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
Medway Grid	Medway Grid LLC	Medway, MA	18 GWh	-	Jun 2026	Electricity used for energy storage
Mendon	BWC Box Pond LLC	Mendon, MA	3 GWh	Nov 2017	Dec 2025	Solar
BWC Mystic River	BWC Mystic River LLC	Mendon, MA	2 GWh	Jun 2017	Dec 2025	Solar
BWC Muddy Brook, LLC Hybrid	AES Distributed Energy	Mendon, MA	2 GWh	Aug 2021	Dec 2025	Solar
BWC Wading River One, Two, Three CSG	Ameresco BWC Wading River LLC	Mendon, MA	2 GWh	Oct 2017	Dec 2025	Solar
Merrimac Solar	RWE Clean Energy	Merrimac, MA	2 GWh	Nov 2013	Dec 2025	Solar
Merrimack Solar Farm, LLC	Merrimack Solar Farm	Merrimack, NH	3 GWh	Dec 2018	Dec 2025	Solar
Danton XI Solar LLC	Danton XI Solar LLC	Methuen, MA	2 GWh	Dec 2013	Dec 2025	Solar
Aegean Drive Solar	Aegean Drive Solar LLC	Methuen, MA	2 GWh	Aug 2021	Dec 2025	Solar
Ayers Village Solar	Altus Power America Management, LLC	Methuen, MA	3 GWh	May 2014	Dec 2025	Solar
Methuen Landfill	CleanCapital Holdings	Methuen, MA	2 GWh	Jun 2013	Dec 2025	Solar
Saratoga Solar III, LLC	Green Street Power Partners	Middle Grove, NY	5 GWh	Nov 2023	Dec 2025	Solar
115 G Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Sep 2015	Dec 2025	Solar
154 D Fisher	Greenbacker Renewable Energy Corporation	Middleborough, MA	2 GWh	Nov 2015	Dec 2025	Solar
Cranberry Solar	GWE Cranberry Solar RT, LLC	Middleborough, MA	2 GWh	Nov 2016	Dec 2025	Solar
Lower Middlebury	Green Mountain Power Corp	Middlebury Lower, VT	5 GWh	Jul 1917	Dec 2025	Water
Middlebury College	Middlebury College Biomass	Middlebury, VT	2 GWh	Dec 1979	Jun 2026	Wood/Wood Waste Solids : 58.5% Natural Gas : 41.5%
South Street - Middlebury	Greenbacker Renewable Energy Corporation	Middlebury, VT	9 GWh	Nov 2023	Dec 2025	Solar
Middleton Solar Park	Novis Renewables, LLC	Middleton, MA	7 GWh	May 2018	Dec 2025	Solar
FedEx Middletown	VCP Realty, LLC	Middletown, CT	2 GWh	Oct 2024	Dec 2025	Solar
CP Middletown Solar II LLC	Green Street Power Partners	Middletown, CT	2 GWh	Nov 2019	Dec 2025	Solar
CP Middletown Solar I LLC	Green Street Power Partners	Middletown, CT	2 GWh	Nov 2019	Dec 2025	Solar
FDX010.0 FedEx Fuel Cell	2016 ESA Project Company, LLC	Middletown, CT	8 GWh	Aug 2018	Dec 2025	Natural Gas
Kleen Energy Systems	Kleen Energy Systems, LLC	Middletown, CT	4 TWh	Jun 2011	Jul 2026	Natural Gas : 98.0% Distillate Fuel Oil : 2.0%
GenConn Middletown LLC	GenConn Middletown LLC	Middletown, CT	6 GWh	May 2011	Dec 2025	Kerosene : 77.4% Natural Gas : 22.6%
Wesleyan University Cogen 1	Wesleyan University	Middletown, CT	4 GWh	Jan 2009	Dec 2025	Natural Gas
Middletown	Middletown Power LLC	Middletown, CT	87 GWh	Sep 1958	Dec 2025	Residual Fuel Oil : 99.9%
Milford Power Project	Milford Power Co LLC	Milford, CT	3 TWh	Jan 2004	Jul 2026	Natural Gas
GenConn Devon LLC	GenConn Devon LLC	Milford, CT	15 GWh	May 2010	Dec 2025	Kerosene : 75.4% Natural Gas : 24.6%
Dynamic Energy CT STAG	Milford Pepes Farm Road Solar LLC	Milford, CT	2 GWh	Jul 2023	Dec 2025	Solar
Milford Hydro Station	Brookfield Black Bear Hydro, LLC	Milford, ME	36 GWh	Jun 1941	Dec 2025	Water
Milford Power LP	Milford Power LLC	Milford, MA	253 GWh	Feb 1993	Dec 2025	Natural Gas
Millbury Solar	Evergreen Wind, LLC	Millbury, MA	5 GWh	Mar 2014	Dec 2025	Solar
