Arizona Solar Incentives 2026: APS, SRP, and State Tax Breaks

Arizona is home to the highest solar irradiance in the United States — Phoenix averages 6.0–6.5 peak sun hours per day, and Yuma is the sunniest city in the country with more than 4,000 annual sun hours. That should make Arizona a no-brainer for solar, and in many ways it is. But the incentive story is complicated: the state has generous property and sales tax exemptions, yet two of its largest utilities have made rooftop solar economics challenging in ways that surprise buyers from other states.

This guide breaks down every Arizona solar incentive available in 2026, explains the utility policy landscape in plain terms, and shows you exactly what a typical Arizona homeowner can expect to pay — and save.

Federal Solar Tax Credit: 30% for Every Arizona Homeowner

The federal Investment Tax Credit (ITC) applies equally in Arizona as everywhere else. Install a solar system in 2026 and you can claim 30% of the total installed cost as a credit against your federal income taxes.

How it works: If your 8 kW system costs $24,000, you claim a $7,200 credit on your federal tax return — not a deduction, but a direct reduction in what you owe. If your tax liability is smaller than $7,200, the unused portion carries forward to future years.

The 30% rate is locked in through 2032 under the Inflation Reduction Act, then steps down to 26% in 2033 and 22% in 2034 before expiring for residential installations.

Arizona-specific dollar examples:

System Size	Gross Cost	30% ITC	Net After ITC
6 kW	$18,000	-$5,400	$12,600
8 kW	$24,000	-$7,200	$16,800
10 kW	$30,000	-$9,000	$21,000
12 kW	$36,000	-$10,800	$25,200

Battery storage added to a solar installation also qualifies for the 30% ITC — a critical point for SRP customers (more on that below).

Note on Arizona state income tax credit: Arizona had a 25% state residential solar tax credit (capped at $1,000) that expired on December 31, 2015 and was not renewed. There is no Arizona state solar income tax credit available in 2026.

Arizona Property Tax Exemption: 100% of Added Value

Arizona Revised Statutes §42-11054 exempts the full value added by a solar energy device from your property tax assessment — permanently, for the life of the system.

A typical 8 kW solar installation adds $18,000–$24,000 to your home's assessed value. In Maricopa County (Phoenix), the effective property tax rate is approximately 0.67%. That means:

Added value: $20,000
Annual tax savings: $20,000 × 0.67% = $134/year
Over 25 years (panel warranty period): $3,350

In Pima County (Tucson), effective rates run slightly higher (~0.76%), producing similar savings on that $20,000 added value: roughly $152/year, or $3,800 over 25 years.

This exemption requires no application — it's automatically applied during your property assessment. When you add solar, notify your county assessor's office so the equipment value is coded correctly, but the exclusion is mandatory under state law.

Arizona Sales Tax (TPT) Exemption on Solar Equipment

Arizona's Transaction Privilege Tax (A.R.S. §42-5061) exempts solar energy equipment from the state's 5.6% base sales tax rate. Combined with local taxes, Arizona's total sales tax rate averages 8.3% — so the exemption on a $24,000 system saves approximately $1,992 in state/local taxes.

This exemption covers solar panels, inverters, racking hardware, batteries, and wiring specifically installed as part of a solar energy system. Your contractor should automatically apply this exemption — if they don't, flag it before signing the contract.

Understanding Arizona's Utility Landscape

Here's where Arizona gets complicated. The state's three main utilities handle solar customers very differently, and which utility serves your home determines whether your payback period is 7 years or 12 years.

APS (Arizona Public Service): Net Billing, Not Net Metering

APS serves approximately 1.3 million customers across most of the Phoenix metro area, central Arizona, and parts of northern and eastern Arizona. In 2017, the Arizona Corporation Commission approved APS's transition from traditional retail-rate net metering to a "net billing" model.

What changed: Under traditional net metering, excess solar production sent to the grid earns a retail-rate credit (e.g., 13¢/kWh produced = 13¢/kWh credit). Under APS's net billing, excess production earns an "Excess Energy Credit" (EEC) — currently approximately $0.028–$0.035 per kWh (2025–2026 rate), compared to the retail rate of $0.13–$0.15/kWh.

That's a 75–80% reduction in the value of excess solar production.

What this means for system sizing: With APS net billing, overproducing significantly is economically wasteful — you'll sell excess power at 3¢ but bought grid power at 13¢. Right-sizing your system to match your consumption (not exceed it) is far more important than in net-metering states.

APS does offer a "Time-of-Export" (TOE) incentive for production during peak demand hours (3–8 PM), which can partially offset the lower base export rate. Solar paired with battery storage (store midday production, discharge during 3–8 PM peak) can optimize earnings under APS's rate structure.

