ISO New England

Balancing Authority Summary Information

ISO New England is ranked #14 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	Jul 2025
Annual Generation	103.8 TWh
Power Plants	1,561
Utilities	814
Ranked #14 out of 65 in terms of net annual generation
Ranked #11 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 57.3% Nuclear \| 24.5% Water \| 5.9% Other Fuel \| 4.5% Wind \| 3.7% Solar \| 1.4% Coal \| 0.3%

Map of ISO New England

Register Now for Comprehensive Access

Subscribe now to access all power plant data, utility information, FERC EQR data, and more for ISO New England.

Create Your Account Today

Daily Net Generation for ISO New England for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Rail Trail	Altus Power America Management, LLC	Great Barrington, MA	3 GWh	Apr 2016	Dec 2024	Solar
Raffia Road Solar Project	NJR Clean Energy Ventures Corporation	Enfield, CT	11 MWh	Nov 2024	Dec 2024	Solar
Raboth - Marion Drive	Madison Energy Holdings LLC	Kingston, MA	5 GWh	Feb 2021	Dec 2024	Solar
Quittacas Pond Solar	Consolidated Edison Solutions Inc.	Rochester, MA	5 GWh	Nov 2013	Dec 2024	Solar
Quinebaug Solar	Quinebaug Solar, LLC	Canterbury, CT	80 GWh	Nov 2021	May 2025	Solar
Quinebaug Lower Project	Quinebaug Associates LLC	Brooklyn, CT	10 GWh	Mar 1990	Dec 2023	Water
Quarry	Nautilus Solar Solutions	North Berwick, ME	10 GWh	Nov 2022	Dec 2024	Solar
Putts Bridge	Central Rivers Power MA, LLC	Ludlow, MA	16 GWh	Dec 1917	Dec 2024	Water
Pumpkin Hill	KEI (Maine) Power Management (II) LLC	Lowell, ME	3 GWh	Feb 1987	Dec 2024	Water
Proctor	Green Mountain Power Corp	Proctor, VT	31 GWh	Jul 1905	Dec 2024	Water
Princeton Wind Farm	Town of Princeton - (MA)	Princeton, MA	4 GWh	Dec 2009	Dec 2024	Wind
Pratt & Whitney	United Technologies	East Hartford, CT	104 GWh	Dec 1991	Apr 2025	Natural Gas
Powder Hill	LSE Delphinus LLC	Enfield, CT	3 GWh	Nov 2020	Dec 2023	Solar
Potter Station 2	Town of Braintree - (MA)	Braintree, MA	23 GWh	Jun 1963	Dec 2024	Natural Gas : 93.9% Distillate Fuel Oil : 6.1%
Pontook Hydro Facility	Pontook Operating LP	Dummer, NH	62 GWh	Nov 1986	Dec 2024	Water
Plympton Main Street Solar, LLC	REA Investments, LLC	Plympton, MA	8 GWh	Nov 2023	Dec 2024	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	1 GWh	May 2018	Dec 2024	Solar
Plymouth Site 1	CleanCapital Holdings	Plympton, MA	7 GWh	Sep 2013	Dec 2024	Solar
Pleasantdale Road Community Solar	Pleasantdale Road Solar, LLC	Rutland, MA	1 GWh	Aug 2017	Dec 2024	Solar
Pleasant Street	Greenbacker Renewable Energy Corporation	Wilton, ME	5 GWh	Nov 2023	Dec 2024	Solar
Platt Hill	LSE Pictor LLC	Winchester, CT	2 GWh	Dec 2021	Dec 2024	Solar
Plainfield Solar 2	Ecos Energy LLC	Plainfield, CT	1 GWh	Mar 2020	Dec 2024	Solar
