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 2025
Annual Generation	105.5 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 \| 26% Water \| 5% Other Fuel \| 4.4% Wind \| 4% Solar \| 1.5% Coal \| 0.4%

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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
West Brookfield Solar, LLC	CVI CleanCapital Solar 7	West Brookfield, MA	2 GWh	Dec 2015	Dec 2024	Solar
West Buxton	Brookfield White Pine Hydro LLC	Buxton, ME	20 GWh	Dec 1903	Dec 2024	Water
West Charleston	Barton Village, Inc	West Charleston, VT	7 GWh	Jun 1931	Dec 2024	Water
West Danville 15	Green Mountain Power Corp	Danville, VT	3 GWh	Dec 1916	Dec 2024	Water
West Davisville Solar	Altus Power America Management, LLC	North Kingstown, RI	3 GWh	Nov 2013	Dec 2024	Solar
West Enfield Hydro	Brookfield Black Bear Hydro, LLC	West Enfield, ME	77 GWh	Mar 1988	Dec 2024	Water
West Greenwich Solar	Consolidated Edison Development Inc.	West Greenwich, RI	3 GWh	Apr 2013	Sep 2025	Solar
West Groton CHP	Hollingsworth & Vose Co West Groton	Groton, MA	22 GWh	Nov 2015	Dec 2024	Natural Gas
West Haydenville PJ Community Solar	AES Distributed Energy	Williamsburg, MA	9 GWh	Aug 2022	Dec 2024	Solar
West Street Solar 1 LLC	AES Distributed Energy	Gardner, MA	9 GWh	Nov 2019	Dec 2024	Solar
West Tisbury Generating Facility	Vineyard Reliability LLC	West Tisbury, MA	3 GWh	Dec 1974	Dec 2024	Distillate Fuel Oil
West Water Street	City of Taunton	Taunton, MA	2 GWh	Dec 2017	Dec 2024	Distillate Fuel Oil
Westborough Solar LLC	SunRay Power LLC	Westborough, MA	2 GWh	Mar 2014	Dec 2024	Solar
Westbrook Energy Center Power Plant	Westbrook Energy Center	Westbrook, ME	3 TWh	Apr 2001	Sep 2025	Natural Gas
Westford Solar Park	MN8 Energy LLC	Westford, MA	5 GWh	Mar 2012	Dec 2024	Solar
Westhampton	Sunrise on Montague Rd. LLC	Westhampton, MA	7 GWh	Nov 2020	Dec 2024	Solar
Westminster	MN8 Energy LLC	Westminster, VT	3 GWh	Nov 2016	Dec 2024	Solar
Westminster Renewables, LLC CSG	Westminster Renewables, LLC	Westminster, MA	2 GWh	Sep 2018	Dec 2024	Solar
Weston Hydro	Brookfield White Pine Hydro LLC	Skowhegan, ME	57 GWh	Dec 1919	Dec 2024	Water
Weston Landfill Solar	Ameresco, Inc - Weston	Weston, MA	3 GWh	Feb 2016	Dec 2024	Solar
Westport B Community Solar Garden	BWC Hamilton Brook LLC	Westport, MA	7 GWh	Oct 2018	Dec 2024	Solar
Westport Community Solar Garden	BWC Bass River LLC	Westport, MA	4 GWh	Jun 2017	Dec 2024	Solar
Westport (MA)	Sunrise on Drift Rd. LLC	Westport, MA	4 GWh	Sep 2020	Dec 2024	Solar
Westport MA 1 Community Solar	Navisun LLC	Westport, MA	2 GWh	Aug 2016	Dec 2024	Solar
Westport MA 2 Community Solar	Navisun LLC	Westport, MA	2 GWh	Aug 2016	Dec 2024	Solar
Westport Stone & Sand Solar (CSG)	AES Clean Energy	Westport, MA	6 GWh	Feb 2024	Dec 2024	Solar
Westtown CSG	Altus Power America Management, LLC	Westtown, NY	3 GWh	Apr 2019	Dec 2024	Solar
Weybridge	Green Mountain Power Corp	Weybridge, VT	14 GWh	Jan 1951	Dec 2024	Water
Whately Solar	Citizens Enterprises Corporation	Whately, MA	2 GWh	Feb 2013	Dec 2024	Solar
Whatley Renewables	Whatley Renewables, LLC	Whatley, MA	2 GWh	Sep 2020	Dec 2024	Solar
Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, CT	473 GWh	Jun 1988	Sep 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Concord Facility	Wheelabrator Environmental Systems	Concord, NH	95 GWh	Mar 1989	Sep 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, CT	101 GWh	Sep 1995	Sep 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	318 GWh	Aug 1987	Sep 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	233 GWh	Apr 1985	Sep 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Saugus	Wheelabrator Environmental Systems	Saugus, MA	226 GWh	Jul 1985	Sep 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Whitcomb Solar Farm	ERWR Whitcomb Farm Solar LLC	Essex Junction, VT	3 GWh	Sep 2014	Dec 2024	Solar
