Power Plants in Hawaii
All 76 operable plants · EIA inventory, August 2026.
Capacity by fuel
| Fuel | Capacity | Share | Plants |
|---|---|---|---|
| Other | 2,333 MW | 63.2% | 25 |
| Solar | 884 MW | 23.9% | 34 |
| Wind | 254 MW | 6.9% | 8 |
| Battery storage | 185 MW | 5.0% | 1 |
| Hydro | 35 MW | 0.9% | 8 |
Nameplate capacity — what the fleet could produce running flat out — not what it actually generated. A plant is filed under the fuel carrying most of its capacity. See what Hawaii actually generated →
Largest plants in Hawaii
| # | Plant | Fuel | Capacity | Online |
|---|---|---|---|---|
| 1 | KaheHonolulu County | Other | 610 MW | 1963 |
| 2 | WaiauHonolulu County | Other | 375 MW | 1959 |
| 3 | Kalaeloa Cogen PlantHonolulu County | Other | 299 MW | 1989 |
| 4 | MaalaeaMaui County | Other | 230 MW | 1971 |
| 5 | Kapolei Energy StorageHonolulu County | Battery storage | 185 MW | 2023 |
| 6 | AES Maui Kuihelani Solar HybridMaui County | Solar | 120 MW | 2024 |
| 7 | Ho'Ohana Solar 1Honolulu County | Solar | 117 MW | 2025 |
| 8 | Campbell Industrial ParkHonolulu County | Other | 113 MW | 2009 |
| 9 | H PowerHonolulu County | Other | 100 MW | 1989 |
| 10 | Port Allen (HI)Kauai County | Other | 90 MW | 1964 |
Hawaii's generating fleet in context
Hawaii's generating fleet holds 3,691 MW of nameplate capacity as of August 2026, ranking 46th of the 50 states and DC. The fleet spans 73 plants in service out of 76 total, with capacity divided sharply between a dominant
category at 63.2% and renewables making up the remainder. Solar provides 23.9% across 34 plants, wind accounts for 6.9% from 8 plants, battery storage contributes 5.0% from a single installation, and hydro rounds out the mix at 0.9% from 8 plants.
The largest plants are Kahe at 610 MW, Waiau at 375 MW, and Kalaeloa Cogen Plant at 299 MW, all fueled by the dominant source and located in Honolulu County. Maalaea in Maui County follows at 230 MW, while Kapolei Energy Storage, the state's battery storage facility at 185 MW, rounds out the five largest. The fleet's age spans from Wainiha Hydro, which came online in January 1906, to BRE - Ritz Carlton Kapalua, first operational in December 2025, representing over a century of accumulated capacity.
Written from the EIA figures on this page, covering data through August 2026.
Every plant in Hawaii, by fuel
Other25 plants · 2,333 MW
All US other plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Kahe | Honolulu | 610 MW | 6 | 1963 |
| Waiau | Honolulu | 375 MW | 6 | 1959 |
| Kalaeloa Cogen Plant | Honolulu | 299 MW | 3 | 1989 |
| Maalaea | Maui | 230 MW | 21 | 1971 |
| Campbell Industrial Park | Honolulu | 113 MW | 1 | 2009 |
| H Power | Honolulu | 100 MW | 3 | 1989 |
| Port Allen (HI) | Kauai | 90 MW | 11 | 1964 |
| Keahole | Hawaii | 89 MW | 7 | 1984 |
| Hamakua Energy Plant | Hawaii | 66 MW | 3 | 2000 |
| Puna Geothermal Venture I | Hawaii | 51 MW | 12 | 1992 |
| Schofield Generating Station | Honolulu | 50 MW | 6 | 2018 |
| Kapaia Power Station | Kauai | 39 MW | 1 | 2002 |
| Puna | Hawaii | 39 MW | 2 | 1988 |
| W H Hill | Hawaii | 37 MW | 2 | 1965 |
| Kahului | Maui | 34 MW | 4 | 1948 |
| Kanoelehua | Hawaii | 21 MW | 5 | 1962 |
| Tesoro Hawaii | Honolulu | 20 MW | 1 | 1982 |
| Palaau Power Hybrid | Maui | 17 MW | 11 | 1982 |
| Hawaii Cogen | Honolulu | 12 MW | 4 | 1990 |
| Miki Basin | Maui | 10 MW | 8 | 1990 |
| Biomass to Energy Facility, Kauai | Kauai | 10 MW | 3 | 2014 |
| HNL Emergency Power Facility | Honolulu | 10 MW | 4 | 2017 |
| Waimea | Hawaii | 7.5 MW | 3 | 1970 |
| Hana Substation | Maui | 2.0 MW | 2 | 2001 |
| Kuihelani Substation | Maui | 1.0 MW | 1 | 2023 |
Solar34 plants · 884 MW
All US solar plants →Wind8 plants · 254 MW
All US wind plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Kawailoa Wind | Honolulu | 69 MW | 1 | 2012 |
| Auwahi Wind Energy Hybrid | Maui | 35 MW | 2 | 2012 |
| Kaheawa Wind Power II LLC | Maui | 31 MW | 2 | 2012 |
| Kaheawa Pastures Wind Farm Hybrid | Maui | 30 MW | 1 | 2006 |
| Kahuku Wind Power LLC | Honolulu | 30 MW | 1 | 2011 |
| Na Pua Makani Wind Project | Honolulu | 28 MW | 1 | 2020 |
| Pakini Nui Wind Farm | Hawaii | 21 MW | 1 | 2007 |
| Hawi Wind Farm | Hawaii | 11 MW | 1 | 2006 |
Battery storage1 plant · 185 MW
All US battery storage plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Kapolei Energy Storage | Honolulu | 185 MW | 1 | 2023 |
Hydro8 plants · 35 MW
All US hydro plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Wailuku River Hydroelectric | Hawaii | 10 MW | 2 | 1993 |
| Gay Robinson | Kauai | 8.7 MW | 4 | 1982 |
| Kaheka Hydro | Maui | 4.5 MW | 3 | 1925 |
| Wainiha Hydro | Kauai | 3.6 MW | 2 | 1906 |
| Puueo | Hawaii | 3.1 MW | 2 | 1918 |
| Kalaheo Hydro | Kauai | 2.0 MW | 1 | 2016 |
| Paia Hydroelectric Plant | Maui | 1.3 MW | 1 | 1912 |
| Waiau Hydro | Hawaii | 1.0 MW | 2 | 1921 |
Sorted by nameplate capacity within each fuel. “Online” is the year the plant’s earliest surviving unit entered service.