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	Nov 2024
Annual Generation	102.8 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 \| 57.6% Nuclear \| 25% Water \| 7.7% Other Fuel \| 4.6% Wind \| 3.3% Solar \| 1.2% Coal \| 0.1%

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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
Pfizer Groton Fuel Cell	Groton Fuel Cell 1 LLC	Groton, CT	42 GWh	Sep 2016	Dec 2023	Natural Gas
Bridge Street 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	562 MWh	Jun 2010	Dec 2023	Distillate Fuel Oil
Gary Court 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	466 MWh	Jun 2010	Dec 2023	Distillate Fuel Oil
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	413 MWh	Sep 2010	Aug 2024	Distillate Fuel Oil
Subase Microgrid Project	Connecticut Mun Elec Engy Coop	Groton, CT	34 GWh	Nov 2022	Dec 2023	Natural Gas
Naval Sub Base New London Fuel Cell	Groton Station Fuel Cell, LLC	Groton, CT	34 GWh	Nov 2022	Dec 2023	Natural Gas
Pfizer Groton Plant	Pfizer Inc	Groton, CT	69 GWh	Dec 1947	Aug 2024	Natural Gas : 97.6% Distillate Fuel Oil : 2.4%
CMEEC - Navy NE Trident	Tesla Inc.	Groton, CT	1 GWh	May 2017	Dec 2023	Solar
GELD Solar Farm	Ameresco, Inc - GELD	Groton, MA	3 GWh	May 2016	Dec 2023	Solar
West Groton CHP	Hollingsworth & Vose Co West Groton	Groton, MA	20 GWh	Nov 2015	Dec 2023	Natural Gas
Groton Wind LLC	Avangrid Renewables LLC	Groton, NH	97 GWh	Nov 2012	Aug 2024	Wind
Groveland Solar	Consolidated Edison Development Inc.	Groveland, MA	4 GWh	Nov 2012	Dec 2023	Solar
Lost Nation	Granite Shore Power	Groveton, NH	428 MWh	Aug 1969	Dec 2023	Distillate Fuel Oil
Hadley 2 Solar, LLC CSG	Hadley 2 Solar, LLC	Hadley, MA	3 GWh	Nov 2016	Dec 2023	Solar
Hadley Solar NG, LLC	NuGen Capital Management	Hadley, MA	3 GWh	Jun 2014	Dec 2023	Solar
Hadley 3 Solar (North)	Hadley 3 Solar, LLC (North)	Hadley, MA	5 GWh	Nov 2019	Dec 2023	Solar
Hadley 3 Solar (South)	Hadley 3 Solar, LLC (South)	Hadley, MA	5 GWh	Nov 2019	Dec 2023	Solar
Halifax Solar	NuGen Capital Management	Halifax, MA	4 GWh	Jul 2015	Dec 2023	Solar
Syncarpha Halifax Hybrid CSG	Syncarpha Halifax, LLC	Halifax, MA	3 GWh	Nov 2020	Dec 2023	Solar : 99.0%
Hampden Solar PV	NSTAR Electric Company	Hampden, MA	5 GWh	Oct 2019	Dec 2023	Solar
Hampden	Altus Power America Management, LLC	Hampden, MA	5 GWh	Jun 2015	Dec 2023	Solar
Sydney Solar	Ecos Energy LLC	Hampton, CT	3 GWh	May 2020	Dec 2023	Solar
Dickinson Solar (CT)	Ecos Energy LLC	Hampton, CT	3 GWh	May 2020	Dec 2023	Solar
McHenry Solar	Ecos Energy LLC	Hampton, CT	2 GWh	Sep 2021	Dec 2023	Solar
Hampton Facility	Foss Manufacturing Company LLC	Hampton, NH	26 GWh	Sep 1978	Aug 2024	Natural Gas
Carver Falls	Green Mountain Power Corp	Hampton, NY	11 GWh	Jan 1922	Dec 2023	Water
Jiminy Peak Wind QF	Jiminy Peak Mountain Resort, LLC	Hancock, MA	1 MWh	Jul 2007	Dec 2022	Wind
Syncarpha Hancock I CSG	Syncarpha Hancock I, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2023	Solar
Syncarpha Hancock II CSG	Syncarpha Hancock II, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2023	Solar
Nexamp Peak CSG	Nexamp Peak, LLC	Hancock, MA	2 GWh	Nov 2015	Dec 2023	Solar
Dartmouth College Heating Plant	Dartmouth College	Hanover, NH	10 GWh	Dec 1969	Aug 2024	Residual Fuel Oil
Hardwick-Athol & Eagle Hill	SEC CRSD Solar One, LLC	Hardwick, MA	3 GWh	Jun 2015	Dec 2023	Solar
Billings Road	Greenbacker Renewable Energy Corporation	Hardwick, VT	2 GWh	Oct 2021	Dec 2023	Solar
ER Center Road Solar, LLC	Greenbacker Renewable Energy Corporation	Hardwick, VT	3 GWh	Apr 2022	Dec 2023	Solar
