How many battery storage projects are planned in Oklahoma?

2, for 550 MW of nameplate capacity. These are generators developers have reported to EIA, not generators that exist.

What do the status letters mean?

EIA files each planned generator under a status: regulatory approvals pending, under construction at or below half complete, under construction more than half complete, construction complete but not yet in commercial operation, or planned but not yet started. Each row shows its own.

Do these projects always get built?

No. EIA keeps a separate Canceled or Postponed sheet, and projects move between the sheets month to month. This page is the Planned sheet for 2026-07 and nothing more.

Planned battery storage projects in Oklahoma

What EIA-860M's Planned sheet says is coming in Oklahoma: 2 battery storage projects totalling 550 MW, each with the in-service year its developer reported and the construction status EIA records. A planned project is not a built one.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Planned projects: 2; 3 generating units
Proposed capacity: 550 MW
Earliest in-service year: 2027
Latest in-service year: 2029

Map of planned battery storage projects in Oklahoma

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List of planned battery storage projects in Oklahoma

Planned battery storage projects in Oklahoma

Solstice Solar LLC2 technologies	Clenera DevCo LLC	Le Flore	400	2	2029	Planned for installation
Mammoth Plains Energy StorageBatteries	Mammoth Plains Energy Storage, LLC	Dewey	150	1	2027	Planned for installation

Where they are in the build

Planned for installation2

Planned battery storage projects in Oklahoma: FAQ

How many battery storage projects are planned in Oklahoma?: 2, for 550 MW of nameplate capacity. These are generators developers have reported to EIA, not generators that exist.
What do the status letters mean?: EIA files each planned generator under a status: regulatory approvals pending, under construction at or below half complete, under construction more than half complete, construction complete but not yet in commercial operation, or planned but not yet started. Each row shows its own.
Do these projects always get built?: No. EIA keeps a separate Canceled or Postponed sheet, and projects move between the sheets month to month. This page is the Planned sheet for 2026-07 and nothing more.