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
MDFA Devens-Saratoga	Terraform Arcadia	Devens, MA	3 GWh	Feb 2016	Dec 2025	Solar
Weston Landfill Solar	Ameresco, Inc - Weston	Weston, MA	3 GWh	Feb 2016	Dec 2025	Solar
UDR Glastonbury Fuel Cell	UIL Distributed Resources, LLC	Glastonbury, CT	16 GWh	Jan 2016	Dec 2025	Natural Gas
Town of Needham VNEM CSG	Tesla Inc.	Needham, MA	4 GWh	Jan 2016	Dec 2025	Solar
Williamsburg Solar LLC VNEM CSG	Tesla Inc.	Haydenville, MA	1 GWh	Jan 2016	Dec 2025	Solar
Jericho Power	Jericho Power LLC	Berlin, NH	23 GWh	Dec 2015	May 2026	Wind
West Brookfield Solar, LLC	CVI CleanCapital Solar 7	West Brookfield, MA	2 GWh	Dec 2015	Dec 2025	Solar
Old Wardour Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2025	Solar
Vuelta Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2025	Solar
Spring Hill Road	AES Distributed Energy	Barre, MA	243 MWh	Nov 2015	May 2026	Solar
Syncarpha Palmer, LLC	Syncarpha Palmer, LLC	Palmer, MA	7 GWh	Nov 2015	Dec 2025	Solar
Federal Road Solar 1, LLC CSG	Federal Road Solar 1, LLC	South Carver, MA	8 GWh	Nov 2015	Dec 2025	Solar
BWC Swan Pond River CSG	BWC Swan Pond River, LLC	Rehoboth, MA	3 GWh	Nov 2015	Dec 2025	Solar
West Groton CHP	Hollingsworth & Vose Co West Groton	Groton, MA	22 GWh	Nov 2015	Dec 2024	Natural Gas
Belchertown	Altus Power America Management, LLC	Belchertown, MA	1 GWh	Nov 2015	Dec 2025	Solar
Nexamp Peak CSG	Nexamp Peak, LLC	Hancock, MA	2 GWh	Nov 2015	Dec 2025	Solar
154 D Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Nov 2015	Dec 2025	Solar
RGS-Rutland VNM SREC II Project (MA)	TerraForm Solar XVII, LLC	Rutland, MA	3 GWh	Oct 2015	Dec 2025	Solar
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	18 GWh	Oct 2015	May 2026	Natural Gas : 84.7% Solar : 15.3%
Brookside	Terraform Arcadia	North Smithfield, RI	969 MWh	Oct 2015	Nov 2025	Solar
Wind Colebrook South	Wind Colebrook South	Colebrook, CT	11 GWh	Oct 2015	May 2026	Wind
Wilmington Solar	MN8 Energy LLC	Wilmington, MA	2 GWh	Oct 2015	Dec 2025	Solar
Bridgewater Complex Co-Generation Plant	Massachusetts Department of Correction	Bridgewater, MA	1 GWh	Oct 2015	Dec 2025	Natural Gas
Oakfield Wind Project	Onward Energy	City of Oakfield, ME	340 GWh	Sep 2015	May 2026	Wind
North Adams Landfill	Syncarpha North Adams, LLC	North Adams, MA	3 GWh	Sep 2015	Dec 2025	Solar
115 G Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Sep 2015	Dec 2025	Solar
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	21 GWh	Jul 2015	May 2026	Natural Gas
Bridgewater Solar CSG	MN8 Energy LLC	Bridgewater, MA	4 GWh	Jul 2015	Dec 2025	Solar
Halifax Solar	NuGen Capital Management	Halifax, MA	4 GWh	Jul 2015	Dec 2025	Solar
Johnston Solar	Concord New Energy	Town of Johnston, RI	2 GWh	Jun 2015	Dec 2025	Solar
Hardwick-Athol & Eagle Hill	Madison Energy Investments LLC	Hardwick, MA	2 GWh	Jun 2015	Sep 2025	Solar
Hampden	Altus Power America Management, LLC	Hampden, MA	5 GWh	Jun 2015	Dec 2025	Solar
Holliston Solar CSG	MN8 Energy LLC	Holliston, MA	1 GWh	Jun 2015	Dec 2025	Solar