Plainfield Solar 1	Ecos Energy LLC	Plainfield, CT	1 GWh	Dec 2019	Dec 2024	Solar
Plainfield Renewable Energy LLC	Plainfield Renewable Energy, LLC	Plainfield, CT	247 GWh	Nov 2013	Oct 2024	Wood/Wood Waste Solids : 99.5%
Plainfield Pike	Captona Plainfield Pike Johnston LLC	Johnston, RI	4 GWh	May 2019	Dec 2024	Solar
Plainfield Community Solar LLC	Plainfield Solar LLC	Plainfield, MA	3 GWh	Jan 2019	Dec 2024	Solar
Pittsford	Green Mountain Power Corp	Pittsford, VT	8 GWh	Jan 1914	Dec 2024	Water
Pittsfield Solar (N. Main St)	Maine DG Solar Pittsfield, LLC	Pittsfield, ME	8 GWh	Sep 2023	Dec 2024	Solar
Pittsfield Solar LLC	Pittsfiled Solar LLC	Pittsfield, ME	17 GWh	Nov 2017	Dec 2024	Solar
Pittsfield Hydro	KEI (Maine) Power Management (II) LLC	Burnham, ME	3 GWh	Jun 1986	Dec 2024	Water
Pittsfield Generating LP	Pittsfield Generating Company, LP	Pittsfield, MA	31 GWh	Jun 1990	May 2025	Natural Gas : 94.6% Distillate Fuel Oil : 5.4%
Pittsfield 44 - M&W PV	NSTAR Electric Company	Pittsfield, MA	2 GWh	Jul 2018	Dec 2024	Solar
Pisgah Mountain Wind	Pisgah Mountain, LLC	Clifton, ME	25 GWh	Nov 2016	Dec 2024	Wind
Pine Hill	AEP Onsite Partners, LLC	Johnston, RI	8 GWh	Jul 2020	Dec 2023	Solar
Pike Road Solar (NY)	RPNY Solar 6, LLC	Batavia, NY	2 GWh	Jun 2024	Dec 2024	Solar
Pfizer Groton Plant	Pfizer Inc	Groton, CT	82 GWh	Dec 1947	May 2025	Natural Gas : 94.6% Distillate Fuel Oil : 5.4%
Pfizer Groton Fuel Cell	Groton Fuel Cell 1 LLC	Groton, CT	30 GWh	Sep 2016	Dec 2024	Natural Gas
Peterson Road Solar	Peterson Road Solar, LLC	Palmer, MA	4 GWh	Mar 2017	Dec 2024	Solar
Peterson	Green Mountain Power Corp	Milton, VT	31 GWh	Jan 1948	Dec 2024	Water
Perkins Road Belfast Solar, LLC	REA Investments, LLC	Belfast, ME	9 GWh	May 2021	Dec 2024	Solar
Pepperidge Farm Bloomfield	Pepperidge Farm, Inc.- Bloomfield	Bloomfield, CT	15 GWh	Jul 2008	Dec 2024	Natural Gas
Pepperell Hydro Power Plant	Eagle Creek Renewable Energy, LLC	Pepperell, MA	4 GWh	Dec 1919	May 2025	Water
Pendleton Solar 1	Pendleton Solar 1, LLC	Lockport, NY	8 GWh	Sep 2020	Dec 2024	Solar
Penacook Upper Falls Hydro	Briar-Hydro Associates	Penacook, NH	12 GWh	Nov 1986	Dec 2024	Water
Penacook Lower Falls	Briar-Hydro Associates	Boscawen, NH	17 GWh	Jul 1983	Dec 2024	Water
Pembroke Hydro	Eagle Creek Renewable Energy, LLC	Suncook, NH	7 GWh	Nov 1985	Dec 2024	Water
Pejepscot Hydroelectric Project	Topsham Hydro Partners	Topsham, ME	49 GWh	Oct 1987	Dec 2024	Water
Passadumkeag Windpark LLC	Southern Power Co	Greenbush, ME	133 GWh	Jun 2016	May 2025	Wind
Partridgeville Hybrid CSG	Partridgeville Road Solar 1, LLC	Athol, MA	6 GWh	Dec 2019	Dec 2023	Solar
Partridge Hill Solar Hybrid	AES Distributed Energy	Charlton, MA	3 GWh	Jun 2020	Dec 2024	Solar
