How many peak sun hours does Honolulu, HI get?

Honolulu, HI averages approximately 5.81 peak sun hours per day based on Open-Meteo historical satellite data.

What is the average electricity rate in Honolulu, HI?

The average residential electricity rate in Honolulu, HI is approximately $0.328 per kWh (EIA data).

Is solar worth it in Honolulu, HI?

Based on 5.81 peak sun hours and $0.328/kWh rates, a typical 6kW system in Honolulu, HI has an estimated payback of 2.4 years and a 25-year NPV of approximately $58,579.

5.81 Peak Sun Hrs $0.328/kWh Hawaii

Solar Calculator — Honolulu, HI

Adjust system size and cost. Location data: 5.81 peak sun hours/day, $0.328/kWh average rate.

Data last updated: July 25, 2026

Solar ROI Calculator

Assumes 5.81 peak sun hours, $0.328/kWh, 80% derating, 0.5% annual degradation, 2.5% utility escalation, 4% discount rate. Federal ITC 30% + 35% state applied.

Key Assumptions

Peak Sun Hours (daily avg)	5.81 hrs
Avg. Electricity Rate	$0.328/kWh
Federal Tax Credit	30%
State Tax Credit	35% (Hawaii)
System Derating	80% (temp, inverter, soiling)
Annual Degradation	0.5%
Utility Escalation	2.5%/year
Discount Rate	4%

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