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
Marston Mills Solar	SoCore Energy LLC	Marstons Mills, MA	6 GWh	Nov 2021	Dec 2025	Solar
Lewiston Junction Road Solar	NextGrid Peppertree, LLC	Poland, ME	7 GWh	Dec 2021	Dec 2025	Solar
Platt Hill	LSE Pictor LLC	Winchester, CT	3 GWh	Dec 2021	Dec 2025	Solar
Monument Valley	LSE Lepus LLC	Great Barrington, MA	3 GWh	Dec 2021	Dec 2024	Solar
ASD Wallum MA Solar LLC(CSG)	ASD Wallum MA Solar LLC	Douglas, MA	9 GWh	Dec 2021	Dec 2024	Solar
Syncarpha Tewksbury Hybrid CSG	Syncarpha Tewksbury, LLC	Tewksbury, MA	4 GWh	Jan 2022	Dec 2025	Solar
Redman North Community Solar	AES Distributed Energy	Brockport, NY	106 MWh	Jan 2022	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
Southington Solar One	DG Connecticut III, LLC	Southington, CT	9 GWh	Jan 2022	Dec 2025	Solar
Burlington Solar 1	DG Connecticut III, LLC	Burlington, CT	6 GWh	Jan 2022	Dec 2025	Solar
Milo CSG	Milo CSG, LLC	Milo, ME	7 GWh	Jan 2022	Dec 2025	Solar
Augusta Road Bowdoin Solar, LLC	REA Investments, LLC	Bowdoin, ME	5 GWh	Jan 2022	Dec 2025	Solar
Church Hill Road Augusta Solar, LLC	REA Investments, LLC	Augusta, ME	7 GWh	Jan 2022	Dec 2025	Solar
Baldwin (ME)	Maine DG Solar Baldwin, LLC	West Baldwin, ME	10 GWh	Feb 2022	Dec 2025	Solar
Augusta	Maine DG Solar Augusta, LLC	Augusta, ME	5 GWh	Feb 2022	Dec 2025	Solar
Monmouth	Maine DG Solar Monmouth, LLC	Monmouth, ME	9 GWh	Feb 2022	Dec 2025	Solar
Merrill Road Solar	NextGrid Mangrove, LLC	Lewiston, ME	6 GWh	Feb 2022	Dec 2025	Solar
CVEC Round 4 Brewster Captn Golf Course	Freemans Way Solar Project 2019, LLC	Brewster, MA	1 GWh	Feb 2022	Dec 2025	Solar
River Road	Norridgewock River Road Solar, LLC	Norridgewock, ME	8 GWh	Feb 2022	Dec 2025	Solar
TPE King Solar Holdings1, LLC (CSG)	Nautilus Solar Solutions	North Smithfield, RI	18 GWh	Mar 2022	Dec 2025	Solar
Lisbon Street Solar	NextGrid Cliffrose, LLC	Lewiston, ME	3 GWh	Mar 2022	Dec 2025	Solar
Bunce	LSE Indus LLC	North Canaan, CT	3 GWh	Mar 2022	Dec 2025	Solar
Livermore Falls CSG	Livermore Falls CSG, LLC	Livermore Falls, ME	4 GWh	Apr 2022	Dec 2025	Solar
Mariaville Road Elsworth Solar, LLC	REA Investments, LLC	Ellsworth, ME	1 GWh	Apr 2022	Dec 2025	Solar
Auburn Solar Project	Agilitas Energy, Inc.	Auburn, MA	8 GWh	Apr 2022	Dec 2025	Solar
ER Center Road Solar, LLC	Altus Power America Management, LLC	Hardwick, VT	3 GWh	Apr 2022	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
BD Solar Ellsworth LLC	BD Solar Hancock North LLC	Augusta, ME	9 GWh	May 2022	Dec 2025	Solar
Athens AT01	Nautilus Solar Solutions	Athens, ME	7 GWh	May 2022	Dec 2025	Solar
Washington WS01	Nautilus Solar Solutions	Washington, ME	5 GWh	May 2022	Dec 2025	Solar
Farmingdale FA01	Nautilus Solar Solutions	Farmingdale, ME	8 GWh	May 2022	Dec 2025	Solar
Ryans Ranch	Nautilus Solar Solutions	Paris, ME	5 GWh	May 2022	Dec 2025	Solar
Sanford CGA	Nautilus Solar Solutions	Sanford, ME	8 GWh	May 2022	Dec 2025	Solar
