solar
Renew Canal 1 CSG LLC	NRG Renew Canal 1 LLC	Sandwich, MA	2 GWh	May 2017	Dec 2024	Solar
Rehoboth Solar	Citizens Enterprises Corporation	Rehoboth, MA	3 GWh	Nov 2013	Dec 2024	Solar
Regional Waste Systems	Ecomaine	Portland, ME	82 GWh	May 1988	Apr 2025	Non-biogenic Municipal Solid Waste : 54.5% Biogenic Municipal Solid Waste : 44.6% Natural Gas : 0.8%
ReEnergy Stratton LLC	ReEnergy Stratton LLC	Stratton, ME	203 GWh	Oct 1989	Dec 2024	Wood/Wood Waste Solids
ReEnergy Livermore Falls	ReEnergy Livermore Falls	Livermore Falls, ME	267 GWh	Jul 1992	Dec 2024	Wood/Wood Waste Solids
Redman South Community Solar	AES Distributed Energy	Brockport, NY	10 GWh	Jan 2022	Dec 2024	Solar
Redman North Community Solar	AES Distributed Energy	Brockport, NY	2 GWh	Jan 2022	Aug 2024	Solar
Redbrook Community Solar 1	Redbrook Solar 1, LLC	Plympton, MA	4 GWh	Sep 2017	Dec 2024	Solar
Record Hill Wind	Record Hill Wind LLC	Roxbury, ME	115 GWh	Dec 2011	Dec 2024	Wind
Ravenbrook	Captona Ravenbrook LLC	Carver, MA	7 GWh	Nov 2013	Dec 2024	Solar
Randolph	Altus Power America Management, LLC	Randolph, MA	6 GWh	Oct 2017	Dec 2024	Solar
Randall Solar Project Hybrid	AES Distributed Energy	Berlin, MA	8 GWh	Jun 2021	Dec 2024	Solar
Randall Road Solar II	Green Street Power Partners	Ballston Spa, NY	1 GWh	Jun 2024	Dec 2024	Solar
Randall Road Solar I	Green Street Power Partners	Ballston Spa, NY	2 GWh	Jun 2024	Dec 2024	Solar
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	133 GWh	Mar 2005	Apr 2025	Natural Gas
Rainbow (CT)	Farmington River Power Company	Windsor, CT	20 GWh	Nov 1925	Apr 2025	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	766.9 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.0 TWh	87
#13	Duke Energy Carolinas	111.9 TWh	565
#17	Duke Energy Progress East	65.1 TWh	558
#52	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.8 TWh	25
#12	New York Independent System Operator	130.9 TWh	1,191
#1	PJM Interconnection, LLC	860.1 TWh	2,429
#29	South Carolina Public Service Authority	19.7 TWh	34
#60	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	190.4 TWh	2,051
#8	Tennessee Valley Authority	158.5 TWh	204
#10	Florida Power & Light Co.	149.2 TWh	187
#12	New York Independent System Operator	130.9 TWh	1,191
#13	Duke Energy Carolinas	111.9 TWh	565
#14	ISO New England	103.8 TWh	1,561
#16	Bonneville Power Administration	81.2 TWh	163
#17	Duke Energy Progress East	65.1 TWh	558
#18	Salt River Project Agricultural Improvement and Power District	58.9 TWh	48
#19	PacifiCorp East	57.8 TWh	215