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	Jun 2025
Annual Generation	103.1 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 \| 57.2% Nuclear \| 24.7% Water \| 6.2% Other Fuel \| 4.5% Wind \| 3.7% Solar \| 1.4% Coal \| 0.3%

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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
Rail Trail	Altus Power America Management, LLC	Great Barrington, MA	3 GWh	Apr 2016	Dec 2023	Solar
Rising Paper	Altus Power America Management, LLC	Great Barrington, MA	3 GWh	Apr 2016	Dec 2023	Solar
Hampden	Altus Power America Management, LLC	Hampden, MA	5 GWh	Jun 2015	Dec 2023	Solar
Little Bay	Altus Power America Management, LLC	Providence, RI	1 GWh	Feb 2014	Dec 2023	Solar
Shirley Water	Altus Power America Management, LLC	Shirley, MA	3 GWh	Jul 2016	Dec 2023	Solar
Westtown CSG	Altus Power America Management, LLC	Westtown, NY	3 GWh	Apr 2019	Dec 2023	Solar
Carver CSG	Altus Power America Management, LLC	Carver, MA	2 GWh	Apr 2019	Dec 2023	Solar
Belchertown	Altus Power America Management, LLC	Belchertown, MA	1 GWh	Nov 2015	Dec 2023	Solar
Hopkinton CSG	Altus Power America Management, LLC	Hopkinton, MA	3 GWh	Mar 2019	Dec 2023	Solar
West Davisville Solar	Altus Power America Management, LLC	North Kingstown, RI	3 GWh	Nov 2013	Dec 2023	Solar
DDR Shoppers World	Altus Power America Management, LLC	Framingham, MA	1 GWh	Oct 2017	Dec 2023	Solar
Meadow Solar	Altus Power America Management, LLC	Boston, MA	4 GWh	Nov 2016	Dec 2023	Solar
Cedarville CSG	Altus Power America Management, LLC	Plymouth, MA	4 GWh	Jun 2017	Dec 2023	Solar
126 Grove Solar LLC	Altus Power America Management, LLC	Franklin, MA	2 GWh	May 2012	Dec 2023	Solar
East Bridgewater Solar	Altus Power America Management, LLC	East Bridgewater, MA	3 GWh	Oct 2017	Dec 2023	Solar
Big George PV CSG	Altus Power America Management, LLC	Plymouth, MA	1 GWh	Aug 2018	Dec 2023	Solar
Randolph	Altus Power America Management, LLC	Randolph, MA	6 GWh	Oct 2017	Dec 2023	Solar
Axio Green LLC	Altus Power America Management, LLC	Greenfield Township, MA	2 GWh	May 2012	Dec 2023	Solar
Devens	Altus Power America Management, LLC	Shirley, MA	4 GWh	May 2014	Dec 2023	Solar
Monson Solar	Altus Power America Management, LLC	Monson, MA	4 GWh	Jun 2014	Dec 2023	Solar
Sullivan Solar	Altus Power America Management, LLC	New Bedford, MA	2 GWh	Jul 2014	Dec 2023	Solar
Winchendon Solar	Altus Power America Management, LLC	Winchendon, MA	2 GWh	Mar 2014	Dec 2023	Solar
Charlotte Solar LLC VT	Altus Power America Management, LLC	Charlotte, VT	3 GWh	Jun 2014	Dec 2023	Solar
Chester Power Partners	Altus Power America Management, LLC	North Chester, VT	2 GWh	Oct 2014	Dec 2023	Solar
