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
Pulpit Hill	LSE Fornax LLC	Amherst, MA	7 GWh	Jun 2019	Dec 2025	Solar
Millbury MA #1092	Millbury MA #1092 LLC	Millbury, MA	2 GWh	May 2019	Dec 2025	Solar
Plainfield Pike	Captona Plainfield Pike Johnston LLC	Johnston, RI	4 GWh	May 2019	Dec 2025	Solar
Carver CSG	Altus Power America Management, LLC	Carver, MA	3 GWh	Apr 2019	Dec 2025	Solar
Westtown CSG	Altus Power America Management, LLC	Westtown, NY	3 GWh	Apr 2019	Dec 2025	Solar
Gold Meadow Farms	Captona Lippitt Ave Cranston LLC	Cranston, RI	27 GWh	Apr 2019	Dec 2025	Solar
Hopkinton CSG	Altus Power America Management, LLC	Hopkinton, MA	3 GWh	Mar 2019	Dec 2025	Solar
Centech Gas Generator	Town of Shrewsbury - (MA)	Shrewsbury, MA	428 MWh	Mar 2019	Dec 2025	Natural Gas
Exelon West Medway II LLC	Constellation Power, Inc	Medway, MA	259 GWh	Feb 2019	May 2026	Natural Gas : 95.3% Kerosene : 4.7%
Bowden Solar LLC	38DN Power Fund 1 LLC	Monson, MA	3 GWh	Feb 2019	Dec 2025	Solar
Savoy Solar PV	NSTAR Electric Company	Savoy, MA	3 GWh	Jan 2019	Dec 2025	Solar
Southampton Solar PV	NSTAR Electric Company	Southampton, MA	3 GWh	Jan 2019	Dec 2025	Solar
Plainfield Community Solar LLC	Plainfield Solar LLC	Plainfield, MA	3 GWh	Jan 2019	Dec 2025	Solar
GSPP Terrawatt Westfield LLC CSG	Green Street Power Partners	Westfield, MA	6 GWh	Jan 2019	Dec 2025	Solar
GSPP Raynham TMLP, LLC CSG	Green Street Power Partners	Raynham, MA	4 GWh	Jan 2019	Dec 2025	Solar
Ward Solar 1, LLC	REA Investments, LLC	Carver, MA	3 GWh	Jan 2019	Dec 2025	Solar
Greenfield Solar PV	NSTAR Electric Company	Greenfield, MA	3 GWh	Dec 2018	Dec 2025	Solar
Hinsdale Solar PV	NSTAR Electric Company	Hinsdale, MA	3 GWh	Dec 2018	Dec 2025	Solar
Springfield Solar PV	NSTAR Electric Company	Springfield, MA	6 GWh	Dec 2018	Dec 2025	Solar
Southwick Solar PV	NSTAR Electric Company	Southwick, MA	8 GWh	Dec 2018	May 2026	Solar
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	6 GWh	Dec 2018	May 2026	Wind
WED Plainfield II, LLC	WED Plainfield II, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
WED Plainfield III, LLC	WED Plainfield III, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Plainfield, LLC	WED Plainfield, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Shun I, LLC	WED Shun I, LLC	Johnston, RI	7 GWh	Dec 2018	May 2026	Wind
WED Shun II, LLC	WED Shun II, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Shun III, LLC	WED Shun III, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
WED GW Solar, LLC	CleanCapital Holdings	Lincoln, RI	4 GWh	Dec 2018	Dec 2025	Solar
GSPP Devens, LLC	Green Street Power Partners	Ayer, MA	3 GWh	Dec 2018	Dec 2025	Solar
GSPP Boxborough Littleton (MA)	CleanCapital Holdings	Boxborough, MA	6 GWh	Dec 2018	Dec 2025	Solar
Merrimack Solar Farm, LLC	Merrimack Solar Farm	Merrimack, NH	3 GWh	Dec 2018	Dec 2025	Solar
North Smithfield Solar Power 1	Onsite Partners, LLC	North Smithfield, RI	2 GWh	Nov 2018	Dec 2025	Solar
Woods Hill Solar	Woods Hill Solar, LLC	Pomfret, CT	22 GWh	Nov 2018	May 2026	Solar
