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	Dec 2025
Annual Generation	105.8 TWh
Power Plants	1,577
Utilities	819
Ranked #15 out of 65 in terms of net annual generation
Ranked #12 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 55.8% Nuclear \| 25.9% Water \| 5% Other Fuel \| 4.4% Wind \| 4% Solar \| 1.5% Coal \| 0.3%

Map of ISO New England

Register Now for Comprehensive Access

Subscribe now to access all power plant data, utility information, FERC EQR data, and more for ISO New England.

Create Your Account Today

Daily Net Generation for ISO New England for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
MacKinnon Solar	Ecos Energy LLC	Rutland, VT	3 GWh	Jul 2021	Dec 2024	Solar
Park Solar	Ecos Energy LLC	Woodbridge, CT	866 MWh	Nov 2023	Dec 2024	Solar
Barrow Solar	Ecos Energy LLC	Somers, CT	3 GWh	May 2021	Dec 2024	Solar
Electric Avenue Lunenburg Solar 1	Electric Avenue Lunenburg Solar 1, LLC	Lunenburg, MA	3 GWh	Nov 2021	Dec 2024	Solar
Elizabeth Mines Solar 1	Elizabeth Mines Solar 1, LLC	So. Strafford, VT	7 GWh	Oct 2017	Dec 2024	Solar
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	55 GWh	Aug 2006	Sep 2025	Landfill Gas : 73.7% Natural Gas : 25.4% Distillate Fuel Oil : 0.9%
Emerald Gardens PKI, LLC	Emerald Gardens PKI, LLC	Shelton, CT	2 GWh	Sep 2021	Dec 2024	Solar
Emerald Marshfields, LLC	Emerald Marshfield, LLC	Marshfield, MA	2 GWh	Nov 2022	Dec 2024	Solar
Enfield Solar One	Enfield Solar One, LLC	Hartford, CT	5 GWh	Mar 2024	Dec 2024	Solar
ENGIE 2019 ProjectCo-MA1, LLC	ENGIE 2019 ProjectCo MA-1, LLC	Agawam, MA	6 GWh	Feb 2021	Dec 2024	Solar
Waterbury Generation	Engie North America	Waterbury, CT	44 GWh	May 2009	Dec 2024	Natural Gas : 99.8%
Errol Hydroelectric Project	Errol Hydroelectric Co LLC	Errol, NH	15 GWh	Oct 1986	Dec 2024	Water
Erving Paper Mills	Erving Paper Mills Inc	Erving, MA	42 GWh	Nov 2013	Sep 2025	Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
Erving CSG	Erving Poplar Mountain Solar 1, LLC	Erving, MA	1 GWh	Aug 2020	Dec 2024	Solar
Whitcomb Solar Farm	ERWR Whitcomb Farm Solar LLC	Essex Junction, VT	3 GWh	Sep 2014	Dec 2024	Solar
Newington Energy Center	Essential Power Operating Services, LLC	Newington, NH	2 TWh	Sep 2002	Sep 2025	Natural Gas : 95.7% Distillate Fuel Oil : 4.3%
Benton Falls Associates	Essex Hydro Associates LLC	Benton, ME	4 GWh	Nov 1987	Dec 2024	Water
Millbury Solar	Evergreen Wind, LLC	Millbury, MA	4 GWh	Mar 2014	Dec 2024	Solar
Mass Midstate Solar 1	Evergreen Wind, LLC	Warren, MA	7 GWh	Apr 2014	Dec 2024	Solar
Mass Midstate Solar 2	Evergreen Wind, LLC	Warren, MA	7 GWh	Apr 2014	Dec 2024	Solar
Mass Midstate Solar 3	Evergreen Wind, LLC	Warren, MA	6 GWh	Apr 2014	Dec 2024	Solar
Bull Hill Wind Project	Evergreen Wind, LLC	Eastbrook, ME	74 GWh	Sep 2012	Dec 2024	Wind