Faunce Corner Community Solar	Faunce Corner Road Dartmouth Solar 1, LLC	Dartmouth, MA	2 GWh	Jun 2022	Dec 2024	Solar
MA Blackstone	Catalyze Blackstone 83 Federal Street Microgrid, LLC	Blackstone, MA	7 GWh	Jun 2022	Dec 2025	Solar
Wells (ME)	Nautilus Solar Solutions	Wells, ME	8 GWh	Jun 2022	Dec 2025	Solar
Shaker	Nautilus Solar Solutions	Gray, ME	6 GWh	Jun 2022	Dec 2025	Solar
Market Street Gardiner Solar, LLC	REA Investments, LLC	Gardiner, ME	6 GWh	Jun 2022	Dec 2025	Solar
Winslow PV - BD Solar 2 LLC	BD Solar 2 LLC	Winslow, ME	10 GWh	Jun 2022	Dec 2025	Solar
Main Rd Community Solar	AES Distributed Energy	Newstead, NY	8 GWh	Jun 2022	Dec 2025	Solar
Brookwood Drive Community Solar	AES Distributed Energy	Westport, MA	5 GWh	Jul 2022	Dec 2025	Solar
Dynamic Madison (CSG)	MN8 Energy LLC	Madison, ME	10 GWh	Jul 2022	Dec 2025	Solar
Harmony Solar (ME)	Maine DG Solar Harmony, LLC	Harmony, ME	9 GWh	Jul 2022	Dec 2025	Solar
Town of Amherst Solar	Agilitas Energy, Inc.	Amherst, MA	4 GWh	Jul 2022	Dec 2025	Solar
Webb Road Solar	NextGrid Mastic, LLC	Waterville, ME	5 GWh	Aug 2022	Dec 2025	Solar
Yale New Haven - New London	Bloom Energy	New London, CT	14 GWh	Aug 2022	Dec 2025	Natural Gas
North Kingstown Solar LLC	North Kingstown Solar LLC	North Kingstown, RI	3 GWh	Aug 2022	Dec 2024	Solar
Oakland	Nautilus Solar Solutions	Oakland, ME	9 GWh	Aug 2022	Dec 2025	Solar
700 Binnewater	Madison Energy Investments LLC	Rosendale, NY	2 GWh	Aug 2022	Dec 2025	Solar
Old Frontier Solar III	Old Frontier Solar III PV, LLC	South Deerfield, MA	4 GWh	Aug 2022	Dec 2025	Solar
Partridge Solar	SoCore Energy LLC	Lanesborough, MA	8 GWh	Aug 2022	Dec 2025	Solar
Saddleback Solar	SoCore Energy LLC	Lanesborough, MA	4 GWh	Aug 2022	Dec 2024	Solar
Skyline Solar	SoCore Energy LLC	Lanesborough, MA	8 GWh	Aug 2022	Dec 2025	Solar
Adams Grove Solar	SoCore Energy LLC	Adams, MA	6 GWh	Aug 2022	Dec 2024	Solar
0 Middle	Madison Energy Investments LLC	Chatham, MA	3 GWh	Aug 2022	Dec 2025	Solar
West Haydenville PJ Community Solar	AES Distributed Energy	Williamsburg, MA	9 GWh	Aug 2022	Dec 2025	Solar : 99.8%
ER Bone Hill Solar, LLC	Altus Power America Management, LLC	Northfield, VT	2 GWh	Aug 2022	Dec 2025	Solar
UMass PV Lot 22	RWE Clean Energy	Amherst, MA	3 GWh	Aug 2022	Dec 2025	Solar
North Stonington Solar Center, LLC	Adapture Renewables, Inc.	North Stonington, CT	32 GWh	Sep 2022	Dec 2025	Solar
Syncarpha Millbury Hybrid (CSG)	Syncarpha Millbury, LLC	Millbury, MA	8 GWh	Sep 2022	Dec 2025	Solar
Dynamic Corinth (CSG)	MN8 Energy LLC	Corinth, ME	10 GWh	Sep 2022	Dec 2025	Solar
Silver Maple	WEB Silver Maple Wind LLC	Clifton, ME	64 GWh	Sep 2022	Dec 2025	Wind
McAllister Landfill	Solar Breakers LLC	Portsmouth, RI	2 GWh	Sep 2022	Dec 2025	Solar
Tank Farm 4	Solar Breakers LLC	Portsmouth, RI	13 GWh	Sep 2022	Dec 2025	Solar
ER Sand Hill	Altus Power America Management, LLC	Castleton, VT	3 GWh	Oct 2022	Dec 2025	Solar
Norton Powerhouse 2	Norton Powerhouse 2	Worcester, MA	29 GWh	Oct 2022	Dec 2025	Natural Gas