White Lake	Granite Shore Power	Tamworth, NH	484 MWh	Jun 1968	Dec 2024	Jet Fuel
White Rock Road LLC	White Rock Road LLC	Westerly, RI	7 GWh	Nov 2022	Dec 2024	Solar
Wilbraham	BWC East Brook, LLC	Wilbraham, MA	5 GWh	Nov 2020	Dec 2024	Solar
Wilbur Woods Solar LLC	AES Distributed Energy	Orange, MA	8 GWh	Aug 2021	Dec 2024	Solar
Wilder	Great River Hydro, LLC	Hartford, VT	179 GWh	Oct 1950	Dec 2024	Water
Wilkins Station	Town of Marblehead - (MA)	Marblehead, MA	94 MWh	Oct 1975	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%
Williams College - Campus CHP	President & Trustees of Williams College	Williamstown, MA	1 GWh	Feb 2003	Dec 2024	Natural Gas : 84.0% Distillate Fuel Oil : 16.0%
Williams Hydro	Brookfield White Pine Hydro LLC	Solon, ME	80 GWh	Dec 1938	Dec 2024	Water
Williams Rd	AES Distributed Energy	Ransomville, NY	6 GWh	Aug 2021	Dec 2024	Solar
Williamsburg	AES Distributed Energy	Goshen, MA	7 GWh	Jun 2019	Dec 2024	Solar
Williamsburg Solar LLC VNEM CSG	Tesla Inc.	Haydenville, MA	3 GWh	Jan 2016	Dec 2024	Solar
Williamstown Solar	CVI CleanCapital Solar 1 LLC	Williamstown, VT	2 GWh	Nov 2012	Dec 2024	Solar
Williamsville Hybrid CSG	147 Williamsville Solar 1, LLC	Hubbardston, MA	9 GWh	Aug 2021	Dec 2024	Solar
Wilmarth Solar	Wilmarth Lane Solar 1, LLC	Plainville, MA	8 GWh	Jan 2020	Dec 2024	Solar
Wilmington Solar	MN8 Energy LLC	Wilmington, MA	3 GWh	Oct 2015	Dec 2024	Solar
Wilson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
Wilson Solar (MA)	Consolidated Edison Solutions Inc.	Spencer, MA	2 GWh	May 2013	Dec 2024	Solar
Winchendon Landfill Solar	Onyx Asset Services Group	Winchendon, MA	3 GWh	Sep 2018	Dec 2024	Solar
Winchendon Solar	Altus Power America Management, LLC	Winchendon, MA	2 GWh	Mar 2014	Dec 2024	Solar
Wind Colebrook South	Wind Colebrook South	Colebrook, CT	11 GWh	Oct 2015	Sep 2025	Wind
Winslow PV - BD Solar 2 LLC	BD Solar 2 LLC	Winslow, ME	13 GWh	Jun 2022	Dec 2024	Solar
Woburn	Greenbacker Renewable Energy Corporation	Woburn, MA	2 GWh	Nov 2020	Dec 2024	Solar
Woodchuck Solar, LLC CSG	38 Degrees North, LLC	Spencer, MA	2 GWh	Nov 2017	Dec 2024	Solar
Woodland Avenue Solar 1	Woodland Avenue Solar 1, LLC	Seekonk, MA	8 GWh	Jul 2020	Dec 2024	Solar
Woods Hill Solar	Woods Hill Solar, LLC	Pomfret, CT	25 GWh	Nov 2018	Sep 2025	Solar
Worcester Landfill	City of Worcester DPW	Worcester, MA	8 GWh	Apr 2017	Dec 2024	Solar
Worumbo Hydro Station	Eagle Creek Renewable Energy, LLC	Lisbon Falls, ME	89 GWh	Jan 1989	Dec 2024	Water
Wrightsville Hydro Plant	Washington Electric Coop - (VT)	Montpelier, VT	2 GWh	Aug 1985	Nov 2024	Water
WYM 1250 Palmer LLC	CVI CleanCapital Solar 6	Palmer, MA	1 GWh	Aug 2013	Dec 2024	Solar
Wyman Hydro	Brookfield White Pine Hydro LLC	Bingham, ME	337 GWh	Dec 1929	Dec 2024	Water
Yale New Haven - New London	Bloom Energy	New London, CT	15 GWh	Aug 2022	Dec 2024	Natural Gas
ZPD-PT Solar Project 2017-006 LLC Hybrid	AES Distributed Energy	Warren, MA	5 GWh	Jun 2021	Dec 2024	Solar
ZPD-PT Solar Project 2017-021 LLC Hybrid	AES Distributed Energy	Wilbraham, MA	2 GWh	Dec 2020	Dec 2024	Solar
ZPD-PT Solar Project 2017-023 LLC Hybrid	AES Distributed Energy	Southbridge, MA	4 GWh	Dec 2020	Dec 2024	Solar
