How many battery storage projects are in Hawaii?

Hawaii 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 Hawaii?

Kapolei Energy Storage in Honolulu County, Hawaii is the largest, at 185 MW. It came online in 2023.

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

2 battery storage projects came online in Hawaii in 2025, with 82 MW of capacity.

Who is developing battery storage projects in Hawaii?

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 Hawaii

Hawaii has 16 operating battery storage projects with 0.5 GW of capacity. 2 came online in 2025.

Operating16

See planned battery storage projects in Hawaii

Updated monthly. Last updated October 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated October 2026.

Hawaii had 2 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 Hawaii

Operating, by capacity

#	Battery storage project	County	Year online	Capacity
1	Kapolei Energy Storage	Honolulu County	2023	185 MW
2	AES Maui Kuihelani Solar Hybrid	Maui County	2024	60 MW
3	Ho'Ohana Solar 1	Honolulu County	2025	52 MW
4	Mililani South Solar Farm	Honolulu County	2022	39 MW
5	Waiawa Solar Power Hybrid	Honolulu County	2023	36 MW
6	Hale Kuawehi Solar Hybrid	Hawaii County	2025	30 MW
7	AES Waikoloa Solar Hybrid	Hawaii County	2023	30 MW
8	AES Lawai Solar Hybrid	Kauai County	2018	20 MW
9	AES Kekaha Solar, LLC Hybrid	Kauai County	2021	14 MW
10	KIUC Kapaia PV and BA Storage Project Hy	Kauai County	2017	13 MW

Battery storage projects that came online most recently in Hawaii

Newest first

#	Battery storage project	County	Year online	Capacity
1	Ho'Ohana Solar 1	Honolulu County	2025	52 MW
2	Hale Kuawehi Solar Hybrid	Hawaii County	2025	30 MW
3	AES Maui Kuihelani Solar Hybrid	Maui County	2024	60 MW
4	AES West Oahu Solar Hybrid	Honolulu County	2024	13 MW
5	Kapolei Energy Storage	Honolulu County	2023	185 MW
6	AES Waikoloa Solar Hybrid	Hawaii County	2023	30 MW
7	Waiawa Solar Power Hybrid	Honolulu County	2023	36 MW
8	Mililani South Solar Farm	Honolulu County	2022	39 MW
9	Mauna Loa Macadamia Nut	Hawaii County	2021	1 MW
10	BYU - Hawaii	Honolulu County	2021	2 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 Hawaii

How many battery storage projects are in Hawaii?: Hawaii 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 Hawaii?: Kapolei Energy Storage in Honolulu County, Hawaii is the largest, at 185 MW. It came online in 2023.
How many battery storage projects were built in Hawaii in 2025?: 2 battery storage projects came online in Hawaii in 2025, with 82 MW of capacity.
Who is developing battery storage projects in Hawaii?: 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.