How many battery storage projects are in SPP?

SPP has 16 operating utility-scale battery storage projects with 0.5 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest battery storage project in SPP?

Skeleton Creek Energy Center Hybrid in Garfield County, Oklahoma is the largest, at 252 MW. It came online in 2025.

How many battery storage projects were built in SPP in 2025?

4 battery storage projects came online in SPP in 2025, with 422 MW of capacity.

Who is developing battery storage projects in SPP?

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.

Battery storage projects in SPP

SPP has 16 operating battery storage projects with 0.5 GW of capacity. 4 came online in 2025.

Operating16

See planned battery storage projects in SPP

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

SPP had 1 battery storage projects online in 2016 and 16 in 2026

2016’162017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

Battery storage projects online at the end of each year. Source: EIA-860M, compiled by Cleanview.

The 10 largest battery storage projects in SPP

Operating, by capacity

#	Battery storage project	Location	Year online	Capacity
1	Skeleton Creek Energy Center Hybrid	Garfield County, Oklahoma	2025	252 MW
2	Breckinridge Energy Storage	Garfield County, Oklahoma	2025	65 MW
3	Minco II Energy Storage	Grady County, Oklahoma	2025	65 MW
4	Woodward Energy Storage	Woodward County, Oklahoma	2025	40 MW
5	Cunningham Solar I & BESS	Lea County, New Mexico	2026	36 MW
6	Rush Springs Energy Storage (BA)	Grady County, Oklahoma	2020	10 MW
7	Noland Wastewater Treatment Plant Hybrid	Washington County, Arkansas	2019	6 MW
8	Westside Wastewater Treatment Plant Hybr	Washington County, Arkansas	2019	6 MW
9	2nd & N BESS	Lancaster County, Nebraska	2026	3 MW
10	Hampton Substation Energy Storage	Franklin County, Iowa	2022	2 MW

Battery storage projects that came online most recently in SPP

Newest first

#	Battery storage project	Location	Year online	Capacity
1	2nd & N BESS	Lancaster County, Nebraska	2026	3 MW
2	Cunningham Solar I & BESS	Lea County, New Mexico	2026	36 MW
3	Skeleton Creek Energy Center Hybrid	Garfield County, Oklahoma	2025	252 MW
4	Breckinridge Energy Storage	Garfield County, Oklahoma	2025	65 MW
5	Minco II Energy Storage	Grady County, Oklahoma	2025	65 MW
6	Woodward Energy Storage	Woodward County, Oklahoma	2025	40 MW
7	BRIGHT Battery	Cass County, Nebraska	2023	1 MW
8	Hampton Substation Energy Storage	Franklin County, Iowa	2022	2 MW
9	Burt County Solar Hybrid	Burt County, Nebraska	2021	1 MW
10	Dodge County Solar Hybrid	Dodge County, Nebraska	2021	1 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 SPP

How many battery storage projects are in SPP?: SPP has 16 operating utility-scale battery storage projects with 0.5 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest battery storage project in SPP?: Skeleton Creek Energy Center Hybrid in Garfield County, Oklahoma is the largest, at 252 MW. It came online in 2025.
How many battery storage projects were built in SPP in 2025?: 4 battery storage projects came online in SPP in 2025, with 422 MW of capacity.
Who is developing battery storage projects in SPP?: 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.