Nameplate capacity
610 MW
Rank in Hawaii
#1
of 76 plants
In service since
1963
March 1963
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- Hawaiian Electric Co Inc
- County
- Honolulu County
- Generating units
- 6
- Share of state capacity
- 16.52%
- Rank among other plants in Hawaii
- #1 of 25
- EIA plant code
- 765
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| K5 | Petroleum Liquids | 135 MW | 128 MW | 1974 | Operating |
| K6 | Petroleum Liquids | 135 MW | 129 MW | 1981 | Operating |
| K4 | Petroleum Liquids | 91 MW | 87 MW | 1972 | Operating |
| K3 | Petroleum Liquids | 86 MW | 82 MW | 1970 | Operating |
| K1 | Petroleum Liquids | 82 MW | 78 MW | 1963 | Operating |
| K2 | Petroleum Liquids | 82 MW | 78 MW | 1964 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Hawaii
| Waiau | Other | 375 MW |
| Kalaeloa Cogen Plant | Other | 299 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 610 MW solar plant and a 610 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Hawaii power plants · What Hawaii actually generates