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
ASD Cotuit MA Solar LLC	ASD Cotuit MA Solar LLC	Sandwich, MA	2 GWh	Oct 2023	Dec 2024	Solar
SCS Harpswell 012903 Brunswick, LLC	Arevon Energy, Inc.	Brunswick, ME	7 GWh	Oct 2022	Dec 2025	Solar
Arctaris Saddleback Solar	Arctaris Saddleback Solar, LLC	Dallas Plantation, ME	7 GWh	Oct 2023	Dec 2025	Solar
Antrim Wind	Antrim Wind Energy LLC	Antrim, NH	76 GWh	Nov 2019	May 2026	Wind
ANP Blackstone Energy Project	ANP Blackstone Energy Company LLC	Blackstone, MA	3 TWh	May 2001	May 2026	Natural Gas
Orbit Energy RI	Anaergia	Johnston, RI	144 MWh	Jun 2017	Dec 2024	Other Biomass Gas
Gilman Mill	Ampersand Gilman Hydro LP	Gilman, VT	2 GWh	Dec 1940	Dec 2025	Water
Joe Jenny	AMP MA Joe Jenny	Oxford, MA	2 GWh	Apr 2018	Dec 2024	Solar
Dudley	AMP MA Dudley	Dudley, MA	8 GWh	Jun 2018	Dec 2025	Solar
Amherst College Co Gen	Amherst College	Amherst, MA	8 GWh	Oct 2006	Dec 2025	Natural Gas
Weston Landfill Solar	Ameresco, Inc - Weston	Weston, MA	3 GWh	Feb 2016	Dec 2025	Solar
GELD Solar Farm	Ameresco, Inc - GELD	Groton, MA	3 GWh	May 2016	Dec 2025	Solar
Braintree Landfill Solar	Ameresco, Inc - Braintree	Braintree, MA	1 GWh	Nov 2014	Dec 2025	Solar
Bradley Energy Center	Ameresco Select Inc	Windsor Locks, CT	11 GWh	Oct 2002	Dec 2025	Natural Gas
Northampton Landfill Solar PV	Ameresco Glendale Road Solar PV LLC	Northampton, MA	2 GWh	Oct 2017	Dec 2025	Solar
Ameresco Chicopee Energy	AMERESCO Chicopee Energy LLC	Chicopee, MA	4 GWh	Jan 2004	Dec 2025	Landfill Gas
BWC Wading River One, Two, Three CSG	Ameresco BWC Wading River LLC	Mendon, MA	2 GWh	Oct 2017	Dec 2025	Solar
Rail Trail	Altus Power America Management, LLC	Great Barrington, MA	3 GWh	Apr 2016	Dec 2025	Solar
Hunt Farm Solar	Altus Power America Management, LLC	Orange, MA	3 GWh	Aug 2013	Dec 2025	Solar
205 Sturbridge A	Altus Power America Management, LLC	Brimfield, MA	4 GWh	May 2014	Dec 2025	Solar
Hopkinton CSG	Altus Power America Management, LLC	Hopkinton, MA	3 GWh	Mar 2019	Dec 2025	Solar
126 Grove Solar LLC	Altus Power America Management, LLC	Franklin, MA	2 GWh	May 2012	Dec 2025	Solar
201 Sturbridge B	Altus Power America Management, LLC	Brimfield, MA	2 GWh	May 2014	Dec 2025	Solar
Cedarville CSG	Altus Power America Management, LLC	Plymouth, MA	914 MWh	Jun 2017	Dec 2025	Solar
Meadow Solar	Altus Power America Management, LLC	Boston, MA	4 GWh	Nov 2016	Dec 2025	Solar
DDR Shoppers World	Altus Power America Management, LLC	Framingham, MA	2 GWh	Oct 2017	Dec 2025	Solar
Carver CSG	Altus Power America Management, LLC	Carver, MA	3 GWh	Apr 2019	Dec 2025	Solar
Rising Paper	Altus Power America Management, LLC	Great Barrington, MA	3 GWh	Apr 2016	Dec 2025	Solar
Hampden	Altus Power America Management, LLC	Hampden, MA	5 GWh	Jun 2015	Dec 2025	Solar
Green Meadows	Altus Power America Management, LLC	Sandwich, MA	5 GWh	Apr 2014	Dec 2025	Solar
Little Bay	Altus Power America Management, LLC	Providence, RI	1 GWh	Feb 2014	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
Big George PV CSG	Altus Power America Management, LLC	Plymouth, MA	1 GWh	Aug 2018	Dec 2025	Solar
Belchertown	Altus Power America Management, LLC	Belchertown, MA	1 GWh	Nov 2015	Dec 2025	Solar