Adams Farm Solar	Altus Power America Management, LLC	Athol, MA	4 GWh	Sep 2013	Dec 2023	Solar
Hunt Farm Solar	Altus Power America Management, LLC	Orange, MA	4 GWh	Aug 2013	Dec 2023	Solar
205 Sturbridge A	Altus Power America Management, LLC	Brimfield, MA	5 GWh	May 2014	Dec 2023	Solar
201 Sturbridge B	Altus Power America Management, LLC	Brimfield, MA	3 GWh	May 2014	Dec 2023	Solar
Ayers Village Solar	Altus Power America Management, LLC	Methuen, MA	3 GWh	May 2014	Dec 2023	Solar
BWC Wading River One, Two, Three CSG	Ameresco BWC Wading River LLC	Mendon, MA	5 GWh	Oct 2017	Dec 2023	Solar
Ameresco Chicopee Energy	AMERESCO Chicopee Energy LLC	Chicopee, MA	14 GWh	Jan 2004	Dec 2023	Landfill Gas
Northampton Landfill Solar PV	Ameresco Glendale Road Solar PV LLC	Northampton, MA	4 GWh	Oct 2017	Dec 2023	Solar
Bradley Energy Center	Ameresco Select Inc	Windsor Locks, CT	13 GWh	Oct 2002	Dec 2023	Natural Gas
Braintree Landfill Solar	Ameresco, Inc - Braintree	Braintree, MA	1 GWh	Nov 2014	Dec 2023	Solar
GELD Solar Farm	Ameresco, Inc - GELD	Groton, MA	3 GWh	May 2016	Dec 2023	Solar
Weston Landfill Solar	Ameresco, Inc - Weston	Weston, MA	3 GWh	Feb 2016	Dec 2023	Solar
Amherst College Co Gen	Amherst College	Amherst, MA	5 GWh	Oct 2006	Dec 2023	Natural Gas : 99.3% Distillate Fuel Oil : 0.7%
Dudley	AMP MA Dudley	Dudley, MA	5 GWh	Jun 2018	Dec 2023	Solar
Joe Jenny	AMP MA Joe Jenny	Oxford, MA	2 GWh	Apr 2018	Dec 2023	Solar
Gilman Mill	Ampersand Gilman Hydro LP	Gilman, VT	28 GWh	Dec 1940	Dec 2023	Water
ANP Blackstone Energy Project	ANP Blackstone Energy Company LLC	Blackstone, MA	2 TWh	May 2001	Mar 2025	Natural Gas
Antrim Wind	Antrim Wind Energy LLC	Antrim, NH	75 GWh	Nov 2019	Mar 2025	Wind
Arctaris Saddleback Solar	Arctaris Saddleback Solar, LLC	Dallas Plantation, ME	201 MWh	Oct 2023	Dec 2023	Solar
ASD Cotuit MA Solar LLC	ASD Cotuit MA Solar LLC	Sandwich, MA	110 MWh	Oct 2023	Dec 2023	Solar
ASD Wallum MA Solar LLC(CSG)	ASD Wallum MA Solar LLC	Douglas, MA	7 GWh	Dec 2021	Dec 2023	Solar
Ashby Solar, LLC CSG	Ashby Solar, LLC	Fitchburg, MA	3 GWh	Jun 2018	Dec 2023	Solar
Athens Energy	Athens Energy, LLC	Athens, ME	60 GWh	Sep 2016	Dec 2023	Wood/Wood Waste Solids
New England Wind LLC	Avangrid Renewables LLC	Florida, MA	70 GWh	Nov 2012	Mar 2025	Wind
Lempster Wind LLC	Avangrid Renewables LLC	Lempster, NH	65 GWh	Nov 2008	Mar 2025	Wind
Deerfield Wind LLC	Avangrid Renewables LLC	Searsburg, VT	91 GWh	Nov 2017	Mar 2025	Wind
Groton Wind LLC	Avangrid Renewables LLC	Groton, NH	110 GWh	Nov 2012	Mar 2025	Wind
Barton Solar Farm	Barton Solar, LLC	Barton, VT	2 GWh	Oct 2014	Dec 2023	Solar
West Charleston	Barton Village, Inc	West Charleston, VT	6 GWh	Jun 1931	Dec 2023	Water