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	73 GWh	Sep 2011	Sep 2025	Wind
Stetson Wind II	Evergreen Wind, LLC	Danforth, ME	50 GWh	Feb 2010	Dec 2024	Wind
Rollins Wind Project	Evergreen Wind, LLC	Winn Village, ME	136 GWh	Jun 2011	Dec 2024	Wind
Stetson Wind I	Evergreen Wind, LLC	Danforth, ME	121 GWh	Dec 2008	Dec 2024	Wind
Sheldon Solar	Excelsior Energy Capital	Sheldon Springs, VT	3 GWh	Aug 2013	Dec 2024	Solar
Fairfield University CHP Plant	Fairfield University	Fairfield, CT	26 GWh	Sep 2007	Dec 2024	Natural Gas
Fairhaven E	Fairhaven MA 1, LLC	Fairhaven, MA	3 GWh	Jul 2021	Dec 2024	Solar
Fairhaven Wind	Fairhaven Wind LLC	Fairhaven, MA	4 GWh	Mar 2012	Dec 2024	Wind
Farley Road Community Solar	Farley Road Solar, LLC	Dudley, MA	2 GWh	Jul 2017	Dec 2024	Solar
Rainbow (CT)	Farmington River Power Company	Windsor, CT	20 GWh	Nov 1925	Sep 2025	Water
Farmington Solar	Farmington Solar, LLC	Farmington, ME	129 GWh	Sep 2021	Sep 2025	Solar
Faunce Corner Community Solar	Faunce Corner Road Dartmouth Solar 1, LLC	Dartmouth, MA	2 GWh	Jun 2022	Dec 2024	Solar
Federal Road Solar 1, LLC CSG	Federal Road Solar 1, LLC	South Carver, MA	8 GWh	Nov 2015	Dec 2024	Solar
Bulls Bridge	FirstLight Power Resources Services LLC	New Milford, CT	31 GWh	Dec 1902	Dec 2024	Water
Scotland Dam	FirstLight Power Resources Services LLC	Windham, CT	7 GWh	Dec 1936	Dec 2024	Water
Shepaug	FirstLight Power Resources Services LLC	Southbury, CT	117 GWh	Dec 1954	Dec 2024	Water
Stevenson	FirstLight Power Resources Services LLC	Monroe, CT	96 GWh	Dec 1918	Dec 2024	Water
Falls Village	FirstLight Power Resources Services LLC	Falls Village, CT	30 GWh	Dec 1913	Dec 2024	Water
Taftville	FirstLight Power Resources Services LLC	Taftville, CT	3 GWh	Dec 1905	Dec 2024	Water
Tunnel	FirstLight Power Resources Services LLC	Preston, CT	8 GWh	Dec 1918	Dec 2024	Water
NFM Solar Power LLC	FirstLight Power Resources, Inc. - MA	Northfield, MA	2 GWh	Feb 2012	Dec 2024	Solar
Cabot	FirstLight Power Resources, Inc. - MA	Montague, MA	304 GWh	Dec 1914	Dec 2024	Water
Turners Falls	FirstLight Power Resources, Inc. - MA	Montague, MA	12 GWh	Dec 1904	Dec 2024	Water
Fisher Road Solar	Fisher Road Solar I, LLC	Dartmouth, MA	8 GWh	Apr 2015	Dec 2024	Solar
Fitchburg Renewables	Fitchburg Renewables, LLC	Fitchburg, MA	6 GWh	Feb 2020	Dec 2024	Solar
Hampton Facility	Foss Manufacturing Company LLC	Hampton, NH	24 GWh	Sep 1978	Sep 2025	Natural Gas
Foster Solar	Foster Solar, LLC	North Scituate, RI	2 GWh	Jul 2016	Dec 2024	Solar
Fox Island Wind LLC	Fox Island Wind LLC	Vinalhaven, ME	8 GWh	Oct 2009	Dec 2024	Wind
Foxwoods CoGen	Foxwoods Resort Casino	Mashantucket, CT	11 GWh	May 2010	Dec 2024	Natural Gas
Cape Gas Turbine	FPL Energy Cape LLC	Portland, ME	111 MWh	Dec 1969	Dec 2024	Distillate Fuel Oil
