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	Jul 2026
Annual Generation	111.1 TWh
Power Plants	1,629
Utilities	833
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 \| 54.9% Nuclear \| 25% Wind \| 5.1% Water \| 4.5% Other Fuel \| 4.4% Solar \| 1.6% Coal \| 0.1%

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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
Blair Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2025	Solar
Madison Solar (CT)	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2025	Solar
Electric Avenue Lunenburg Solar 1	Electric Avenue Lunenburg Solar 1, LLC	Lunenburg, MA	2 GWh	Nov 2021	Dec 2025	Solar
Elizabeth Mines Solar 1	Elizabeth Mines Solar 1, LLC	So. Strafford, VT	7 GWh	Oct 2017	Dec 2025	Solar
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	53 GWh	Aug 2006	May 2026	Landfill Gas : 55.5% Natural Gas : 42.0% Distillate Fuel Oil : 2.5%
Emerald Gardens PKI, LLC	Emerald Gardens PKI, LLC	Shelton, CT	2 GWh	Sep 2021	Dec 2025	Solar
Emerald Marshfields, LLC	Emerald Marshfield, LLC	Marshfield, MA	2 GWh	Nov 2022	Dec 2025	Solar
Enfield Solar One	Enfield Solar One, LLC	Hartford, CT	8 GWh	Mar 2024	Dec 2025	Solar
ENGIE 2019 ProjectCo-MA1, LLC	ENGIE 2019 ProjectCo MA-1, LLC	Agawam, MA	5 GWh	Feb 2021	Jul 2025	Solar
Waterbury Generation	Engie North America	Waterbury, CT	55 GWh	May 2009	Dec 2025	Natural Gas : 99.1% Kerosene : 0.9%
Errol Hydroelectric Project	Errol Hydroelectric Co LLC	Errol, NH	14 GWh	Oct 1986	Dec 2025	Water
Erving Paper Mills	Erving Paper Mills Inc	Erving, MA	42 GWh	Nov 2013	May 2026	Natural Gas : 98.0% Distillate Fuel Oil : 2.0%
Erving CSG	Erving Poplar Mountain Solar 1, LLC	Erving, MA	1 GWh	Aug 2020	Dec 2025	Solar
Whitcomb Solar Farm	ERWR Whitcomb Farm Solar LLC	Essex Junction, VT	3 GWh	Sep 2014	Dec 2025	Solar
Newington Energy Center	Essential Power Operating Services, LLC	Newington, NH	2 TWh	Sep 2002	May 2026	Natural Gas : 92.8% Distillate Fuel Oil : 7.2%
Benton Falls Associates	Essex Hydro Associates LLC	Benton, ME	10 GWh	Nov 1987	Dec 2025	Water
Stetson Wind II	Evergreen Wind, LLC	Danforth, ME	55 GWh	Feb 2010	Dec 2025	Wind
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	57 GWh	Sep 2011	May 2026	Wind
Bull Hill Wind Project	Evergreen Wind, LLC	Eastbrook, ME	66 GWh	Sep 2012	Dec 2025	Wind
Millbury Solar	Evergreen Wind, LLC	Millbury, MA	5 GWh	Mar 2014	Dec 2025	Solar
Mass Midstate Solar 1	Evergreen Wind, LLC	Warren, MA	7 GWh	Apr 2014	Dec 2025	Solar
Mass Midstate Solar 2	Evergreen Wind, LLC	Warren, MA	7 GWh	Apr 2014	Dec 2025	Solar
Mass Midstate Solar 3	Evergreen Wind, LLC	Warren, MA	6 GWh	Apr 2014	Dec 2025	Solar
Rollins Wind Project	Evergreen Wind, LLC	Winn Village, ME	147 GWh	Jun 2011	Dec 2025	Wind