Bashaw Solar CSG 1, LLC	Bashaw Solar 1, LLC	Newbury, MA	7 GWh	Mar 2017	Dec 2023	Solar
Milo PV - BD Solar 1 LLC	BD Solar 1 LLC	Milo, ME	25 GWh	May 2021	Dec 2023	Solar
Winslow PV - BD Solar 2 LLC	BD Solar 2 LLC	Winslow, ME	11 GWh	Jun 2022	Dec 2023	Solar
Augusta PV - BD Solar Augusta LLC	BD Solar Augusta LLC	Augusta, ME	7 GWh	May 2021	Dec 2023	Solar
Fairfield PV - BD Solar Fairfield LLC	BD Solar Fairfield LLC	Fairfield, ME	8 GWh	May 2021	Dec 2023	Solar
BD Solar Ellsworth LLC	BD Solar Hancock North LLC	Augusta, ME	2 GWh	May 2022	Dec 2023	Solar
Oxford PV - BD Solar Oxford LLC	BD Solar Oxford LLC	Oxford, ME	11 GWh	May 2021	Dec 2023	Solar
Palmyra PV - BD Solar Palmyra LLC	BD Solar Palmyra LLC	Palmyra, ME	8 GWh	May 2022	Dec 2023	Solar
Beacon Solar, LLC	Beacon Solar, LLC	Easthampton, MA	4 GWh	Oct 2022	Dec 2023	Solar
Fife Brook	Bear Swamp Power Company LLC	Florida, MA	33 GWh	Sep 1974	Dec 2023	Water
Belchertown Renewables Community Solar	Belchertown Renewables, LLC	Belchertown, MA	6 GWh	Feb 2018	Dec 2023	Solar
ANP Bellingham Energy Project	Bellingham Power Generation LLC	Bellingham, MA	3 TWh	Oct 2002	Mar 2025	Natural Gas
Berkshire Power	Berkshire Power Co LLC	Agawam, MA	70 GWh	Aug 1999	Dec 2023	Natural Gas
Burgess BioPower	Berlin Station, LLC	Berlin, NH	496 GWh	Oct 2013	Dec 2023	Wood/Wood Waste Solids : 98.3% Distillate Fuel Oil : 1.7%
Bird Machine Solar Farm	Bird Machine Solar Farm, LLC	South Walpole, MA	6 GWh	Jul 2017	Dec 2023	Solar
Blacksmith Road Solar 1	Blacksmith Road Solar 1, LLC	Falmouth, MA	8 GWh	Nov 2021	Dec 2023	Solar
Blackstone/Tupperware	Blackstone Hydro Inc.	North Smithfield, RI	3 GWh	Dec 1980	Mar 2025	Water
Sunpin Blandford	Blandford Sun, LLC	Southwick, MA	6 GWh	May 2020	Nov 2023	Solar
Blodgett Solar CSG	Blodgett Street Solar 1, LLC	Tyngsboro, MA	9 GWh	Jul 2021	Dec 2023	Solar
Equinix - Billerica	Bloom Energy	Billerica, MA	17 GWh	Aug 2021	Dec 2023	Natural Gas
Digital Fairfield	Bloom Energy	Trumbull, CT	13 GWh	May 2018	Dec 2023	Natural Gas
Medtronic - New Haven 2	Bloom Energy	North Haven, CT	17 GWh	Sep 2020	Dec 2023	Natural Gas
Medtronic - New Haven	Bloom Energy	North Haven, CT	14 GWh	Sep 2020	Dec 2023	Natural Gas
One Patriot	Bloom Energy	Foxborough, MA	13 GWh	Nov 2019	Dec 2023	Natural Gas
Yale New Haven - New London	Bloom Energy	New London, CT	15 GWh	Aug 2022	Dec 2023	Natural Gas
CoreSite - Somerville	Bloom Energy	Somerville, MA	30 GWh	Aug 2020	Dec 2023	Natural Gas
Connecticut College	Bloom Energy	New London, CT	8 GWh	Aug 2019	Dec 2023	Natural Gas
Boltonville Hydro Associates	Boltonville Hydro Associates	Boltonville, VT	3 GWh	Jun 1984	Dec 2023	Water
Boston Medical Center CHP Plant	Boston Medical Center	Boston, MA	12 GWh	Mar 2017	Dec 2023	Natural Gas