Coolidge Solar 1, LLC	Coolidge Solar I, LLC	Ludlow, VT	25 GWh	Nov 2018	May 2026	Solar
Wareham Solar PV	NSTAR Electric Company	Wareham, MA	1 GWh	Nov 2018	Dec 2025	Solar
Hatfield Solar PV	NSTAR Electric Company	Hatfield, MA	5 GWh	Nov 2018	Dec 2025	Solar
Richmond NMCA	AES Distributed Energy	Wood River Junction, RI	6 GWh	Nov 2018	May 2026	Solar
BWC Origination 18	BWC Origination 18, LLC	Mattapoisett, MA	7 GWh	Nov 2018	Dec 2025	Solar
BWC Gibbs Brook	BWC Gibbs Brook, LLC	Wareham, MA	7 GWh	Nov 2018	Dec 2025	Solar
BWC Wareham River	BWC Wareham River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Harlow Brook	BWC Harlow Brook, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Pocasset River	BWC Pocasset River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
Washburn Road Solar	REA Investments, LLC	Freetown, MA	3 GWh	Nov 2018	Dec 2025	Solar
Lakeville Solar	C2 MA Lakeville, LLC	Lakeville, MA	3 GWh	Nov 2018	Dec 2025	Solar
A Street 2	Captona A Street 2 Johnston LLC	Johnston, RI	3 GWh	Nov 2018	Dec 2025	Solar
Kilvert	Captona Kilvert Street Warwick LLC	Warwick, RI	8 GWh	Nov 2018	Dec 2025	Solar
A Street 1	Captona A Street 1 Johnston LLC	Johnston, RI	2 GWh	Nov 2018	Dec 2025	Solar
Georges River Energy	Robbins Lumber Inc	Searsmont, ME	52 GWh	Nov 2018	Dec 2024	Wood/Wood Waste Solids
Adirondack A+B Community Solar Garden	BWC Connecticut River LLC	Westport, MA	8 GWh	Nov 2018	Dec 2024	Solar
Rochester MA 2	Rochester MA 2 LLC	Rochester, MA	1 GWh	Nov 2018	Dec 2025	Solar
Wendell MA 1	Wendell MA 1 LLC	Wendell, MA	1 GWh	Nov 2018	Dec 2025	Solar
Millis MA 1	Millis MA 1 LLC	Millis, MA	2 GWh	Oct 2018	Dec 2025	Solar
Tanglewood Circle Solar 1 LLC	Tanglewood Circle Solar 1 LLC	Becket, MA	7 GWh	Oct 2018	Dec 2025	Solar
Westport B Community Solar Garden	BWC Hamilton Brook LLC	Westport, MA	8 GWh	Oct 2018	Dec 2025	Solar
Saint Albans Solar	Cypress Creek Renewables	Georgia, VT	7 GWh	Sep 2018	Dec 2025	Solar
Montague Site 36-Grosolar	NSTAR Electric Company	Millers Falls, MA	6 GWh	Sep 2018	May 2026	Solar
East Springfield Solar PV	NSTAR Electric Company	Springfield, MA	2 GWh	Sep 2018	Dec 2025	Solar
Westminster Renewables, LLC CSG	Westminster Renewables, LLC	Westminster, MA	2 GWh	Sep 2018	Dec 2025	Solar
Winchendon Landfill Solar	Onyx Asset Services Group	Winchendon, MA	3 GWh	Sep 2018	Dec 2024	Solar
Kearsarge SKSC1 LLC	Kearsarge SKSC1 LLC	South Kingstown, RI	5 GWh	Sep 2018	Dec 2025	Solar
Kearsarge SKSC2 LLC	Kearsarge SKSC2 LLC	South Kingstown, RI	6 GWh	Sep 2018	Dec 2025	Solar
Manchester Community College East	Onyx Asset Services Group	Manchester, CT	2 GWh	Sep 2018	Dec 2024	Solar
Manchester Community College North	Onyx Asset Services Group	Great Path, CT	1 GWh	Sep 2018	Dec 2024	Solar
Battle Creek Solar	Ecos Energy LLC	Bennington, VT	3 GWh	Sep 2018	Dec 2025	Solar
North Providence	Captona N.P. LLC	North Providence, RI	3 GWh	Sep 2018	Dec 2025	Solar
Big George PV CSG	Altus Power America Management, LLC	Plymouth, MA	1 GWh	Aug 2018	Dec 2025	Solar
Sunderland Solar PV	NSTAR Electric Company	Sunderland, MA	2 GWh	Aug 2018	Dec 2025	Solar
