How many solar farms are planned in CAISO?

Developers have proposed 228 solar farms in CAISO with 73 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.

What is the largest planned solar farm in CAISO?

Atlas Complex in La Paz County, Arizona is the largest planned, at 2,256 MW. It is expected to come online in 2028.

Who is developing solar farms in CAISO?

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.

Planned solar farms in CAISO

Developers have proposed 228 solar farms in CAISO with 73 GW of capacity, in the grid operators' interconnection queues.

Planned228

See operating solar farms in CAISO

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

More planned solar farms in CAISO are expected online in 2029 than in any other year

2026’262027’272028’282029’292030’302031’312032’322033’33

Planned solar farms by the year they're expected online. Source: the grid operators' interconnection queues, compiled by Cleanview.

The 10 largest planned solar farms in CAISO

Planned, by capacity

#	Solar farm	Location	Expected online	Capacity
1	Atlas Complex	La Paz County, Arizona	2028	2,256 MW
2	Sanborn Hybrid 3	Kern County, California	2026	1,420 MW
3	Wingtip Solar 1	Merced County, California	2032	1,176 MW
4	Boson	Kern County, California	2028	1,173 MW
5	Muon	Fresno County, California	2028	1,170 MW
6	Angeleno Solar Farm	Los Angeles County, California	2028	1,150 MW
7	Darden	Fresno County, California	2027	1,150 MW
8	Umbriel	Imperial County, California	2033	1,150 MW
9	Plum	Kings County, California	2031	1,040 MW
10	Stanley	Maricopa County, Arizona	2030	1,039 MW

Planned solar farms expected online soonest in CAISO

In the next 18 months, soonest first

#	Solar farm	Location	Expected online	Capacity
1	Sanborn Hybrid 3	Kern County, California	2026	1,420 MW
2	Sonrisa	Fresno County, California	2026	200 MW
3	Aratina Solar Center 2	Kern County, California	2026	150 MW
4	Gaskell West	Kern County, California	2026	125 MW
5	Huaso Hybrid	Fresno County, California	2026	102 MW
6	Chalan Solar	Kern County, California	2026	65 MW
7	Sunshine Valley Solar 1	Nye County, Nevada	2026	50 MW
8	Pluot	Kings County, California	2027	246 MW
9	Sienna Solar Farm	San Bernardino County, California	2027	200 MW
10	Jasmine	Kern County, California	2027	71 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 CAISO

How many solar farms are planned in CAISO?: Developers have proposed 228 solar farms in CAISO with 73 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.
What is the largest planned solar farm in CAISO?: Atlas Complex in La Paz County, Arizona is the largest planned, at 2,256 MW. It is expected to come online in 2028.
Who is developing solar farms in CAISO?: 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.