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	288 GWh	Aug 1987	Jul 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Millbury MA #1092	Millbury MA #1092 LLC	Millbury, MA	2 GWh	May 2019	Dec 2025	Solar
3Colton	Madison Energy Holdings LLC	Millbury, MA	5 GWh	Jun 2023	Dec 2025	Solar
Syncarpha Millbury Hybrid (CSG)	Syncarpha Millbury, LLC	Millbury, MA	8 GWh	Sep 2022	Dec 2025	Solar
Our Katahdin	Greenbacker Renewable Energy Corporation	Millenocket, ME	6 GWh	Nov 2024	Dec 2025	Solar
Montague Site 36-Grosolar	NSTAR Electric Company	Millers Falls, MA	6 GWh	Sep 2018	Jul 2026	Solar
Great Lakes Hydro America - ME	Great Lakes Hydro America LLC	Millinocket, ME	500 GWh	Jun 1917	Dec 2025	Water
Millis MA 1	Millis MA 1 LLC	Millis, MA	2 GWh	Oct 2018	Dec 2025	Solar
Milo PV - BD Solar 1 LLC	BD Solar 1 LLC	Milo, ME	25 GWh	May 2021	Dec 2025	Solar
Milo CSG	Milo CSG, LLC	Milo, ME	7 GWh	Jan 2022	Dec 2025	Solar
Milton Hydro	SFR Hydro Cor	Milton, NH	5 GWh	Dec 1913	Dec 2025	Water
Marlborough Solar	Marlborough Solar, LLC	Milton, NY	3 GWh	Feb 2021	Dec 2025	Solar
Georgia Mountain Community Wind Farm	Greenbacker Renewable Energy Corporation	Milton, VT	25 GWh	Nov 2012	Jul 2026	Wind
GMP Solar/Storage-Milton Hybrid	Green Mountain Power Corp	Milton, VT	7 GWh	Aug 2019	Jul 2026	Solar
Clark Falls	Green Mountain Power Corp	Milton, VT	14 GWh	Jan 1937	Dec 2025	Water
Milton	Green Mountain Power Corp	Milton, VT	34 GWh	Jan 1929	Dec 2025	Water
Peterson	Green Mountain Power Corp	Milton, VT	25 GWh	Jan 1948	Dec 2025	Water
Clemons Road Solar	RPNY Solar 4, LLC	Minoa, NY	4 GWh	Jun 2024	Dec 2025	Solar
Monmouth	Maine DG Solar Monmouth, LLC	Monmouth, ME	9 GWh	Feb 2022	Dec 2025	Solar
Stevenson	FirstLight Power Resources Services LLC	Monroe, CT	71 GWh	Dec 1918	Dec 2025	Water
Comerford	Great River Hydro, LLC	Monroe, NH	297 GWh	Aug 1930	Dec 2025	Water
Monson Solar	Altus Power America Management, LLC	Monson, MA	4 GWh	Jun 2014	Dec 2025	Solar
Monson Solar, LLC	Monson Solar, LLC	Monson, MA	3 GWh	Jul 2017	Dec 2025	Solar
Bowden Solar LLC	38DN Power Fund 1 LLC	Monson, MA	3 GWh	Feb 2019	Dec 2025	Solar
Kearsarge Montague BD(CSG)	Kearsarge Montague BD LLC	Montague, MA	3 GWh	Oct 2021	Dec 2025	Solar
Kearsarge Montague	Kearsarge Montague LLC	Montague, MA	7 GWh	May 2018	Dec 2025	Solar
Turners Falls	FirstLight Power Resources, Inc. - MA	Montague, MA	12 GWh	Dec 1904	Dec 2025	Water
Cabot	FirstLight Power Resources, Inc. - MA	Montague, MA	239 GWh	Dec 1914	Dec 2025	Water
Wrightsville Hydro Plant	Washington Electric Coop - (VT)	Montpelier, VT	374 MWh	Aug 1985	Dec 2025	Water
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	132 GWh	Mar 2005	Jul 2026	Natural Gas
Middlesex 2	Green Mountain Power Corp	Moretown, VT	6 GWh	Dec 1927	Dec 2025	Water
Lawrence Brook	Greenbacker Renewable Energy Corporation	Morristown, VT	3 GWh	Nov 2020	Dec 2025	Solar
ER Salvage Yard	Altus Power America Management, LLC	Morrisville, VT	3 GWh	Oct 2021	Dec 2025	Solar
Morrisville	Village of Morrisville - (VT)	Morrisville, VT	5 GWh	Jul 1924	Dec 2025	Water
Cadys Falls	Village of Morrisville - (VT)	Morrisville, VT	2 GWh	Jul 1914	Dec 2025	Water