Monson Solar	Altus Power America Management, LLC	Monson, MA	4 GWh	Jun 2014	Dec 2025	Solar
Forbes Street Solar	Altus Power America Management, LLC	East Providence, RI	4 GWh	Nov 2013	Dec 2025	Solar
Axio Green LLC	Altus Power America Management, LLC	Greenfield Township, MA	2 GWh	May 2012	Dec 2025	Solar
West Davisville Solar	Altus Power America Management, LLC	North Kingstown, RI	3 GWh	Nov 2013	Dec 2025	Solar
Devens	Altus Power America Management, LLC	Shirley, MA	5 GWh	May 2014	Dec 2025	Solar
East Bridgewater Solar	Altus Power America Management, LLC	East Bridgewater, MA	3 GWh	Oct 2017	Dec 2025	Solar
Ayers Village Solar	Altus Power America Management, LLC	Methuen, MA	3 GWh	May 2014	Dec 2025	Solar
Adams Farm Solar	Altus Power America Management, LLC	Athol, MA	4 GWh	Sep 2013	Dec 2025	Solar
Sullivan Solar	Altus Power America Management, LLC	New Bedford, MA	2 GWh	Jul 2014	Dec 2025	Solar
Winchendon Solar	Altus Power America Management, LLC	Winchendon, MA	3 GWh	Mar 2014	Dec 2025	Solar
Randolph	Altus Power America Management, LLC	Randolph, MA	6 GWh	Oct 2017	Dec 2025	Solar
Solten Plainville 6000, LLC	Altus Power America Management, LLC	Plainville, MA	7 GWh	Jul 2017	Dec 2025	Solar
Charlotte Solar LLC VT	Altus Power America Management, LLC	Charlotte, VT	3 GWh	Jun 2014	Dec 2025	Solar
Westtown CSG	Altus Power America Management, LLC	Westtown, NY	3 GWh	Apr 2019	Dec 2025	Solar
Chester Power Partners	Altus Power America Management, LLC	North Chester, VT	2 GWh	Oct 2014	Dec 2025	Solar
Billings Road	Altus Power America Management, LLC	Hardwick, VT	2 GWh	Oct 2021	Dec 2025	Solar
Dynamic - Glenburn Broadway One (CSG)	Altus Power America Management, LLC	Glenburn, ME	6 GWh	Oct 2024	Dec 2025	Solar
Dynamic - Enfield Hammett Road CSG	Altus Power America Management, LLC	Enfield, ME	9 GWh	Aug 2024	Dec 2025	Solar
ER Bone Hill Solar, LLC	Altus Power America Management, LLC	Northfield, VT	2 GWh	Aug 2022	Dec 2025	Solar
ER Center Road Solar, LLC	Altus Power America Management, LLC	Hardwick, VT	3 GWh	Apr 2022	Dec 2025	Solar
Fredonia Solar LLC	Altus Power America Management, LLC	Fredonia, NY	1 GWh	Aug 2021	Dec 2025	Solar
Dynamic - Exeter Solar CSG	Altus Power America Management, LLC	Exeter, ME	6 GWh	Aug 2024	Dec 2025	Solar
Dynamic - Gray Solar	Altus Power America Management, LLC	Gray, ME	5 GWh	Nov 2024	Dec 2025	Solar
ER Sand Hill	Altus Power America Management, LLC	Castleton, VT	3 GWh	Oct 2022	Dec 2025	Solar
Dynamic - Wales Leeds Junction Road (CSG)	Altus Power America Management, LLC	Wales, ME	7 GWh	Oct 2024	Dec 2025	Solar
Brattleboro (Windham Landfill)	Altus Power America Management, LLC	Brattleboro, VT	6 GWh	Jul 2018	Dec 2025	Solar
Loring	Altus Power America Management, LLC	Limestone, ME	8 GWh	Apr 2023	Dec 2025	Solar
Caribou	Altus Power America Management, LLC	Caribou, ME	6 GWh	Jul 2023	Dec 2025	Solar
ER Salvage Yard	Altus Power America Management, LLC	Morrisville, VT	3 GWh	Oct 2021	Dec 2025	Solar
MA Military Reservation Wind Project	Air Force Civil Engineer Center	Otis ANG Base Bourne, MA	5 GWh	Nov 2009	Dec 2025	Wind
