How many peak sun hours does Phoenix, AZ get?

Phoenix, AZ averages approximately 5.62 peak sun hours per day based on Open-Meteo historical satellite data.

What is the average electricity rate in Phoenix, AZ?

The average residential electricity rate in Phoenix, AZ is approximately $0.145 per kWh (EIA data).

Is solar worth it in Phoenix, AZ?

Based on 5.62 peak sun hours and $0.145/kWh rates, a typical 6kW system in Phoenix, AZ has an estimated payback of 5.7 years and a 25-year NPV of approximately $20,413.

5.62 Peak Sun Hrs $0.145/kWh Arizona

Solar Calculator — Phoenix, AZ

Adjust system size and cost. Location data: 5.62 peak sun hours/day, $0.145/kWh average rate.

Data last updated: July 25, 2026

Solar ROI Calculator

Assumes 5.62 peak sun hours, $0.145/kWh, 80% derating, 0.5% annual degradation, 2.5% utility escalation, 4% discount rate. Federal ITC 30% + 25% state applied.

Key Assumptions

Peak Sun Hours (daily avg)	5.62 hrs
Avg. Electricity Rate	$0.145/kWh
Federal Tax Credit	30%
State Tax Credit	25% (Arizona)
System Derating	80% (temp, inverter, soiling)
Annual Degradation	0.5%
Utility Escalation	2.5%/year
Discount Rate	4%

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