Short answer: In Arizona, residential solar is priced by system size. A typical home needs a 6 to 10 kW system, and most installs land in the low-to-mid five figures before credits. The federal 30% credit ended after 2025, but the Arizona state credit (up to $1,000) still applies. Treat any online figure as a range, not a quote.
Cost scales with system size
Solar is priced by capacity, measured in kilowatts. A typical Arizona home needs somewhere in the range of a 6 to 10 kilowatt system to cover most of its usage, and most residential installs land in the low-to-mid five figures before any credits. We are giving you a range on purpose: a small, efficient home with a simple roof sits at the low end, while a large all-electric home with a complex roof and a battery sits well above it.
These are illustrative ranges to set expectations, not a quote. Your price comes from a real look at your roof and usage.
What moves the price
- System size is the single biggest factor. More usage to offset means more panels.
- Equipment tier matters: higher-efficiency panels and premium inverters cost more, but can mean fewer panels or better hot-weather performance.
- Roof complexity adds labor. Steep pitch, multiple planes, height, or required electrical upgrades all push the number up.
- Battery storage is a meaningful line item, and whether it pays off depends on your utility and goals. See solar plus battery in Arizona.
- Roof condition counts. If your roof needs repair or replacement first, that is a separate, real cost worth handling up front.
How credits change the net in 2026
Two credit facts shape the net cost, and one of them changed this year. The 30% federal residential credit ended on December 31, 2025, so an owned system bought in 2026 no longer gets it; the full story is on the federal solar tax credit page. The Arizona state credit still applies, worth 25% of the device cost up to a $1,000 lifetime cap. We build your number on the 2026 reality, not an outdated 30%.
The number that matters more than price
Focusing only on the sticker price misses the point. The other half of the math is the utility power you stop buying at a rate that keeps rising. Over the life of a well-sized system, those avoided APS or SRP bills usually outweigh the upfront cost, which is why payback, not the headline price, is the figure to watch. See the rate increases you would be getting off of, then run your bill through the savings calculator.