How many solar farms are in PJM?

PJM has 1,344 operating utility-scale solar farms with 20 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest solar farm in PJM?

Fox Squirrel Solar in Madison County, Ohio is the largest, at 577 MW. It came online in 2023.

How many solar farms were built in PJM in 2025?

167 solar farms came online in PJM in 2025, with 3,096 MW of capacity.

Who is developing solar farms in PJM?

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 PJM

PJM has 1,344 operating solar farms with 20 GW of capacity. 167 came online in 2025.

Operating1,344

See planned solar farms in PJM

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

PJM had 359 solar farms online in 2016 and 1,344 in 2026

359

414

470

533

626

730

802

928

1,094

1,261

1,344

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 PJM

Operating, by capacity

#	Solar farm	Location	Year online	Capacity
1	Fox Squirrel Solar	Madison County, Ohio	2023	577 MW
2	Mammoth North Solar	Starke County, Indiana	2024	400 MW
3	AEUG Union Solar, LLC	Union County, Ohio	2024	325 MW
4	Hecate Energy Highland LLC	Highland County, Ohio	2024	300 MW
5	Yellowbud Solar, LLC	Ross County, Ohio	2023	274 MW
6	Hardin Solar III	Hardin County, Ohio	2025	250 MW
7	Pleinmont Solar 2	Spotsylvania County, Virginia	2021	240 MW
8	Cadence Solar Energy Center	Union County, Ohio	2026	240 MW
9	Hillcrest Solar	Brown County, Ohio	2021	200 MW
10	Riverstart Solar Park LLC	Randolph County, Indiana	2021	200 MW

Solar farms that came online most recently in PJM

Newest first

#	Solar farm	Location	Year online	Capacity
1	Mark Center Solar Project	Defiance County, Ohio	2026	94 MW
2	Green Acres PA	Clearfield County, Pennsylvania	2026	20 MW
3	Copenhagen Ct	Cook County, Illinois	2026	4 MW
4	Prologis - SLCNJ001 - Community Solar	Middlesex County, New Jersey	2026	3 MW
5	MDD109-NCBP BLDG 11-Manekin	Prince Georges County, Maryland	2026	2 MW
6	OER IL - Groundhog	McHenry County, Illinois	2026	2 MW
7	Mountain Point- Sharptown	Wicomico County, Maryland	2026	2 MW
8	Northlake 3-SLCHI303	Cook County, Illinois	2026	2 MW
9	NCBP TWELVE, LLC	Prince Georges County, Maryland	2026	1 MW
10	Morgnec Solar	Kent County, Maryland	2026	56 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 PJM

How many solar farms are in PJM?: PJM has 1,344 operating utility-scale solar farms with 20 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest solar farm in PJM?: Fox Squirrel Solar in Madison County, Ohio is the largest, at 577 MW. It came online in 2023.
How many solar farms were built in PJM in 2025?: 167 solar farms came online in PJM in 2025, with 3,096 MW of capacity.
Who is developing solar farms in PJM?: 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.