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
Pejepscot Hydroelectric Project	Topsham Hydro Partners	Topsham, ME	50 GWh	Oct 1987	Dec 2025	Water
Pembroke Hydro	Eagle Creek Renewable Energy, LLC	Suncook, NH	7 GWh	Nov 1985	Dec 2025	Water
Penacook Lower Falls	Briar-Hydro Associates	Boscawen, NH	16 GWh	Jul 1983	Dec 2025	Water
Penacook Upper Falls Hydro	Briar-Hydro Associates	Penacook, NH	11 GWh	Nov 1986	Dec 2025	Water
Pendleton Solar 1	Pendleton Solar 1, LLC	Lockport, NY	7 GWh	Sep 2020	Dec 2025	Solar
Penobscot Narrows Solar I	Penobscot Narrows Solar I LLC	Bucksport, ME	7 GWh	May 2024	Dec 2025	Solar
Pepperell Hydro Power Plant	Eagle Creek Renewable Energy, LLC	Pepperell, MA	2 GWh	Dec 1919	Jul 2026	Water
Pepperidge Farm Bloomfield	Pepperidge Farm, Inc.- Bloomfield	Bloomfield, CT	15 GWh	Jul 2008	Dec 2024	Natural Gas
Perkins Road Belfast Solar, LLC	REA Investments, LLC	Belfast, ME	9 GWh	May 2021	Dec 2025	Solar
Peru (MA)	Sunrise on West Main Rd. LLC	Peru, MA	4 GWh	Oct 2020	Dec 2025	Solar
Peterson	Green Mountain Power Corp	Milton, VT	25 GWh	Jan 1948	Dec 2025	Water
Peterson Road Solar	Peterson Road Solar, LLC	Palmer, MA	4 GWh	Mar 2017	Dec 2025	Solar
Pfizer Groton Fuel Cell	Groton Fuel Cell 1 LLC	Groton, CT	36 GWh	Sep 2016	Dec 2025	Natural Gas
Pfizer Groton Plant	Pfizer Inc	Groton, CT	79 GWh	Dec 1947	Jul 2026	Natural Gas : 89.1% Distillate Fuel Oil : 10.9%
Pike Road Solar (NY)	RPNY Solar 6, LLC	Batavia, NY	5 GWh	Jun 2024	Dec 2025	Solar
Pine Hill	Onsite Partners, LLC	Johnston, RI	8 GWh	Jul 2020	Dec 2025	Solar
Pine Hill Westport	Greenbacker Renewable Energy Corporation	Westport, MA	3 GWh	May 2025	Dec 2025	Solar
Pisgah Mountain Wind	Pisgah Mountain, LLC	Clifton, ME	28 GWh	Nov 2016	Dec 2025	Wind
Pittsfield 44 - M&W PV	NSTAR Electric Company	Pittsfield, MA	2 GWh	Jul 2018	Dec 2025	Solar
Pittsfield Generating LP	Pittsfield Generating Company, LP	Pittsfield, MA	64 GWh	Jun 1990	Jul 2026	Natural Gas : 93.3% Distillate Fuel Oil : 6.7%
Pittsfield Hydro	KEI (Maine) Power Management (II) LLC	Burnham, ME	3 GWh	Jun 1986	Dec 2025	Water
Pittsfield Solar LLC	Pittsfiled Solar LLC	Pittsfield, ME	15 GWh	Nov 2017	Dec 2025	Solar
Pittsfield Solar (N. Main St)	Maine DG Solar Pittsfield, LLC	Pittsfield, ME	8 GWh	Sep 2023	Dec 2025	Solar
Pittsford	Green Mountain Power Corp	Pittsford, VT	8 GWh	Jan 1914	Dec 2025	Water
Plainfield Community Solar LLC	Plainfield Solar LLC	Plainfield, MA	3 GWh	Jan 2019	Dec 2025	Solar
Plainfield Pike	Captona Plainfield Pike Johnston LLC	Johnston, RI	4 GWh	May 2019	Dec 2025	Solar
Plainfield Renewable Energy LLC	Plainfield Renewable Energy, LLC	Plainfield, CT	245 GWh	Nov 2013	Dec 2025	Wood/Wood Waste Solids : 99.3% Other Biomass Liquids : 0.7%
Plainfield Solar 1	Ecos Energy LLC	Plainfield, CT	2 GWh	Dec 2019	Dec 2025	Solar
Plainfield Solar 2	Ecos Energy LLC	Plainfield, CT	2 GWh	Mar 2020	Dec 2025	Solar
Platt Hill	LSE Pictor LLC	Winchester, CT	3 GWh	Dec 2021	Dec 2025	Solar
Pleasant Street	Greenbacker Renewable Energy Corporation	Wilton, ME	5 GWh	Nov 2023	Dec 2025	Solar
Pleasantdale Road Community Solar	Pleasantdale Road Solar, LLC	Rutland, MA	1 GWh	Aug 2017	Dec 2025	Solar
Plymouth Site 1	CleanCapital Holdings	Plympton, MA	7 GWh	Sep 2013	Dec 2025	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	2 GWh	May 2018	Dec 2025	Solar