Downing Parkway Solar	Downing Parkway Solar LLC	Pittsfield, MA	3 GWh	Jun 2015	Dec 2025	Solar
Leominster	Syncarpha Massachusetts, LLC	Leominster, MA	3 GWh	Apr 2015	Dec 2025	Solar
Fisher Road Solar	Fisher Road Solar I, LLC	Dartmouth, MA	7 GWh	Apr 2015	Dec 2025	Solar
UB Fuel Cell	UB Fuel Cell	Bridgeport, CT	10 GWh	Mar 2015	Dec 2025	Natural Gas
Freetown Solar	Mass Solar, LLC	Freetown, MA	6 GWh	Feb 2015	Dec 2025	Solar
Braley Road 2	Mass Solar, LLC	Freetown, MA	4 GWh	Feb 2015	Dec 2025	Solar
BlueWave Capital - Grafton (SREC II)	TerraForm Solar XVII, LLC	Grafton, MA	2 GWh	Feb 2015	Dec 2025	Solar
Stafford Hill Solar Hybrid	Green Mountain Power Corp	Rutland, VT	390 MWh	Feb 2015	May 2026	Solar
Kearsarge Southwick LLC	Kearsarge Solar LLC	Southwick, MA	5 GWh	Feb 2015	Dec 2025	Solar
Leicester One MA Solar LLC	CVI CleanCapital Solar 1 LLC	Leicester, MA	5 GWh	Dec 2014	Dec 2025	Solar
Twiss Street Solar	Citizens Enterprises Corporation	Westfield, MA	2 GWh	Dec 2014	Mar 2025	Solar
Chicopee River Solar	Citizens Enterprises Corporation	Springfield, MA	3 GWh	Dec 2014	Dec 2025	Solar
Chicopee Granby Road Solar	Citizens Enterprises Corporation	Chicopee, MA	2 GWh	Dec 2014	Dec 2025	Solar
Natick Mall	Natick Mall	Natick, MA	4 GWh	Dec 2014	Dec 2024	Solar
Saddleback Ridge Wind Farm	CPV Saddleback Ridge Wind, LLC	Carthage, ME	90 GWh	Nov 2014	Dec 2025	Wind
Charlton Solar I CSG	Charlton Solar I, LLC	Charlton, MA	5 GWh	Nov 2014	Dec 2025	Solar
Main Street Solar Project	Greenbacker Renewable Energy Corporation	Rutland, VT	2 GWh	Nov 2014	Dec 2025	Solar
Templeton	Sunny Templeton, LLC	Templeton, MA	2 GWh	Nov 2014	Dec 2025	Solar
Bourne (MA) - Holliston I	NVT LICENSES, LLC	Holliston, MA	3 GWh	Nov 2014	Dec 2025	Solar
Braintree Landfill Solar	Ameresco, Inc - Braintree	Braintree, MA	1 GWh	Nov 2014	Dec 2025	Solar
Park St	Greenbacker Renewable Energy Corporation	Rutland, VT	2 GWh	Nov 2014	Dec 2025	Solar
Barton Solar Farm	Barton Solar, LLC	Barton, VT	2 GWh	Oct 2014	Dec 2025	Solar
Chester Power Partners	Altus Power America Management, LLC	North Chester, VT	2 GWh	Oct 2014	Dec 2025	Solar
Advance Stores Company, Inc	Tesla Inc.	Enfield, CT	1 GWh	Oct 2014	Mar 2025	Solar
Whitcomb Solar Farm	ERWR Whitcomb Farm Solar LLC	Essex Junction, VT	3 GWh	Sep 2014	Dec 2025	Solar
Tolland Solar NG LLC	NuGen Capital Management	Tolland, MA	5 GWh	Sep 2014	Dec 2025	Solar
Technology Drive Solar	RWE Clean Energy	Brattleboro, VT	3 GWh	Aug 2014	Dec 2025	Solar
Brewster Landfill	Clean Focus Yield, LLC	Brewster, MA	2 GWh	Aug 2014	Dec 2025	Solar
Chatham Landfill	Clean Focus Yield, LLC	Chatham, MA	2 GWh	Aug 2014	Dec 2025	Solar
Barnstable Landfill	Clean Focus Yield, LLC	Marstons Mills, MA	5 GWh	Aug 2014	Dec 2025	Solar
Dennis Landfill	Clean Focus Yield, LLC	Dennis, MA	8 GWh	Aug 2014	Dec 2025	Solar
Shaffer	CD US Solar MT3, LLC	Billerica, MA	6 GWh	Aug 2014	Dec 2025	Solar
Mashpee Landfill Solar	Nautilus Solar Solutions	Mashpee, MA	2 GWh	Aug 2014	Dec 2025	Solar
Harwich Landfill	Clean Focus Yield, LLC	Harwich, MA	6 GWh	Jul 2014	Dec 2025	Solar
