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	Oct 2026
Annual Generation	112.2 TWh
Power Plants	1,667
Utilities	846
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% Nuclear \| 25.3% Wind \| 5.7% Water \| 4.6% Other Fuel \| 4.5% Solar \| 1.6% Coal \| 0%

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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
Fox Island Wind LLC	Fox Island Wind LLC	Vinalhaven, ME	9 GWh	Oct 2009	Dec 2025	Wind
Notus Wind 1	Notus Clean Energy LLC	E. Falmouth, MA	5 GWh	Jun 2010	Dec 2025	Wind
Dartmouth Solar	RWE Clean Energy	Dartmouth, MA	2 GWh	Feb 2011	Dec 2025	Solar
Chittenden County Solar Partners	Chittenden County Solar Partners LLC	South Burlington, VT	3 GWh	Apr 2011	Dec 2025	Solar
Record Hill Wind	Record Hill Wind LLC	Roxbury, ME	110 GWh	Dec 2011	Dec 2025	Wind
Bridge Street 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	452 MWh	Jun 2010	Dec 2025	Distillate Fuel Oil
Fishers Island 1	Connecticut Mun Elec Engy Coop	Fisher's Island, NY	129 MWh	Nov 2010	Dec 2025	Distillate Fuel Oil
Gary Court 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	381 MWh	Jun 2010	Dec 2025	Distillate Fuel Oil
Jewett City 1	Connecticut Mun Elec Engy Coop	Jewett City, CT	139 MWh	Jan 2010	Dec 2025	Distillate Fuel Oil
LNG 1 & 2	Connecticut Mun Elec Engy Coop	Norwich, CT	382 MWh	Mar 2010	Dec 2025	Distillate Fuel Oil
Lebanon Pines 1 & 2	Connecticut Mun Elec Engy Coop	Lebanon, CT	374 MWh	Mar 2010	Dec 2025	Distillate Fuel Oil
Foxwoods CoGen	Foxwoods Resort Casino	Mashantucket, CT	11 GWh	May 2010	Dec 2025	Natural Gas
Indian Orchard PV Facility	Western Massachusetts Electric Company	Springfield, MA	2 GWh	Nov 2011	Dec 2025	Solar
Silver Lake Solar Photovoltaic Facility	Western Massachusetts Electric Company	Pittsfield, MA	2 GWh	Nov 2010	Dec 2025	Solar
Dartmouth II Solar	RWE Clean Energy	Dartmouth, MA	3 GWh	May 2012	Dec 2025	Solar
Ipswich Wind Turbine	Town of Ipswich - (MA)	Ipswich, MA	2 GWh	Apr 2011	Dec 2025	Wind
Holyoke Solar Cooperative at Mueller	Holyoke Solar LLC	Holyoke, MA	4 GWh	Nov 2011	Dec 2025	Solar
Douglas Solar	RWE Clean Energy	Douglas, MA	3 GWh	Nov 2012	Dec 2025	Solar
Town of Uxbridge MA at Commerce Dr	Luminace Solar Net Metering, LLC	Uxbridge, MA	2 GWh	May 2012	Dec 2025	Solar
Town of Norfolk MA at Medway Branch	Luminace Solar Massachusetts, LLC	Norfolk, MA	2 GWh	May 2012	Dec 2025	Solar
Groveland Solar	RWE Clean Energy	Groveland, MA	4 GWh	Nov 2012	Dec 2025	Solar
Shrewsbury Solar	RWE Clean Energy	Shrewsbury, MA	4 GWh	Sep 2012	Dec 2025	Solar
Boston Scientific Solar	RWE Clean Energy	Quincy, MA	1 GWh	Nov 2012	Dec 2025	Solar
Spruce Mountain WInd	CPV Spruce Mountain Wind LLC	Bryant Pond, ME	53 GWh	Nov 2011	Dec 2025	Wind
Padelford Solar	RWE Clean Energy	Berkley, MA	4 GWh	Nov 2012	Dec 2025	Solar
Burgess BioPower	Berlin Station, LLC	Berlin, NH	390 GWh	Oct 2013	Dec 2025	Wood/Wood Waste Solids
Charlestown Wind Turbine	MWRA Charlestown	Charlestown, MA	1 GWh	Sep 2011	Dec 2025	Wind
Kimberly Clark-Unit 1,2,3	Kimberly-Clark Corporation	New Milford, CT	233 GWh	Mar 2008	Dec 2025	Natural Gas
Green Meadows	Altus Power America Management, LLC	Sandwich, MA	5 GWh	Apr 2014	Dec 2025	Solar
SVEP Solar Project Company	CVI CleanCapital Solar 1 LLC	Pownal, VT	2 GWh	Nov 2012	Dec 2025	Solar
Williamstown Solar	CVI CleanCapital Solar 1 LLC	Williamstown, VT	2 GWh	Nov 2012	Dec 2025	Solar