ZPD-PT Solar Project 2017-038 Hybrid LLC	AES Distributed Energy	Lancaster, MA	7 GWh	Mar 2021	Dec 2024	Solar
ZPD-PT Solar Project 2017-044 LLC CSG	AES Distributed Energy	Spencer, MA	1 GWh	Sep 2021	Dec 2024	Solar
0 Hammond St CSG	0HAM WHAM8 Solar, LLC	Carver, MA	14 GWh	Sep 2021	Dec 2024	Solar
1 Commercial	Madison Energy Investments LLC	Sharon, MA	770 MWh	Aug 2023	Dec 2024	Solar
10 Briggs Solar NG, LLC (East)	NuGen Capital Management	East Greenwich, RI	7 GWh	May 2021	Dec 2024	Solar
115 G Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	1 GWh	Sep 2015	Dec 2024	Solar
118 Echo	Madison Energy Investments LLC	Mashpee, MA	4 MWh	Jun 2023	Dec 2024	Solar
126 Grove Solar LLC	Altus Power America Management, LLC	Franklin, MA	2 GWh	May 2012	Dec 2024	Solar
15 Glen Harris RD	ME Sandy River LLC	New Sharon, ME	2 GWh	May 2024	Dec 2024	Solar
154 D Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Nov 2015	Dec 2024	Solar
158th Fighter Wing Solar Farm	158th Fighter Wing	South Burlington, VT	1 GWh	Aug 2011	Dec 2023	Solar
160 Tihonet Rd Hybrid(CSG)	160TIH WHAM8 Solar, LLC	Wareham, MA	10 GWh	Nov 2021	Dec 2024	Solar
1639 RT 29 Solar 1	1639 RT 29 Solar 1, LLC	Gloversville, NY	8 GWh	Nov 2020	Dec 2024	Solar
1639 RT 29 Solar 2	1639 RT 29 Solar 2, LLC	Gloversville, NY	5 GWh	Nov 2020	Dec 2024	Solar
196 Tremont St(CSG)	196TRE WHAM8 Solar, LLC	Carver, MA	4 GWh	Oct 2021	Dec 2024	Solar
201 Sturbridge B	Altus Power America Management, LLC	Brimfield, MA	2 GWh	May 2014	Dec 2024	Solar
205 Sturbridge A	Altus Power America Management, LLC	Brimfield, MA	3 GWh	May 2014	Dec 2024	Solar
265 Pleasant Solar NG, LLC	NuGen Capital Management	Lunenburg, MA	1 GWh	Jun 2014	Dec 2024	Solar
276 Federal Rd(CSG)	276FED WHAM8 Solar, LLC	Carver, MA	10 GWh	Oct 2021	Dec 2024	Solar
28 Livermore Hill Road Solar	28 Livermore Hill Road Solar, LLC	Westminster, MA	8 GWh	May 2020	Dec 2024	Solar
299 Farm to Market Rd Hybrid(CSG)	299F2M WHAM8 Solar, LLC	Wareham, MA	6 GWh	Nov 2021	Dec 2024	Solar
301 Chestnut Solar NG	NuGen Capital Management	East Longmeadow, MA	2 GWh	Mar 2017	Dec 2024	Solar
3104 Batavia Solar	3104 Batavia Solar, LLC	Batavia, NY	5 GWh	Feb 2021	Dec 2024	Solar
3232 Batavia Solar	3232 Batavia Solar, LLC	Batavia, NY	7 GWh	Feb 2021	Dec 2024	Solar
3Colton	Madison Energy Holdings LLC	Millbury, MA	5 GWh	Jun 2023	Dec 2024	Solar
433 Purchase Solar NG, LLC	NuGen Capital Management	Swansea, MA	4 GWh	Mar 2012	Dec 2024	Solar
5 Berry	Madison Energy Investments LLC	Plainsville, MA	4 GWh	Aug 2023	Dec 2024	Solar
515 Main Saugus	515 Main Saugus LLC	Saugus, MA	2 GWh	Aug 2017	Dec 2024	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	696.7 GWh	4
#25	Dominion Energy South Carolina, Inc.	25.7 TWh	87
#13	Duke Energy Carolinas	112.5 TWh	565
#17	Duke Energy Progress East	64.3 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	131.6 TWh	1,211
#1	PJM Interconnection, LLC	870.7 TWh	2,465
#30	South Carolina Public Service Authority	18.9 TWh	34
#59	Southeastern Power Administration	1.5 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	188.0 TWh	2,075
#9	Tennessee Valley Authority	161.6 TWh	204
#10	Florida Power & Light Co.	148.9 TWh	187
#12	New York Independent System Operator	131.6 TWh	1,211
#13	Duke Energy Carolinas	112.5 TWh	565
#15	ISO New England	105.5 TWh	1,577
#16	Bonneville Power Administration	80.5 TWh	163
#17	Duke Energy Progress East	64.3 TWh	559
#18	PacifiCorp East	61.1 TWh	216
#19	Salt River Project Agricultural Improvement and Power District	60.0 TWh	48