How many planned battery storage projects are in CAISO?

There are 407 planned battery storage projects in CAISO.

What is the total planned battery storage capacity in CAISO?

The total planned battery storage capacity in CAISO is 121,287 MW.

What is the largest planned battery storage project in CAISO?

The largest planned battery storage project in CAISO is Atlas Complex at 2,171 MW, located in La Paz, Arizona.

How many developers have planned battery storage projects in CAISO?

There are 43 unique developers with planned battery storage projects in CAISO.

Planned Battery Storage Projects in CAISO

Explore the largest battery storage projects expected to come online in CAISO and see all proposed battery storage projects on a map.

Last updated: August 2026

On this page, you can explore our database of planned battery storage projects in CAISO. Each month, we track projects in development and update our list of the largest battery storage projects expected to come online in CAISO.

As of August 2026, there are 407 battery storage projects in development in CAISO, according to Cleanview's project tracker. Their total planned capacity is 121,287 MW. See also: operating battery storage projects in CAISO→

Planned Projects

407

Planned Capacity

121,287 MW

Unique Developers

Largest Planned Battery Storage Projects in CAISO

Atlas Complex

2,171 MW

Expected Online: October 2027

Location: La Paz, Arizona

Developer: Hanwha Group

Wingtip Solar 1

1,176 MW

Expected Online: September 2032

Location: Merced, California

Quark

1,175 MW

Expected Online: September 2028

Location: Fresno, California

Boson

1,173 MW

Expected Online: September 2028

Location: Kern, California

Muon

1,170 MW

Expected Online: September 2028

Location: Fresno County, California

Pion

1,168 MW

Expected Online: December 2028

Location: Fresno, California

Angeleno Solar Farm

1,150 MW

Expected Online: December 2028

Location: Los Angeles, California

Darden

1,150 MW

Expected Online: July 2027

Location: Fresno, California

Developer: Intersect Power

Umbriel

1,150 MW

Expected Online: September 2033

Location: Imperial, California

Battery Storage Projects Coming Online Soon in CAISO

Harquahala Sunrise 2

161 MW

Expected Online: September 2026

Location: Maricopa, Arizona

Developer: Copia Power

Key Storage 1

300 MW

Expected Online: October 2026

Location: Fresno, California

Developer: NextEra Energy

Wright Solar

80 MW

Expected Online: October 2026

Location: Merced, California

Developer: Peninsula Clean Energy

Baldy Mesa 2

75 MW

Expected Online: November 2026

Location: San Bernardino, California