How many solar farms are in ISO-NE?

ISO-NE has 1,013 operating utility-scale solar farms with 3.8 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest solar farm in ISO-NE?

Gravel Pit Solar, LLC in Hartford County, Connecticut is the largest, at 120 MW. It came online in 2025.

How many solar farms were built in ISO-NE in 2025?

45 solar farms came online in ISO-NE in 2025, with 289 MW of capacity.

Who is developing solar farms in ISO-NE?

Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

Solar farms in ISO-NE

ISO-NE has 1,013 operating solar farms with 3.8 GW of capacity. 45 came online in 2025.

Operating1,013

See planned solar farms in ISO-NE

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

ISO-NE had 251 solar farms online in 2016 and 1,013 in 2026

251

369

443

499

578

692

785

858

961

1,006

1,013

2016’162017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

Solar farms online at the end of each year. Source: EIA-860M, compiled by Cleanview.

The 10 largest solar farms in ISO-NE

Operating, by capacity

#	Solar farm	Location	Year online	Capacity
1	Gravel Pit Solar, LLC	Hartford County, Connecticut	2025	120 MW
2	Three Corners Solar	Waldo County, Maine	2024	110 MW
3	Farmington Solar	Franklin County, Maine	2021	77 MW
4	Sanford Solar	York County, Maine	2020	49 MW
5	Quinebaug Solar	Windham County, Connecticut	2021	49 MW
6	Robin Hollow Solar	Kent County, Rhode Island	2023	41 MW
7	Dry Bridge Solar (Brown University)	Washington County, Rhode Island	2023	40 MW
8	DWW Solar ll	Hartford County, Connecticut	2019	37 MW
9	University Solar, LLC	Kent County, Rhode Island	2019	24 MW
10	Fusion Solar Center LLC	New London County, Connecticut	2018	20 MW

Solar farms that came online most recently in ISO-NE

Newest first

#	Solar farm	Location	Year online	Capacity
1	Kearsarge Grissom	Sullivan County, New Hampshire	2026	4 MW
2	Mansfield Landfill	Tolland County, Connecticut	2026	2 MW
3	Eureka South Solar	Oneida County, New York	2026	5 MW
4	Eureka North Solar	Oneida County, New York	2026	4 MW
5	Stafford Solar One	Tolland County, Connecticut	2026	4 MW
6	Rose Solar	Hampshire County, Massachusetts	2026	4 MW
7	Woodstock Solar One	Windham County, Connecticut	2026	3 MW
8	North Franklin Solar	New London County, Connecticut	2025	5 MW
9	WSD Coventry	Kent County, Rhode Island	2025	5 MW
10	GSPP 1450 Curtiss Rd, LLC	Oneida County, New York	2025	4 MW

The developer behind each project is on paid plans. See plans

How Cleanview tracks solar farms

Operating solar farms come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about solar farms in ISO-NE

How many solar farms are in ISO-NE?: ISO-NE has 1,013 operating utility-scale solar farms with 3.8 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest solar farm in ISO-NE?: Gravel Pit Solar, LLC in Hartford County, Connecticut is the largest, at 120 MW. It came online in 2025.
How many solar farms were built in ISO-NE in 2025?: 45 solar farms came online in ISO-NE in 2025, with 289 MW of capacity.
Who is developing solar farms in ISO-NE?: Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.