12th largest plant in Hawaii · 2915th nationally
Mililani South Solar Farm is a solar power plant in Hawaii with a nameplate capacity of 78.0 MW. It generates roughly 68.2k MWh per year — enough to power about 6,497 average U.S. homes.
Its capacity factor of 10% reflects intermittent or peaking operation.
| Plant Name | Mililani South Solar Farm |
|---|---|
| Operator | Mililani I Solar Llc |
| City | Mililani |
| County | Honolulu County |
| State | Hawaii |
| ZIP | 96789 |
| Coordinates | 21.42792, -158.01985 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | Solar | 39.0 MW | Operating | 2022 |
| 2 | Batteries | Battery | 39.0 MW | Operating | 2022 |
Utility-scale solar farms convert sunlight directly into electricity using photovoltaic panels. They produce zero direct emissions and have no fuel cost, but generation is variable — peaking at midday and falling to zero at night. Capacity factors typically run 18–28% in good locations.