William F Wyman Hybrid	FPL Energy Wyman LLC	Yarmouth, ME	66 GWh	Dec 1956	Sep 2025	Residual Fuel Oil : 99.2% Distillate Fuel Oil : 0.8%
Framingham State University Plant	Framingham State University	Framingham, MA	41 MWh	May 1974	Sep 2025	Solar : 78.0% Distillate Fuel Oil : 22.0%
CVEC Round 4 Brewster Captn Golf Course	Freemans Way Solar Project 2019, LLC	Brewster, MA	1 GWh	Feb 2022	Dec 2024	Solar
French King Solar LLC	French King Solar LLC	Erving, MA	8 GWh	Oct 2022	Dec 2024	Solar
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	24 GWh	Feb 2009	Sep 2025	Natural Gas
Fusion Solar Center LLC	Fusion Solar Centre, L.L.C	Baltic, CT	40 GWh	Feb 2018	Sep 2025	Solar
Gardner Solar 1	Gardner Solar 1, LLC	Gardner, MA	3 GWh	Apr 2014	Dec 2024	Solar
GD Glocester White Oak I, LLC	GD Glocester White Oak I, LLC	Glocester, RI	3 GWh	Nov 2020	Dec 2024	Solar
GD Hopkinton Main I, LLC	GD Hopkinton Main I, LLC	Hopkinton, RI	16 GWh	Oct 2020	Dec 2024	Solar
GD Johnson Scituate I, LLC	GD Johnson Scituate I, LLC	Cranston, RI	6 GWh	Nov 2021	Dec 2024	Solar
GD Richmond Buttonwoods I, LLC	GD Richmond Buttonwoods I, LLC	Richmond, RI	2 GWh	Nov 2019	Dec 2024	Solar
GD West Greenwich Nooseneck I, LLC	GD West Greenwich Nooseneck I, LLC	West Greenwich, RI	33 GWh	Nov 2022	Dec 2024	Solar
GD West Greenwich Victory I, LLC	GD West Greenwich Victory I, LLC	West Greenwich, RI	3 GWh	Nov 2019	Dec 2024	Solar
GDIM 1, LLC	GDIM 1, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2024	Solar
GDIM 2, LLC	GDIM 2, LLC	North Smithfield, RI	13 GWh	Nov 2021	Dec 2024	Solar
GDIM 3, LLC	GDIM 3, LLC	North Smithfield, RI	15 GWh	Nov 2021	Dec 2024	Solar
GDIM 4, LLC	GDIM 4, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2024	Solar
GenConn Devon LLC	GenConn Devon LLC	Milford, CT	4 GWh	May 2010	Dec 2024	Kerosene : 90.3% Natural Gas : 9.7%
GenConn Middletown LLC	GenConn Middletown LLC	Middletown, CT	6 GWh	May 2011	Dec 2024	Kerosene : 57.4% Natural Gas : 42.6%
General Electric Aircraft Engines	General Electric Aircraft Engines	Lynn, MA	2 GWh	Dec 1947	Sep 2025	Solar
Generate Colchester Fuel Cells, LLC	Generate Colchester Fuel Cells, LLC	Colchester, CT	77 GWh	Sep 2021	Dec 2024	Natural Gas
New Haven Harbor	Generation Bridge II Connecticut, LLC	New Haven, CT	93 GWh	Jun 1975	Sep 2025	Natural Gas : 72.8% Residual Fuel Oil : 17.4% Distillate Fuel Oil : 6.4% Kerosene : 3.3%
Bridgeport Station	Generation Bridge II Connecticut, LLC	Bridgeport, CT	4 TWh	Jul 1961	Sep 2025	Natural Gas : 98.6% Distillate Fuel Oil : 1.4%
Golden Hills Solar	Golden Hills Solar, LLC	Rutland, MA	8 GWh	Aug 2017	Dec 2024	Solar
Granby Solar, LLC CSG	Granby Solar, LLC	Granby, MA	6 GWh	Jun 2021	Dec 2024	Solar
Granite Ridge	Granite Ridge Energy LLC	Londonderry, NH	3 TWh	Feb 2003	Sep 2025	Natural Gas