Harmony Solar	Maine DG Solar Harmony, LLC	Harmony, ME	9 GWh	Jul 2022	Dec 2023	Solar
Ocean State Power II	Ocean State Power II	Harrisville, RI	1 TWh	Sep 1991	Dec 2023	Natural Gas : 99.7%
Ocean State Power	Ocean State Power Co	Harrisville, RI	1 TWh	Nov 1990	Dec 2023	Natural Gas : 99.6%
Trinity College Fuel Cell	AEP Onsite Partners, LLC	Hartford, CT	9 GWh	Jul 2018	Dec 2023	Natural Gas
Hartford Hospital Cogeneration	Cartier Energy, LLC	Hartford, CT	44 GWh	Jun 1988	Dec 2023	Natural Gas : 99.8%
HSCo CHP	Cartier Energy, LLC	Hartford, CT	27 GWh	Sep 2009	Dec 2023	Natural Gas
South Meadow	NAES Corp	Hartford, CT	1 GWh	Jul 1970	Dec 2022	Kerosene
Hartford Landfill Solar EGF	Materials Innovation Recycling Authority	Hartford, CT	1 GWh	May 2014	Dec 2023	Solar
Wilder	Great River Hydro, LLC	Hartford, VT	192 GWh	Oct 1950	Dec 2023	Water
GMP Solar - Hartford	Green Mountain Power Corp	Hartford, VT	7 GWh	Nov 2016	Aug 2024	Solar
Hartland Solar	Madison Energy Holdings LLC	Hartland, ME	6 GWh	Nov 2021	Dec 2023	Solar
Harwich Landfill	Clean Focus Yield, LLC	Harwich, MA	6 GWh	Jul 2014	Dec 2023	Solar
Hatfield Renewables Community Solar	Hatfield Renewables, LLC	Hatfield, MA	3 GWh	Aug 2017	Dec 2023	Solar
Hatfield Solar PV	NSTAR Electric Company	Hatfield, MA	6 GWh	Nov 2018	Dec 2023	Solar
DG Haverhill CSG	DG Haverhill	Haverhill, MA	2 GWh	Aug 2017	Dec 2023	Solar
Haverhill Solar Power Project	Massachusetts Electric Co	Haverhill, MA	1 GWh	Nov 2010	Dec 2023	Solar
Covanta Haverhill	Ogden Projects Inc-Haverhill	Haverhill, MA	342 GWh	Apr 1989	Aug 2024	Non-biogenic Municipal Solid Waste : 54.9% Biogenic Municipal Solid Waste : 44.9%
Bradford Solar	Strata Manager, LLC	Haverhill, MA	7 GWh	Mar 2017	Dec 2023	Solar
Kearsarge Haverhill	Kearsarge Haverhill LLC	Haverhill, MA	4 GWh	Feb 2021	Dec 2023	Solar
Williamsburg Solar LLC VNEM CSG	Tesla Inc.	Haydenville, MA	3 GWh	Jan 2016	Dec 2023	Solar
Highgate Falls	Village of Swanton - (VT)	Highgate, VT	50 GWh	Jul 1923	Dec 2023	Water
Hillsborough Hosiery	Silverstreet Hydro	Hillsboro, NH	2 GWh	Nov 1989	Dec 2023	Water
Jackman	Central Rivers Power NH, LLC	Hillsborough, NH	13 GWh	Jan 1926	Dec 2023	Water
VEC Magee Hill Solar	SoCore Energy LLC	Hinesburgh, VT	2 GWh	Oct 2017	Dec 2023	Solar
Hinsdale Solar PV	NSTAR Electric Company	Hinsdale, MA	3 GWh	Dec 2018	Dec 2023	Solar
Hiram	Brookfield White Pine Hydro LLC	Hiram, ME	54 GWh	Dec 1916	Dec 2023	Water
Bonny Eagle	Brookfield White Pine Hydro LLC	Hollis, ME	45 GWh	Dec 1909	Dec 2023	Water
Bourne (MA) - Holliston I	NVT LICENSES, LLC	Holliston, MA	3 GWh	Nov 2014	Dec 2023	Solar
Holliston Solar CSG	MN8 Energy LLC	Holliston, MA	1 GWh	Jun 2015	Dec 2023	Solar
Holliston LLC	Greenbacker Renewable Energy Corporation	Holliston, MA	2 GWh	Sep 2020	Dec 2023	Solar
Boatlock	City of Holyoke Gas and Electric Dept.	Holyoke, MA	21 GWh	Dec 1920	Dec 2023	Water
Mt. Tom Solar Project Hybrid	Mt. Tom Solar, LLC	Holyoke, MA	5 GWh	Dec 2016	Dec 2023	Solar
Riverside Holyoke	City of Holyoke Gas and Electric Dept.	Holyoke, MA	40 GWh	Dec 1905	Dec 2023	Water
Hadley Falls	City of Holyoke Gas and Electric Dept.	Holyoke, MA	218 GWh	Dec 1951	Dec 2023	Water
Chemical	City of Holyoke Gas and Electric Dept.	Holyoke, MA	7 GWh	Dec 1934	Dec 2023	Water
Holyoke Solar Cooperative at Mueller	Holyoke Solar LLC	Holyoke, MA	4 GWh	Nov 2011	Dec 2023	Solar
Cabot Holyoke	City of Holyoke Gas and Electric Dept.	Holyoke, MA	6 GWh	Dec 1892	Dec 2023	Water
Hooksett	Central Rivers Power NH, LLC	Hooksett, NH	3 GWh	Jul 1927	Dec 2023	Water
Hopkinton CSG	Altus Power America Management, LLC	Hopkinton, MA	3 GWh	Mar 2019	Dec 2023	Solar
