Solar Panel Cost in Mililani, HI (2026)
The average solar panel installation in Mililani, HI costs $3.35 per watt, or about $20,100 for a typical 6kW residential system before state and local incentives. Over 25 years, going solar in Mililani can save you an estimated $65,000, with a payback period of around 5 years.
$3.35
Cost per Watt
$20,100
Avg System Cost
5 years
Payback Period
$65,000
25-Year Savings
Solar Panel Costs in Mililani, HI
Average cost per watt: $3.35 | Payback period: 5 years
| System Size | Estimated Cost | Est. 25-Year Savings |
|---|---|---|
| 4 kW | $13,400 | $43,333 |
| 6 kW | $20,100 | $65,000 |
| 8 kW | $26,800 | $86,667 |
| 10 kW | $33,500 | $108,333 |
| 12 kW | $40,200 | $130,000 |
Why Go Solar in Mililani?
Mililani residents currently pay an average of $39.0 cents/kWh for electricity. This is above the national average of 16 cents/kWh, making solar an especially smart investment for homeowners in Mililani.
With an average of 5.5 peak sun hours per day, Mililani receives excellent solar irradiance, supporting strong energy production from your rooftop panels throughout the year.
Hawaii offers net metering, which means Mililani homeowners earn credits on their electricity bill for any excess solar energy sent back to the grid. This can significantly reduce or even eliminate your monthly electricity bill.
Solar Cost FAQs for Mililani, HI
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