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 2025
Annual Generation	105.5 TWh
Power Plants	1,577
Utilities	819
Ranked #15 out of 65 in terms of net annual generation
Ranked #12 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 55.8% Nuclear \| 26% Water \| 5% Other Fuel \| 4.4% Wind \| 4% Solar \| 1.5% 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
VEC Magee Hill Solar	SoCore Energy LLC	Hinesburgh, VT	2 GWh	Oct 2017	Dec 2024	Solar
Smithfield Solar Farm, LLC	Smithfield Solar Farm	Smithfield, RI	4 GWh	Jun 2020	Dec 2024	Solar
TES Rowtier	SkyHigh 2 Solar	Westminster, MA	5 GWh	Mar 2021	Dec 2024	Solar
SJA Solar LLC-Solterra Monastery CSG	SJA Solar, LLC	Spencer, MA	27 GWh	Nov 2016	Dec 2024	Solar
Hillsborough Hosiery	Silverstreet Hydro	Hillsboro, NH	2 GWh	Nov 1989	Dec 2024	Water
Sikorsky Aircraft CHP	Sikorsky Aircraft Corporation	Stratford, CT	53 GWh	May 2010	Dec 2024	Natural Gas : 99.8%
ME - EDF - Phase II - Belfast	Shining Solar Partners, LLC	Belfast, ME	427 MWh	Aug 2024	Dec 2024	Solar
Milton Hydro	SFR Hydro Cor	Milton, NH	6 GWh	Dec 1913	Dec 2024	Water
Settlers Solar	Settlers Solar, LLC	Lunenberg, MA	8 GWh	Nov 2020	Dec 2024	Solar
SEMASS Resource Recovery	SEMASS Partnership	West Wareham, MA	569 GWh	Jun 1988	Sep 2025	Non-biogenic Municipal Solid Waste : 54.1% Biogenic Municipal Solid Waste : 44.3% Natural Gas : 1.5%
Hardwick-Athol & Eagle Hill	SEC CRSD Solar One, LLC	Hardwick, MA	3 GWh	Jun 2015	Dec 2024	Solar
Scituate Wind	Scituate Wind LLC	Scituate, MA	2 GWh	Feb 2012	Dec 2024	Wind
Somerset Plant	Sappi Fine Paper North America-Somerset	Skowhegan, ME	573 GWh	Dec 1975	Sep 2025	Black Liquor : 46.2% Wood/Wood Waste Solids : 38.4% Natural Gas : 6.9% Tire-derived Fuels : 5.1% Residual Fuel Oil : 2.5% Sludge Waste : 0.8%
Sanford Solar	Sanford Airport Solar, LLC	Sanford, ME	88 GWh	Oct 2020	Sep 2025	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
Salem Harbor Power Development LP	Salem Harbor Power Development LP	Salem, MA	2 TWh	Apr 2018	Sep 2025	Natural Gas
Ryegate Associates, LLC	Ryegate Associates, LLC	East Ryegate, VT	150 GWh	Aug 1992	Dec 2024	Wood/Wood Waste Solids
Rumford Power LLC	Rumford Power	Rumford, ME	638 GWh	Jun 2000	Dec 2024	Natural Gas
RT405 Westerlo Solar 2	RT405 Westerlo Solar 2, LLC	Albany, NY	8 GWh	Feb 2020	Dec 2024	Solar
Alexander Road Solar	RPNY Solar 7, LLC	Batavia, NY	943 MWh	Jun 2024	Dec 2024	Solar
Pike Road Solar (NY)	RPNY Solar 6, LLC	Batavia, NY	2 GWh	Jun 2024	Dec 2024	Solar
Clemons Road Solar	RPNY Solar 4, LLC	Minoa, NY	1 GWh	Jun 2024	Dec 2024	Solar
RoxWind	RoxWind LLC	Roxbury, ME	36 GWh	Oct 2021	Dec 2024	Wind
Rounseville Solar	Rounseville Solar 1, LLC	Rochester, MA	4 GWh	Jan 2020	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	70 GWh	Nov 2023	Sep 2025	Solar
Georges River Energy	Robbins Lumber Inc	Searsmont, ME	52 GWh	Nov 2018	Dec 2024	Wood/Wood Waste Solids
Robbins Lumber	Robbins Lumber Inc	Searsmont, ME	97 MWh	Dec 1980	Dec 2023	Distillate Fuel Oil
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	3 TWh	Sep 2002	Sep 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
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	1 GWh	Jul 2005	Dec 2024	Landfill Gas
Johnston LFG Turbine Plant	Rhode Island LFG Genco	Johnston, RI	149 GWh	Apr 2013	Sep 2025	Landfill Gas
Rhode Island Hospital	Rhode Island Hospital	Providence, RI	8 GWh	Sep 1974	Sep 2025	Natural Gas : 86.8% Residual Fuel Oil : 13.2%
Alton Road Solar	Revity Energy LLC	Bradford, RI	24 GWh	Nov 2019	Dec 2024	Solar
