Power plants in Hawaii
Hawaii has 76 power plants of 1 MW or more in the 2025 EIA-860 data, with 3,691 MW of nameplate capacity, the 46th-largest total among the 50 states and DC. Oil and petroleum accounts for 56% of that capacity. The biggest single site is Kahe at 610 MW. Units that came online from 2020 to 2025 add 788 MW, led by battery storage at 58%. Units retired since 2016 at plants still operating total 119 MW, most of it oil-fired.
- Oil and petroleum2,072 MW56%
- Solar578 MW16%
- Battery storage517 MW14%
- Wind233 MW6.3%
- Biomass and waste167 MW4.5%
- Geothermal51 MW1.4%
- Other sources39.1 MW1.1%
- Hydroelectric33.6 MW0.9%
What is running, by the decade it came online
Oil and petroleumHydroelectricWindSolarBattery storageGeothermalBiomass and wasteOther sources
Columns above the line show capacity still operating in 2025, stacked by fuel. Below the line: capacity retired in each decade at plants that still operate.
The 25 largest plants
| Rank | Plant | Runs on | Capacity | First unit | Operator |
|---|---|---|---|---|---|
| 1 | Kahe | Oil and petroleum | 610 MW | 1963 | Hawaiian Electric Co Inc |
| 2 | Waiau | Oil and petroleum | 375 MW | 1959 | Hawaiian Electric Co Inc |
| 3 | Kalaeloa Cogen Plant | Oil and petroleum | 299 MW | 1989 | Kalaeloa Partners LP |
| 4 | Maalaea | Oil and petroleum | 230 MW | 1971 | Maui Electric Co Ltd |
| 5 | Kapolei Energy Storage | Battery storage | 185 MW | 2023 | Kapolei Energy Storage I, LLC |
| 6 | AES Maui Kuihelani Solar Hybrid | Battery storage | 120 MW | 2024 | AES Distributed Energy |
| 7 | Ho’Ohana Solar 1 | Solar | 117 MW | 2025 | Ho’Ohana Solar 1 LLC |
| 8 | Campbell Industrial Park | Oil and petroleum | 113 MW | 2009 | Hawaiian Electric Co Inc |
| 9 | H Power | Biomass and waste | 100 MW | 1989 | Covanta Honolulu Resource Recovery |
| 10 | Port Allen (HI) | Oil and petroleum | 89.5 MW | 1964 | Kauai Island Utility Cooperative |
| 11 | Keahole | Oil and petroleum | 89.1 MW | 1984 | Hawaii Electric Light Co Inc |
| 12 | Mililani South Solar Farm | Battery storage | 78 MW | 2022 | Mililani I Solar LLC |
| 13 | Hale Kuawehi Solar Hybrid | Solar | 74 MW | 2025 | Hale Kuawehi Solar LLC |
| 14 | Waiawa Solar Power Hybrid | Battery storage | 72 MW | 2023 | Waiawa Solar Power LLC |
| 15 | Kawailoa Wind | Wind | 69 MW | 2012 | Kawailoa Wind LLC |
| 16 | Hamakua Energy Plant | Oil and petroleum | 66 MW | 2000 | Hamakua Energy LP |
| 17 | AES Waikoloa Solar Hybrid | Battery storage | 60 MW | 2023 | AES Distributed Energy |
| 18 | Puna Geothermal Venture I | Geothermal | 51 MW | 1992 | Puna Geothermal Venture |
| 19 | Schofield Generating Station | Biomass and waste | 50.4 MW | 2018 | Hawaiian Electric Co Inc |
| 20 | Kawailoa Solar | Solar | 49 MW | 2019 | Kawailoa Solar, LLC |
| 21 | Waipio Solar | Solar | 45.9 MW | 2019 | Waipio PV, LLC |
| 22 | AES Lawai Solar Hybrid | Battery storage | 40 MW | 2018 | AES Distributed Energy |
| 23 | Kapaia Power Station | Other sources | 39.1 MW | 2002 | Kauai Island Utility Cooperative |
| 24 | Puna | Oil and petroleum | 39.1 MW | 1988 | Hawaii Electric Light Co Inc |
| 25 | W H Hill | Oil and petroleum | 37.1 MW | 1965 | Hawaii Electric Light Co Inc |
Largest plant for each main fuel
| Main fuel | Plants | Capacity | Largest plant | Its capacity |
|---|---|---|---|---|
| Oil and petroleum | 19 | 2,072 MW | Kahe | 610 MW |
| Solar | 27 | 461 MW | Ho’Ohana Solar 1 | 117 MW |
| Battery storage | 8 | 608 MW | Kapolei Energy Storage | 185 MW |
| Wind | 8 | 254 MW | Kawailoa Wind | 69 MW |
| Biomass and waste | 4 | 171 MW | H Power | 100 MW |
| Geothermal | 1 | 51 MW | Puna Geothermal Venture I | 51 MW |
| Other sources | 1 | 39.1 MW | Kapaia Power Station | 39.1 MW |
| Hydroelectric | 8 | 34.6 MW | Wailuku River Hydroelectric | 10.4 MW |
Balancing areas
| Area | Plants | Capacity |
|---|---|---|
| Hawaiian Electric | 23 | 894 MW |
Biggest operators here
| Operator | Plants | Capacity |
|---|---|---|
| Hawaiian Electric Co Inc | 6 | 1,178 MW |
| Kalaeloa Partners LP | 1 | 299 MW |
| Maui Electric Co Ltd | 6 | 294 MW |
| AES Distributed Energy | 5 | 273 MW |
| Hawaii Electric Light Co Inc | 7 | 198 MW |
| Kapolei Energy Storage I, LLC | 1 | 185 MW |
| Kauai Island Utility Cooperative | 4 | 153 MW |
| Ho’Ohana Solar 1 LLC | 1 | 117 MW |
| Covanta Honolulu Resource Recovery | 1 | 100 MW |
| Evergreen Wind, LLC | 3 | 91 MW |