Data approachEIA rates · NREL sun hours · 2026 federal policy · methodology
A 10 kW solar system in Arizona costs about $23,000 installed in 2026 (roughly $2.30 per watt), saves about $1,800 in the first year and has a simple payback of about 12–13 years. The 30% federal residential credit ended for systems installed after Dec 31, 2025, but Arizona’s 25% state credit (capped at $1,000 per residence) and its solar sales- and property-tax exemptions still apply.
Cost: about $2.30/W, or ~$23,000 for 10 kW. EnergySage’s Arizona average was $2.17–$2.30/W in July 2026.
Federal credit: gone for homeowner systems installed after Dec 31, 2025.
State credit: 25% of cost up to $1,000 per residence, claimed on Arizona Form 310.
Payback: ~12.8 years simple (~12.2 after the state credit) in the model; faster at higher electric rates.
Biggest swing factor: how much solar power you use at home versus export at the reduced APS/TEP export credit.
Arizona has one of the strongest solar resources in the country, and long air-conditioning seasons that line up with solar output. What holds returns back is the electricity price: recent EIA-based state averages for 2026 have run roughly 13–16 cents per kWh depending on the month, compared with about 18 cents nationally. Utilities also credit exported solar well below the retail rate.
This guide covers what a system costs, what it saves, which incentives remain, how APS, TEP and SRP treat exported power, and how to compare installers.
💰 System Cost
How Much Do Solar Panels Cost in Arizona in 2026?
A 10 kW Arizona system costs about $23,000 at $2.30 per watt, with no federal credit subtracted. That base case follows EnergySage marketplace data, which put the Arizona average at $2.17–$2.30 per watt in July 2026 snapshots. Quotes vary by roof, equipment and installer, so the table shows three price scenarios.
Scenario (10 kW)
Price per watt
Installed cost
After $1,000 AZ credit
Simple payback after state credit (13.2¢/kWh)
Marketplace low end
$2.20
$22,000
$21,000
~11.7 years
Base case
$2.30
$23,000
$22,000
~12.2 years
Higher single-installer quote
$3.00
$30,000
$29,000
~16.1 years
Assumptions: 19,450 kWh/yr production, 13.2¢/kWh, 0.70 bill-offset factor, year-1 savings ~$1,798; no federal credit; state credit assumes you have enough Arizona tax liability to use it (unused credit can carry forward).
Data visualization
Same 10 kW system, different net cost. A $23,000 system nets about $15,100 after the 2025 federal credit ($6,900) and $1,000 Arizona credit, versus about $22,000 in 2026 with the Arizona credit only. Source: IRS, Arizona DOR via DSIRE, GreenEnergyCalc model 2026.
Chart summary: On the same $23,000 price, a system installed in 2025 would have cost about $15,100 after the 30% federal credit ($6,900) and the $1,000 Arizona credit. The same system installed in 2026 nets about $22,000 after the Arizona credit alone, roughly $6,900 more. Real 2026 prices may differ from 2025 prices, so treat this as a like-for-like illustration of the credit’s value.
Heat matters. Panel output falls as cell temperature rises, and a panel with a lower temperature coefficient holds more of its rated output on a hot Phoenix roof. Datasheet coefficients commonly fall around −0.26% to −0.35% per °C, so ask every installer to list the figure next to panel efficiency.
Sizing. At about 6.5 peak sun hours, each kW produces roughly 1,945 kWh a year in the model, so a home using 15,000 kWh a year needs about 7.7 kW and one using 19,000 kWh needs about 10 kW. The model household uses about 1,600 kWh a month, which is above the Arizona average, so use the solar system size calculator with your own 12-month usage before requesting quotes. Oversizing is costly when exports earn a reduced rate.
📈 Savings & Payback
Arizona Solar Savings and Payback
A 10 kW Arizona system saves about $1,798 in year one, pays back in about 12.8 years at $23,000 (about 12.2 years after the state credit) and nets about $38,300 over 25 years in the model.
Input
Value
System size
10.0 kW (about 25 × 400 W panels)
Annual production
~19,450 kWh (10 kW × 6.5 sun hours × 365 days × 0.82 system factor)
Retail rate (model assumption)
13.2¢/kWh
Bill-offset factor
0.70 (blends self-use at retail with exports at a lower credit)
Source: GreenEnergyCalc standard model; see methodology. The 13.2¢ rate, 3% escalation and 0.70 offset are modeling assumptions, not guarantees.
Data visualization
Break-even near year 12. Cumulative net cash position of a $23,000, 10 kW Arizona system (19,450 kWh/yr, 13.2 cents per kWh, 0.70 offset, 3 percent yearly rate escalation, 0.5 percent degradation) reaches about +$38,300 by year 25. Source: GreenEnergyCalc model, EIA rates, no federal credit 2026.
