SunPowerPeek

Arizona vs Hawaii Solar Comparison

Arizona gets more sun (6.5 hrs/day) while Hawaii has the faster payback (4.8 years).Hawaii offers higher 20-year savings at $72,400.

Arizona

6.5 hrs

6.8yr payback

$42,500

20yr savings

Hawaii

5.5 hrs

4.8yr payback

$72,400

20yr savings

Side-by-Side Comparison

MetricArizonaHawaii
Peak Sun Hours6.5 hrs5.5 hrs
Cost per Watt$2.70$3.50
6kW System Cost$16,200$21,000
Federal Tax Credit30%30%
State Tax Credit25%35%
State Rebate$1,000$5,000
Net MeteringFull Net MeteringFull Net Metering
Electricity Rate14.78¢/kWh43.18¢/kWh
Payback Period6.8 years4.8 years
20-Year Savings$42,500$72,400

Verdict

Hawaii is the better state for solar ROI with $72,400 in 20-year savings and a 4.8-year payback period. Arizona has more sun exposure at 6.5 hrs/day, making it ideal for maximum energy production. Both states qualify for the 30% federal solar tax credit.

Frequently Asked Questions

Is solar better in Arizona or Hawaii?

Arizona gets more sun (6.5 peak hours/day vs 5.5). Hawaii has a faster payback (4.8 years) and Hawaii offers higher 20-year savings ($72,400).

How do solar costs compare between Arizona and Hawaii?

A 6kW system costs $16,200 in Arizona vs $21,000 in Hawaii before incentives. Both qualify for the 30% federal tax credit.

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Data verified March 2026 · Source: NREL, DSIRE, EIA