Park St	Greenbacker Renewable Energy Corporation	Rutland, VT	2 GWh	Nov 2014	Dec 2024	Solar
Park Solar	Ecos Energy LLC	Woodbridge, CT	866 MWh	Nov 2023	Dec 2024	Solar
Palombo Solar, LLC CSG	38 Degrees North, LLC	Uxbridge, MA	3 GWh	Nov 2017	Dec 2024	Solar
Palombo B Solar, LLC CSG	38 Degrees North, LLC	Uxbridge, MA	2 GWh	Nov 2017	Dec 2024	Solar
Palmyra PV - BD Solar Palmyra LLC	BD Solar Palmyra LLC	Palmyra, ME	8 GWh	May 2022	Dec 2024	Solar
Palmer Landfill	Syncarpha Bondsville, LLC	Palmer, MA	6 GWh	Nov 2016	Dec 2024	Solar
Palmer	AES Distributed Energy	Palmer, MA	6 GWh	Sep 2019	Dec 2024	Solar
Padelford Solar	Consolidated Edison Solutions Inc.	Berkley, MA	3 GWh	Nov 2012	Dec 2024	Solar
Oxford Solar	Citizens Enterprises Corporation	Oxford, MA	6 GWh	Jan 2020	Dec 2024	Solar
Oxford PV - BD Solar Oxford LLC	BD Solar Oxford LLC	Oxford, ME	15 GWh	May 2021	Dec 2024	Solar
Oxford	CVI CleanCapital Solar 6	Oxford, MA	4 GWh	Jun 2014	Dec 2024	Solar
Overlook	Westbound Solar 3, LLC	Westminster, MA	7 GWh	Feb 2023	Dec 2024	Solar
Outer Cape Community Battery	Eversource	Provincetown, MA	42 MWh	Nov 2022	Apr 2025	Electricity used for energy storage
Ottauquechee Hydro	Green Mountain Power Corp	N. Hartland, VT	978 MWh	Mar 1983	Dec 2024	Water
Otis Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	30 GWh	Dec 1984	May 2025	Water
OSG Solar 1 LLC	Navisun LLC	Orange, MA	3 GWh	Jun 2012	Dec 2023	Solar
Orono Hydro Station	Brookfield Black Bear Hydro, LLC	Orono, ME	6 GWh	Dec 2008	Dec 2024	Water
Orono B	Brookfield Black Bear Hydro, LLC	Orono, ME	21 GWh	Oct 2013	Dec 2024	Water
Orange PV	Terraform Arcadia	Orange, MA	3 GWh	Jun 2013	Dec 2024	Solar
Orange County Solar Farm (NY)	Tesla Inc.	Goshen, NY	2 GWh	Apr 2017	Dec 2024	Solar
Open View Solar Farm	Cross Pollination Inc	New Haven, VT	3 GWh	Aug 2013	Dec 2024	Solar
Onyx - Pembroke Landfill Solar	Onyx Asset Services Group	Pembroke, MA	3 GWh	Nov 2017	Dec 2024	Solar
Onyx - Brockton Thatcher Landfill Solar	Onyx Asset Services Group	Brockton, MA	4 GWh	Oct 2017	Dec 2023	Solar
Onset West Community Solar Facility	Kearsarge Onset LLC	Wareham, MA	2 GWh	Mar 2016	Dec 2024	Solar
Onset East Community Solar Facility	Kearsarge Onset LLC	Wareham, MA	2 GWh	Mar 2016	Dec 2024	Solar
Onondaga County- Clearwater	Tesla Inc.	Oswego, NY	3 GWh	Jun 2017	Dec 2024	Solar
Oneida County- DPW	Tesla Inc.	Oriskany, NY	2 GWh	Sep 2017	Dec 2024	Solar
One Patriot	Bloom Energy	Foxborough, MA	16 GWh	Nov 2019	Dec 2024	Natural Gas
Old Wardour Solar	NuGen Capital Management	East Brookfield, MA	7 GWh	Dec 2015	Dec 2024	Solar
Old Middleboro Road Solar	Agilitas Energy, Inc.	Rochester, MA	11 GWh	Dec 2022	Dec 2024	Solar
Old Frontier Solar III	Old Frontier Solar III PV, LLC	South Deerfield, MA	4 GWh	Aug 2022	Dec 2024	Solar
