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
Hampden Landfill Solar LLC	Hampden Landfill Solar LLC	Hampden, MA	2 GWh	Nov 2024	Dec 2025	Solar
Hampden Solar PV	NSTAR Electric Company	Hampden, MA	6 GWh	Oct 2019	Dec 2025	Solar
Hampden	Altus Power America Management, LLC	Hampden, MA	5 GWh	Jun 2015	Dec 2025	Solar
McHenry Solar	Ecos Energy LLC	Hampton, CT	2 GWh	Sep 2021	Dec 2025	Solar
Sydney Solar	Ecos Energy LLC	Hampton, CT	3 GWh	May 2020	Dec 2025	Solar
Dickinson Solar (CT)	Ecos Energy LLC	Hampton, CT	2 GWh	May 2020	Dec 2025	Solar
Hampton Facility	Foss Manufacturing Company LLC	Hampton, NH	28 GWh	Sep 1978	Jul 2026	Natural Gas
Carver Falls	Green Mountain Power Corp	Hampton, NY	4 GWh	Jan 1922	Dec 2025	Water
Nexamp Peak CSG	Nexamp Peak, LLC	Hancock, MA	2 GWh	Nov 2015	Dec 2025	Solar
Syncarpha Hancock I CSG	Syncarpha Hancock I, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2025	Solar
Syncarpha Hancock II CSG	Syncarpha Hancock II, LLC	Hancock, MA	3 GWh	Oct 2017	Dec 2025	Solar
Jiminy Peak Wind QF	Jiminy Peak Mountain Resort, LLC	Hancock, MA	2 MWh	Jul 2007	Apr 2025	Wind
Dartmouth College Heating Plant	Dartmouth College	Hanover, NH	10 GWh	Dec 1969	Jul 2026	Residual Fuel Oil
Hardwick-Athol & Eagle Hill	Madison Energy Investments LLC	Hardwick, MA	2 GWh	Jun 2015	Sep 2025	Solar
ER Center Road Solar, LLC	Altus Power America Management, LLC	Hardwick, VT	3 GWh	Apr 2022	Dec 2025	Solar
Billings Road	Altus Power America Management, LLC	Hardwick, VT	2 GWh	Oct 2021	Dec 2025	Solar
Harmony Solar (ME)	Maine DG Solar Harmony, LLC	Harmony, ME	9 GWh	Jul 2022	Dec 2025	Solar
Ocean State Power II	Ocean State Power II	Harrisville, RI	577 GWh	Sep 1991	Dec 2025	Natural Gas : 99.9%
Ocean State Power	Ocean State Power Co	Harrisville, RI	1 TWh	Nov 1990	Dec 2025	Natural Gas : 99.7%
Hartford Landfill Solar EGF	Materials Innovation Recycling Authority	Hartford, CT	1 GWh	May 2014	Dec 2024	Solar
Hartford Hospital Cogeneration	Cartier Energy, LLC	Hartford, CT	49 GWh	Jun 1988	Dec 2025	Natural Gas
Trinity College Fuel Cell	Onsite Partners, LLC	Hartford, CT	11 GWh	Jul 2018	Dec 2025	Natural Gas
HSCo CHP	Cartier Energy, LLC	Hartford, CT	28 GWh	Sep 2009	Dec 2025	Natural Gas
Enfield Solar One	Enfield Solar One, LLC	Hartford, CT	8 GWh	Mar 2024	Dec 2025	Solar
Wilder	Great River Hydro, LLC	Hartford, VT	134 GWh	Oct 1950	Dec 2025	Water
GMP Solar - Hartford	Green Mountain Power Corp	Hartford, VT	7 GWh	Nov 2016	Jul 2026	Solar
Hartland Solar	Madison Energy Holdings LLC	Hartland, ME	7 GWh	Nov 2021	Dec 2025	Solar
Harwich Landfill	Clean Focus Yield, LLC	Harwich, MA	6 GWh	Jul 2014	Dec 2025	Solar
Hatfield Solar PV	NSTAR Electric Company	Hatfield, MA	5 GWh	Nov 2018	Dec 2025	Solar
Hatfield Renewables Community Solar	Hatfield Renewables, LLC	Hatfield, MA	3 GWh	Aug 2017	Dec 2025	Solar
DG Haverhill CSG	DG Haverhill LLC	Haverhill, MA	7 GWh	Aug 2017	Dec 2025	Solar
Covanta Haverhill	Ogden Projects Inc-Haverhill	Haverhill, MA	291 GWh	Apr 1989	Jul 2026	Non-biogenic Municipal Solid Waste : 52.8% Biogenic Municipal Solid Waste : 43.2% Distillate Fuel Oil : 4.0%
