How many battery storage projects are in Hawaii?

8, with 608 MW of nameplate capacity between them, spread over 4 counties. That is the EIA-860M operating count for 2026-07.

Is there a map of Hawaii 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 Hawaii?

Kapolei Energy Storage, at 185 MW. The table is sorted largest first, so the rest follow it.

Is there a battery storage project near me in Hawaii?

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 Hawaii's battery storage projects?

No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Hawaii 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 Hawaii

Every operating battery storage project in Hawaii on EIA-860M for 2026-07: 8 plants, 15 storage units and 608 MW of nameplate capacity across 4 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: 8; 15 generating units
Nameplate capacity: 608 MW
Counties: 4
Grid operator: Mixed; no single ISO covers a majority

Map of battery storage projects in Hawaii

Every one of the 8 plants is drawn at the coordinate EIA files for it.

Loading map…

Battery · 8

List of battery storage projects in Hawaii

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

battery storage projects in Hawaii

Kapolei Energy StorageBatteries	Kapolei Energy Storage I, LLC	Honolulu	185	1	2023	Operating
AES Maui Kuihelani Solar Hybrid2 technologies	AES Distributed Energy	Maui	120	2	2024	Operating
Mililani South Solar Farm2 technologies	Mililani I Solar LLC	Honolulu	78	2	2022	Operating
Waiawa Solar Power Hybrid2 technologies	Waiawa Solar Power LLC	Honolulu	72	2	2023	Operating
AES Waikoloa Solar Hybrid2 technologies	AES Distributed Energy	Hawaii	60	2	2023	Operating
AES Lawai Solar Hybrid2 technologies	AES Distributed Energy	Kauai	40	2	2018	Operating
AES Kekaha Solar, LLC Hybrid2 technologies	AES Distributed Energy	Kauai	28	2	2019	Operating
AES West Oahu Solar Hybrid2 technologies	AES Distributed Energy	Honolulu	25	2	2024	Operating

Largest battery storage projects in Hawaii

1Kapolei Energy StorageHonolulu County, Hawaii185 MW
2AES Maui Kuihelani Solar HybridMaui County, Hawaii120 MW
3Mililani South Solar FarmHonolulu County, Hawaii78 MW
4Waiawa Solar Power HybridHonolulu County, Hawaii72 MW
5AES Waikoloa Solar HybridHawaii County, Hawaii60 MW
6AES Lawai Solar HybridKauai County, Hawaii40 MW
7AES Kekaha Solar, LLC HybridKauai County, Hawaii28 MW
8AES West Oahu Solar HybridHonolulu County, Hawaii25 MW

Battery storage projects by county in Hawaii

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

County	Plants	Nameplate MW
Honolulu	4	360
Maui	1	120
Kauai	2	68
Hawaii	1	60

Battery Storage Projects in Hawaii: FAQ

How many battery storage projects are in Hawaii?: 8, with 608 MW of nameplate capacity between them, spread over 4 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Hawaii 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 Hawaii?: Kapolei Energy Storage, at 185 MW. The table is sorted largest first, so the rest follow it.
Is there a battery storage project near me in Hawaii?: 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 Hawaii's battery storage projects?: No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Hawaii 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.