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	Jul 2026
Annual Generation	111.1 TWh
Power Plants	1,629
Utilities	833
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 \| 54.9% Nuclear \| 25% Wind \| 5.1% Water \| 4.5% Other Fuel \| 4.4% Solar \| 1.6% Coal \| 0.1%

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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
Ashby Solar, LLC CSG	Ashby Solar, LLC	Fitchburg, MA	3 GWh	Jun 2018	Dec 2025	Solar
Dudley Solar CSG	Dudley Solar, LLC	Dudley, MA	3 GWh	Jul 2017	Dec 2025	Solar
Williamsburg	AES Distributed Energy	Goshen, MA	6 GWh	Jun 2019	Dec 2025	Solar
Monson Solar, LLC	Monson Solar, LLC	Monson, MA	3 GWh	Jul 2017	Dec 2025	Solar
Westminster Renewables, LLC CSG	Westminster Renewables, LLC	Westminster, MA	2 GWh	Sep 2018	Dec 2025	Solar
Pittsfield 44 - M&W PV	NSTAR Electric Company	Pittsfield, MA	2 GWh	Jul 2018	Dec 2025	Solar
Lee Site 31 Solar	NSTAR Electric Company	Lee, MA	149 MWh	Jul 2018	Dec 2025	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	2 GWh	May 2018	Dec 2025	Solar
North Stonington Solar Center, LLC	Adapture Renewables, Inc.	North Stonington, CT	32 GWh	Sep 2022	Dec 2025	Solar
Dynamic - Walpole	AES Distributed Energy	Walpole, MA	2 GWh	May 2017	Dec 2025	Solar
Barre Solar III LLC	AES Distributed Energy	Barre, MA	1 GWh	Feb 2018	Dec 2025	Solar
BWC Origination 18	BWC Origination 18, LLC	Mattapoisett, MA	7 GWh	Nov 2018	Dec 2025	Solar
BWC Gibbs Brook	BWC Gibbs Brook, LLC	Wareham, MA	7 GWh	Nov 2018	Dec 2025	Solar
BWC Wareham River	BWC Wareham River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Harlow Brook	BWC Harlow Brook, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Pocasset River	BWC Pocasset River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
Westminster	MN8 Energy LLC	Westminster, VT	2 GWh	Nov 2016	Dec 2025	Solar
Kearsarge GB	Kearsarge GB LLC	Great Barrington, MA	3 GWh	Jul 2018	Dec 2025	Solar
Kearsarge William Way	Kearsarge William Way LLC	Bellingham, MA	7 GWh	Nov 2021	Dec 2025	Solar
Amaterasu LLC	AES Distributed Energy	Lancaster, MA	7 GWh	May 2021	Dec 2025	Solar
28 Livermore Hill Road Solar	28 Livermore Hill Road Solar, LLC	Westminster, MA	7 GWh	May 2020	Dec 2025	Solar
Montague Road Solar	Montague Road Solar, LLC	Amherst, MA	4 GWh	Nov 2019	Dec 2025	Solar
Fitchburg Renewables	Fitchburg Renewables, LLC	Fitchburg, MA	6 GWh	Feb 2020	Dec 2025	Solar
SELCO Community Solar	Massachusetts Mun Wholes Electric Co	Shrewsbury, MA	5 GWh	May 2018	Dec 2025	Solar
Palmyra PV - BD Solar Palmyra LLC	BD Solar Palmyra LLC	Palmyra, ME	8 GWh	May 2022	Dec 2025	Solar
BD Solar Hancock LLC	BD Solar Hancock LLC	Augusta, ME	11 GWh	May 2022	Dec 2025	Solar
Winslow PV - BD Solar 2 LLC	BD Solar 2 LLC	Winslow, ME	10 GWh	Jun 2022	Dec 2025	Solar
BD Solar Ellsworth LLC	BD Solar Hancock North LLC	Augusta, ME	9 GWh	May 2022	Dec 2025	Solar
Pittsfield Solar LLC	Pittsfiled Solar LLC	Pittsfield, ME	15 GWh	Nov 2017	Dec 2025	Solar
North Providence	Captona N.P. LLC	North Providence, RI	3 GWh	Sep 2018	Dec 2025	Solar
Canton	Captona Canton LLC	Canton, MA	6 GWh	Jul 2012	Dec 2025	Solar
Gold Meadow Farms	Captona Lippitt Ave Cranston LLC	Cranston, RI	27 GWh	Apr 2019	Dec 2025	Solar
Ravenbrook	Captona Ravenbrook LLC	Carver, MA	6 GWh	Nov 2013	Dec 2025	Solar
Hudson	Captona Hudson LLC	Hudson, MA	5 GWh	Apr 2017	Dec 2025	Solar
A Street 2	Captona A Street 2 Johnston LLC	Johnston, RI	3 GWh	Nov 2018	Dec 2025	Solar