Stetson Wind I	Evergreen Wind, LLC	Danforth, ME	146 GWh	Dec 2008	Dec 2025	Wind
Sheldon Solar	Excelsior Energy Capital	Sheldon Springs, VT	2 GWh	Aug 2013	Dec 2025	Solar
Fairfield University CHP Plant	Fairfield University	Fairfield, CT	23 GWh	Sep 2007	Dec 2025	Natural Gas
Fairhaven Wind	Fairhaven Wind LLC	Fairhaven, MA	3 GWh	Mar 2012	Dec 2025	Wind
Farley Road Community Solar	Farley Road Solar, LLC	Dudley, MA	2 GWh	Jul 2017	Dec 2025	Solar
Rainbow (CT)	Farmington River Power Company	Windsor, CT	22 GWh	Nov 1925	May 2026	Water
Farmington Solar	Farmington Solar, LLC	Farmington, ME	125 GWh	Sep 2021	May 2026	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 2025	Solar
Tunnel	FirstLight Power Resources Services LLC	Preston, CT	6 GWh	Dec 1918	Dec 2025	Water
Falls Village	FirstLight Power Resources Services LLC	Falls Village, CT	26 GWh	Dec 1913	Dec 2025	Water
Stevenson	FirstLight Power Resources Services LLC	Monroe, CT	71 GWh	Dec 1918	Dec 2025	Water
Shepaug	FirstLight Power Resources Services LLC	Southbury, CT	93 GWh	Dec 1954	Dec 2025	Water
Scotland Dam	FirstLight Power Resources Services LLC	Windham, CT	4 GWh	Dec 1936	Dec 2025	Water
Taftville	FirstLight Power Resources Services LLC	Taftville, CT	2 GWh	Dec 1905	Dec 2025	Water
Bulls Bridge	FirstLight Power Resources Services LLC	New Milford, CT	27 GWh	Dec 1902	Dec 2025	Water
Turners Falls	FirstLight Power Resources, Inc. - MA	Montague, MA	12 GWh	Dec 1904	Dec 2025	Water
NFM Solar Power LLC	FirstLight Power Resources, Inc. - MA	Northfield, MA	2 GWh	Feb 2012	Dec 2025	Solar
Cabot	FirstLight Power Resources, Inc. - MA	Montague, MA	239 GWh	Dec 1914	Dec 2025	Water
Fisher Road Solar	Fisher Road Solar I, LLC	Dartmouth, MA	7 GWh	Apr 2015	Dec 2025	Solar
Fitchburg Renewables	Fitchburg Renewables, LLC	Fitchburg, MA	6 GWh	Feb 2020	Dec 2025	Solar
Hampton Facility	Foss Manufacturing Company LLC	Hampton, NH	28 GWh	Sep 1978	May 2026	Natural Gas
Foster Solar	Foster Solar, LLC	North Scituate, RI	2 GWh	Jul 2016	Dec 2025	Solar
Fox Island Wind LLC	Fox Island Wind LLC	Vinalhaven, ME	9 GWh	Oct 2009	Dec 2025	Wind
Foxwoods CoGen	Foxwoods Resort Casino	Mashantucket, CT	11 GWh	May 2010	Dec 2025	Natural Gas
Cape Gas Turbine	FPL Energy Cape LLC	Portland, ME	752 MWh	Dec 1969	Dec 2025	Distillate Fuel Oil
William F Wyman Hybrid	FPL Energy Wyman LLC	Yarmouth, ME	339 GWh	Dec 1956	May 2026	Residual Fuel Oil : 99.6%
Framingham State University Plant	Framingham State University	Framingham, MA	38 MWh	May 1974	May 2026	Solar : 63.2% Distillate Fuel Oil : 36.8%
CVEC Round 4 Brewster Captn Golf Course	Freemans Way Solar Project 2019, LLC	Brewster, MA	1 GWh	Feb 2022	Dec 2025	Solar
