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	May 2025
Annual Generation	103.2 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 \| 57.3% Nuclear \| 24.7% Water \| 6.2% Other Fuel \| 4.5% Wind \| 3.6% 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
10 Briggs Solar NG, LLC (East)	NuGen Capital Management	East Greenwich, RI	8 GWh	May 2021	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
Hopkinton CSG	Altus Power America Management, LLC	Hopkinton, MA	3 GWh	Mar 2019	Dec 2023	Solar
Bridgewater Complex Co-Generation Plant	Massachusetts Department of Correction	Bridgewater, MA	9 GWh	Oct 2015	Dec 2023	Natural Gas
MHG Wallingford	Standard Solar	Wallingford, VT	4 GWh	Nov 2019	Dec 2023	Solar
CED Northampton Solar LLC Hybrid	Consolidated Edison Development Inc.	Northampton, MA	6 GWh	Nov 2019	Dec 2023	Solar
Nautilus Goat Island Solar LLC (CSG)	Nautilus Solar Solutions	Burrillville, RI	4 GWh	Jul 2019	Dec 2023	Solar
Happy Hollow CSG Hybrid	REA Investments, LLC	Winchendon, MA	8 GWh	Sep 2019	Dec 2023	Solar
Washburn Road Solar	REA Investments, LLC	Freetown, MA	3 GWh	Nov 2018	Dec 2023	Solar
Manchester Community College North	Onyx Asset Services Group	Great Path, CT	2 GWh	Sep 2018	Dec 2023	Solar
Manchester Community College East	Onyx Asset Services Group	Manchester, CT	1 GWh	Sep 2018	Dec 2023	Solar
West Water Street	City of Taunton	Taunton, MA	1 GWh	Dec 2017	Dec 2023	Distillate Fuel Oil
ALDI DC 2	EnterSolar	South Windsor, CT	2 GWh	Jan 2018	Dec 2023	Solar
Derby Fuel Cell	Derby Fuel Cell LLC	Derby, CT	8 GWh	-	Dec 2023	Natural Gas
Tanglewood Circle Solar 1 LLC	Tanglewood Circle Solar 1 LLC	Becket, MA	7 GWh	Oct 2018	Dec 2023	Solar
Tolland Solar NG LLC	NuGen Capital Management	Tolland, MA	5 GWh	Sep 2014	Dec 2023	Solar
Plainfield Community Solar LLC	Plainfield Solar LLC	Plainfield, MA	3 GWh	Jan 2019	Dec 2023	Solar
GD West Greenwich Victory I, LLC	GD West Greenwich Victory I, LLC	West Greenwich, RI	3 GWh	Nov 2019	Dec 2023	Solar
GD Richmond Buttonwoods I, LLC	GD Richmond Buttonwoods I, LLC	Richmond, RI	2 GWh	Nov 2019	Dec 2023	Solar
Kearsarge Wilmington	Kearsarge Wilmington LLC	Wilmington, MA	2 GWh	Nov 2017	Dec 2023	Solar
Kearsarge SKSC2 LLC	Kearsarge SKSC2 LLC	South Kingstown, RI	6 GWh	Sep 2018	Dec 2023	Solar
Kearsarge Montague	Kearsarge Montague LLC	Montague, MA	7 GWh	May 2018	Dec 2023	Solar
Kearsarge Uxbridge	Kearsarge Uxbridge LLC	Uxbridge, MA	3 GWh	Aug 2018	Dec 2023	Solar
Kearsarge SKSC1 LLC	Kearsarge SKSC1 LLC	South Kingstown, RI	6 GWh	Sep 2018	Dec 2023	Solar
Kearsarge GB	Kearsarge GB LLC	Great Barrington, MA	3 GWh	Jul 2018	Dec 2023	Solar
Winchendon Landfill Solar	Onyx Asset Services Group	Winchendon, MA	3 GWh	Sep 2018	Dec 2023	Solar
Digital Fairfield	Bloom Energy	Trumbull, CT	13 GWh	May 2018	Dec 2023	Natural Gas
Westminster	MN8 Energy LLC	Westminster, VT	3 GWh	Nov 2016	Dec 2023	Solar
BWC Pocasset River	BWC Pocasset River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2023	Solar
BWC Harlow Brook	BWC Harlow Brook, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2023	Solar
BWC Wareham River	BWC Wareham River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2023	Solar
BWC Gibbs Brook	BWC Gibbs Brook, LLC	Wareham, MA	7 GWh	Nov 2018	Dec 2023	Solar