Kearsarge Uxbridge	Kearsarge Uxbridge LLC	Uxbridge, MA	3 GWh	Aug 2018	Dec 2025	Solar
GSPP Gilman, LLC	Green Street Power Partners	Lunenburg, VT	3 GWh	Aug 2018	Dec 2025	Solar
FDX010.0 FedEx Fuel Cell	2016 ESA Project Company, LLC	Middletown, CT	8 GWh	Aug 2018	Dec 2025	Natural Gas
580 River Solar	NuGen Capital Management	Winchendon, MA	4 GWh	Aug 2018	Dec 2025	Solar
Antanavica Solar	SunStrong Management, LLC	Leicester, MA	1 GWh	Jul 2018	Dec 2024	Solar
Trinity College Fuel Cell	Onsite Partners, LLC	Hartford, CT	12 GWh	Jul 2018	Dec 2024	Natural Gas
Ludlow Site 72 - Conti	NSTAR Electric Company	Ludlow, MA	3 GWh	Jul 2018	Dec 2025	Solar
Pittsfield 44 - M&W PV	NSTAR Electric Company	Pittsfield, MA	2 GWh	Jul 2018	Dec 2025	Solar
Lee Site 31 Solar	NSTAR Electric Company	Lee, MA	149 MWh	Jul 2018	Dec 2025	Solar
Kearsarge GB	Kearsarge GB LLC	Great Barrington, MA	3 GWh	Jul 2018	Dec 2025	Solar
Brattleboro (Windham Landfill)	Altus Power America Management, LLC	Brattleboro, VT	6 GWh	Jul 2018	Dec 2025	Solar
Bullock Road Solar 1	Bullock Road Solar 1, LLC	Freetown, MA	4 GWh	Jun 2018	Dec 2025	Solar
Ashby Solar, LLC CSG	Ashby Solar, LLC	Fitchburg, MA	3 GWh	Jun 2018	Dec 2025	Solar
Dudley	AMP MA Dudley	Dudley, MA	8 GWh	Jun 2018	Dec 2025	Solar
Town of Branford	Tesla Inc.	Branford, CT	2 GWh	May 2018	Dec 2025	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	2 GWh	May 2018	Dec 2025	Solar
Kearsarge Montague	Kearsarge Montague LLC	Montague, MA	7 GWh	May 2018	Dec 2025	Solar
Middleton Solar Park	Novis Renewables, LLC	Middleton, MA	7 GWh	May 2018	Dec 2024	Solar
SELCO Community Solar	Massachusetts Mun Wholes Electric Co	Shrewsbury, MA	5 GWh	May 2018	Dec 2025	Solar
Lilly Lane	LSE Chamaeleon LLC	Charlton, MA	2 GWh	May 2018	Oct 2025	Solar
Sturbridge Barn	LSE Ara LLC	Charlton, MA	2 GWh	May 2018	Dec 2025	Solar
CPV Towantic Energy Center	CPV Towantic, LLC	Oxford, CT	6 TWh	Apr 2018	May 2026	Natural Gas
Salem Harbor Power Development LP	Salem Harbor Power Development LP	Salem, MA	2 TWh	Apr 2018	May 2026	Natural Gas
Stafford St 2 Community Solar	Stafford St Solar 2, LLC	Lecister, MA	4 GWh	Apr 2018	Dec 2024	Solar
Ticket Network South Windsor	Powerflex	South Windsor, CT	2 GWh	Apr 2018	Dec 2024	Solar
Joe Jenny	AMP MA Joe Jenny	Oxford, MA	2 GWh	Apr 2018	Dec 2024	Solar
Corbin Russwin Phase 3 Berlin	Powerflex	Berlin, CT	2 GWh	Mar 2018	Dec 2025	Solar
Boutillier Solar, LLC CSG	38 Degrees North, LLC	Leicester, MA	5 GWh	Mar 2018	Dec 2025	Solar
Fusion Solar Center LLC	Fusion Solar Centre, L.L.C	Baltic, CT	38 GWh	Feb 2018	May 2026	Solar
Belchertown Renewables Community Solar	Belchertown Renewables, LLC	Belchertown, MA	6 GWh	Feb 2018	Dec 2025	Solar
Theodore Drive Community Solar	Theodore Drive Solar, LLC	Westminster, MA	2 GWh	Feb 2018	Dec 2025	Solar
Town of Rocky Hill PV CSG	Tesla Inc.	Rocky Hill, CT	5 GWh	Feb 2018	Dec 2025	Solar
MA Solar Storage 1 Hybrid	Origis Energy USA, Inc	Sterling, MA	1 GWh	Feb 2018	Dec 2025	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