Berkley	Captona Berkley LLC	Berkley, MA	4 GWh	Mar 2017	Dec 2025	Solar
Kilvert	Captona Kilvert Street Warwick LLC	Warwick, RI	8 GWh	Nov 2018	Dec 2025	Solar
A Street 1	Captona A Street 1 Johnston LLC	Johnston, RI	2 GWh	Nov 2018	Dec 2025	Solar
Carver	Captona Carver LLC	North Carver, MA	2 GWh	Apr 2017	Dec 2025	Solar
Plainfield Pike	Captona Plainfield Pike Johnston LLC	Johnston, RI	4 GWh	May 2019	Dec 2025	Solar
Chicopee	Captona Chicopee LLC	Chicopee, MA	2 GWh	Mar 2017	Dec 2025	Solar
Kenmare - Mansfield Branch Street	MN8 Energy LLC	Mansfield, MA	2 GWh	May 2017	Dec 2025	Solar
BWC Stony Brook, LLC Hybrid	AES Distributed Energy	Chelmsford, MA	2 GWh	Jun 2021	Dec 2025	Solar
ZPD-PT Solar Project 2017-038 Hybrid LLC	AES Distributed Energy	Lancaster, MA	8 GWh	Mar 2021	Dec 2025	Solar
SR North Stonington	SR North Stonington, LLC	North Stonington, CT	15 GWh	Feb 2024	Dec 2025	Solar
SR Litchfield	SR Litchfield, LLC	Litchfield, CT	26 GWh	Jan 2025	Dec 2025	Solar
Newton Rumford Landfill	Newton Municipal Solar LLC - Rumford	Newton, MA	2 GWh	Jun 2017	Dec 2025	Solar
BWC Muddy Brook, LLC Hybrid	AES Distributed Energy	Mendon, MA	2 GWh	Aug 2021	Dec 2025	Solar : 99.8%
BWC Lake Lashaway, LLC Hybrid	AES Distributed Energy	North Brookfield, MA	8 GWh	Apr 2021	Dec 2025	Solar : 99.4% Electricity used for energy storage : 0.6%
ZPD-PT Solar Project 2017-044 LLC CSG	AES Distributed Energy	Spencer, MA	812 MWh	Sep 2021	Dec 2025	Solar
ZPD-PT Solar Project 2017-023 LLC Hybrid	AES Distributed Energy	Southbridge, MA	4 GWh	Dec 2020	Dec 2025	Solar : 99.9%
ZPD-PT Solar Project 2017-021 LLC Hybrid	AES Distributed Energy	Wilbraham, MA	2 GWh	Dec 2020	Dec 2025	Solar
Auburn Solar Project	Agilitas Energy, Inc.	Auburn, MA	8 GWh	Apr 2022	Dec 2025	Solar
Blair Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2025	Solar
Madison Solar (CT)	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2025	Solar
Few Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2025	Solar
Hadley 3 Solar (North)	Hadley 3 Solar, LLC (North)	Hadley, MA	3 GWh	Nov 2019	Dec 2025	Solar
Hadley 3 Solar (South)	Hadley 3 Solar, LLC (South)	Hadley, MA	3 GWh	Nov 2019	Dec 2025	Solar
Lawrence Brook	Greenbacker Renewable Energy Corporation	Morristown, VT	3 GWh	Nov 2020	Dec 2025	Solar
Roger Williams - Melville at Portsmouth	Luminace Solar Rhode Island, LLC	Portsmouth, RI	5 GWh	Feb 2021	Dec 2025	Solar
WED Coventry Seven, LLC	WED Coventry Seven, LLC	Coventry, RI	5 GWh	Nov 2020	Dec 2025	Solar
GD Glocester White Oak I, LLC	GD Glocester White Oak I, LLC	Glocester, RI	3 GWh	Nov 2020	Dec 2025	Solar
Plainfield Solar 1	Ecos Energy LLC	Plainfield, CT	2 GWh	Dec 2019	Dec 2025	Solar
ZPD-PT Solar Project 2017-006 LLC Hybrid	AES Distributed Energy	Warren, MA	6 GWh	Jun 2021	Dec 2025	Solar
Wilbraham	BWC East Brook, LLC	Wilbraham, MA	6 GWh	Nov 2020	Dec 2025	Solar
Elm Street	ISM Solar Dighton 3, LLC	Dighton, MA	5 GWh	Nov 2020	Dec 2025	Solar
Rounseville Solar	Rounseville Solar 1, LLC	Rochester, MA	4 GWh	Jan 2020	Dec 2025	Solar
Dresser Hill CSG	Dresser Hill Solar, LLC	Southbridge, MA	6 GWh	Dec 2020	Dec 2025	Solar
Golden Solar	Cardinal Renewables	St. Johnsbury, VT	4 GWh	Oct 2021	Dec 2025	Solar
Merrimack Solar Farm, LLC	Merrimack Solar Farm	Merrimack, NH	3 GWh	Dec 2018	Dec 2025	Solar
Raboth - Marion Drive	Madison Energy Holdings LLC	Kingston, MA	4 GWh	Feb 2021	Dec 2025	Solar
Norton	Madison Energy Holdings LLC	Norton, MA	2 GWh	Feb 2023	Dec 2025	Solar
Smithfield Solar Farm, LLC	Smithfield Solar Farm	Smithfield, RI	4 GWh	Jun 2020	Dec 2025	Solar
