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
Hadley 3 Solar (North)	Hadley 3 Solar, LLC (North)	Hadley, MA	3 GWh	Nov 2019	Dec 2025	Solar
Hadley 3 Solar (South)	Hadley 3 Solar, LLC (South)	Hadley, MA	3 GWh	Nov 2019	Dec 2025	Solar
Alton Road Solar	Revity Energy LLC	Bradford, RI	24 GWh	Nov 2019	Dec 2025	Solar
Long Plain Solar	Long Plain Solar, LLC	Whatley, MA	4 GWh	Nov 2019	Dec 2025	Solar
Ashland Solar	Citizens Enterprises Corporation	Ashland, MA	6 GWh	Nov 2019	Dec 2025	Solar
Hampden Solar PV	NSTAR Electric Company	Hampden, MA	6 GWh	Oct 2019	Dec 2025	Solar
East Longmeadow Solar PV	NSTAR Electric Company	East Longmeadow, MA	8 GWh	Sep 2019	Dec 2025	Solar
Palmer	AES Distributed Energy	Palmer, MA	6 GWh	Sep 2019	Dec 2025	Solar
Happy Hollow CSG Hybrid	REA Investments, LLC	Winchendon, MA	8 GWh	Sep 2019	Dec 2025	Solar
Gardner - Otter River Road	Otter River Road Solar LLC	Gardner, MA	4 GWh	Sep 2019	Dec 2025	Solar
Amazon BDL3 Solar Project	Solar Star Prime 1 LLC	New Haven, CT	2 GWh	Sep 2019	Dec 2025	Solar
Hope Farm Solar, LLC	Adapture Renewables, Inc.	Cranston, RI	16 GWh	Aug 2019	Dec 2025	Solar
GMP Solar/Storage-Milton Hybrid	Green Mountain Power Corp	Milton, VT	7 GWh	Aug 2019	Jul 2026	Solar
GMP Solar/Storage-Ferrisburgh Hybrid	Green Mountain Power Corp	Ferrisburgh, VT	8 GWh	Aug 2019	Jul 2026	Solar
GMP Solar/Storage-Essex Hybrid	Green Mountain Power Corp	Essex, VT	7 GWh	Aug 2019	Jul 2026	Solar
Connecticut College	Bloom Energy	New London, CT	10 GWh	Aug 2019	Dec 2025	Natural Gas
Wachusett Solar	Wachusett Solar, LLC	Rutland, MA	3 GWh	Jul 2019	Dec 2025	Solar
Nautilus Goat Island Solar LLC (CSG)	Nautilus Solar Solutions	Burrillville, RI	4 GWh	Jul 2019	Dec 2025	Solar
Williamsburg	AES Distributed Energy	Goshen, MA	6 GWh	Jun 2019	Dec 2025	Solar
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	231 GWh	Feb 2019	Jul 2026	Natural Gas : 94.7% Kerosene : 5.3%
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	Jul 2026	Solar
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	6 GWh	Dec 2018	Jun 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	Jun 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	Jul 2026	Solar
Coolidge Solar 1, LLC	Coolidge Solar I, LLC	Ludlow, VT	26 GWh	Nov 2018	Jul 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	Jul 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	51 GWh	Nov 2018	Dec 2025	Wood/Wood Waste Solids
Adirondack A+B Community Solar Garden	BWC Connecticut River LLC	Westport, MA	9 GWh	Nov 2018	Dec 2025	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	Jul 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	2 GWh	Sep 2018	Dec 2025	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 2025	Solar
Manchester Community College North	Onyx Asset Services Group	Great Path, CT	885 MWh	Sep 2018	Dec 2025	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 2025	Solar
Trinity College Fuel Cell	Onsite Partners, LLC	Hartford, CT	11 GWh	Jul 2018	Dec 2025	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

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