APS key numbers (2026):

Residential retail rate: ~$0.13–$0.15/kWh
Excess Energy Credit: ~$0.028–$0.035/kWh
Time-of-Export adder: additional ~$0.01–$0.03/kWh for 3–8 PM production

SRP (Salt River Project): Demand Charges Change the Math

SRP serves approximately 1 million customers in the eastern Phoenix metro area (Mesa, Chandler, Gilbert, Tempe, Scottsdale east, Queen Creek). SRP is a public power district — it is not regulated by the Arizona Corporation Commission — which is why it was able to make a dramatic change in 2015 that permanently altered solar economics for its customers.

In 2015, SRP replaced standard net metering with the Customer Generation Plan — a rate structure that adds a monthly demand charge based on your highest 30-minute electricity consumption interval in the billing period. The demand charge is approximately $32–$38 per kW of peak demand per month.

Why this matters: A solar-only system (no battery storage) often creates a demand charge problem. Your solar panels produce well during the day, but you still draw maximum power from the grid in the evenings or on overcast days. A single high-demand event — running the AC, dishwasher, and oven simultaneously — sets your demand charge for the entire month. Some SRP solar customers saw their bills increase after going solar, despite having good solar production, because the demand charges exceeded their energy credit savings.

The SRP solution: Battery storage. A properly sized battery (Tesla Powerwall 3, Enphase IQ 5P, or similar) can "peak-shave" your demand by storing solar energy for high-demand moments, reducing your peak 30-minute interval. The 30% ITC applies to battery storage added to a solar system, which partially offsets the added battery cost.

SRP solar is not impossible to make work financially — but it requires a battery and more careful system design than APS or TEP. Get quotes from installers experienced specifically with SRP Customer Generation plan optimization.

SRP Customer Generation Plan key facts (2026):

Monthly demand charge: ~$32–$38/kW of peak demand
Solar export credit: low (demand-based model deprioritizes simple export)
Battery storage: strongly recommended for positive ROI
Interconnection: SRP manages its own interconnection process independently of APS/TEP

TEP (Tucson Electric Power): Traditional Net Metering Intact

TEP serves approximately 440,000 customers in the Tucson metro area and surrounding communities. TEP has retained traditional retail-rate net metering, making Tucson one of the most favorable solar markets in the country — combining the state's exceptional irradiance with utility economics comparable to Texas or New York.

Under TEP's net metering program:

Excess solar production credits your account at the full retail rate
Credits accumulate month-to-month and reconcile annually each April
System size up to 10 kW (AC) qualifies for the residential program

A 7 kW system in Tucson (6.5 peak sun hours/day) will produce approximately 10,200 kWh/year — covering the average Tucson home's electricity use — and earn full retail credits on any excess.

UNS Electric (formerly UniSource)

UNS Electric serves northern Arizona communities including Prescott, Kingman, Bullhead City, and Lake Havasu City. UNS offers standard net metering for residential customers (up to 100 kW). Given the smaller customer base and excellent sun hours in northern Arizona, solar economics under UNS are generally favorable.

Utility Comparison Summary

Utility	Service Area	Solar Policy	Export Rate	Battery Needed?
APS	Phoenix metro, central AZ	Net billing	~$0.03/kWh	Helpful but optional
SRP	East Phoenix metro	Demand charge plan	Very low	Strongly recommended
TEP	Tucson metro	Net metering	Retail rate (~$0.12/kWh)	Optional
UNS	Northern AZ	Net metering	Retail rate	Optional

Arizona Low-Income Solar Programs

USDA Rural Energy for America Program (REAP): Rural Arizona residents and agricultural businesses may qualify for REAP grants covering up to 50% of installed solar costs and/or guaranteed loans for the remainder. The Inflation Reduction Act funded REAP with $2.5 billion through 2031 — a major program for farms, rural small businesses, and energy-intensive operations in Arizona's agricultural communities (Yuma, Casa Grande, Safford). Applications are submitted to the USDA Arizona State Rural Development office.

Weatherization Assistance Program (WAP): Low-income Arizona homeowners (income ≤200% of federal poverty level) can access WAP funding through the Arizona Department of Housing. WAP primarily funds energy efficiency measures, but electrical upgrades through WAP can bring older homes up to the service-capacity standards needed to support solar installation.

Tribal Energy Programs: The U.S. Department of Energy's Office of Indian Energy provides grants and technical assistance for solar projects on tribal lands. Arizona has 22 federally recognized tribes — many with exceptional solar resources — and this program is actively expanding solar access on tribal lands.

Community Solar: Several Arizona utilities and third-party providers offer community solar subscriptions. For APS customers who are dissatisfied with net billing for rooftop solar, a community solar subscription can provide bill credits at slightly better rates than the residential EEC. See the full community solar guide for how these programs work.

