How many battery storage projects are in Washington?

2, with 4 MW of nameplate capacity between them, spread over 2 counties. That is the EIA-860M operating count for 2026-07.

Is there a map of Washington battery storage projects?

Yes — the map above. Each dot is one battery storage project, sized by nameplate capacity and placed at the coordinates EIA files for it.

Which is the largest battery storage project in Washington?

Glacier Battery Storage, at 2 MW. The table is sorted largest first, so the rest follow it.

Is there a battery storage project near me in Washington?

The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.

Which grid operator runs Washington's battery storage projects?

No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Washington is largely a vertically integrated utility rather than an organised market.

How current is this, and what is left out?

EIA-860M for 2026-07. EIA technology "Batteries" — grid-connected electrochemical storage of 1 MW and above. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.

Battery Storage Projects in Washington

Every operating battery storage project in Washington on EIA-860M for 2026-07: 2 plants, 3 storage units and 4 MW of nameplate capacity across 2 counties.

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

Plants: 2; 3 generating units
Nameplate capacity: 4 MW
Counties: 2
Grid operator: Mixed; no single ISO covers a majority

Map of battery storage projects in Washington

Every one of the 2 plants is drawn at the coordinate EIA files for it.

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Battery · 2

List of battery storage projects in Washington

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

battery storage projects in Washington

Glacier Battery StorageBatteries	Puget Sound Energy Inc	Whatcom	2	1	2016	Operating
Arlington Microgrid2 technologies	PUD No 1 of Snohomish County - (WA)	Snohomish	1.5	2	2019	Operating

Largest battery storage projects in Washington

1Glacier Battery StorageWhatcom County, Washington2 MW
2Arlington MicrogridSnohomish County, Washington1.5 MW

Battery storage projects by county in Washington

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

County	Plants	Nameplate MW
Whatcom	1	2
Snohomish	1	1.5

Battery Storage Projects in Washington: FAQ

How many battery storage projects are in Washington?: 2, with 4 MW of nameplate capacity between them, spread over 2 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Washington battery storage projects?: Yes — the map above. Each dot is one battery storage project, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest battery storage project in Washington?: Glacier Battery Storage, at 2 MW. The table is sorted largest first, so the rest follow it.
Is there a battery storage project near me in Washington?: The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
Which grid operator runs Washington's battery storage projects?: No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Washington is largely a vertically integrated utility rather than an organised market.
How current is this, and what is left out?: EIA-860M for 2026-07. EIA technology "Batteries" — grid-connected electrochemical storage of 1 MW and above. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.