Beacon Solar, LLC	Agilitas Energy, Inc.	Easthampton, MA	8 GWh	Oct 2022	Dec 2025	Solar
Niagara Bottling - Bloomfield	Westbound Solar 3, LLC	Bloomfield, CT	4 GWh	Oct 2022	Dec 2025	Solar
SCS Harpswell 012903 Brunswick, LLC	Arevon Energy, Inc.	Brunswick, ME	7 GWh	Oct 2022	Dec 2025	Solar
French King Solar LLC	French King Solar LLC	Erving, MA	8 GWh	Oct 2022	Dec 2025	Solar
North Bridgton	Nautilus Solar Solutions	Oakland, ME	8 GWh	Oct 2022	Dec 2025	Solar
Syncarpha Westminster Hybrid CSG	Syncarpha Westminster, LLC	Westminster, MA	6 GWh	Oct 2022	Dec 2025	Solar
Subase Microgrid Project	Connecticut Mun Elec Engy Coop	Groton, CT	30 GWh	Nov 2022	Dec 2025	Natural Gas
Naval Sub Base New London Fuel Cell	Groton Station Fuel Cell, LLC	Groton, CT	44 GWh	Nov 2022	Dec 2024	Natural Gas
Kearsarge West Shore Solar LLC	Kearsarge West Shore Solar LLC	Portsmouth, RI	9 GWh	Nov 2022	Dec 2025	Solar
Water Street Solar	AES Distributed Energy	Randolph, ME	7 GWh	Nov 2022	Dec 2025	Solar
Huxley Solar	Agilitas Energy, Inc.	Ludlow, MA	10 GWh	Nov 2022	Dec 2025	Solar
Emerald Marshfields, LLC	Emerald Marshfield, LLC	Marshfield, MA	2 GWh	Nov 2022	Dec 2025	Solar
White Rock Road LLC	White Rock Road LLC	Westerly, RI	11 GWh	Nov 2022	Dec 2025	Solar
Barefoot Solar	Madison Energy Investments LLC	Fairfield, ME	6 GWh	Nov 2022	Dec 2025	Solar
GD West Greenwich Nooseneck I, LLC	GD West Greenwich Nooseneck I, LLC	West Greenwich, RI	31 GWh	Nov 2022	Dec 2025	Solar
Town House	Nautilus Solar Solutions	Chelsea, ME	8 GWh	Nov 2022	Dec 2025	Solar
Freetown MA 1, LLC	Navisun LLC	Freetown, MA	2 GWh	Nov 2022	Dec 2025	Solar
Mainely Solar (Wyman Hill Solar LLC)	Wyman Hill Solar, LLC	Rumford, ME	6 GWh	Nov 2022	Dec 2025	Solar
Quarry	Nautilus Solar Solutions	North Berwick, ME	10 GWh	Nov 2022	Dec 2025	Solar
665 Scenic Highway	Madison Energy Investments LLC	Bourne, MA	89 MWh	Nov 2022	Dec 2025	Solar
Plympton Lake Street Solar	REA Investments, LLC	Plympton, MA	2 GWh	Nov 2022	Dec 2025	Solar
Route 3 China Solar, LLC	REA Investments, LLC	China, ME	8 GWh	Nov 2022	Dec 2025	Solar
15 Lincoln	Madison Energy Investments LLC	Norfolk, MA	1 GWh	Nov 2022	Dec 2025	Solar
Old Middleboro Road Solar	Agilitas Energy, Inc.	Rochester, MA	8 GWh	Dec 2022	Dec 2025	Solar
MA CS Uxbridge Community Solar	MA CS Uxbridge, LLC	Uxbridge, MA	7 GWh	Jan 2023	Dec 2025	Solar
GSPP NESV, LLC	Green Street Power Partners	Attleboro, MA	2 GWh	Feb 2023	Dec 2025	Solar
Overlook	Westbound Solar 3, LLC	Westminster, MA	7 GWh	Feb 2023	Dec 2025	Solar
Broadhead	Madison Energy Investments LLC	Waterville, ME	7 GWh	Feb 2023	Dec 2025	Solar
Norton	Madison Energy Holdings LLC	Norton, MA	2 GWh	Feb 2023	Dec 2025	Solar
Kearsarge Upper Union	Kearsarge Upper Union LLC	Franklin, MA	2 GWh	Feb 2023	Dec 2025	Solar
Kearsarge Smithfield LLC	Kearsarge Smithfield LLC	Burrillville, RI	14 GWh	Mar 2023	Dec 2025	Solar
Kearsarge 100 Sohier Rd	Kearsarge Beverly LLC	Beverly, MA	3 GWh	Apr 2023	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