Newington	Granite Shore Power	Newington, NH	95 GWh	May 1974	Aug 2025	Natural Gas : 60.0% Residual Fuel Oil : 39.5% Distillate Fuel Oil : 0.6%
Lost Nation	Granite Shore Power	Groveton, NH	422 MWh	Aug 1969	Dec 2024	Distillate Fuel Oil
White Lake	Granite Shore Power	Tamworth, NH	484 MWh	Jun 1968	Dec 2024	Jet Fuel
Merrimack	Granite Shore Power	Bow, NH	364 GWh	Nov 1960	Sep 2025	Bituminous Coal : 99.7%
Schiller	Granite Shore Power	Portsmouth, NH	590 MWh	Sep 1952	Sep 2025	Jet Fuel
Gravel Pit Solar, LLC	Gravel Pit Solar, LLC	East Windsor, CT	113 GWh	-	Sep 2025	Solar
Newport	Great Bay Hydro Corp	Newport, VT	21 GWh	Dec 1935	Dec 2024	Water
Great Lakes Hydro America - ME	Great Lakes Hydro America LLC	Millinocket, ME	571 GWh	Jun 1917	Dec 2024	Water
Berlin Gorham	Great Lakes Hydro America LLC	Berlin, NH	133 GWh	Dec 1913	Dec 2024	Water
Deerfield 4	Great River Hydro, LLC	Buckland, MA	20 GWh	Jul 1912	Dec 2024	Water
Deerfield 3	Great River Hydro, LLC	Buckland, MA	25 GWh	Jul 1912	Dec 2024	Water
Bellows Falls	Great River Hydro, LLC	Bellow Falls, VT	264 GWh	Feb 1928	Dec 2024	Water
Mcindoes	Great River Hydro, LLC	Barnet, VT	53 GWh	Dec 1930	Dec 2024	Water
Searsburg	Great River Hydro, LLC	Searsburg, VT	15 GWh	Feb 1922	Dec 2024	Water
Deerfield 5	Great River Hydro, LLC	Florida, MA	42 GWh	Sep 1974	Dec 2024	Water
Deerfield 2	Great River Hydro, LLC	Conway, MA	29 GWh	Jul 1913	Dec 2024	Water
Sherman	Great River Hydro, LLC	Rowe, MA	27 GWh	Nov 1926	Dec 2024	Water
Harriman	Great River Hydro, LLC	Whitingham, VT	91 GWh	Apr 1924	Dec 2024	Water
Comerford	Great River Hydro, LLC	Monroe, NH	400 GWh	Aug 1930	Dec 2024	Water
S C Moore	Great River Hydro, LLC	Littleton, NH	341 GWh	Dec 1956	Dec 2024	Water
Vernon Dam	Great River Hydro, LLC	Vernon, VT	160 GWh	Jul 1909	Dec 2024	Water
Wilder	Great River Hydro, LLC	Hartford, VT	179 GWh	Oct 1950	Dec 2024	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	689.8 GWh	4
#25	Dominion Energy South Carolina, Inc.	25.5 TWh	87
#13	Duke Energy Carolinas	112.3 TWh	565
#17	Duke Energy Progress East	64.4 TWh	559
#52	Duke Energy Progress West	4.3 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.4 TWh	25
#12	New York Independent System Operator	131.9 TWh	1,211
#1	PJM Interconnection, LLC	871.2 TWh	2,465
#30	South Carolina Public Service Authority	18.8 TWh	34
#59	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	188.2 TWh	2,075
#9	Tennessee Valley Authority	161.7 TWh	204
#10	Florida Power & Light Co.	149.1 TWh	187
#12	New York Independent System Operator	131.9 TWh	1,211
#13	Duke Energy Carolinas	112.3 TWh	565
#15	ISO New England	105.8 TWh	1,577
#16	Bonneville Power Administration	80.6 TWh	163
#17	Duke Energy Progress East	64.4 TWh	559
#18	PacifiCorp East	61.1 TWh	216
#19	Salt River Project Agricultural Improvement and Power District	59.9 TWh	48