Plympton Lake Street Solar	REA Investments, LLC	Plympton, MA	2 GWh	Nov 2022	Dec 2025	Solar
Plympton Main Street Solar, LLC	REA Investments, LLC	Plympton, MA	7 GWh	Nov 2023	Dec 2025	Solar
Pomham Islander (CSG)	Nautilus Solar Solutions	North Smithfield, RI	1 GWh	Jun 2025	Dec 2025	Solar
Pontook Hydro Facility	Pontook Operating LP	Dummer, NH	51 GWh	Nov 1986	Dec 2025	Water
Potter Station 2	Town of Braintree - (MA)	Braintree, MA	41 GWh	Jun 1963	Dec 2025	Natural Gas : 61.2% Distillate Fuel Oil : 38.8%
Powder Hill	LSE Delphinus LLC	Enfield, CT	3 GWh	Nov 2020	Dec 2025	Solar
Pratt & Whitney	United Technologies	East Hartford, CT	96 GWh	Dec 1991	Jul 2026	Natural Gas
Princeton Wind Farm	Town of Princeton - (MA)	Princeton, MA	4 GWh	Dec 2009	Dec 2025	Wind
Proctor	Green Mountain Power Corp	Proctor, VT	28 GWh	Jul 1905	Dec 2025	Water
Pulpit Hill	LSE Fornax LLC	Amherst, MA	7 GWh	Jun 2019	Dec 2025	Solar
Pumpkin Hill	KEI (Maine) Power Management (II) LLC	Lowell, ME	3 GWh	Feb 1987	Dec 2025	Water
Putts Bridge	Central Rivers Power MA, LLC	Ludlow, MA	11 GWh	Dec 1917	Dec 2025	Water
Quarry	Nautilus Solar Solutions	North Berwick, ME	10 GWh	Nov 2022	Dec 2025	Solar
Quinebaug Lower Project	Quinebaug Associates LLC	Brooklyn, CT	5 GWh	Mar 1990	Dec 2025	Water
Quinebaug Solar	Quinebaug Solar, LLC	Canterbury, CT	76 GWh	Nov 2021	Jul 2026	Solar
Quittacas Pond Solar	RWE Clean Energy	Rochester, MA	5 GWh	Nov 2013	Dec 2025	Solar
Raboth - Marion Drive	Madison Energy Holdings LLC	Kingston, MA	4 GWh	Feb 2021	Dec 2025	Solar
Raffia Road Solar Project	NJR Clean Energy Ventures Corporation	Enfield, CT	7 GWh	Nov 2024	Dec 2025	Solar
Rail Trail	Altus Power America Management, LLC	Great Barrington, MA	3 GWh	Apr 2016	Dec 2025	Solar
Rainbow (CT)	Farmington River Power Company	Windsor, CT	19 GWh	Nov 1925	Jul 2026	Water
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	132 GWh	Mar 2005	Jul 2026	Natural Gas
Randall Road Solar I	Green Street Power Partners	Ballston Spa, NY	5 GWh	Jun 2024	Dec 2025	Solar
Randall Road Solar II	Green Street Power Partners	Ballston Spa, NY	3 GWh	Jun 2024	Dec 2025	Solar
Randall Solar Project Hybrid	AES Distributed Energy	Berlin, MA	9 GWh	Jun 2021	Dec 2025	Solar
Randolph	Altus Power America Management, LLC	Randolph, MA	6 GWh	Oct 2017	Dec 2025	Solar
Ravenbrook	Captona Ravenbrook LLC	Carver, MA	6 GWh	Nov 2013	Dec 2025	Solar
Record Hill Wind	Record Hill Wind LLC	Roxbury, ME	110 GWh	Dec 2011	Dec 2025	Wind
Redbrook Community Solar 1	Redbrook Solar 1, LLC	Plympton, MA	1 GWh	Sep 2017	Dec 2025	Solar
Redman North Community Solar	AES Distributed Energy	Brockport, NY	106 MWh	Jan 2022	Dec 2025	Solar
Redman South Community Solar	AES Distributed Energy	Brockport, NY	8 GWh	Jan 2022	Jun 2025	Solar
ReEnergy Livermore Falls	ReEnergy Livermore Falls	Livermore Falls, ME	274 GWh	Jul 1992	Dec 2025	Wood/Wood Waste Solids
ReEnergy Stratton LLC	ReEnergy Stratton LLC	Stratton, ME	200 GWh	Oct 1989	Dec 2025	Wood/Wood Waste Solids
Regional Waste Systems	Ecomaine	Portland, ME	87 GWh	May 1988	Jul 2026	Non-biogenic Municipal Solid Waste : 54.6% Biogenic Municipal Solid Waste : 44.7% Natural Gas : 0.7%