French King Solar LLC	French King Solar LLC	Erving, MA	8 GWh	Oct 2022	Dec 2025	Solar
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	25 GWh	Feb 2009	May 2026	Natural Gas
Fusion Solar Center LLC	Fusion Solar Centre, L.L.C	Baltic, CT	38 GWh	Feb 2018	May 2026	Solar
Gardner Solar 1	Gardner Solar 1, LLC	Gardner, MA	3 GWh	Apr 2014	Dec 2025	Solar
GD Glocester White Oak I, LLC	GD Glocester White Oak I, LLC	Glocester, RI	3 GWh	Nov 2020	Dec 2025	Solar
GD Hopkinton Main I, LLC	GD Hopkinton Main I, LLC	Hopkinton, RI	16 GWh	Oct 2020	Dec 2025	Solar
GD Johnson Scituate I, LLC	GD Johnson Scituate I, LLC	Cranston, RI	6 GWh	Nov 2021	Dec 2025	Solar
GD Richmond Beaver River I LLC	GD Richmond Beaver River I LLC	Richmond, RI	6 GWh	Mar 2025	Dec 2025	Solar
GD West Greenwich Nooseneck I, LLC	GD West Greenwich Nooseneck I, LLC	West Greenwich, RI	31 GWh	Nov 2022	Dec 2025	Solar
GDIM 1, LLC	GDIM 1, LLC	North Smithfield, RI	15 GWh	Nov 2021	Dec 2025	Solar
GDIM 2, LLC	GDIM 2, LLC	North Smithfield, RI	13 GWh	Nov 2021	Dec 2025	Solar
GDIM 3, LLC	GDIM 3, LLC	North Smithfield, RI	15 GWh	Nov 2021	Dec 2025	Solar
GDIM 4, LLC	GDIM 4, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2025	Solar
GenConn Devon LLC	GenConn Devon LLC	Milford, CT	15 GWh	May 2010	Dec 2025	Kerosene : 75.4% Natural Gas : 24.6%
GenConn Middletown LLC	GenConn Middletown LLC	Middletown, CT	6 GWh	May 2011	Dec 2025	Kerosene : 77.4% Natural Gas : 22.6%
General Electric Aircraft Engines	General Electric Aircraft Engines	Lynn, MA	2 GWh	Dec 1947	May 2026	Solar
Generate Colchester Fuel Cells, LLC	Generate Colchester Fuel Cells, LLC	Colchester, CT	72 GWh	Sep 2021	Dec 2025	Natural Gas
New Haven Steam	Generation Bridge II Connecticut, LLC	New Haven, CT	167 GWh	Jun 1975	Jan 2026	Residual Fuel Oil : 45.1% Natural Gas : 40.3% Distillate Fuel Oil : 12.2% Kerosene : 2.5%
Bridgeport Station	Generation Bridge II Connecticut, LLC	Bridgeport, CT	3 TWh	Jul 1961	May 2026	Natural Gas : 84.6% Distillate Fuel Oil : 15.4%
Golden Hills Solar	Golden Hills Solar, LLC	Rutland, MA	7 GWh	Aug 2017	Dec 2025	Solar
Granby Solar, LLC CSG	Granby Solar, LLC	Granby, MA	6 GWh	Jun 2021	Dec 2025	Solar
Granite Ridge	Granite Ridge Energy LLC	Londonderry, NH	4 TWh	Feb 2003	May 2026	Natural Gas
Newington	Granite Shore Power	Newington, NH	157 GWh	May 1974	Apr 2026	Residual Fuel Oil : 64.1% Natural Gas : 34.5% Distillate Fuel Oil : 1.4%
White Lake	Granite Shore Power	Tamworth, NH	484 MWh	Jun 1968	Dec 2024	Jet Fuel
Schiller	Granite Shore Power	Portsmouth, NH	888 MWh	Sep 1952	May 2026	Jet Fuel
Merrimack	Granite Shore Power	Bow, NH	116 GWh	Nov 1960	May 2026	Bituminous Coal : 97.6% Jet Fuel : 2.3%
Lost Nation	Granite Shore Power	Groveton, NH	422 MWh	Aug 1969	Dec 2024	Distillate Fuel Oil
