Solar in Tempe, AZ: 2026 Cost, Savings & Payback
Calculate 2026 solar panel cost, payback, and 25-year bill savings in Tempe, Arizona. Based on 6.9 peak sun hours/day, 13.5¢/kWh average electricity rate, Arizona Public Service utility context, and current IRS guidance for the ended federal residential clean energy credit.
Solar in Tempe, AZ: quick answer
A typical 6kW solar system in Tempe costs about $15,660 before local or state incentives. For 2026 installs, the federal residential clean energy credit is modeled as $0, so the estimated cost remains about $15,660 before any local incentive. It produces about 12,089 kWh per year from 6.9 peak sun hours/day, saves about $1,628 per year, and reaches payback in about 9.6 years.
2026 6kW Cost
$15,660
Monthly Savings
$136
Production / kW
2,015 kWh
Panel Count
~15
6.9
Peak Sun Hours/Day
13.5¢
Avg Rate (¢/kWh)
9.6 yr
Payback Period
$49k
25-Year Savings
Tempe Solar Overview
Calculate Your Tempe Solar Savings
Tempe average: $130/mo
South-facing roofs produce the most energy
Add $8,000-$12,000 for whole-home battery backup
Annual Production
kWh/year
Annual Savings
per year
Net System Cost
after 2026 federal credit
Payback Period
break-even time
Bill Offset and Export Assumptions
Current Annual Bill
$1,560
Estimated Usage
11,581 kWh
Bill Offset
92%
Used On Site
96%
Exported production is discounted in this planning model instead of being treated as a guaranteed one-for-one bill credit. For Tempe, verify the current Arizona Public Service export-credit method and any fixed monthly charges before relying on the payback number.
25-Year Total Savings
$49,016
Monthly Savings
$120
2026 Federal Credit
$0
Cumulative Savings vs System Cost
Cost Breakdown
| Item | Tempe | National Avg |
|---|---|---|
| Gross System Cost (6kW) | $15,660 | $17,100 |
| 2026 Federal Residential Credit | -$0 | $0 |
| Net System Cost | $15,660 | $17,100 |
| Cost Per Watt | $2.61/W | $2.85/W |
Solar Potential in Tempe
Sun Hours vs National Average
Tempe gets 53% more sun than the national average.
Climate Advantages
- 262 sunny days per year
- Average temperature: 65°F — moderate climate with good solar conditions
- Average roof size: 1,865 sq ft — enough for a 103-panel system
Tempe Solar Incentives & Programs
Federal Investment Tax Credit (ITC)
For 2026 planning, JouleIO does not subtract a federal residential clean energy credit. The IRS says the Residential Clean Energy Credit was 30% for eligible property installed from 2022 through December 31, 2025, and is not available for property placed in service after December 31, 2025.
Source: IRS Residential Clean Energy Credit and IRS One Big Beautiful Bill provisions.
Arizona State Incentives
Arizona solar tax credit up to $1,000; property tax exemption for solar
Net Metering — Arizona Public Service
Arizona Public Service offers net metering in Tempe. Earn credits for excess solar energy sent to the grid, reducing your electric bill further.
Environmental Impact in Tempe
5.0
Tons CO2 Offset/Year
83
Equivalent Trees Planted
1.1
Homes Worth of Energy
Based on 12,089 kWh annual production with a 6kW system. EPA average: 0.417 metric tons CO2 per MWh, 10,632 kWh per US home.
Solar Energy in Tempe, Arizona
Tempe, Arizona receives an average of 6.9 peak sun hours per day, placing it among the best cities in the country for solar energy production. With electricity rates averaging 13.5¢ per kWh from Arizona Public Service, below the national average, but with rates rising 2-3% annually, the long-term savings are still meaningful.
A typical 6kW solar system in Tempe produces approximately 12,089 kWh per year, saving homeowners an estimated $1,435 annually. The system pays for itself in about 10.9 years, after which you enjoy essentially free electricity for the remaining 14+ years of the system's warranty life.