S D Warren Westbrook	Relevate Power Management LLC	Westbrook, ME	33 GWh	Dec 1902	Dec 2023	Water
Collins Facility	Relevate Power Management LLC	Wilbraham, MA	7 GWh	Feb 1985	Dec 2023	Water
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
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
Washburn Road Solar	REA Investments, LLC	Freetown, MA	3 GWh	Nov 2018	Dec 2024	Solar
Happy Hollow CSG Hybrid	REA Investments, LLC	Winchendon, MA	9 GWh	Sep 2019	Dec 2024	Solar
Ward Solar 1, LLC	REA Investments, LLC	Carver, MA	3 GWh	Jan 2019	Dec 2024	Solar
Skyway Avenue Solar Farm	REA Investments, LLC	Frenchville, ME	1 GWh	Feb 2024	Oct 2024	Solar
Route 3 China Solar, LLC	REA Investments, LLC	China, ME	8 GWh	Nov 2022	Dec 2024	Solar
Augusta Road Bowdoin Solar, LLC	REA Investments, LLC	Bowdoin, ME	5 GWh	Jan 2022	Dec 2024	Solar
Perkins Road Belfast Solar, LLC	REA Investments, LLC	Belfast, ME	9 GWh	May 2021	Dec 2024	Solar
Canton GLC Solar, LLC	REA Investments, LLC	Canton, ME	4 GWh	Mar 2024	Dec 2024	Solar
Church Hill Road Augusta Solar, LLC	REA Investments, LLC	Augusta, ME	6 GWh	Jan 2022	Dec 2024	Solar
Nutting Ridge Solar, LLC	REA Investments, LLC	Otisfield, ME	6 GWh	May 2023	Dec 2024	Solar
Plympton Lake Street Solar	REA Investments, LLC	Plympton, MA	2 GWh	Nov 2022	Dec 2024	Solar
Mariaville Road Elsworth Solar, LLC	REA Investments, LLC	Ellsworth, ME	3 GWh	Apr 2022	Dec 2024	Solar
Plympton Main Street Solar, LLC	REA Investments, LLC	Plympton, MA	8 GWh	Nov 2023	Dec 2024	Solar
North Nobleboro Road, LLC	REA Investments, LLC	Waldoboro, ME	4 GWh	May 2021	Dec 2024	Solar
Market Street Gardiner Solar, LLC	REA Investments, LLC	Gardiner, ME	6 GWh	Jun 2022	Dec 2024	Solar
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	135 GWh	Mar 2005	Sep 2025	Natural Gas
Quinebaug Solar	Quinebaug Solar, LLC	Canterbury, CT	81 GWh	Nov 2021	Sep 2025	Solar
Quinebaug Lower Project	Quinebaug Associates LLC	Brooklyn, CT	6 GWh	Mar 1990	Dec 2024	Water
Williams College - Campus CHP	President & Trustees of Williams College	Williamstown, MA	1 GWh	Feb 2003	Dec 2024	Natural Gas : 84.0% Distillate Fuel Oil : 16.0%
Berkshire 1	PPS Berkshire Solar LLC	Sheffield, MA	2 GWh	Nov 2011	Dec 2024	Solar
ALDI DC 2	Powerflex	South Windsor, CT	1 GWh	Jan 2018	Dec 2024	Solar
Corbin Russwin Phase 3 Berlin	Powerflex	Berlin, CT	2 GWh	Mar 2018	Dec 2024	Solar
Ticket Network South Windsor	Powerflex	South Windsor, CT	2 GWh	Apr 2018	Dec 2024	Solar
Pontook Hydro Facility	Pontook Operating LP	Dummer, NH	62 GWh	Nov 1986	Dec 2024	Water
Pleasantdale Road Community Solar	Pleasantdale Road Solar, LLC	Rutland, MA	1 GWh	Aug 2017	Dec 2024	Solar
Plainfield Community Solar LLC	Plainfield Solar LLC	Plainfield, MA	3 GWh	Jan 2019	Dec 2024	Solar
Plainfield Renewable Energy LLC	Plainfield Renewable Energy, LLC	Plainfield, CT	247 GWh	Nov 2013	Oct 2024	Wood/Wood Waste Solids : 99.5% Other Biomass Liquids : 0.5%
Pittsfield Solar LLC	Pittsfiled Solar LLC	Pittsfield, ME	17 GWh	Nov 2017	Dec 2024	Solar
Pittsfield Generating LP	Pittsfield Generating Company, LP	Pittsfield, MA	123 GWh	Jun 1990	Sep 2025	Natural Gas : 98.6% Distillate Fuel Oil : 1.4%
Pisgah Mountain Wind	Pisgah Mountain, LLC	Clifton, ME	25 GWh	Nov 2016	Dec 2024	Wind
Pfizer Groton Plant	Pfizer Inc	Groton, CT	78 GWh	Dec 1947	Sep 2025	Natural Gas : 91.4% Distillate Fuel Oil : 8.6%
Peterson Road Solar	Peterson Road Solar, LLC	Palmer, MA	4 GWh	Mar 2017	Dec 2024	Solar
Pepperidge Farm Bloomfield	Pepperidge Farm, Inc.- Bloomfield	Bloomfield, CT	15 GWh	Jul 2008	Dec 2024	Natural Gas