Wallingford Solar	Wallingford Renewable Energy, LLC	Wallingford, CT	15 GWh	Aug 2021	Dec 2025	Solar
Dudley	AMP MA Dudley	Dudley, MA	8 GWh	Jun 2018	Dec 2025	Solar
Westport B Community Solar Garden	BWC Hamilton Brook LLC	Westport, MA	8 GWh	Oct 2018	Dec 2025	Solar
TPE King Solar Holdings1, LLC (CSG)	Nautilus Solar Solutions	North Smithfield, RI	18 GWh	Mar 2022	Dec 2025	Solar
ER Bone Hill Solar, LLC	Altus Power America Management, LLC	Northfield, VT	2 GWh	Aug 2022	Dec 2025	Solar
ER Salvage Yard	Altus Power America Management, LLC	Morrisville, VT	3 GWh	Oct 2021	Dec 2025	Solar
Park St	Greenbacker Renewable Energy Corporation	Rutland, VT	2 GWh	Nov 2014	Dec 2025	Solar
Torrington Solar One, LLC	DG Connecticut III, LLC	Torrington, CT	3 GWh	Feb 2021	Dec 2025	Solar
Bristol Solar One, LLC	DG Connecticut III, LLC	Bristol, CT	5 GWh	Apr 2021	Dec 2025	Solar
Watertown Solar One, LLC	DG Connecticut III, LLC	Watertown, CT	3 GWh	May 2021	Dec 2025	Solar
UMass Boston	MSS Energy Holdings, LLC (d.b.a. Calibrant Energy)	Dorchester, MA	1 GWh	Dec 1971	Dec 2025	Solar
FedEx Middletown	VCP Realty, LLC	Middletown, CT	2 GWh	Oct 2024	Dec 2025	Solar
Enfield Solar One	Enfield Solar One, LLC	Hartford, CT	8 GWh	Mar 2024	Dec 2025	Solar
Halifax Solar	NuGen Capital Management	Halifax, MA	4 GWh	Jul 2015	Dec 2025	Solar
580 River Solar	NuGen Capital Management	Winchendon, MA	4 GWh	Aug 2018	Dec 2025	Solar
115 G Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Sep 2015	Dec 2025	Solar
154 D Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Nov 2015	Dec 2025	Solar
North Haven Solar One	North Haven Solar One, LLC	North Haven, CT	3 GWh	Feb 2024	Dec 2025	Solar
River Road	Norridgewock River Road Solar, LLC	Norridgewock, ME	8 GWh	Feb 2022	Dec 2025	Solar
Norton LLC	Greenbacker Renewable Energy Corporation	Norton, MA	1 GWh	Aug 2020	Dec 2025	Solar
Charlemont A	Agilitas Energy, Inc.	Charlemont, MA	3 GWh	Aug 2021	Dec 2025	Solar
Woburn	Greenbacker Renewable Energy Corporation	Woburn, MA	2 GWh	Nov 2020	Dec 2025	Solar
Equinix - Billerica	Bloom Energy	Billerica, MA	14 GWh	Aug 2021	Dec 2025	Natural Gas
Medtronic - New Haven	Bloom Energy	North Haven, CT	18 GWh	Sep 2020	Dec 2025	Natural Gas
Medtronic - New Haven 2	Bloom Energy	North Haven, CT	17 GWh	Sep 2020	Dec 2025	Natural Gas
Holliston LLC	Greenbacker Renewable Energy Corporation	Holliston, MA	2 GWh	Sep 2020	Dec 2025	Solar
UMass PV Lot 22	RWE Clean Energy	Amherst, MA	3 GWh	Aug 2022	Dec 2025	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	442.5 GWh	4
#24	Dominion Energy South Carolina, Inc.	25.3 TWh	83
#13	Duke Energy Carolinas	112.6 TWh	577
#17	Duke Energy Progress East	64.5 TWh	565
#50	Duke Energy Progress West	4.5 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	33.9 TWh	25
#12	New York Independent System Operator	134.3 TWh	1,299
#1	PJM Interconnection, LLC	882.8 TWh	2,652
#31	South Carolina Public Service Authority	18.5 TWh	35
#59	Southeastern Power Administration	1.3 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	169.4 TWh	2,135
#9	Tennessee Valley Authority	163.4 TWh	207
#10	Florida Power & Light Co.	152.2 TWh	187
#12	New York Independent System Operator	134.3 TWh	1,299
#13	Duke Energy Carolinas	112.6 TWh	577
#15	ISO New England	111.1 TWh	1,629
#16	Bonneville Power Administration	91.6 TWh	167
#17	Duke Energy Progress East	64.5 TWh	565
#18	PacifiCorp East	60.9 TWh	222
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	49