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
Gorge 18	Green Mountain Power Corp	South Burlington, VT	15 GWh	Dec 1927	Dec 2025	Water
Chittenden County Solar Partners	Chittenden County Solar Partners LLC	South Burlington, VT	3 GWh	Apr 2011	Dec 2025	Solar
Claire Solar Farm	Claire Solar Partners LLC	South Burlington, VT	4 GWh	Jun 2014	Dec 2025	Solar
Federal Road Solar 1, LLC CSG	Federal Road Solar 1, LLC	South Carver, MA	8 GWh	Nov 2015	Dec 2025	Solar
Old Frontier Solar III	Old Frontier Solar III PV, LLC	South Deerfield, MA	4 GWh	Aug 2022	Dec 2025	Solar
Northbridge Solar	RWE Clean Energy	South Grafton, MA	3 GWh	Jul 2013	Dec 2025	Solar
Kearsarge SKSC2 LLC	Kearsarge SKSC2 LLC	South Kingstown, RI	6 GWh	Sep 2018	Dec 2025	Solar
Kearsarge SKSC1 LLC	Kearsarge SKSC1 LLC	South Kingstown, RI	5 GWh	Sep 2018	Dec 2025	Solar
ISM Solar Shepherd Acres	Navisun LLC	South Paris, ME	4 GWh	Nov 2024	Dec 2025	Solar
Bird Machine Solar Farm	Bird Machine Solar Farm, LLC	South Walpole, MA	6 GWh	Jul 2017	Dec 2025	Solar
South Windsor Fuel Cell	South Energy Investments LLC	South Windsor, CT	37 GWh	Feb 2020	Dec 2025	Natural Gas
Ticket Network South Windsor	Powerflex	South Windsor, CT	2 GWh	Apr 2018	Dec 2024	Solar
ALDI DC 2	Powerflex	South Windsor, CT	1 GWh	Jan 2018	Dec 2025	Solar
Southampton Solar PV	NSTAR Electric Company	Southampton, MA	3 GWh	Jan 2019	Dec 2025	Solar
Southbridge Landfill Gas-to-Energy	Southbridge Recycling and Disposal Park	Southbridge, MA	10 GWh	Sep 2011	Dec 2025	Landfill Gas
Southbridge PV	Terraform Arcadia	Southbridge, MA	4 GWh	Dec 2013	Dec 2025	Solar
Southbridge Solar	AES Distributed Energy	Southbridge, MA	2 GWh	Feb 2016	Jul 2026	Solar
Annese Solar Project Hybrid CSG	AES Distributed Energy	Southbridge, MA	8 GWh	Nov 2020	Dec 2025	Solar
West A&B Solar Project Hybrid CSG	AES Distributed Energy	Southbridge, MA	5 GWh	Nov 2020	Dec 2025	Solar
Dudley River 3 Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	2 GWh	Oct 2017	Dec 2025	Solar
Alicea Solar Project Hybrid CSG	AES Distributed Energy	Southbridge, MA	4 GWh	Nov 2020	Dec 2025	Solar
Dudley River 2 Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	2 GWh	Oct 2017	Dec 2025	Solar
Dudley River Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	2 GWh	Oct 2017	Dec 2025	Solar
ZPD-PT Solar Project 2017-023 LLC Hybrid	AES Distributed Energy	Southbridge, MA	4 GWh	Dec 2020	Dec 2025	Solar
Cohasse Solar, LLC CSG	38 Degrees North, LLC	Southbridge, MA	1 GWh	Sep 2017	Dec 2025	Solar
Dresser Hill CSG	Dresser Hill Solar, LLC	Southbridge, MA	6 GWh	Dec 2020	Dec 2025	Solar
Shepaug	FirstLight Power Resources Services LLC	Southbury, CT	93 GWh	Dec 1954	Dec 2025	Water
Southington Solar One	DG Connecticut III, LLC	Southington, CT	9 GWh	Jan 2022	Dec 2025	Solar
Southwick Solar, LLC Community Solar	Navisun LLC	Southwick, MA	4 GWh	Apr 2025	Dec 2025	Solar
Goose Pond Solar	LSE Dorado, LLC	Southwick, MA	7 GWh	Dec 2019	Dec 2025	Solar
Sunpin Blandford	Blandford Sun, LLC	Southwick, MA	6 GWh	May 2020	Dec 2025	Solar
Southwick Solar PV	NSTAR Electric Company	Southwick, MA	8 GWh	Dec 2018	Jul 2026	Solar
Kearsarge Southwick LLC	Kearsarge Solar LLC	Southwick, MA	5 GWh	Feb 2015	Dec 2025	Solar
SJA Solar LLC-Solterra Monastery CSG	SJA Solar, LLC	Spencer, MA	24 GWh	Nov 2016	Dec 2025	Solar