Tempe has a solar penetration rate of 8.4% — showing growing adoption of residential solar, with significant room for expansion. The cost of living index of 94 (national average: 100) reflects a lower cost of living, keeping installation costs competitive.
Other Cities in Arizona
Chandler, AZ
Gilbert, AZ
Glendale, AZ
Mesa, AZ
Peoria, AZ
Phoenix, AZ
Scottsdale, AZ
Surprise, AZ
Tucson, AZ
Methodology & Solar Data Sources for Tempe
How we calculate Tempe solar potential and savings: Solar production estimates use NREL's PVWatts calculator methodology, applied to Tempe's specific solar irradiance (peak sun hours), tilt angle, and azimuth. Cost figures combine NREL's Annual Technology Baseline for system pricing, ENERGY STAR's database for residential PV averages, and EIA Form 861 utility rate data for Arizona.
- Solar irradiance for Tempe: based on NREL National Solar Radiation Database (NSRDB) — 30-year average peak sun hours per day.
- System sizing assumes residential rooftop installation with standard 350-400W panels, calibrated to typical Tempe household electricity usage.
- Federal tax credit: modeled as 0% for 2026 residential installations because IRS guidance says the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025.
- Net metering assumes 1:1 retail-rate compensation typical in Arizona (verify with local utility — some have shifted to net billing or avoided-cost rates).
- System lifetime standard 25 years with annual degradation of 0.5%/year per industry warranty norms.
Authoritative US solar data sources:
- NREL PVWatts Calculator — official US solar production estimator
- NREL National Solar Radiation Database — 30-year solar irradiance data
- IRS Residential Clean Energy Credit — 2026 federal residential credit status
- IRS One Big Beautiful Bill provisions — clean energy credit expiration overview
- DSIRE — State Solar Incentives — searchable database for Arizona
- EIA Electric Power Monthly — Arizona utility rate data
- ENERGY STAR Solar — efficient solar product database
Solar Disclaimer: Solar savings vary based on roof orientation, shading, system quality, installer markup, financing terms, utility rate plan, and policy changes. Always get 3+ quotes from NABCEP-certified installers and review contracts carefully. Tax credit eligibility depends on tax liability — consult a tax professional.
Reviewed by Brazora Monk · Last updated 2026 · NREL irradiance data per NSRDB latest release
Frequently Asked Questions
How much do solar panels cost in Tempe, AZ?
The average cost of a 6kW solar panel system in Tempe is approximately $15,660 before local or state incentives ($2.61/watt). For 2026 planning, this calculator does not subtract a federal residential clean energy credit because IRS guidance says the credit is not available for property placed in service after December 31, 2025. Arizona solar tax credit up to $1,000; property tax exemption for solar
How many solar panels do I need in Tempe, AZ?
A typical 6kW residential solar system in Tempe needs about 15 panels if each panel is rated near 400 watts. That system produces about 12,089 kWh per year in this estimate, or roughly 2,015 kWh per installed kW before shading, roof orientation, and inverter losses are customized.
How many peak sun hours does Tempe get?
Tempe, AZ receives an average of 6.9 peak sun hours per day and approximately 262 sunny days per year. This is above the national average of 4.5 hours, making it an excellent location for solar energy.
What is the solar payback period in Tempe?
The average solar payback period in Tempe is approximately 9.6 years for a 6kW cash-price estimate before local or state incentives. After payback, your solar panels generate essentially free electricity for the remaining warranty life. Over 25 years, bill savings can reach about $55,609 before subtracting installation cost.
Does Tempe have net metering?
Yes, Tempe has access to net metering through Arizona Public Service. This allows you to earn credits for excess solar energy sent to the grid, but the final savings depend on the current utility tariff and fixed monthly charges.
Is solar worth it in Tempe, AZ in 2026?
Yes. With a 9.6-year estimated payback and about $55,609 in 25-year bill savings before installation cost, solar can be an attractive investment in Tempe. For 2026 installs, JouleIO does not assume a federal residential credit; local incentives and net metering are the main financial drivers.