Gravel Pit Solar, LLC	Gravel Pit Solar, LLC	East Windsor, CT	187 GWh	Jan 2025	May 2026	Solar
Newport	Great Bay Hydro Corp	Newport, VT	13 GWh	Dec 1935	Dec 2025	Water
Berlin Gorham	Great Lakes Hydro America LLC	Berlin, NH	101 GWh	Dec 1913	Dec 2025	Water
Great Lakes Hydro America - ME	Great Lakes Hydro America LLC	Millinocket, ME	500 GWh	Jun 1917	Dec 2025	Water
Deerfield 5	Great River Hydro, LLC	Florida, MA	44 GWh	Sep 1974	Dec 2025	Water
Wilder	Great River Hydro, LLC	Hartford, VT	134 GWh	Oct 1950	Dec 2025	Water
Vernon Dam	Great River Hydro, LLC	Vernon, VT	119 GWh	Jul 1909	Dec 2025	Water
S C Moore	Great River Hydro, LLC	Littleton, NH	255 GWh	Dec 1956	Dec 2025	Water
Comerford	Great River Hydro, LLC	Monroe, NH	297 GWh	Aug 1930	Dec 2025	Water
Mcindoes	Great River Hydro, LLC	Barnet, VT	39 GWh	Dec 1930	Dec 2025	Water
Bellows Falls	Great River Hydro, LLC	Bellow Falls, VT	194 GWh	Feb 1928	Dec 2025	Water
Harriman	Great River Hydro, LLC	Whitingham, VT	98 GWh	Apr 1924	Dec 2025	Water
Sherman	Great River Hydro, LLC	Rowe, MA	28 GWh	Nov 1926	Dec 2025	Water
Deerfield 2	Great River Hydro, LLC	Conway, MA	29 GWh	Jul 1913	Dec 2025	Water
Deerfield 3	Great River Hydro, LLC	Buckland, MA	26 GWh	Jul 1912	Dec 2025	Water
Deerfield 4	Great River Hydro, LLC	Buckland, MA	21 GWh	Jul 1912	Dec 2025	Water
Searsburg	Great River Hydro, LLC	Searsburg, VT	16 GWh	Feb 1922	Dec 2025	Water
ME-EDFR-Phase I-Woolwich	Green Mile Solar, LLC	Woolwich, ME	8 GWh	Aug 2023	Dec 2025	Solar
GMP Solar - Panton Hybrid	Green Mountain Power Corp	Panton, VT	8 GWh	Nov 2016	May 2026	Solar
GMP Solar/Storage-Ferrisburgh Hybrid	Green Mountain Power Corp	Ferrisburgh, VT	8 GWh	Aug 2019	May 2026	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	442.5 GWh	4
#24	Dominion Energy South Carolina, Inc.	25.3 TWh	83
#13	Duke Energy Carolinas	112.6 TWh	577
#17	Duke Energy Progress East	64.5 TWh	565
#50	Duke Energy Progress West	4.5 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	33.9 TWh	25
#12	New York Independent System Operator	134.3 TWh	1,299
#1	PJM Interconnection, LLC	882.8 TWh	2,652
#31	South Carolina Public Service Authority	18.5 TWh	35
#59	Southeastern Power Administration	1.3 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	169.4 TWh	2,135
#9	Tennessee Valley Authority	163.4 TWh	207
#10	Florida Power & Light Co.	152.2 TWh	187
#12	New York Independent System Operator	134.3 TWh	1,299
#13	Duke Energy Carolinas	112.6 TWh	577
#15	ISO New England	111.1 TWh	1,629
#16	Bonneville Power Administration	91.6 TWh	167
#17	Duke Energy Progress East	64.5 TWh	565
#18	PacifiCorp East	60.9 TWh	222
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	49