Haverhill Solar Power Project	Massachusetts Electric Co	Haverhill, MA	1 GWh	Nov 2010	Dec 2025	Solar
Bradford Solar	Bradford Solar, LLC	Haverhill, MA	7 GWh	Mar 2017	Dec 2025	Solar
Kearsarge Haverhill	Kearsarge Haverhill LLC	Haverhill, MA	4 GWh	Feb 2021	Dec 2025	Solar
Williamsburg Solar LLC VNEM CSG	Tesla Inc.	Haydenville, MA	1 GWh	Jan 2016	Dec 2025	Solar
Highgate Falls	Village of Swanton - (VT)	Highgate, VT	32 GWh	Jul 1923	Dec 2025	Water
Hillsborough Hosiery	Silverstreet Hydro	Hillsboro, NH	2 GWh	Nov 1989	Dec 2025	Water
Jackman	Central Rivers Power NH, LLC	Hillsborough, NH	8 GWh	Jan 1926	Aug 2025	Water
VEC Magee Hill Solar	SoCore Energy LLC	Hinesburgh, VT	2 GWh	Oct 2017	Dec 2025	Solar
Hinsdale Solar PV	NSTAR Electric Company	Hinsdale, MA	3 GWh	Dec 2018	Dec 2025	Solar
Hiram	Brookfield White Pine Hydro LLC	Hiram, ME	31 GWh	Dec 1916	Dec 2025	Water
Bonny Eagle	Brookfield White Pine Hydro LLC	Hollis, ME	31 GWh	Dec 1909	Dec 2025	Water
Holliston Solar CSG	MN8 Energy LLC	Holliston, MA	1 GWh	Jun 2015	Dec 2025	Solar
Bourne (MA) - Holliston I	NVT LICENSES, LLC	Holliston, MA	3 GWh	Nov 2014	Dec 2025	Solar
Holliston LLC	Greenbacker Renewable Energy Corporation	Holliston, MA	2 GWh	Sep 2020	Dec 2025	Solar
Holyoke Solar Cooperative at Mueller	Holyoke Solar LLC	Holyoke, MA	4 GWh	Nov 2011	Dec 2025	Solar
Mt. Tom Solar Project Hybrid	Mt. Tom Solar, LLC	Holyoke, MA	4 GWh	Dec 2016	Dec 2025	Solar
Riverside Holyoke	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	22 GWh	Dec 1905	Dec 2025	Water
Hadley Falls	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	137 GWh	Dec 1951	Dec 2025	Water
Boatlock	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	12 GWh	Dec 1920	Dec 2025	Water
Cabot Holyoke	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	3 GWh	Dec 1892	Dec 2025	Water
Chemical	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	5 GWh	Dec 1934	Dec 2025	Water
Hooksett	Central Rivers Power NH, LLC	Hooksett, NH	6 GWh	Jul 1927	Dec 2025	Water
BWC Origination 19	BWC Origination 19 LLC	Hopedale, MA	2 GWh	Jul 2017	Dec 2025	Solar
Hopkinton CSG	Altus Power America Management, LLC	Hopkinton, MA	3 GWh	Mar 2019	Dec 2025	Solar
GD Hopkinton Main I, LLC	GD Hopkinton Main I, LLC	Hopkinton, RI	16 GWh	Oct 2020	Dec 2025	Solar
Corkwood Solar (CSG)	NextGrid Corkwood, LLC	Howland, ME	6 GWh	Oct 2023	Dec 2025	Solar
Williamsville Hybrid CSG	147 Williamsville Solar 1, LLC	Hubbardston, MA	8 GWh	Aug 2021	Dec 2025	Solar
KS Solar Six LLC	Kearsarge Solar LLC	Hubbardston, MA	3 GWh	Nov 2013	Dec 2025	Solar
Cherry Street	Town of Hudson - (MA)	Hudson, MA	320 MWh	Apr 1951	Dec 2025	Distillate Fuel Oil : 58.5% Natural Gas : 41.5%
Hudson	Captona Hudson LLC	Hudson, MA	5 GWh	Apr 2017	Dec 2025	Solar
Cream Street Solar	Cream Street Solar, LLC	Hyde Park, NY	4 GWh	Nov 2020	Dec 2025	Solar
W K Sanders	Village of Morrisville - (VT)	Hyde Park, VT	716 MWh	Jun 1983	Nov 2025	Water
Indian Orchard	Central Rivers Power MA, LLC	Indian Orchard, MA	3 GWh	Dec 1927	Dec 2025	Water
Masspower	Masspower	Indian Orchard, MA	442 GWh	Jun 1993	Dec 2025	Natural Gas
