15th largest plant in Hawaii · 3243rd nationally
Hamakua Energy Plant is a oil power plant in Hawaii with a nameplate capacity of 66.0 MW. It generates roughly 267.4k MWh per year — enough to power about 25,465 average U.S. homes.
Its capacity factor of 46% puts it in the middle range — running steadily but not full-time. At 965 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (66.0 MW nameplate × hours in the month). Filled bars are actual net generation reported to EIA Form 923. The gap between them is capacity factor made visible.
| Plant Name | Hamakua Energy Plant |
|---|---|
| Operator | Hamakua Energy Lp |
| City | Honokaa |
| County | Hawaii County |
| State | Hawaii |
| ZIP | 96727 |
| Coordinates | 20.09390, -155.47110 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| CT1 | Petroleum Liquids | WO | 23.0 MW | Operating | 2000 |
| CT2 | Petroleum Liquids | WO | 23.0 MW | Operating | 2000 |
| ST1 | Petroleum Liquids | WO | 20.0 MW | Operating | 2000 |
| CO₂ | 129.0k metric tons |
|---|---|
| SO₂ | 75 metric tons |
| NOₓ | 621 metric tons |
| CO₂ Rate | 965 lb/MWh |
Annual totals and CO₂ rate reported by EPA eGRID for 2023. Reference averages are approximate U.S.-wide figures from the same dataset.
Oil-fired plants typically run only during peak demand or grid emergencies because oil is expensive compared to gas and coal. They have the highest CO₂ emissions per MWh of any common generation technology.