Rehoboth Solar	Citizens Enterprises Corporation	Rehoboth, MA	3 GWh	Nov 2013	Dec 2025	Solar
Renew Canal 1 CSG LLC	NRG Renew Canal 1 LLC	Sandwich, MA	2 GWh	May 2017	Dec 2025	Solar
RGS-Rutland VNM SREC II Project (MA)	TerraForm Solar XVII, LLC	Rutland, MA	3 GWh	Oct 2015	Dec 2025	Solar
Rhode Island Hospital	Rhode Island Hospital	Providence, RI	40 GWh	Sep 1974	Jul 2026	Natural Gas : 83.2% Residual Fuel Oil : 16.8%
Rhode Island Solar Renewable Energy IV,	Rhode Island Solar Renewable Energy IV, LLC	Tiverton, RI	18 GWh	Nov 2023	Dec 2025	Solar
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	3 TWh	Sep 2002	Jul 2026	Natural Gas
Richmond Hill	Greenbacker Renewable Energy Corporation	Richmond, ME	3 GWh	Nov 2023	Dec 2025	Solar
Richmond NMCA	AES Distributed Energy	Wood River Junction, RI	6 GWh	Nov 2018	Jul 2026	Solar
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	4 GWh	Jul 2005	Dec 2025	Landfill Gas
Ring Road	Greenbacker Renewable Energy Corporation	Plympton, MA	2 GWh	May 2025	Dec 2025	Solar
Rising Paper	Altus Power America Management, LLC	Great Barrington, MA	3 GWh	Apr 2016	Dec 2025	Solar
River Road	Norridgewock River Road Solar, LLC	Norridgewock, ME	8 GWh	Feb 2022	Dec 2025	Solar
Riverside Holyoke	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	22 GWh	Dec 1905	Dec 2025	Water
Robin Hollow Solar	Robin Hollow Solar, LLC	West Greenwich, RI	71 GWh	Nov 2023	Jul 2026	Solar
Rochester MA 2	Rochester MA 2 LLC	Rochester, MA	1 GWh	Nov 2018	Dec 2025	Solar
Rockland Solar CSG	MN8 Energy LLC	Rockland, MA	2 GWh	Nov 2013	Dec 2025	Solar
Roger Williams - Melville at Portsmouth	Luminace Solar Rhode Island, LLC	Portsmouth, RI	5 GWh	Feb 2021	Dec 2025	Solar
Rolfe Canal Hydro	Briar-Hydro Associates	Penacook, NH	16 GWh	Nov 1987	Dec 2025	Water
Rollins Wind Project	Evergreen Wind, LLC	Winn Village, ME	147 GWh	Jun 2011	Dec 2025	Wind
Rollinsford	Green Mountain Power Corp	Rollinsford, NH	3 GWh	Sep 1986	Dec 2025	Water
Roosevelt Trail	Madison Energy Investments LLC	Windham, ME	1 GWh	Nov 2024	Dec 2025	Solar
Rounseville Solar	Rounseville Solar 1, LLC	Rochester, MA	4 GWh	Jan 2020	Dec 2025	Solar
Route 3 China Solar, LLC	REA Investments, LLC	China, ME	8 GWh	Nov 2022	Dec 2025	Solar
Route 57 Solar	Citizens Enterprises Corporation	Agawam, MA	2 GWh	Feb 2013	Dec 2025	Solar
Rowe (CSG)	AES Distributed Energy	Olean, NY	8 GWh	Oct 2021	Dec 2025	Solar
RoxWind	RoxWind LLC	Roxbury, ME	44 GWh	Oct 2021	Dec 2025	Wind
RT405 Westerlo Solar 2	RT405 Westerlo Solar 2, LLC	Albany, NY	8 GWh	Feb 2020	Dec 2025	Solar
Rumford Cogeneration	ND Paper, Inc.	Rumford, ME	401 GWh	Dec 1989	Jul 2026	Black Liquor : 54.2% Tire-derived Fuels : 20.8% Wood/Wood Waste Solids : 16.7% Bituminous Coal : 6.0% Residual Fuel Oil : 1.1% Natural Gas : 0.6% Sludge Waste : 0.6%
Rumford Falls Hydro Facility	Brookfield Power New England	Rumford, ME	212 GWh	Dec 1917	Dec 2025	Water
Rumford Power LLC	Rumford Power	Rumford, ME	793 GWh	Jun 2000	Dec 2025	Natural Gas
Russell (MA)	Sunrise on Blandford Rd. LLC	Russell, MA	5 GWh	Oct 2020	Dec 2025	Solar
Ryan Road Solar LLC Hybrid(CSG)	AES Distributed Energy	North Brookfield, MA	10 GWh	Nov 2021	Dec 2025	Solar
Ryans Ranch	Nautilus Solar Solutions	Paris, ME	5 GWh	May 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