GD Hopkinton Main I, LLC	GD Hopkinton Main I, LLC	Hopkinton, RI	16 GWh	Oct 2020	Dec 2023	Solar
Corkwood Solar (CSG)	NextGrid Corkwood, LLC	Howland, ME	344 MWh	Oct 2023	Dec 2023	Solar
KS Solar Six LLC	Kearsarge Solar LLC	Hubbardston, MA	3 GWh	Nov 2013	Dec 2023	Solar
Williamsville Hybrid CSG	Williamsville Road LLC	Hubbardston, MA	7 GWh	Aug 2021	Dec 2023	Solar
Cherry Street	Town of Hudson - (MA)	Hudson, MA	417 MWh	Apr 1951	Dec 2023	Distillate Fuel Oil : 73.9% Natural Gas : 26.1%
Hudson	Captona Hudson LLC	Hudson, MA	6 GWh	Apr 2017	Dec 2023	Solar
Hull Wind II	Hull Municipal Light Plant	Hull, MA	3 GWh	Apr 2006	Apr 2023	Wind
Cream Street Solar	Cream Street Solar, LLC	Hyde Park, NY	4 GWh	Nov 2020	Dec 2023	Solar
W K Sanders	Village of Morrisville - (VT)	Hyde Park, VT	915 MWh	Jun 1983	Dec 2023	Water
Indian Orchard	Central Rivers Power MA, LLC	Indian Orchard, MA	11 GWh	Dec 1927	Dec 2023	Water
Masspower	Masspower	Indian Orchard, MA	609 GWh	Jun 1993	Dec 2023	Natural Gas
High Street Station	Town of Ipswich - (MA)	Ipswich, MA	28 MWh	May 1937	Dec 2023	Natural Gas : 75.8% Distillate Fuel Oil : 24.2%
Ipswich Wind Turbine	Town of Ipswich - (MA)	Ipswich, MA	3 GWh	Apr 2011	Dec 2023	Wind
Ball Mountain Hydro	Eagle Creek Renewable Energy, LLC	Jamaica, VT	2 GWh	Mar 2016	Nov 2023	Water
Androscoggin Mill	Pixelle Androscoggin LLC	Jay, ME	69 GWh	Dec 1963	Mar 2023	Natural Gas : 51.1% Black Liquor : 37.4% Wood/Wood Waste Solids : 11.6%
Androscoggin Energy Center	JGT2 Energy LLC	Jay, ME	82 GWh	Sep 1999	Dec 2023	Natural Gas : 96.1% Distillate Fuel Oil : 3.9%
International Paper Riley Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	6 GWh	Nov 1981	Dec 2023	Water
International Paper Jay Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	7 GWh	Dec 1911	Sep 2023	Water
Jewett City 1	Connecticut Mun Elec Engy Coop	Jewett City, CT	198 MWh	Jan 2010	Dec 2023	Distillate Fuel Oil
Johnston LFG Turbine Plant	Rhode Island LFG Genco	Johnston, RI	232 GWh	Apr 2013	Aug 2024	Landfill Gas
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	10 GWh	Jul 2005	Dec 2023	Landfill Gas
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	4 TWh	Sep 2002	Aug 2024	Natural Gas
Orbit Energy RI	Anaergia	Johnston, RI	4 GWh	Jun 2017	Dec 2022	Other Biomass Gas
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	6 GWh	Dec 2018	Aug 2024	Wind
WED Plainfield II, LLC	WED Plainfield II, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2023	Wind
WED Shun I, LLC	WED Shun I, LLC	Johnston, RI	6 GWh	Dec 2018	Aug 2024	Wind
WED Plainfield III, LLC	WED Plainfield III, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2023	Wind

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	894.0 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.0 TWh	85
#13	Duke Energy Carolinas	110.9 TWh	556
#17	Duke Energy Progress East	63.3 TWh	554
#51	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.2 TWh	20
#12	New York Independent System Operator	130.0 TWh	1,100
#1	PJM Interconnection, LLC	843.8 TWh	2,305
#31	South Carolina Public Service Authority	17.9 TWh	33
#60	Southeastern Power Administration	1.6 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	191.5 TWh	1,943
#9	Tennessee Valley Authority	157.5 TWh	170
#10	Florida Power & Light Co.	147.7 TWh	159
#12	New York Independent System Operator	130.0 TWh	1,100
#13	Duke Energy Carolinas	110.9 TWh	556
#15	ISO New England	102.8 TWh	1,487
#16	Bonneville Power Administration	80.0 TWh	158
#17	Duke Energy Progress East	63.3 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	59.0 TWh	45
#19	PacifiCorp East	52.6 TWh	204