Brassua Hydroelectric Project	Brassua Hydroelectric LP	Rockwood, ME	20 GWh	Aug 1989	Dec 2023	Water
Breckenridge Solar	Breckenridge Street Solar 1, LLC	Palmer, MA	7 GWh	Oct 2020	Dec 2023	Solar
Penacook Upper Falls Hydro	Briar-Hydro Associates	Penacook, NH	17 GWh	Nov 1986	Dec 2023	Water
Rolfe Canal Hydro	Briar-Hydro Associates	Penacook, NH	28 GWh	Nov 1987	Dec 2023	Water
Penacook Lower Falls	Briar-Hydro Associates	Boscawen, NH	23 GWh	Jul 1983	Dec 2023	Water
Bridgeport Energy Project	Bridgeport Energy LLC	Bridgeport, CT	3 TWh	May 1998	Mar 2025	Natural Gas
Bridgeport Fuel Cell, LLC	Bridgeport Fuel Cell, LLC	Bridgeport, CT	105 GWh	Nov 2013	Dec 2023	Natural Gas
Bridgewater Power LP	Bridgewater Power Co LP	Bridgewater, NH	109 GWh	Jul 1987	Dec 2023	Wood/Wood Waste Solids : 99.8%
Brockelman Road Solar 2	Brockelman Road Solar 2, LLC	Lancaster, MA	2 GWh	Jul 2021	Dec 2023	Solar
Brook Street Solar 1 CSG	Brook Street Solar 1, LLC	Plympton, MA	5 GWh	Jul 2017	Dec 2023	Solar
Ellsworth Hydro Station	Brookfield Black Bear Hydro, LLC	Ellsworth, ME	35 GWh	Jun 1924	Dec 2023	Water
Stillwater B	Brookfield Black Bear Hydro, LLC	Old Town, ME	13 GWh	Aug 2013	Dec 2023	Water
Orono B	Brookfield Black Bear Hydro, LLC	Orono, ME	26 GWh	Oct 2013	Dec 2023	Water
Milford Hydro Station	Brookfield Black Bear Hydro, LLC	Milford, ME	53 GWh	Jun 1941	Dec 2023	Water
West Enfield Hydro	Brookfield Black Bear Hydro, LLC	West Enfield, ME	100 GWh	Mar 1988	Dec 2023	Water
Orono Hydro Station	Brookfield Black Bear Hydro, LLC	Orono, ME	12 GWh	Dec 2008	Dec 2023	Water
Stillwater Hydro Station	Brookfield Black Bear Hydro, LLC	Stillwater, ME	12 GWh	Dec 1912	Dec 2023	Water
Medway Hydro	Brookfield Black Bear Hydro, LLC	Medway, ME	28 GWh	Dec 1922	Dec 2023	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	734.7 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.1 TWh	85
#13	Duke Energy Carolinas	111.4 TWh	556
#17	Duke Energy Progress East	65.0 TWh	554
#52	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.8 TWh	20
#12	New York Independent System Operator	130.6 TWh	1,100
#1	PJM Interconnection, LLC	858.1 TWh	2,305
#29	South Carolina Public Service Authority	19.2 TWh	33
#60	Southeastern Power Administration	1.4 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	190.4 TWh	1,943
#8	Tennessee Valley Authority	158.8 TWh	170
#10	Florida Power & Light Co.	148.6 TWh	159
#12	New York Independent System Operator	130.6 TWh	1,100
#13	Duke Energy Carolinas	111.4 TWh	556
#15	ISO New England	103.1 TWh	1,487
#16	Bonneville Power Administration	82.1 TWh	158
#17	Duke Energy Progress East	65.0 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.7 TWh	45
#19	PacifiCorp East	57.3 TWh	204