Ipswich Wind Turbine	Town of Ipswich - (MA)	Ipswich, MA	2 GWh	Apr 2011	Dec 2025	Wind
High Street Station	Town of Ipswich - (MA)	Ipswich, MA	153 MWh	May 1937	Dec 2025	Natural Gas : 92.3% Distillate Fuel Oil : 7.7%
Ball Mountain Hydro	Eagle Creek Renewable Energy, LLC	Jamaica, VT	995 MWh	Mar 2016	Dec 2025	Water
International Paper Riley Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	20 GWh	Nov 1981	Dec 2025	Water
International Paper Jay Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	12 GWh	Dec 1911	Dec 2025	Water
Jericho Gravel Solar Farm	SoCore Energy LLC	Jerico, VT	2 GWh	Dec 2020	Dec 2025	Solar
Jericho Landfill Solar Farm	SoCore Energy LLC	Jerico, VT	1 GWh	Dec 2020	Dec 2025	Solar
Jewett City 1	Connecticut Mun Elec Engy Coop	Jewett City, CT	139 MWh	Jan 2010	Dec 2025	Distillate Fuel Oil
WED Plainfield, LLC	WED Plainfield, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	6 GWh	Dec 2018	Jun 2026	Wind
WED Plainfield II, LLC	WED Plainfield II, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	3 TWh	Sep 2002	Jul 2026	Natural Gas
WED Shun III, LLC	WED Shun III, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
WED Shun II, LLC	WED Shun II, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
Johnston LFG Turbine Plant	Rhode Island LFG Genco	Johnston, RI	170 GWh	Apr 2013	Jul 2026	Landfill Gas
WED Shun I, LLC	WED Shun I, LLC	Johnston, RI	7 GWh	Dec 2018	Jun 2026	Wind
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	4 GWh	Jul 2005	Dec 2025	Landfill Gas
Orbit Energy RI	Anaergia	Johnston, RI	144 MWh	Jun 2017	Dec 2024	Other Biomass Gas
WED Plainfield III, LLC	WED Plainfield III, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
Plainfield Pike	Captona Plainfield Pike Johnston LLC	Johnston, RI	4 GWh	May 2019	Dec 2025	Solar
A Street 1	Captona A Street 1 Johnston LLC	Johnston, RI	2 GWh	Nov 2018	Dec 2025	Solar
A Street 2	Captona A Street 2 Johnston LLC	Johnston, RI	3 GWh	Nov 2018	Dec 2025	Solar
Pine Hill	Onsite Partners, LLC	Johnston, RI	8 GWh	Jul 2020	Dec 2025	Solar
NE Renewable Power Jonesboro	Stored Solar J&WE	Jonesboro, ME	16 MWh	Nov 1987	Jun 2025	Gaseous Propane : 66.7% Wood/Wood Waste Solids : 33.3%
Raboth - Marion Drive	Madison Energy Holdings LLC	Kingston, MA	4 GWh	Feb 2021	Dec 2025	Solar
Lakeville Solar	C2 MA Lakeville, LLC	Lakeville, MA	3 GWh	Nov 2018	Dec 2025	Solar
Amaterasu LLC	AES Distributed Energy	Lancaster, MA	7 GWh	May 2021	Dec 2025	Solar
Nationwide	Nationwide Solar Energy LLC	Lancaster, MA	5 GWh	May 2021	Dec 2025	Solar
Brockelman Road Solar 2	Brockelman Road Solar 2, LLC	Lancaster, MA	2 GWh	Jul 2021	Dec 2025	Solar
ZPD-PT Solar Project 2017-038 Hybrid LLC	AES Distributed Energy	Lancaster, MA	8 GWh	Mar 2021	Dec 2025	Solar
Brockelman	Integrys MA Solar, LLC	Lancaster, MA	5 GWh	Oct 2013	Dec 2025	Solar
EDF Lancaster	CleanCapital Holdings	Lancaster, MA	5 GWh	Jun 2014	Dec 2025	Solar
Berkshire Wind Power Project	Massachusetts Mun Wholes Electric Co	Lanesboro, MA	28 GWh	Apr 2011	Jul 2026	Wind
Saddleback Solar	SoCore Energy LLC	Lanesborough, MA	4 GWh	Aug 2022	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