How many solar farms are in Massachusetts?

Massachusetts has 558 operating utility-scale solar farms with 1.5 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest solar farm in Massachusetts?

SJA Solar LLC-Solterra Monastery CSG in Worcester County, Massachusetts is the largest, at 15 MW. It came online in 2016.

How many solar farms were built in Massachusetts in 2025?

14 solar farms came online in Massachusetts in 2025, with 44 MW of capacity.

Who is developing solar farms in Massachusetts?

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 Massachusetts

Massachusetts has 558 operating solar farms with 1.5 GW of capacity. 14 came online in 2025.

Operating558

See planned solar farms in Massachusetts

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

Massachusetts had 201 solar farms online in 2016 and 558 in 2026

201

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557

558

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 Massachusetts

Operating, by capacity

#	Solar farm	County	Year online	Capacity
1	SJA Solar LLC-Solterra Monastery CSG	Worcester County	2016	15 MW
2	Barrett PV	Worcester County	2016	12 MW
3	NL MA - Copicut	Bristol County	2025	8 MW
4	Stony Brook	Hampden County	2018	7 MW
5	Worcester Landfill	Worcester County	2017	7 MW
6	Dartmouth	Bristol County	2014	6 MW
7	East Acres Solar NG, LLC	Berkshire County	2017	6 MW
8	Old Wardour Solar	Worcester County	2016	6 MW
9	Vuelta Solar	Worcester County	2016	6 MW
10	Mass Midstate Solar 2	Worcester County	2014	5 MW

Solar farms that came online most recently in Massachusetts

Newest first

#	Solar farm	County	Year online	Capacity
1	Rose Solar	Hampshire County	2026	4 MW
2	Oak Leaf Solar XVII Community Solar	Berkshire County	2025	3 MW
3	Stanley Black & Decker	Hampden County	2025	3 MW
4	Milk Street Solar, LLC	Worcester County	2025	3 MW
5	Oak Leaf Solar XVI Community Solar	Berkshire County	2025	1 MW
6	TJA MA Wakeby Road	Barnstable County	2025	5 MW
7	NL MA - Division	Bristol County	2025	1 MW
8	GSPP Worcester Business Center, LLC	Worcester County	2025	2 MW
9	NL MA - Copicut	Bristol County	2025	8 MW
10	Upland	Plymouth County	2025	5 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 Massachusetts

How many solar farms are in Massachusetts?: Massachusetts has 558 operating utility-scale solar farms with 1.5 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest solar farm in Massachusetts?: SJA Solar LLC-Solterra Monastery CSG in Worcester County, Massachusetts is the largest, at 15 MW. It came online in 2016.
How many solar farms were built in Massachusetts in 2025?: 14 solar farms came online in Massachusetts in 2025, with 44 MW of capacity.
Who is developing solar farms in Massachusetts?: 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.