Chart summary: The line starts at −$23,000 (the purchase) and crosses zero around year 12. By year 25 the model shows about +$38,300 without the state credit and about +$39,300 with it. Crossing zero before year 13 reflects the model’s 3% yearly electricity-rate escalation, which is why it is a little earlier than the 12.8-year simple payback. If rates rise more slowly, or your system produces less, breakeven moves later.
Without solar, this household’s bills would total about $93,200 over 25 years (a $213 average monthly bill rising 3% a year). With solar, remaining bills would be about $31,900, which is the gap the system closes.
Data visualization
Payback runs 9.9 to 16.1 years. Simple payback after the $1,000 Arizona credit for a 10 kW system at three prices and two electricity rates (net cost divided by year-1 savings of $1,798 or $2,124). Source: GreenEnergyCalc model, EnergySage pricing, EIA rate data 2026.
Chart summary: Payback ranges from about 9.9 years (a $22,000 system at 15.6¢/kWh) to about 16.1 years (a $30,000 system at 13.2¢/kWh). The base case is 12.2 years. Both price and rate move the answer by several years, which is why quotes and your actual utility rate plan matter more than any state average.
Export credits are the main drag. Arizona regulators replaced retail net metering with a lower export rate, the Resource Comparison Proxy (RCP), for APS and TEP customers. Recent published figures for new applicants run around 5–6 cents per kWh (TEP’s 2025–26 rate is about 5.1¢; APS’s is about 6¢ per third-party summaries), the Arizona Corporation Commission limits annual reductions to 10%, and each customer’s rate is locked for 10 years from the interconnection request. SRP, which is not regulated by the ACC, sets its own plans, and some of its export plans credit well under 5¢ per kWh. Rates change each year, so confirm the current tariff with your utility. See TEP’s RCP page for an official example.
Homeowners who use more solar at home during the day (pre-cooling the house, running pool pumps and appliances at midday) capture more retail-rate value. Compare other states with our payback period by state guide, and model your utility’s export rate with the solar savings calculator.
🏛️ Incentives
Which Arizona Solar Incentives and Tax Credits Remain in 2026?
Arizona’s state incentives remain; the federal homeowner credit does not. The Residential Clean Energy Credit (§25D), worth 30% of system cost, ended for expenditures after Dec 31, 2025, under the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). Installation had to be completed by that date, as the IRS FAQs on the OBBB changes explain.
Incentive
Status in 2026
Value on a $23,000, 10 kW system
Federal §25D residential credit (30%)
Ended for installs after Dec 31, 2025
$0
Arizona Residential Solar Energy Credit
Available: 25% of cost, capped at $1,000 per residence (cumulative)
Up to $1,000
State sales-tax exemption on solar equipment
Available
Confirm no sales tax is charged on your quote
Property-tax exemption for solar
Available
Added system value is not assessed
Utility export credit (APS/TEP)
Below-retail RCP export rate
Reflected in the 0.70 offset
Not tax advice. Confirm your federal and Arizona tax situation with a tax professional.
How the Arizona credit works. It reduces your Arizona income tax; it is not a rebate or an upfront discount. Claim it on Arizona Form 310 with the state return for the year of installation. The $1,000 limit is cumulative for the same residence, and excess credit can carry forward for up to five years. Because the cap is $1,000, the credit is a flat $1,000 for any system costing $4,000 or more.
Who can still use federal credits:
2025 installations and carryforwards: Systems completed in 2025 are claimed on the 2025 return (Form 5695, filed in 2026), and unused §25D credit from earlier years can carry forward.
Leases and PPAs: The installer that owns the system may still claim the §48E business credit if the project began construction by July 4, 2026 or is placed in service by Dec 31, 2027. Any savings reach you only through the contract price.
Businesses and farms: Business-owned solar may qualify for §48E on the same deadlines. Rural businesses and agricultural producers can apply for USDA REAP grants when funding rounds open. Ask your tax advisor about depreciation, as the rules changed in 2025.
Nonprofits, schools and governments: Tax-exempt organizations can use elective (“direct”) pay under §6417 for qualifying §48E projects.
Other federal changes. Homeowner-owned batteries installed in 2026 get no federal credit, the §25C efficiency credit for heat pumps ended after 2025, and the new and used EV credits ended for vehicles acquired after Sep 30, 2025. State-run IRA Home Energy Rebates (HEAR/HOMES) were not repealed, but availability depends on Arizona’s program and remaining funds, so check with the Arizona energy office. You can browse other programs on DSIRE.
📋 Financing
Solar Financing Options for Arizona Homeowners
Cash gives the best return in 2026. A loan can cost more per month than the system saves in the early years, and a lease or PPA works only if the contract price beats what you pay now. Without the 30% credit, there is no longer a large federal tax refund to pay down a loan in year two.
Cash purchase: You keep every dollar of savings and the $1,000 state credit. In the model, a $23,000 system pays back in about 12.8 years and nets about $38,300 over 25 years.
