April 29, 2026

How to Choose a Solar Installer: What to Look for and What to Avoid

Choosing the right solar installer is just as important as choosing the right panels. A good installer means a system that performs as promised, a smooth permitting process, and a warranty that actually gets honored. A bad one can mean poor workmanship, inflated prices, or a company that disappears when you need service.

With thousands of solar companies operating across the US, the field ranges from excellent to outright predatory. Here’s how to tell the difference.

Start with Credentials

The first filter is certification. Look for installers with NABCEP certification (North American Board of Certified Energy Practitioners) — the gold standard in the solar industry. NABCEP-certified installers have passed rigorous exams and demonstrated real-world experience. Not every technician on a crew needs to be certified, but the company should have at least one certified professional overseeing installations.

Beyond NABCEP, confirm the installer is:

Licensed in your state for electrical and/or contractor work
Insured — both general liability and workers’ compensation
Registered with your state’s contractor licensing board

You can verify licensing through your state’s contractor board website. It takes five minutes and can save you significant headaches.

Evaluate Their Experience and Track Record

How long has the company been in business? Solar installers come and go — the industry saw a wave of new entrants during the incentive boom years, and many have since folded. An installer with 5+ years of operation and hundreds of local installations is a safer bet than a startup with a polished website.

Ask specifically:

How many installations have you completed in my county or city?
Can you provide references from customers with systems at least 2–3 years old?
What brands of panels and inverters do you install, and why?

A company confident in its work will answer these questions easily. Evasiveness is a red flag.

Understand What You’re Being Quoted

Solar quotes can be confusing by design. Here’s what to look for:

System size (kW). Make sure the quote specifies the total system size and the number and wattage of panels. A vague quote that just mentions “enough to cover your bill” without specifics is a problem.

Panel and inverter brands. Premium panels like those from Renogy, REC, or Silfab carry better warranties and long-term performance than budget alternatives. If an installer won’t tell you what brand they’re installing, walk away. For reference, quality panels like the Renogy 200W N-Type carry 25-year output warranties — that’s the standard you should expect from any brand your installer proposes.

Production estimate. The quote should include an estimated annual kWh production for your system. Cross-check this using PVWatts (a free NREL tool) with your address and the proposed system size.

Warranty terms. You want three separate warranties: a panel performance warranty (typically 25 years), an inverter warranty (typically 10–12 years), and a workmanship warranty from the installer (at minimum 10 years). If any of these are missing or shorter than standard, ask why.

Price per watt. Divide the total installed cost by the system’s wattage to get cost per watt. The national average is roughly $2.50–$3.50 per watt after incentives. Quotes significantly above this range deserve scrutiny.

Red Flags to Watch For

High-pressure sales tactics. “This price is only good today” is a sales technique, not a reflection of reality. A reputable installer will give you time to compare quotes.

Door-to-door sales. Not automatically disqualifying, but door-to-door solar sales have a poor track record. The company behind a door-knocker may be legitimate, but verify everything independently before signing anything.

Lease-first pitches. Leases benefit the installer more than the homeowner in most cases. If an installer leads with a lease rather than explaining purchase options with the 30% federal tax credit, ask them to run both scenarios side by side.

No local presence. National companies that subcontract to local crews often leave homeowners without clear accountability when service issues arise. Prefer companies with a physical local office and their own installation teams.

Unusually low bids. A quote significantly below competitors usually means lower-quality panels, inexperienced labor, or a company that won’t be around to honor its warranty.

Get Multiple Quotes

The single most important thing you can do is get at least three quotes. Pricing varies significantly between installers — sometimes by 20–30% for comparable systems. Multiple quotes also give you leverage to negotiate and help you spot outliers in either direction.

Our free quote tool connects you with pre-screened local installers who compete for your business. You fill out one form, and installers come to you — no cold calls, no door-knockers.

Questions to Ask Every Installer

Before signing any contract, ask:

Are you NABCEP certified? Can I see proof?
Who will actually be on my roof — your employees or subcontractors?
Who handles the permit application, and how long does it typically take in my area?
What happens if there’s a roof leak caused by the installation?
How do I contact you for service after installation, and what’s your average response time?
What monitoring system is included, and can I see my production data in real time?

The answers tell you a lot. A company that handles permits in-house, employs its own crews, and has a clear service process is operating professionally. One that stumbles on these questions likely isn’t.

Consider Battery Storage While You’re At It

If you’re going through the process of getting quotes and permitting, it’s worth asking installers about battery storage at the same time. Adding storage during the initial installation is significantly cheaper than retrofitting it later — you avoid a second permitting process and additional labor costs.

The 30% federal tax credit now applies to battery storage as well, making it a natural add-on to evaluate. Systems like the EcoFlow DELTA 2 Max and the BLUETTI AC200L are popular choices for homeowners who want backup power and maximum energy independence.

The Bottom Line

The right solar installer is experienced, licensed, transparent about what they’re installing, and accountable when something goes wrong. Take the time to verify credentials, compare at least three quotes, and ask the hard questions before signing.

The best starting point is getting free quotes from vetted local installers — it costs nothing and gives you the information you need to make a confident decision.

Get free quotes from local solar installers →

Ready to Sell Your Home Fast?

Get free competing solar quotes in 24 hours. No obligation, no fees.

Get My Free Solar Quote

← Back to Seller Resources