Are solar panels worth it? For a cash purchase with correct sizing, usually yes over the long term. For a loan with hidden fees, or a lease you’ll be stuck with when you sell, the math gets much less certain. This article runs the actual numbers instead of giving you a one-word answer, because a one-word answer isn’t honest. Your specific situation changes the outcome more than any national average does.
Table of Contents
- The Short Answer
- The Real Cost Math, Step by Step
- Payback Period: How Long Until Solar Pays for Itself
- What Changed in 2026: No More Federal Tax Credit
- Running the Numbers for a Financed System
- When the Math Works
- When the Math Doesn’t Work
- Key Takeaways
- Frequently Asked Questions
- Why You Can Trust This Article
- Resources
- Next Step
The Short Answer
Whether are solar panels worth it depends on three variables: how you pay for the system, how long you stay in the home, and whether the system was sized to your actual usage. Get all three right, and solar typically pays for itself within a decade and keeps saving for another 15 years after that. Get one wrong, and the math can flip from a clear win into a wash, or worse.
If you want the broader picture first, our honest breakdown of the pros and cons of solar power covers the trade-offs beyond the dollars. This article is about the dollars.
The Real Cost Math, Step by Step
Start with real numbers, not marketing round numbers. Per the CFPB and Lawrence Berkeley National Laboratory, median residential installed pricing runs roughly $2.80 per watt (2023 data). Watch for state-level variation, and note the 2025 pricing spread of $2.4 to $6.3 per watt that Berkeley Lab found among top installers nationally.
| System Size | Rough Cash Price (at $2.80/W) |
|---|---|
| 5 kW | $14,000 |
| 7.7 kW (2025 national median) | $21,560 |
| 10 kW | $28,000 |
Add financing costs on top if you’re not paying cash. Loan dealer fees commonly run 10% to 30% of the cash price, per the CFPB. That meaningfully changes this math, sometimes enough to erase several years of otherwise real savings.
Payback Period: How Long Until Solar Pays for Itself
Payback period is simply your net system cost divided by your annual electricity savings.
Payback period (years) = Net system cost ÷ Annual electricity bill savings
Take an Arizona household paying around $150 a month, or $1,800 a year, and offsetting most of that with a $21,560 cash-purchase system. Payback lands in the 12-year range. That’s before any state credit, and without a federal credit for a 2026 installation (see below). Financed systems with fees, or systems that don’t offset as much usage as promised, push that number out further, sometimes considerably.
It’s worth sitting with what a 12-year payback actually means. Panels typically carry 25-year production warranties. So a 12-year payback still leaves roughly 13 years of largely “free” electricity afterward, assuming the system keeps performing as expected and nothing about your financing terms changes that math.
What Changed in 2026: No More Federal Tax Credit
This is the single biggest change affecting whether are solar panels worth it holds true today versus a couple of years ago. Per the IRS, the 30% federal Residential Clean Energy Credit is not available for any property placed in service after December 31, 2025. It was ended under the One Big Beautiful Bill Act, signed July 4, 2025. Arizona’s own state credit is much smaller: under Arizona Revised Statutes § 43-1083, it’s 25% of cost up to a lifetime cap of $1,000.
Legal disclaimer: This article describes tax credits for general informational purposes only and is not tax or legal advice. Credit eligibility depends on your specific tax situation and when your system was placed in service. Consult a licensed tax professional or attorney before relying on any tax credit figure, and consult IRS.gov or azdor.gov for the current, official rules.
If a proposal you’re evaluating still assumes a 30% federal credit, that assumption is outdated. It’s worth questioning directly, because it represents roughly 30% of the total system cost disappearing from the math. We cover the state credit and the federal deadline in full later in this series.
Running the Numbers for a Financed System
The math changes meaningfully once financing enters the picture. Take the same 7.7 kW system, financed with a 25% dealer fee rolled into the principal:
| Cash Purchase | Financed (25% dealer fee) | |
|---|---|---|
| System cost | $21,560 | $21,560 |
| Financed principal | N/A | ~$26,950 |
| Arizona state credit | −$1,000 | −$1,000 (if the owner, not a lease company, claims it) |
| Net cost | $20,560 | ~$25,950 |
| Payback period (at $1,800/yr savings) | ~11.4 years | ~14.4 years, before interest |
This is exactly why asking for your cash price and your financed price separately, in writing, is one of the most useful things you can do before signing. The gap between the two columns above is the actual cost of financing, and it’s often larger than homeowners expect.
