Did the Solar Tax Credit Really Expire? What AZ Homeowners Need to Know in 2026

If you've been researching solar panels for your Arizona home in 2026, you've probably seen conflicting and outdated information about the federal solar tax credit. Some installer websites still advertise “30% off with the ITC.” Some news articles claim the credit was extended. Both are wrong, and the difference matters by thousands of dollars on a typical system. Here is what actually changed, what is still available, and how the math now works for an Arizona household trying to decide whether solar, batteries, or both make sense.

The short answer: yes, the residential solar ITC is gone

The federal Investment Tax Credit (ITC) for residential solar installations stepped down to 0% after 2025. If you installed solar panels and the system was placed in service (permitted, inspected, and energized) before December 31, 2025, you could claim the credit on your 2025 federal return. If you're installing in 2026 or later, the residential solar ITC under Section 25D no longer applies.

That sounds simple, but a few details trip homeowners up:

• Contract date doesn't count. The IRS measures eligibility by the year the system is “placed in service,” not the contract signing date. Plenty of homeowners signed in late 2025 expecting to claim the credit, then had permitting or interconnection delays push commissioning into 2026 and lost eligibility.
• The battery ITC is separate and still alive. Section 25D distinguishes between “qualified solar electric property” and “qualified battery storage technology.” The first expired; the second continues at 30% through 2032 and steps down only after that.
• Commercial solar follows different rules. If you're a small business or you operate a farm, the commercial ITC under different sections of the tax code is still on the table with its own eligibility tests.

How we got here, in one paragraph

The residential solar ITC was originally enacted in 2005 at 30%, was extended repeatedly, was raised back to 30% by the Inflation Reduction Act in 2022 with a long sunset, and was rolled back ahead of schedule by subsequent tax legislation that prioritized other energy-policy tools. The political details are beyond this article's scope, but the practical effect is unambiguous: residential solar buyers in 2026 are negotiating without the ~30% federal credit that drove the prior decade of installer pricing models. Installers are still adjusting their quotes and financing partners to reflect the new reality.

What this means for your solar ROI

Without the 30% federal credit, a typical 8 kW system in Phoenix costs roughly $22,800 installed. The Arizona state credit (Form 310) shaves off 25% up to a $1,000 cap, leaving a net cost of about $21,800. Those numbers vary by installer, equipment selection (Tier 1 panels vs budget tier, Enphase microinverters vs string inverters), roof complexity, and whether the install includes a main service panel upgrade.

With 6.5 peak sun hours and Arizona's rising utility rates (APS summer peak hit $0.3439/kWh in 2026), solar still makes financial sense in Arizona. The payback periods just stretched from 7–8 years to 13–16 years depending on your self-consumption rate, your TOU plan, and whether you also add a battery. The 25-year warranty on most modern panels still produces ~9–10 years of pure savings after payback, but the headline ROI is no longer the slam-dunk it was in 2023–2024.

The plot twist: battery storage still gets 30%

Here's what most articles miss: the battery ITC remains at 30% through 2032. Standalone batteries (no solar required) qualify for the full credit under Section 25D. Combined with the APS Cool Reward rebate ($3,750) and the Arizona state credit, you can slash battery costs by 60–70%.

A 13.5 kWh Tesla Powerwall 3 system that costs $12,825 installed can net down to roughly $4,200 after all incentives. The math:

Add APS peak arbitrage ($0.3439/kWh peak vs $0.1235/kWh off-peak in summer) and VPP earnings ($150–$500/year), and the payback on a battery alone is 4–5 years. That's a fraction of solar's new payback timeline, on a much smaller upfront investment.

The 2026 strategy for Arizona

How to think about your decision depends on where you're starting from:

1. If you don't have solar: Consider solar + battery together. Solar still produces at Arizona's 6.5 peak sun hours, and the battery captures the 30% federal credit on its portion. Sizing the system around what you can self-consume (rather than what you can export at the new lower rates) is the lever that improves payback most.
2. If you already have solar: Adding a battery is the highest-ROI energy upgrade available in Arizona right now. You get the full 30% ITC, the APS rebate (if you're an APS customer), and you shift your solar from exporting at low export rates to displacing peak-rate grid power at $0.34/kWh. For most existing solar owners, the battery pays back faster than the original panels did.
3. If you don't have solar but want some independence: A standalone battery on TOU arbitrage is a fundamentally different (and faster) payback than a solar system. You're betting on the rate spread, not on the export rate. With APS's peak/off-peak spread now at $0.22/kWh, the math works for many households.
4. Enroll in VPP if you're on APS: The APS Virtual Power Plant program adds $150–$500/year in passive income from your battery with minimal impact on your daily use. This is the closest thing to free money in Arizona energy economics right now.

What about SRP and ED3 customers?

APS gets most of the headlines because it's the largest Arizona utility, but the math shifts if you're served by SRP or one of the smaller utilities:

• SRP customers: SRP retired traditional net metering in November 2025 (see our SRP retirement explainer). Self-consumption is now the dominant lever for solar ROI on SRP, which makes batteries even more important than they are on APS. SRP's Smart Energy Plan rebate offers different battery incentives than APS Cool Reward, but works similarly in concept.
• ED3 (Maricopa) customers: ED3 has Rider 8B for net metering and a Peak Rewards rebate program for batteries. ED3's rate structure is different from APS, and the math for solar/battery economics needs to be run on ED3-specific rates rather than APS defaults.
• TEP, UNS, and co-op customers: Each has its own rate schedule and incentive program. The federal battery credit applies regardless of utility.

Honest caveats before you decide

A few things that don't fit neatly into the “solar is dead, long live the battery” narrative:

• Solar still works without the credit. Payback got slower, not impossible. If you plan to live in your home for 15+ years, solar still produces a lifetime financial return. It's no longer a 7-year payback like 2023, but panel warranties stretch 25 years and post-payback savings are pure profit.
• Battery-only economics depend on rate stability. If APS, SRP, or your utility flattens the peak/off-peak spread in a future rate case, a battery's arbitrage value drops. Look at the regulatory trajectory before assuming today's spread will hold for 15 years.
• The federal credit could come back. Tax law changes. A future Congress could reinstate the residential solar ITC. We don't recommend waiting on the off-chance, but if you're a year or two from installation, follow tax legislation before locking in.
• Consult a tax professional. The numbers in this article are general guidance based on the published tax code and Arizona Department of Revenue forms. Your specific tax liability, ability to use a credit, and AMT/passive-activity considerations require professional advice.

Run your numbers

Don't take our word for it. Our calculators use real APS, SRP, and ED3 TOU rates plus current 2026 incentive data. See exactly what solar and battery would cost and save for your specific Arizona home, and compare scenarios side by side.