Danbury Hospital Cogen Plant	Danbury Hospital	Danbury, CT	22 GWh	Oct 2011	Dec 2025	Natural Gas
Wesleyan University Cogen 1	Wesleyan University	Middletown, CT	4 GWh	Jan 2009	Dec 2025	Natural Gas
Williams College - Campus CHP	President & Trustees of Williams College	Williamstown, MA	3 GWh	Feb 2003	Dec 2025	Natural Gas : 98.4% Distillate Fuel Oil : 1.6%
Smith College Central Heating Plant	The Trustees of Smith College	Northampton, MA	6 GWh	Sep 2008	Dec 2025	Natural Gas
Wilson Solar (MA)	RWE Clean Energy	Spencer, MA	870 MWh	May 2013	Dec 2025	Solar
Amherst College Co Gen	Amherst College	Amherst, MA	8 GWh	Oct 2006	Dec 2025	Natural Gas
NFM Solar Power LLC	FirstLight Power Resources, Inc. - MA	Northfield, MA	2 GWh	Feb 2012	Dec 2025	Solar
CCSU Co-Gen-STBY Gen	Central Connecticut State University	New Britain, CT	10 MWh	Sep 1993	Dec 2025	Natural Gas
CCSU Fuel Cell Project	New Britain Renewable Energy, LLC	New Britain, CT	7 GWh	Mar 2012	Dec 2025	Natural Gas
Acushnet AD Makepeace	CleanCapital Holdings	Wareham, MA	6 GWh	Jun 2012	Dec 2025	Solar
Acushnet Hawes Reed Road	CleanCapital Holdings	Dartmouth, MA	2 GWh	Jun 2012	Dec 2025	Solar
Easthampton Landfill-City of Easthampton	CleanCapital Holdings	Easthampton, MA	3 GWh	May 2012	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
Millbury Solar	Evergreen Wind, LLC	Millbury, MA	5 GWh	Mar 2014	Dec 2025	Solar
Leicester One MA Solar LLC	CVI CleanCapital Solar 1 LLC	Leicester, MA	5 GWh	Dec 2014	Dec 2025	Solar
Freetown Solar	Mass Solar, LLC	Freetown, MA	6 GWh	Feb 2015	Dec 2025	Solar
Bradley Energy Center	Ameresco Select Inc	Windsor Locks, CT	11 GWh	Oct 2002	Dec 2025	Natural Gas
Quittacas Pond Solar	RWE Clean Energy	Rochester, MA	5 GWh	Nov 2013	Dec 2025	Solar
Northbridge Solar	RWE Clean Energy	South Grafton, MA	3 GWh	Jul 2013	Dec 2025	Solar
CES Sterling LLC	SunEdison LLC	Sterling, MA	3 GWh	Jan 2013	Dec 2025	Solar
Bellingham PV	Terraform Arcadia	Douglas, MA	4 GWh	Sep 2013	Dec 2025	Solar
Marshfield PV	Terraform Arcadia	Marshfield, MA	5 GWh	Nov 2013	Dec 2025	Solar
Orange PV	Terraform Arcadia	Orange, MA	3 GWh	Jun 2013	Dec 2025	Solar
Maynard PV	Terraform Arcadia	Maynard, MA	1 GWh	Dec 2013	Dec 2025	Solar
Southbridge PV	Terraform Arcadia	Southbridge, MA	4 GWh	Dec 2013	Dec 2025	Solar
Westford Solar Park	MN8 Energy LLC	Westford, MA	4 GWh	Mar 2012	Dec 2025	Solar
SunGen Sharon 1 LLC	SunGen Sharon 1 LLC	Sharon, VT	2 GWh	Jul 2012	Dec 2025	Solar
Bridgeport Fuel Cell, LLC	Bridgeport Fuel Cell, LLC	Bridgeport, CT	90 GWh	Nov 2013	Dec 2025	Natural Gas
Somers Solar Center, LLC	Onward Energy	Somers, CT	9 GWh	Nov 2013	Dec 2025	Solar
Merrimac Solar	RWE Clean Energy	Merrimac, MA	2 GWh	Nov 2013	Dec 2025	Solar
Forbes Street Solar	Altus Power America Management, LLC	East Providence, RI	4 GWh	Nov 2013	Dec 2025	Solar
Town of East Bridgewater CSG	Tesla Inc.	East Bridgewater, MA	1 GWh	May 2013	Dec 2025	Solar
Saddleback Ridge Wind Farm	CPV Saddleback Ridge Wind, LLC	Carthage, ME	90 GWh	Nov 2014	Dec 2025	Wind
Canton Mountain Wind	CPV Canton Mountain Wind LLC	Canton, ME	56 GWh	Oct 2017	Dec 2025	Wind
Berkshire 1	PPS Berkshire Solar LLC	Sheffield, MA	2 GWh	Nov 2011	Dec 2025	Solar
North Brookfield	Mass Solar, LLC	North Brookfield, MA	4 GWh	May 2014	Dec 2025	Solar
Braley Road 2	Mass Solar, LLC	Freetown, MA	4 GWh	Feb 2015	Dec 2025	Solar
Dartmouth	Mass Solar, LLC	Dartmouth, MA	6 GWh	Mar 2014	Dec 2025	Solar