Wilson Solar (MA)	RWE Clean Energy	Spencer, MA	870 MWh	May 2013	Dec 2025	Solar
Spencer Solar MA	Citizens Enterprises Corporation	Spencer, MA	4 GWh	Feb 2020	Dec 2025	Solar
Spencer Solar CSG	Madison Energy Investments LLC	Spencer, MA	584 MWh	May 2025	Dec 2025	Solar
Woodchuck Solar, LLC CSG	38 Degrees North, LLC	Spencer, MA	2 GWh	Nov 2017	Dec 2025	Solar
Cycz Solar Project CSG Hybrid	AES Distributed Energy	Spencer, MA	3 GWh	May 2020	Dec 2025	Solar
Blair Wire Village Solar, LLC CSG	38 Degrees North, LLC	Spencer, MA	2 GWh	Nov 2017	Dec 2025	Solar
ZPD-PT Solar Project 2017-044 LLC CSG	AES Distributed Energy	Spencer, MA	812 MWh	Sep 2021	Dec 2025	Solar
Oak Street Solar	Citizens Enterprises Corporation	Springfield, MA	5 GWh	Nov 2019	Dec 2025	Solar
Cottage Street Solar Facility	Western Massachusetts Electric Company	Springfield, MA	4 GWh	Apr 2014	Jul 2026	Solar
Springfield Solar PV	NSTAR Electric Company	Springfield, MA	6 GWh	Dec 2018	Dec 2025	Solar
Indian Orchard Plant 1	Solutia Inc-Indian	Springfield, MA	10 GWh	Apr 1985	Jul 2026	Natural Gas
Indian Orchard PV Facility	Western Massachusetts Electric Company	Springfield, MA	2 GWh	Nov 2011	Dec 2025	Solar
Smith & Wesson at Springfield MA PV	Luminace Solar Massachusetts, LLC	Springfield, MA	2 GWh	Jun 2017	Dec 2025	Solar
East Springfield Solar PV	NSTAR Electric Company	Springfield, MA	2 GWh	Sep 2018	Dec 2025	Solar
Chicopee River Solar	Citizens Enterprises Corporation	Springfield, MA	3 GWh	Dec 2014	Dec 2025	Solar
NE Renewable Springfield, LLC	NE Renewable Springfield, LLC	Springfield, NH	73 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids
St. Albans SPEED Project	St. Albans Solar Partners, LLC	St. Albans, VT	2 GWh	Nov 2013	Dec 2025	Solar
Golden Solar	Cardinal Renewables	St. Johnsbury, VT	4 GWh	Oct 2021	Dec 2025	Solar
Stafford MS Ground Mount Community Solar	Town of Stafford - (CT)	Stafford, CT	3 GWh	Jun 2016	Dec 2025	Solar
Waterside Power, LLC	Waterside Power, LLC	Stamford, CT	2 GWh	May 2003	Dec 2025	Distillate Fuel Oil
Stamford Health Tully Health Center	Stamford Health Tully Health Center	Stamford, CT	5 GWh	Apr 2002	Dec 2025	Natural Gas
Standish	Nautilus Solar Solutions	Standish, ME	7 GWh	Sep 2023	Dec 2025	Solar
MA Solar Storage 1 Hybrid	Origis Energy USA, Inc	Sterling, MA	1 GWh	Feb 2018	Dec 2025	Solar
CES Sterling LLC	SunEdison LLC	Sterling, MA	3 GWh	Jan 2013	Dec 2025	Solar
Stillwater Hydro Station	Brookfield Black Bear Hydro, LLC	Stillwater, ME	6 GWh	Dec 1912	Dec 2025	Water
UCONN Cogen Facility	University of Connecticut	Storrs, CT	111 GWh	Feb 2006	Jul 2026	Natural Gas : 95.1% Distillate Fuel Oil : 4.9%
Shuman Solar	NuGen Capital Management	Stoughton, MA	2 GWh	Mar 2016	Dec 2025	Solar
Stow PV	AES Distributed Energy	Stow, MA	3 GWh	Nov 2013	Dec 2025	Solar
Nebraska Valley Solar Farm	Town of Stowe - (VT)	Stowe, VT	1 GWh	Jul 2016	Dec 2025	Solar
Sikorsky Aircraft CHP	Sikorsky Aircraft Corporation	Stratford, CT	65 GWh	May 2010	Dec 2025	Natural Gas : 99.9%
ReEnergy Stratton LLC	ReEnergy Stratton LLC	Stratton, ME	200 GWh	Oct 1989	Dec 2025	Wood/Wood Waste Solids
BWC Origination 8 LLC Sturbridge 2	BWC Origination 8 LLC Sturbridge 2 LLC	Sturbridge, MA	1 GWh	Aug 2017	Dec 2025	Solar