Solar loan (example only): A $23,000 loan at 7% over 12 years costs about $237 a month (about $178 over 20 years). Year-one savings average about $150 a month, so monthly cash flow is negative at the start in this example. Your actual rate may differ, so get written loan terms. Avoid products built around a 30% “tax credit paydown” balloon payment, because that credit no longer applies.
Lease or PPA: A third-party owner may use the §48E business credit and can price some of that value into your contract, but no discount is guaranteed. Compare the per-kWh rate with your current rate, check the annual escalator (commonly a few percent a year) and understand the transfer terms if you sell the home.
If you also drive an EV, charging from solar during the day raises self-consumption, which is worth more than exporting under Arizona’s export rates. Use the solar loan calculator to compare loan payments with your expected monthly savings before you sign.
Is a battery worth it? Often only on time-of-use or demand plans, where shifting solar into the evening peak avoids expensive power. Installed batteries commonly add roughly $10,000–$16,000 to a project, and homeowner-owned batteries installed in 2026 get no federal credit. For backup-only use, treat a battery as a resilience purchase rather than an investment.
🔧 Installer Tips
How to Choose a Solar Installer in Arizona
Pick a licensed installer that gives you an itemized, 2026-accurate quote with a verifiable production estimate. Get at least three bids and compare them on price per watt, equipment and warranty terms.
Before signing, confirm that:
The installer holds a valid Arizona Registrar of Contractors (ROC) license, plus insurance and bonding.
The proposal lists exact panel and inverter model numbers, not just brand names, and the panel temperature coefficient.
Product and workmanship warranties are stated separately.
The installer handles permits and utility interconnection with APS, TEP or SRP.
The savings estimate uses your utility’s current export rate and does not subtract a 30% federal credit for a 2026 installation.
Ask each bidder for a production estimate based on NREL PVWatts or equivalent modeling for your roof’s orientation, tilt and shading. Every system should include production monitoring. That data is your evidence if output falls short of the estimate, so also check whether the contract includes a production guarantee.
Before requesting quotes, use the solar payback calculator to set a benchmark you can hold each proposal against.
Sources and Methodology Notes
IRS FAQs on the One Big Beautiful Bill Act changes to §25C, §25D and related credits (linked above).
Arizona Department of Revenue residential solar credit (25%, $1,000 cap), as summarized by DSIRE and the Phoenix Office of Sustainability.
U.S. EIA Electric Power Monthly: residential price data; monthly state averages vary by month.
Arizona Corporation Commission and TEP RCP documentation for export-rate rules.
Modeling assumptions (6.5 sun hours, 0.82 system factor, 0.70 bill-offset, 13.2¢/kWh, 3% escalation, 0.5% degradation) are ours and are explained in our methodology.
Related calculators
Free tools for US homeowners — instant results, all 50 states.
A 10 kW system costs about $23,000 installed in 2026, or roughly $2.30 per watt. EnergySage's Arizona marketplace average was $2.17–$2.30 per watt in July 2026, and single-installer quotes can run higher, so budget $22,000–$30,000 for 10 kW. No federal credit applies to 2026 installations. Arizona's state credit can take up to $1,000 off your state income tax.
The 30% federal homeowner credit (§25D) ended for systems installed after December 31, 2025. Arizona still offers a state income tax credit of 25% of system cost, capped at $1,000 per residence, claimed on Form 310. Solar equipment is also exempt from Arizona sales tax and, under state law, from added property-tax assessment. Confirm your situation with a tax professional.
For a 10 kW system at $23,000, simple payback is about 12.8 years, or about 12.2 years after the $1,000 state credit. That assumes 13.2 cents per kWh, 6.5 peak sun hours and a 0.70 bill-offset factor. At a $30,000 price it is about 16 years; at 15.6 cents per kWh it falls to roughly 10–11 years.
No. Arizona regulators replaced retail net metering with a lower export rate, called the Resource Comparison Proxy (RCP), for APS and TEP customers. New applicants have recently received roughly 5–6 cents per kWh for exported power, locked for 10 years from interconnection, and the ACC limits annual cuts to 10%. SRP sets its own plans. Using solar power at home is worth more than exporting it.
Usually yes if you own a sunny, unshaded roof and plan to stay about 12 years or more. In the model, a $23,000 10 kW system breaks even around year 12 and nets about $38,300 over 25 years. Returns drop if you pay $3.00 per watt, export most of your power, or use little electricity. Compare three quotes and run your own numbers before signing.
$213/month electric bill by state
System size and payback vary by electricity rate and sun hours — see your state.
15.44¢/kWh — Arizona average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
Solar production
6.5 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
Installed price
$3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
Federal tax credit
$0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
Net metering
Net billing / reduced export credit — solar assumed to offset 70% of the bill. Arizona replaced retail net metering in 2017 with a Renewable Credit Rate Rider that pays well below retail for exports.
Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.