Axio Green LLC	Altus Power America Management, LLC	Greenfield Township, MA	2 GWh	May 2012	Dec 2025	Solar
Tihonet Solar	RWE Clean Energy	Wareham, MA	2 GWh	Apr 2014	Dec 2025	Solar
Sheldon Solar	Excelsior Energy Capital	Sheldon Springs, VT	2 GWh	Aug 2013	Dec 2025	Solar
Sudbury Landfill	Heliovaas LLC	Sudbury, MA	1 GWh	Nov 2013	Dec 2025	Solar
Berkley East Solar LLC	SunEdison LLC	Berkley, MA	5 GWh	Jun 2013	Dec 2025	Solar
Integrys MA Solar, LLC - Ashburnham Site	Integrys MA Solar, LLC	Ashburnham, MA	3 GWh	Nov 2013	Dec 2025	Solar
Open View Solar Farm	Cross Pollination Inc	New Haven, VT	3 GWh	Aug 2013	Dec 2025	Solar
Walpole Solar 2	Walpole Solar 2, LLC	Walpole, MA	4 GWh	Mar 2014	Dec 2025	Solar
Gardner Solar 1	Gardner Solar 1, LLC	Gardner, MA	3 GWh	Apr 2014	Dec 2025	Solar
Camelot Wind LLC	Camelot Wind LLC	Plymouth, MA	3 GWh	Sep 2012	Dec 2025	Wind
Technology Drive Solar	RWE Clean Energy	Brattleboro, VT	3 GWh	Aug 2014	Dec 2025	Solar
Fairview Farms Solar	NuGen Capital Management	Whately, MA	3 GWh	May 2014	Dec 2025	Solar
Southbridge Landfill Gas-to-Energy	Southbridge Recycling and Disposal Park	Southbridge, MA	10 GWh	Sep 2011	Dec 2025	Landfill Gas
Scituate PV	AES Distributed Energy	Scituate, MA	3 GWh	Sep 2013	Dec 2025	Solar
Bolton PV	AES Distributed Energy	Bolton, MA	6 GWh	Nov 2013	Dec 2025	Solar
Stow PV	AES Distributed Energy	Stow, MA	3 GWh	Nov 2013	Dec 2025	Solar
Agawam Solar	Citizens Enterprises Corporation	Agawam, MA	2 GWh	Feb 2012	Dec 2025	Solar
Rehoboth Solar	Citizens Enterprises Corporation	Rehoboth, MA	3 GWh	Nov 2013	Dec 2025	Solar
Chicopee Solar	Citizens Enterprises Corporation	Chicopee, MA	4 GWh	Nov 2013	Dec 2025	Solar
Route 57 Solar	Citizens Enterprises Corporation	Agawam, MA	2 GWh	Feb 2013	Dec 2025	Solar
EBZ Solar	Citizens Enterprises Corporation	Shirley, MA	3 GWh	Dec 2012	Dec 2025	Solar
Whately Solar	Citizens Enterprises Corporation	Whately, MA	2 GWh	Feb 2013	Dec 2025	Solar
Ball Mountain Hydro	Eagle Creek Renewable Energy, LLC	Jamaica, VT	995 MWh	Mar 2016	Dec 2025	Water
West Davisville Solar	Altus Power America Management, LLC	North Kingstown, RI	3 GWh	Nov 2013	Dec 2025	Solar
651 Chase Solar NG	NuGen Capital Management	Lunenburg, MA	4 GWh	May 2014	Dec 2025	Solar
Whitcomb Solar Farm	ERWR Whitcomb Farm Solar LLC	Essex Junction, VT	3 GWh	Sep 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
Harwich Landfill	Clean Focus Yield, LLC	Harwich, MA	6 GWh	Jul 2014	Dec 2025	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	433.0 GWh	4
#24	Dominion Energy South Carolina, Inc.	26.1 TWh	83
#13	Duke Energy Carolinas	113.4 TWh	578
#17	Duke Energy Progress East	66.2 TWh	574
#50	Duke Energy Progress West	4.6 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	34.2 TWh	25
#12	New York Independent System Operator	134.1 TWh	1,334
#1	PJM Interconnection, LLC	890.9 TWh	2,806
#28	South Carolina Public Service Authority	19.6 TWh	35
#59	Southeastern Power Administration	1.2 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	168.7 TWh	2,170
#9	Tennessee Valley Authority	166.2 TWh	209
#10	Florida Power & Light Co.	153.0 TWh	188
#12	New York Independent System Operator	134.1 TWh	1,334
#13	Duke Energy Carolinas	113.4 TWh	578
#15	ISO New England	112.2 TWh	1,667
#16	Bonneville Power Administration	91.1 TWh	170
#17	Duke Energy Progress East	66.2 TWh	574
#18	PacifiCorp East	61.4 TWh	223
#19	Salt River Project Agricultural Improvement and Power District	60.5 TWh	51