How many battery storage projects are planned in ERCOT?

Developers have proposed 857 battery storage projects in ERCOT with 156 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.

What is the largest planned battery storage project in ERCOT?

Zeus Armstrong BESS in Armstrong County, Texas is the largest planned, at 1,043 MW. It is expected to come online in 2028.

Who is developing battery storage projects in ERCOT?

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 battery storage projects in ERCOT

Developers have proposed 857 battery storage projects in ERCOT with 156 GW of capacity, in the grid operators' interconnection queues.

Planned857

See operating battery storage projects in ERCOT

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

More planned battery storage projects in ERCOT are expected online in 2028 than in any other year

153

332

261

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

Planned battery storage projects by the year they're expected online. Source: the grid operators' interconnection queues, compiled by Cleanview.

The 10 largest planned battery storage projects in ERCOT

Planned, by capacity

#	Battery storage project	Location	Expected online	Capacity
1	Zeus Armstrong BESS	Armstrong County, Texas	2028	1,043 MW
2	Zeus Scurry BESS	Scurry County, Texas	2028	1,043 MW
3	Zeus Mitchell BESS	Mitchell County, Texas	2029	1,043 MW
4	Zeus Mitchell BESS II	Mitchell County, Texas	2027	1,043 MW
5	Kickstart Energy Storage VI	Ellis County, Texas	2029	1,026 MW
6	Prairie Point Energy Storage I	Wise County, Texas	2027	1,000 MW
7	Prairie Point Energy Storage II	Wise County, Texas	2027	1,000 MW
8	Kickstart Energy Storage V	Ellis County, Texas	2029	999 MW
9	Nabla Energy Storage I	Parker County, Texas	2029	750 MW
10	Nabla Energy Storage II	Parker County, Texas	2029	750 MW

Planned battery storage projects expected online soonest in ERCOT

In the next 18 months, soonest first

#	Battery storage project	Location	Expected online	Capacity
1	Avalon BESS	Fort Bend County, Texas	2026	522 MW
2	Betel Storage II	Milam County, Texas	2026	500 MW
3	Duffy BESS	Matagorda County, Texas	2026	241 MW
4	Silver Birch BESS	Brazos County, Texas	2026	209 MW
5	Tidwell Prairie II Batt	Robertson County, Texas	2026	204 MW
6	Marcelina Storage	Wilson County, Texas	2026	203 MW
7	Callisto II Energy Center	Harris County, Texas	2026	203 MW
8	Elan BESS	Fort Bend County, Texas	2026	203 MW
9	Cartwheel BESS 1	Hopkins County, Texas	2026	154 MW
10	Backbone Creek BESS	Burnet County, Texas	2026	124 MW

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

How Cleanview tracks battery storage projects

Operating battery storage projects 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 battery storage projects in ERCOT

How many battery storage projects are planned in ERCOT?: Developers have proposed 857 battery storage projects in ERCOT with 156 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.
What is the largest planned battery storage project in ERCOT?: Zeus Armstrong BESS in Armstrong County, Texas is the largest planned, at 1,043 MW. It is expected to come online in 2028.
Who is developing battery storage projects in ERCOT?: 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.