Full Worked Examples: Arizona Homeowner Solar ROI

Example 1: Phoenix Homeowner Under APS

Profile: 2,200 sq ft home in Scottsdale, APS customer, average 1,350 kWh/month consumption, electric bill ~$180/month

System: 9 kW solar (28 panels × 370W)

Gross installed cost: $27,000
Federal ITC (30%): -$8,100
Net cost after ITC: $18,900
Property tax exemption (0.67% × $22,000 added value × 25 years): ~$3,685 savings
Sales tax exemption savings: ~$2,241

Annual production: 9,000W × 6.2 peak sun hours × 365 × 0.82 efficiency = ~16,700 kWh Annual self-consumption: ~10,800 kWh (80% of 13,500 kWh annual use) Annual APS export (at $0.03/kWh): 5,900 kWh × $0.03 = $177 export credit Annual grid savings (at $0.13/kWh): 10,800 kWh × $0.13 = $1,404 bill reduction

Total first-year savings: $1,581 Simple payback period: ~12 years

Note: The low export rate significantly lengthens payback vs. a net-metering state. Right-sizing the system to ~8 kW and adding a battery to maximize self-consumption can shorten payback to 9–10 years under APS.

Example 2: Tucson Homeowner Under TEP

Profile: 1,800 sq ft home in Tucson, TEP customer, average 1,050 kWh/month consumption, electric bill ~$130/month

System: 7 kW solar (20 panels × 370W)

Gross installed cost: $21,000
Federal ITC (30%): -$6,300
Net cost after ITC: $14,700
Property tax exemption (0.76% × $17,000 added value × 25 years): ~$3,230 savings
Sales tax exemption savings: ~$1,743

Annual production: 7,000W × 6.5 peak sun hours × 365 × 0.82 = ~13,650 kWh Annual savings (self-consumed + retail export credit at ~$0.12/kWh): ~$1,638/year

Simple payback period: ~9 years

Tucson's combination of high irradiance AND retail-rate net metering creates one of the strongest solar ROI cases in the country.

Arizona Solar Application Checklist

Verify your utility: Check your electric bill header — APS, SRP, TEP, or UNS. This determines your solar economics more than any other factor.
Size correctly for your utility: APS and SRP customers should prioritize self-consumption; TEP and UNS customers can safely oversize slightly to maximize annual credits.
Consider battery storage: Essential for SRP. Beneficial for APS (improves self-consumption). Optional for TEP/UNS unless you want backup power.
Claim the 30% ITC: File IRS Form 5695 with your federal return for the installation year. Keep all contractor invoices.
Notify county assessor: Inform your county assessor's office that you've installed a solar energy device to ensure the property tax exemption is applied.
Contractor sales tax: Confirm your installer is applying the Arizona TPT exemption — the $0 sales tax on equipment should appear on your contract.
REAP for rural/agricultural: If you're outside a major metro area and/or have agricultural activity, apply to USDA REAP before signing installation contracts.

Comparing Arizona to Other Top Solar States

Arizona's incentive stack looks lean compared to New York (25% state credit + $5K max), New Jersey (SREC II income stream), or California (SGIP battery rebate). But Arizona's raw solar resource is unmatched — 6+ peak sun hours in Phoenix vs. 4.0 in New Jersey or 5.5 in Florida. A system in Arizona simply produces more electricity per panel, which partially compensates for the weaker utility incentive structures.

The critical variable is your utility:

TEP customers: Full solar economics comparable to the best states in the country
APS customers: Good economics, requires right-sizing and ideally battery pairing
SRP customers: Economics work but require battery storage for positive ROI — factor that into your initial quote

For a full comparison of state incentive stacks, see the 2026 state-by-state solar incentives guide. For help calculating your specific payback period, use the solar payback period calculator guide.

Key Takeaways

What Arizona has:

30% federal ITC (same as all states)
100% property tax exemption on solar equipment value (permanent)
Full sales tax (TPT) exemption on solar equipment
The best solar irradiance in the continental United States

What Arizona lacks:

State income tax credit (expired 2015)
Statewide retail-rate net metering (APS and SRP moved away from it)
Utility rebate programs (APS and SRP have eliminated most rebates)

Bottom line: Arizona's solar economics depend heavily on your utility. TEP customers in Tucson have among the best solar ROI in the country. APS customers in Phoenix have good economics but should size systems carefully and consider batteries. SRP customers in the east Phoenix metro need battery storage to make the math work — but with a battery and the 30% ITC covering that too, Arizona solar is still a strong long-term investment.

Get quotes from multiple installers who specify experience with your utility's specific rate structure. For installer selection guidance, see the best solar companies 2026 guide. For current installed cost benchmarks, see the solar panel installation cost guide.