BWC Origination 18	BWC Origination 18, LLC	Mattapoisett, MA	7 GWh	Nov 2018	Dec 2023	Solar
Barre Solar III LLC	AES Distributed Energy	Barre, MA	1 GWh	Feb 2018	Dec 2023	Solar
Dynamic - Walpole	AES Distributed Energy	Walpole, MA	3 GWh	May 2017	Dec 2023	Solar
North Stonington Solar Center, LLC	Adapture Renewables, Inc.	North Stonington, CT	31 GWh	Sep 2022	Dec 2023	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	1 GWh	May 2018	Dec 2023	Solar
Lee Site 31 Solar	NSTAR Electric Company	Lee, MA	2 GWh	Jul 2018	Dec 2023	Solar
Pittsfield 44 - M&W PV	NSTAR Electric Company	Pittsfield, MA	2 GWh	Jul 2018	Dec 2023	Solar
Westminster Renewables, LLC CSG	Westminster Renewables, LLC	Westminster, MA	2 GWh	Sep 2018	Dec 2023	Solar
Monson Solar, LLC	Monson Solar, LLC	Monson, MA	3 GWh	Jul 2017	Dec 2023	Solar
Williamsburg	AES Distributed Energy	Goshen, MA	6 GWh	Jun 2019	Dec 2023	Solar
Dudley Solar CSG	Dudley Solar, LLC	Dudley, MA	3 GWh	Jul 2017	Dec 2023	Solar
Ashby Solar, LLC CSG	Ashby Solar, LLC	Fitchburg, MA	3 GWh	Jun 2018	Dec 2023	Solar
Griffin Road Solar, LLC CSG	Griffin Road Solar, LLC	Charlton, MA	3 GWh	Feb 2018	Dec 2023	Solar
Stafford St Solar 1 CSG	Stafford St Solar 1, LLC	Leicester, MA	12 GWh	Nov 2017	Dec 2023	Solar
301 Chestnut Solar NG	NuGen Capital Management	East Longmeadow, MA	2 GWh	Mar 2017	Dec 2023	Solar
North Smithfield Solar Power 1	AEP Onsite Partners, LLC	North Smithfield, RI	919 MWh	Nov 2018	Dec 2023	Solar
IOS - MEW Phase 1	IGS ORIX Solar I, LLC	Madison, ME	5 GWh	Dec 2016	Dec 2023	Solar
Big George PV CSG	Altus Power America Management, LLC	Plymouth, MA	1 GWh	Aug 2018	Dec 2023	Solar
West Boylston Community Shared Solar	Town of West Boylston - (MA)	West Boylston, MA	2 GWh	Nov 2016	Dec 2023	Solar
Canis Minor Solar Farm	LSE Canis Minor LLC	Barkhamsted, CT	2 GWh	Nov 2016	Dec 2023	Solar
Ashby Duffy CSG Solar Farm	LSE Cassiopeia LLC	Ashby, MA	3 GWh	Nov 2017	Dec 2023	Solar
Canis Major Solar Farm	LSE Canis Major LLC	Suffield, CT	4 GWh	Nov 2016	Dec 2023	Solar
Kearsarge Bellingham PV	Kearsarge Bellingham LLC	Bellingham, MA	5 GWh	Nov 2016	Dec 2023	Solar
Centaurus Solar - MA	LSE Centaurus LLC	Ashland, MA	4 GWh	Oct 2016	Dec 2023	Solar
Smith & Wesson at Springfield MA PV	Luminace Solar Massachusetts, LLC	Springfield, MA	2 GWh	Jun 2017	Dec 2023	Solar
MDFA Devens-Saratoga	Terraform Arcadia	Devens, MA	3 GWh	Feb 2016	Dec 2023	Solar
Barrett PV	MN8 Energy LLC	Oxford, MA	17 GWh	Oct 2016	Dec 2023	Solar
Grafton PV	MN8 Energy LLC	Grafton, MA	4 GWh	Sep 2016	Dec 2023	Solar
Next Generation Solar Farm	Cypress Creek Renewables	New Haven, VT	4 GWh	Nov 2017	Dec 2023	Solar
Golden Hills Solar	Golden Hills Solar, LLC	Rutland, MA	8 GWh	Aug 2017	Dec 2023	Solar
Sampson Road Community Solar	Sampson Road Solar, LLC	Charlton, MA	3 GWh	Nov 2017	Dec 2023	Solar
Peterson Road Solar	Peterson Road Solar, LLC	Palmer, MA	4 GWh	Mar 2017	Dec 2023	Solar
Hatfield Renewables Community Solar	Hatfield Renewables, LLC	Hatfield, MA	3 GWh	Aug 2017	Dec 2023	Solar
Pleasantdale Road Community Solar	Pleasantdale Road Solar, LLC	Rutland, MA	1 GWh	Aug 2017	Dec 2023	Solar
Upton Community Solar	Upton Solar, LLC	Upton, MA	3 GWh	Aug 2017	Dec 2023	Solar
Theodore Drive Community Solar	Theodore Drive Solar, LLC	Westminster, MA	2 GWh	Feb 2018	Dec 2023	Solar