Moscow	Greenbacker Renewable Energy Corporation	Moscow, ME	127 GWh	May 2025	Jul 2026	Wind
Ottauquechee Hydro	Green Mountain Power Corp	N. Hartland, VT	3 GWh	Mar 1983	Dec 2025	Water
Block Island Wind Farm	Deepwater Wind Block Island LLC	NA, RI	81 GWh	Nov 2016	Jul 2026	Wind
Naples	Naples Casco Solar 1, LLC	Naples, ME	3 GWh	Nov 2021	Dec 2025	Solar
Nashua Plant	NextEra Renewable Fuels, LLC	Nashua, NH	13 GWh	Mar 1996	Dec 2025	Landfill Gas
Mine Falls Generating Station	City of Nashua - (NH)	Nashua, NH	9 GWh	Nov 1985	Dec 2025	Water
Natick Mall	Natick Mall	Natick, MA	4 GWh	Dec 2014	Dec 2024	Solar
Town of Needham VNEM CSG	Tesla Inc.	Needham, MA	4 GWh	Jan 2016	Dec 2025	Solar
Greater New Bedford LFG Utiliz. Facility	CommonWealth New Bedford Energy LLC	New Bedford, MA	13 GWh	Sep 2005	Dec 2025	Landfill Gas
Sullivan Solar	Altus Power America Management, LLC	New Bedford, MA	2 GWh	Jul 2014	Dec 2025	Solar
376 Nash	Madison Energy Investments LLC	New Bedford, MA	17 MWh	Nov 2024	Dec 2025	Solar
CCSU Co-Gen-STBY Gen	Central Connecticut State University	New Britain, CT	10 MWh	Sep 1993	Dec 2025	Natural Gas
CCSU Fuel Cell Project	New Britain Renewable Energy, LLC	New Britain, CT	7 GWh	Mar 2012	Dec 2025	Natural Gas
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	21 GWh	Jul 2015	Jul 2026	Natural Gas
IKEA New Haven Rooftop PV & Fuel Cell	IKEA Property Inc	New Haven, CT	3 GWh	Jun 2012	Dec 2025	Natural Gas : 71.5% Solar : 28.5%
New Haven Steam	Generation Bridge II Connecticut, LLC	New Haven, CT	141 GWh	Jun 1975	Jul 2026	Residual Fuel Oil : 53.7% Natural Gas : 31.8% Distillate Fuel Oil : 12.3% Kerosene : 2.3%
Amazon BDL3 Solar Project	Solar Star Prime 1 LLC	New Haven, CT	2 GWh	Sep 2019	Dec 2025	Solar
Open View Solar Farm	Cross Pollination Inc	New Haven, VT	3 GWh	Aug 2013	Dec 2025	Solar
Beldens	Green Mountain Power Corp	New Haven, VT	6 GWh	Jul 1913	Dec 2025	Water
Next Generation Solar Farm	Cypress Creek Renewables	New Haven, VT	4 GWh	Nov 2017	Dec 2025	Solar
Connecticut College	Bloom Energy	New London, CT	10 GWh	Aug 2019	Dec 2025	Natural Gas
Yale New Haven - New London	Bloom Energy	New London, CT	14 GWh	Aug 2022	Dec 2025	Natural Gas
New Marlborough	Sunrise on Knight Rd. LLC	New Marlborough, MA	7 GWh	May 2021	Dec 2025	Solar
Bulls Bridge	FirstLight Power Resources Services LLC	New Milford, CT	27 GWh	Dec 1902	Dec 2025	Water
Kimberly Clark-Unit 1,2,3	Kimberly-Clark Corporation	New Milford, CT	233 GWh	Mar 2008	Dec 2025	Natural Gas
New Milford Gas Recovery	WM Renewable Energy LLC	New Milford, CT	4 GWh	Apr 2008	Dec 2025	Landfill Gas
15 Glen Harris RD	ME Sandy River LLC	New Sharon, ME	5 GWh	May 2024	Dec 2025	Solar
Bashaw Solar CSG 1, LLC	Bashaw Solar 1, LLC	Newbury, MA	3 GWh	Mar 2017	Dec 2025	Solar
Newington Energy Center	Essential Power Operating Services, LLC	Newington, NH	2 TWh	Sep 2002	Jul 2026	Natural Gas : 92.9% Distillate Fuel Oil : 7.1%
Newington	Granite Shore Power	Newington, NH	136 GWh	May 1974	Jul 2026	Residual Fuel Oil : 73.7% Natural Gas : 24.7% Distillate Fuel Oil : 1.6%
Newport	Great Bay Hydro Corp	Newport, VT	13 GWh	Dec 1935	Dec 2025	Water
Main Rd Community Solar	AES Distributed Energy	Newstead, NY	8 GWh	Jun 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