Algonquin Windsor Locks	Ahlstrom Power Windsor Locks LLC	Windsor Locks, CT	147 GWh	Dec 1989	May 2026	Natural Gas : 92.2% Distillate Fuel Oil : 7.8%
Auburn Solar Project	Agilitas Energy, Inc.	Auburn, MA	8 GWh	Apr 2022	Dec 2025	Solar
Old Middleboro Road Solar	Agilitas Energy, Inc.	Rochester, MA	8 GWh	Dec 2022	Dec 2025	Solar
Charlemont A	Agilitas Energy, Inc.	Charlemont, MA	3 GWh	Aug 2021	Dec 2025	Solar
Fairhaven E	Agilitas Energy, Inc.	Fairhaven, MA	3 GWh	Jul 2021	Dec 2025	Solar
Huxley Solar	Agilitas Energy, Inc.	Ludlow, MA	10 GWh	Nov 2022	Dec 2025	Solar
Beacon Solar, LLC	Agilitas Energy, Inc.	Easthampton, MA	8 GWh	Oct 2022	Dec 2025	Solar
Town of Amherst Solar	Agilitas Energy, Inc.	Amherst, MA	4 GWh	Jul 2022	Dec 2025	Solar
ZPD-PT Solar Project 2017-021 LLC Hybrid	AES Distributed Energy	Wilbraham, MA	2 GWh	Dec 2020	Dec 2025	Solar
ZPD-PT Solar Project 2017-006 LLC Hybrid	AES Distributed Energy	Warren, MA	6 GWh	Jun 2021	Dec 2025	Solar
Dunstable Solar 1, LLC	AES Distributed Energy	Dunstable, MA	8 GWh	Mar 2021	Dec 2025	Solar
Dusenberry	AES Distributed Energy	Troy, NY	7 GWh	Nov 2021	Dec 2025	Solar
Knapp East (CSG)	AES Distributed Energy	Akron, NY	7 GWh	Nov 2021	Dec 2025	Solar
BWC Stony Brook, LLC Hybrid	AES Distributed Energy	Chelmsford, MA	2 GWh	Jun 2021	Dec 2025	Solar
Main Rd Community Solar	AES Distributed Energy	Newstead, NY	8 GWh	Jun 2022	Dec 2025	Solar
Redman North Community Solar	AES Distributed Energy	Brockport, NY	106 MWh	Jan 2022	Dec 2025	Solar
Glenmere Lake	AES Distributed Energy	Goshen, NY	3 GWh	May 2021	Dec 2025	Solar
Knapp West(CSG)	AES Distributed Energy	Akron, NY	6 GWh	Nov 2021	Dec 2025	Solar
Rowe (CSG)	AES Distributed Energy	Olean, NY	8 GWh	Oct 2021	Dec 2025	Solar
Redman South Community Solar	AES Distributed Energy	Brockport, NY	8 GWh	Jan 2022	Jun 2025	Solar
Townline Community Solar	AES Distributed Energy	Batavia, NY	7 GWh	Jan 2022	Dec 2025	Solar
Williams Rd	AES Distributed Energy	Ransomville, NY	6 GWh	Aug 2021	Dec 2025	Solar
West Haydenville PJ Community Solar	AES Distributed Energy	Williamsburg, MA	9 GWh	Aug 2022	Dec 2025	Solar : 99.8%
Brookwood Drive Community Solar	AES Distributed Energy	Westport, MA	5 GWh	Jul 2022	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 2017-044 LLC CSG	AES Distributed Energy	Spencer, MA	812 MWh	Sep 2021	Dec 2025	Solar
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%
BWC Muddy Brook, LLC Hybrid	AES Distributed Energy	Mendon, MA	2 GWh	Aug 2021	Dec 2025	Solar : 99.8%
ZPD-PT Solar Project 2017-038 Hybrid LLC	AES Distributed Energy	Lancaster, MA	8 GWh	Mar 2021	Dec 2025	Solar
Amaterasu LLC	AES Distributed Energy	Lancaster, MA	7 GWh	May 2021	Dec 2025	Solar
Blackhorse Farm Solar, LLC CSG	AES Distributed Energy	Warren, RI	6 GWh	Nov 2020	Dec 2025	Solar
Water Street Solar	AES Distributed Energy	Randolph, ME	7 GWh	Nov 2022	Dec 2025	Solar
East Brookfield Main Street Solar LLC CS	AES Distributed Energy	East Brookfield, MA	1 GWh	Nov 2020	Dec 2025	Solar
University Solar, LLC	AES Distributed Energy	West Greenwich, RI	27 GWh	Nov 2019	May 2026	Solar
Randall Solar Project Hybrid	AES Distributed Energy	Berlin, MA	9 GWh	Jun 2021	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