Belchertown Renewables Community Solar	Belchertown Renewables, LLC	Belchertown, MA	6 GWh	Feb 2018	Dec 2023	Solar
Farley Road Community Solar	Farley Road Solar, LLC	Dudley, MA	2 GWh	Jul 2017	Dec 2023	Solar
Vuelta Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2023	Solar
Shuman Solar	NuGen Capital Management	Stoughton, MA	2 GWh	Mar 2016	Dec 2023	Solar
Old Wardour Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2023	Solar
433 Purchase Solar NG, LLC	NuGen Capital Management	Swansea, MA	4 GWh	Mar 2012	Dec 2023	Solar
Boston Medical Center CHP Plant	Boston Medical Center	Boston, MA	12 GWh	Mar 2017	Dec 2023	Natural Gas
Nebraska Valley Solar Farm	Town of Stowe- (VT)	Stowe, VT	1 GWh	Jul 2016	Dec 2023	Solar
Elizabeth Mines Solar 1	Elizabeth Mines Solar 1, LLC	So. Strafford, VT	7 GWh	Oct 2017	Dec 2023	Solar
Syncarpha Freetown	Marie's Way Solar I, LLC	Freetown, MA	7 GWh	Oct 2016	Dec 2023	Solar
BWC Wading River One, Two, Three CSG	Ameresco BWC Wading River LLC	Mendon, MA	5 GWh	Oct 2017	Dec 2023	Solar
Stafford St Solar 3 CSG	Stafford St Solar 3, LLC	Leicester, MA	2 GWh	Nov 2017	Dec 2023	Solar
Stafford St 2 Community Solar	Stafford St Solar 2, LLC	Lecister, MA	3 GWh	Apr 2018	Dec 2023	Solar
Cedarville CSG	Altus Power America Management, LLC	Plymouth, MA	4 GWh	Jun 2017	Dec 2023	Solar
Iron Horse Solar I CSG	Iron Horse Solar 1, LLC	North Billerica, MA	4 GWh	Nov 2016	Dec 2023	Solar
Bird Machine Solar Farm	Bird Machine Solar Farm, LLC	South Walpole, MA	6 GWh	Jul 2017	Dec 2023	Solar
Depot Hill Solar CSG	CCC Solar Holdings LLC	Charlton, MA	3 GWh	Sep 2016	Dec 2023	Solar
Curtis Hill Solar CSG	CCC Solar Holdings LLC	Charlton, MA	3 GWh	Sep 2016	Dec 2023	Solar
Town of Lexington Solar	Syncarpha Lexington, LLC	Lexington, MA	2 GWh	Apr 2017	Dec 2023	Solar
Branford	Connecticut Jet Power LLC	Branford, CT	68 MWh	Oct 1967	Dec 2023	Kerosene
Iron Horse Solar 4, LLC	Iron Horse Solar 4, LLC	North Billerica, MA	7 GWh	May 2017	Dec 2023	Solar
Deerfield CSG Solar	MN8 Energy LLC	Deerfield, MA	6 GWh	Nov 2017	Dec 2023	Solar
Fall River Solar CSG	MN8 Energy LLC	Fall River, MA	3 GWh	Jan 2013	Dec 2023	Solar
Stone Hill Solar CSG	MN8 Energy LLC	North Easton, MA	3 GWh	Jun 2014	Dec 2023	Solar
Bridgewater Solar CSG	MN8 Energy LLC	Bridgewater, MA	4 GWh	Jul 2015	Dec 2023	Solar
Holliston Solar CSG	MN8 Energy LLC	Holliston, MA	1 GWh	Jun 2015	Dec 2023	Solar
Wilmington Solar	MN8 Energy LLC	Wilmington, MA	3 GWh	Oct 2015	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
126 Grove Solar LLC	Altus Power America Management, LLC	Franklin, MA	2 GWh	May 2012	Dec 2023	Solar
Shirley Landfill	Altus Power America Management, LLC	Shirley, MA	1 GWh	Apr 2017	Dec 2023	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	727.7 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	65.1 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	858.5 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	190.1 TWh	1,943
#8	Tennessee Valley Authority	158.8 TWh	170
#10	Florida Power & Light Co.	148.3 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	103.2 TWh	1,487
#16	Bonneville Power Administration	82.2 TWh	158
#17	Duke Energy Progress East	65.1 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.7 TWh	45
#19	PacifiCorp East	57.2 TWh	204