Solar ROI Calculator
Accurate analysis for Arizona homeowners using real APS Time-of-Use rates (March 2026)
Solar System Configuration
Customize for your home — all calculations use current APS TOU rates
~24 panels (8000W system)
Without battery: 25-40% typical. With battery: 60-85%. Rest is exported at $$0.076/kWh.
Your Solar ROI
Net Cost
$21,800
Gross: $22,800
Year 1 Savings
$1,448
$121/mo
Payback
12.9 yrs
Within warranty
25-Year ROI
123.9%
$48,821
Year 1 Savings Breakdown
Incentives Applied
The federal solar ITC expired in 2025. Adding a battery qualifies for a separate 30% federal tax credit through 2032 — see the Battery Calculator.
25-Year Cumulative Savings
APS Rates Used: Peak (4-7pm) $0.3439/kWh summer, $0.2145/kWh winter. Off-peak $0.1235/kWh summer, $0.1035/kWh winter. Export: $0.076/kWh net billing.
Assumptions: 6.5 peak sun hours (Phoenix avg), 0.75% annual degradation (AZ heat), 3% annual rate escalation, inverter replacement at year 12.
Learn More About Solar in Arizona
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