Cost & Savings Breakdown
Based on $150/month electric bill in Mililani
System Size
3 kW
Annual Production
5,256 kWh
Gross System Cost
$12,000
Federal Tax Credit (30%)
-$3,600
State Incentive
-$5,000
Net Cost
$3,400
Monthly Savings
$132
CO₂ Offset/yr
4,836 lbs
25-Year Savings Projection
Utility & Net Metering
Local UtilityHawaiian Electric
Net Metering PolicyAvoided Cost
Compensation RateAvoided cost rate
Capacity Limit100% of consumption
Electricity Rate$0.301/kWh
Peak Sun Hours6 hrs/day
Available Incentives
30%
Federal ITC — Deduct 30% of your system cost from federal taxes. Available through 2032.
$5,000
Hawaii State Incentive — Hawaii offers a 35% state tax credit up to $5,000.
Common Questions
How much does solar cost in Mililani?
Solar in Mililani, Hawaii costs approximately $12,000 for a 3 kW system. After the 30% federal tax credit, your net cost is about $3,400.
What is the solar payback period in Mililani?
The estimated payback period for solar in Mililani is 2.1 years, based on a $150/month electric bill and local sun hours of 6 hrs/day.
Does Hawaiian Electric offer net metering?
Hawaiian Electric offers Avoided Cost net metering. Avoided cost rate.