BWC Origination 8 LLC Sturbridge 1	BWC Origination 8 LLC Sturbridge 1 LLC	Sturbridge, MA	1 GWh	Jul 2017	Dec 2025	Solar
Sudbury Landfill	Heliovaas LLC	Sudbury, MA	1 GWh	Nov 2013	Dec 2025	Solar
Sudbury Solar	Ecos Energy LLC	Sudbury, VT	2 GWh	Apr 2016	Dec 2025	Solar
Canis Major Solar Farm	LSE Canis Major LLC	Suffield, CT	3 GWh	Nov 2016	Dec 2025	Solar
Pembroke Hydro	Eagle Creek Renewable Energy, LLC	Suncook, NH	7 GWh	Nov 1985	Dec 2025	Water
Sunderland Solar PV	NSTAR Electric Company	Sunderland, MA	2 GWh	Aug 2018	Dec 2025	Solar
Sutton Solar CSG	Sutton Solar, LLC	Sutton, MA	3 GWh	Oct 2016	Dec 2025	Solar
Sutton Solar 2, LLC CSG	Sutton Solar 2, LLC	Sutton, MA	1 GWh	Nov 2020	Dec 2025	Solar
433 Purchase Solar NG, LLC	NuGen Capital Management	Swansea, MA	4 GWh	Mar 2012	Dec 2025	Solar
VPPSA Project 10	Vermont Public Power Supply Authority	Swanton, VT	1 GWh	Apr 2010	Dec 2025	Distillate Fuel Oil
Hancock Wind Plant	Onward Energy	T22 MD, ME	115 GWh	Nov 2016	Jul 2026	Wind
Taftville	FirstLight Power Resources Services LLC	Taftville, CT	2 GWh	Dec 1905	Dec 2025	Water
White Lake	Granite Shore Power	Tamworth, NH	594 MWh	Jun 1968	Dec 2025	Jet Fuel
NE Renewable Tamworth, LLC	NE Renewable Tamworth, LLC	Tamworth, NH	78 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids
MM Taunton Energy	MM Taunton Energy LLC	Taunton, MA	7 GWh	Aug 1997	Dec 2025	Landfill Gas
Cleary Flood Hybrid	City of Taunton - (MA)	Taunton, MA	54 GWh	May 1966	Dec 2025	Natural Gas : 94.0% Distillate Fuel Oil : 6.0%
West Water Street	City of Taunton - (MA)	Taunton, MA	2 GWh	Dec 2017	Dec 2025	Distillate Fuel Oil
Templeton	Sunny Templeton, LLC	Templeton, MA	2 GWh	Nov 2014	Dec 2025	Solar
Leominster (MA)-South Street-R&D	South Street Solar, LLC	Tewksbury, MA	3 GWh	Nov 2013	Dec 2025	Solar
Syncarpha Tewksbury Hybrid CSG	Syncarpha Tewksbury, LLC	Tewksbury, MA	4 GWh	Jan 2022	Dec 2025	Solar
Barrett Farm Solar - Phase I	Onyx Asset Services Group	Thompson, CT	3 GWh	Sep 2017	Dec 2025	Solar
Lochmere Hydroelectric Plant	Eagle Creek Renewable Energy, LLC	Tilton, NH	2 GWh	Nov 1984	Oct 2025	Water
Clement Dam Hydro LLC	Eagle Creek Renewable Energy, LLC	Tilton, NH	7 GWh	Nov 1984	Oct 2025	Water
Tisbury Landfill Solar	Clean Focus Yield, LLC	Tisbury, MA	2 GWh	Jun 2014	Dec 2025	Solar
Tiverton Power Plant	Tiverton Power LLC	Tiverton, RI	2 TWh	Feb 2000	Dec 2025	Natural Gas
1519 Crandall Road	1519 Crandall Road LLC	Tiverton, RI	6 GWh	Nov 2020	Dec 2025	Solar
Rhode Island Solar Renewable Energy IV,	Rhode Island Solar Renewable Energy IV, LLC	Tiverton, RI	18 GWh	Nov 2023	Dec 2025	Solar
Kearsarge Fogland	Kearsarge Fogland LLC	Tiverton, RI	3 GWh	Oct 2020	Dec 2025	Solar
Tolland	Sunrise on Clubhouse Rd. LLC	Tolland, MA	8 GWh	Nov 2020	Dec 2025	Solar
Tolland Solar NG LLC	NuGen Capital Management	Tolland, MA	5 GWh	Sep 2014	Dec 2025	Solar
Pejepscot Hydroelectric Project	Topsham Hydro Partners	Topsham, ME	50 GWh	Oct 1987	Dec 2025	Water
Torrington	Connecticut Jet Power LLC	Torrington, CT	277 MWh	Oct 1967	Dec 2025	Kerosene
Franklin Drive	Connecticut Jet Power LLC	Torrington, CT	294 MWh	Oct 1968	Dec 2025	Kerosene
Torrington Solar One, LLC	DG Connecticut III, LLC	Torrington, CT	3 GWh	Feb 2021	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