When the Math Works
Here’s when the answer to are solar panels worth it is most often a clear yes:
- You pay cash, or secure a loan with no hidden dealer fees, in writing.
- Your system is sized to your actual 12-month usage, not a sales estimate. Our guide on how many solar panels you need walks through that math.
- You plan to stay in the home long enough to reach payback and beyond.
- You’ve compared at least three quotes. Berkeley Lab found 2025 installer pricing ranged from $2.4/W to $6.3/W among top installers, a wide enough spread to genuinely matter.
When the Math Doesn’t Work
- You’re financing through a lease or PPA and plan to sell within a few years.
- Your proposal assumes a federal tax credit that no longer applies to your installation date.
- The system was sized larger (or smaller) than your usage without a clear explanation from your installer.
- You were told you’d “never pay a power bill again.” Almost no grid-tied Arizona system achieves that literally, and this specific promise is a documented red flag.
Key Takeaways
- Are solar panels worth it? Usually yes for a correctly sized cash purchase. Less certain for financed systems with fees, or leases tied to a home you might sell.
- Typical payback runs roughly a decade for a well-sized Arizona cash system. Financed systems run longer.
- The federal tax credit ended for installations placed in service after December 31, 2025. Factor that into any math you run today.
- Get multiple quotes. Installer pricing varies by more than 2.5x, and financing fees can add years to your payback period.
Frequently Asked Questions
Potentially, depending on your electricity usage and financing terms. The payback period is simply longer without it. Run your own numbers rather than relying on an old estimate that predates the 2025 change.
It depends heavily on the fees. Ask for the cash price and the financed price in writing, separately, before deciding. The difference between the two tells you almost everything you need to know.
Compare it against your actual 12-month usage and your utility’s current rate. Don’t rely on a best-case scenario the salesperson describes verbally without putting it in writing.
Cash-purchase ownership is simplest to sell. Leases and PPAs add real complexity, because the contract usually has to be transferred to the buyer or paid off before closing.
Not automatically. A 14-year payback on a 25-year system still leaves 11 years of savings afterward. It’s worth knowing the real number, even if it’s longer than you hoped.
Significantly. A higher electricity rate shortens your payback period, and a lower one lengthens it. Arizona utilities differ in both rate structure and export-credit rules, so plug in your actual utility’s current rate rather than a statewide average.
Financing fees. A system that’s genuinely worth it in cash can become marginal once a 25% dealer fee is rolled into the loan principal without clear disclosure. That’s exactly why this article treats cash and financed scenarios separately rather than as one blended number.
Why You Can Trust This Article
The pricing and payback figures in this article come from the CFPB’s Issue Spotlight on Solar Financing, Lawrence Berkeley National Laboratory’s 2026 Data Update, and IRS.gov’s current guidance on the federal tax credit, all linked below. Titan Advocacy Group doesn’t sell solar, so this math isn’t built to sell you anything either way. We work with Arizona homeowners after the fact, when the “worth it” promise didn’t hold up, which is why we insist on running cash and financed numbers separately.
Resources
Sources cited in this article:
- CFPB — Issue Spotlight: Solar Financing (August 7, 2024)
- Lawrence Berkeley National Laboratory — 2026 Distributed Solar and Storage Data Update (Tracking the Sun)
- IRS — Residential Clean Energy Credit
- Arizona Revised Statutes § 43-1083 — Residential Solar Energy Credit
Next Step
If you already have solar and the “worth it” math never added up the way it was promised, Titan Advocacy Group offers a free review of your contract.
Request Your Free Contract Review →
Titan Advocacy Group is not a law firm. We provide administrative and consulting support and retain independent attorneys, at our cost, to represent customers who choose to move forward. No specific outcome can be promised.