Ocean State Power II	Ocean State Power II	Harrisville, RI	897 GWh	Sep 1991	Dec 2024	Natural Gas : 99.9%
Ocean State Power	Ocean State Power Co	Harrisville, RI	1 TWh	Nov 1990	Dec 2024	Natural Gas : 99.9%
Oakland	Nautilus Solar Solutions	Oakland, ME	9 GWh	Aug 2022	Dec 2024	Solar
Oakfield Wind Project	Onward Energy	City of Oakfield, ME	355 GWh	Sep 2015	May 2025	Wind
Oakdale Power Station	Massachusetts Water Res Auth	West Boylston, MA	2 GWh	Apr 1951	Dec 2024	Water
Oak Street Solar	Citizens Enterprises Corporation	Springfield, MA	6 GWh	Nov 2019	Dec 2024	Solar
Oak Bluffs Diesel Generating Facility	Vineyard Reliability LLC	Oak Bluffs, MA	2 GWh	Dec 1968	Dec 2024	Distillate Fuel Oil
Nutting Ridge Solar, LLC	REA Investments, LLC	Otisfield, ME	6 GWh	May 2023	Dec 2024	Solar
Nutmeg Solar	Nutmeg Solar LLC	Enfield, CT	34 GWh	Nov 2020	Dec 2024	Solar
Nunnepog	Clean Focus Yield, LLC	Edgartown, MA	2 GWh	May 2014	Dec 2024	Solar
Notus Wind 1	Notus Clean Energy LLC	E. Falmouth, MA	4 GWh	Jun 2010	Dec 2024	Wind
Norwich WWTP	City of Norwich - (CT)	Norwich, CT	1 MWh	Apr 2006	Mar 2024	Distillate Fuel Oil
Norton Powerhouse 2	Norton Powerhouse 2	Worcester, MA	29 GWh	Oct 2022	Dec 2024	Natural Gas
Norton LLC	Greenbacker Renewable Energy Corporation	Norton, MA	4 GWh	Aug 2020	Apr 2024	Solar
Norton Landfill Solar	Citizens Enterprises Corporation	Norton, MA	2 GWh	Dec 2016	Dec 2024	Solar
Norton	Madison Energy Holdings LLC	Norton, MA	1 GWh	Feb 2023	Dec 2024	Solar
Northbridge Solar	Consolidated Edison Development Inc.	South Grafton, MA	3 GWh	Jul 2013	Dec 2024	Solar
Northampton Landfill Solar PV	Ameresco Glendale Road Solar PV LLC	Northampton, MA	4 GWh	Oct 2017	Dec 2024	Solar
North Stonington Solar Center, LLC	Adapture Renewables, Inc.	North Stonington, CT	30 GWh	Sep 2022	Dec 2024	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	792.6 GWh	4
#25	Dominion Energy South Carolina, Inc.	25.9 TWh	87
#13	Duke Energy Carolinas	111.8 TWh	565
#17	Duke Energy Progress East	65.1 TWh	558
#52	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.9 TWh	25
#12	New York Independent System Operator	131.0 TWh	1,191
#1	PJM Interconnection, LLC	862.6 TWh	2,429
#29	South Carolina Public Service Authority	19.8 TWh	34
#60	Southeastern Power Administration	1.4 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	188.5 TWh	2,051
#8	Tennessee Valley Authority	159.4 TWh	204
#10	Florida Power & Light Co.	149.1 TWh	187
#12	New York Independent System Operator	131.0 TWh	1,191
#13	Duke Energy Carolinas	111.8 TWh	565
#14	ISO New England	103.8 TWh	1,561
#16	Bonneville Power Administration	80.4 TWh	163
#17	Duke Energy Progress East	65.1 TWh	558
#18	Salt River Project Agricultural Improvement and Power District	59.0 TWh	48
#19	PacifiCorp East	58.2 TWh	215