Pendleton Solar 1	Pendleton Solar 1, LLC	Lockport, NY	8 GWh	Sep 2020	Dec 2024	Solar
Partridgeville Hybrid CSG	Partridgeville Road Solar 1, LLC	Athol, MA	6 GWh	Dec 2019	Dec 2024	Solar
ME - EDFR - Phase I - Bristol	Overlook Solar Partners, LLC	Bristol, ME	6 GWh	Nov 2023	Nov 2024	Solar
Gardner - Otter River Road	Otter River Road Solar LLC	Gardner, MA	4 GWh	Sep 2019	Dec 2024	Solar
MA Solar Storage 1 Hybrid	Origis Energy USA, Inc	Sterling, MA	1 GWh	Feb 2018	Dec 2024	Solar
Onyx - Brockton Thatcher Landfill Solar	Onyx Asset Services Group	Brockton, MA	5 GWh	Oct 2017	Dec 2024	Solar
Onyx - Pembroke Landfill Solar	Onyx Asset Services Group	Pembroke, MA	3 GWh	Nov 2017	Dec 2024	Solar
Manchester Community College East	Onyx Asset Services Group	Manchester, CT	2 GWh	Sep 2018	Dec 2024	Solar
Manchester Community College North	Onyx Asset Services Group	Great Path, CT	1 GWh	Sep 2018	Dec 2024	Solar
Barrett Farm Solar - Phase I	Onyx Asset Services Group	Thompson, CT	3 GWh	Sep 2017	Dec 2024	Solar
Winchendon Landfill Solar	Onyx Asset Services Group	Winchendon, MA	3 GWh	Sep 2018	Dec 2024	Solar
Ellington - 277 Sadds Mill	Onyx Asset Services Group	Ellington, CT	3 GWh	Feb 2024	Dec 2024	Solar
Somers Solar Center, LLC	Onward Energy	Somers, CT	9 GWh	Nov 2013	Dec 2024	Solar
Hancock Wind Plant	Onward Energy	T22 MD, ME	121 GWh	Nov 2016	Sep 2025	Wind
Oakfield Wind Project	Onward Energy	City of Oakfield, ME	367 GWh	Sep 2015	Sep 2025	Wind
Bingham Wind	Onward Energy	Bingham, ME	489 GWh	Nov 2016	Sep 2025	Wind
Old Frontier Solar III	Old Frontier Solar III PV, LLC	South Deerfield, MA	4 GWh	Aug 2022	Dec 2024	Solar
Covanta Haverhill	Ogden Projects Inc-Haverhill	Haverhill, MA	226 GWh	Apr 1989	Sep 2025	Non-biogenic Municipal Solid Waste : 52.2% Biogenic Municipal Solid Waste : 42.7% Distillate Fuel Oil : 5.1%
Ocean State Power II	Ocean State Power II	Harrisville, RI	897 GWh	Sep 1991	Dec 2024	Natural Gas : 99.9%
Ocean State Power	Ocean State Power Co	Harrisville, RI	1 TWh	Nov 1990	Dec 2024	Natural Gas : 99.9%
Bourne (MA) - Holliston I	NVT LICENSES, LLC	Holliston, MA	4 GWh	Nov 2014	Dec 2024	Solar
Nutmeg Solar	Nutmeg Solar LLC	Enfield, CT	34 GWh	Nov 2020	Dec 2024	Solar
Vuelta Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2024	Solar
265 Pleasant Solar NG, LLC	NuGen Capital Management	Lunenburg, MA	1 GWh	Jun 2014	Dec 2024	Solar
East Acres Solar NG, LLC	NuGen Capital Management	Pittsfield, MA	5 GWh	Mar 2017	Dec 2024	Solar
301 Chestnut Solar NG	NuGen Capital Management	East Longmeadow, MA	2 GWh	Mar 2017	Dec 2024	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	696.7 GWh	4
#25	Dominion Energy South Carolina, Inc.	25.7 TWh	87
#13	Duke Energy Carolinas	112.5 TWh	565
#17	Duke Energy Progress East	64.3 TWh	559
#52	Duke Energy Progress West	4.3 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.4 TWh	25
#12	New York Independent System Operator	131.6 TWh	1,211
#1	PJM Interconnection, LLC	870.7 TWh	2,465
#30	South Carolina Public Service Authority	18.9 TWh	34
#59	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	188.0 TWh	2,075
#9	Tennessee Valley Authority	161.6 TWh	204
#10	Florida Power & Light Co.	148.9 TWh	187
#12	New York Independent System Operator	131.6 TWh	1,211
#13	Duke Energy Carolinas	112.5 TWh	565
#15	ISO New England	105.5 TWh	1,577
#16	Bonneville Power Administration	80.5 TWh	163
#17	Duke Energy Progress East	64.3 TWh	559
#18	PacifiCorp East	61.1 TWh	216
#19	Salt River Project Agricultural Improvement and Power District	60.0 TWh	48