Backus Microgrid Project	Connecticut Mun Elec Engy Coop	Norwich, CT	843 MWh	Jul 2014	May 2026	Distillate Fuel Oil
Sullivan Solar	Altus Power America Management, LLC	New Bedford, MA	2 GWh	Jul 2014	Dec 2025	Solar
Coventry Photovoltaic, LLC	Coventry Photovoltaic, LLC	Coventry, VT	3 GWh	Jul 2014	Dec 2025	Solar
EDF Lancaster	CleanCapital Holdings	Lancaster, MA	5 GWh	Jun 2014	Dec 2025	Solar
Monson Solar	Altus Power America Management, LLC	Monson, MA	4 GWh	Jun 2014	Dec 2025	Solar
Clarendon Solar Farm	Clarendon Solar Farm, LLC	North Clarendon, VT	3 GWh	Jun 2014	Dec 2025	Solar
Claire Solar Farm	Claire Solar Partners LLC	South Burlington, VT	4 GWh	Jun 2014	Dec 2024	Solar
Hadley Solar NG, LLC	NuGen Capital Management	Hadley, MA	3 GWh	Jun 2014	Dec 2025	Solar
265 Pleasant Solar NG, LLC	NuGen Capital Management	Lunenburg, MA	1 GWh	Jun 2014	Dec 2025	Solar
Tisbury Landfill Solar	Clean Focus Yield, LLC	Tisbury, MA	2 GWh	Jun 2014	Dec 2025	Solar
Charlotte Solar LLC VT	Altus Power America Management, LLC	Charlotte, VT	3 GWh	Jun 2014	Dec 2025	Solar
New Bedford (MA) Plymouth	BWC Origination 4, LLC	Plymouth, MA	7 GWh	Jun 2014	Dec 2025	Solar
Upper Blackstone (MA) Treasure Valley	Nexamp Treasure Valley Solar, LLC	Rutland, MA	6 GWh	Jun 2014	Dec 2025	Solar
Oxford	CVI CleanCapital Solar 6	Oxford, MA	3 GWh	Jun 2014	Dec 2025	Solar
Stone Hill Solar CSG	MN8 Energy LLC	North Easton, MA	2 GWh	Jun 2014	Dec 2025	Solar
North Brookfield	Mass Solar, LLC	North Brookfield, MA	4 GWh	May 2014	Dec 2025	Solar
Fairview Farms Solar	NuGen Capital Management	Whately, MA	3 GWh	May 2014	Dec 2025	Solar
651 Chase Solar NG	NuGen Capital Management	Lunenburg, MA	4 GWh	May 2014	Dec 2025	Solar
Katama Farm	Clean Focus Yield, LLC	Edgartown, MA	2 GWh	May 2014	Dec 2025	Solar
Nunnepog	Clean Focus Yield, LLC	Edgartown, MA	2 GWh	May 2014	Dec 2025	Solar
Lepomis PV Energy LLC	CleanCapital Holdings	Plymouth, MA	8 GWh	May 2014	Dec 2025	Solar
Devens	Altus Power America Management, LLC	Shirley, MA	5 GWh	May 2014	Dec 2025	Solar
Ayers Village Solar	Altus Power America Management, LLC	Methuen, MA	3 GWh	May 2014	Dec 2025	Solar
Antares-GRE 314 East Lyme LLC	MN8 Energy LLC	East Lyme, CT	4 GWh	May 2014	May 2026	Solar
Chester Solar Farm	Kearsarge Solar LLC	Chester, MA	6 GWh	May 2014	Dec 2025	Solar
205 Sturbridge A	Altus Power America Management, LLC	Brimfield, MA	4 GWh	May 2014	Dec 2025	Solar
201 Sturbridge B	Altus Power America Management, LLC	Brimfield, MA	2 GWh	May 2014	Dec 2025	Solar
Southern Sky Renew Energy Berkley LLC	Southern Sky Renewable Energy Berkley, LLC	Berkley, MA	4 GWh	May 2014	Dec 2025	Solar
Hartford Landfill Solar EGF	Materials Innovation Recycling Authority	Hartford, CT	1 GWh	May 2014	Dec 2024	Solar
Green Meadows	Altus Power America Management, LLC	Sandwich, MA	5 GWh	Apr 2014	Dec 2025	Solar
Mass Midstate Solar 3	Evergreen Wind, LLC	Warren, MA	6 GWh	Apr 2014	Dec 2025	Solar
Mass Midstate Solar 2	Evergreen Wind, LLC	Warren, MA	7 GWh	Apr 2014	Dec 2025	Solar
Mass Midstate Solar 1	Evergreen Wind, LLC	Warren, MA	7 GWh	Apr 2014	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