Tempe sits at the junction of SRP and APS service territories — and in 2026 that split matters more than ever. APS credits solar exports at 6.17¢/kWh locked for 10 years, nearly double SRP's 3.45¢/kWh rate, giving western Tempe homeowners a measurable edge. At $2.17/watt, Tempe installations average $30,031 before incentives, with homeowners saving an average of $47,000 over 25 years. Home to ASU and a city-wide Climate Action Plan, Tempe has one of the highest per-capita solar adoption rates in Arizona.
Avg System Size
11–13 kW
Installed Cost
$2.17/W
Est. Payback
7–8 yrs
Avg Summer Bill
~$310/mo
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location_on Tempe, AZ · 17 yrs exp
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location_on Tempe, AZ · 8 yrs exp
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location_on Tempe, AZ · 17 yrs exp
location_on Tempe, AZ · 16 yrs exp
SRP serves most established residential neighborhoods east of I-10, where battery storage is the smart complement given the lower export credit rate. APS customers in western Tempe and the University Park area benefit from the higher 6.17¢/kWh export credit locked in at interconnection. Tempe's mix of 1960s–1980s ranch homes and newer infill construction means a roof assessment is an important first step — NABCEP-certified installers can advise whether a reroof should be bundled with the solar installation. The city's streamlined permitting process typically adds just 1–2 weeks to project timelines.
APS export rate declines ~10%/yr through 2032 — interconnecting sooner locks in the higher rate.
Full APS customer guidearrow_forwardSRP's low export rate means sizing to 80–90% of usage and adding battery storage maximizes ROI.
Full SRP customer guidearrow_forward