Red Flags: How To Spot A Shady Solar Company

You got three quotes last week. The lowest one was $4,000 cheaper than the others, the salesperson was at your door for two hours, and they want a 50% deposit before they’ll pull a permit. Something feels off. Trust that instinct, because residential solar is one of the most complaint-heavy home improvement categories in the country, and the Federal Trade Commission has logged thousands of fraud reports tied to door-to-door solar sales alone. Before you sign anything, you need to know exactly how to vet the company standing in your driveway.

Start With License and Insurance, Not Google Reviews

Every state requires solar installers to carry an electrical contractor’s license, a general contractor’s license, or both. The specific requirement varies by state, but there’s no legitimate gray area here. If the installer can’t hand you a license number on the spot, that’s a red flag, not an administrative inconvenience.

Here’s what you actually do. Ask for the license number and the name it’s issued under. Then verify it yourself. Every state has a contractor licensing board with an online lookup tool. California has the CSLB (Contractors State License Board). Florida has the DBPR. Take five minutes and check. Confirm the license is active, that the license type covers electrical or solar work, and that there are no disciplinary actions on file.

Insurance is equally non-negotiable. You want two things: general liability coverage (typically $1 million per occurrence for a reputable outfit) and workers’ compensation. If a worker gets hurt on your roof and the company doesn’t carry workers’ comp, you could end up liable. Ask for a certificate of insurance and call the insurance company directly to confirm the policy is current. Don’t just accept a PDF. PDFs can be faked.

NABCEP Certification: The Gold Standard You Should Know About

Most homeowners have never heard of NABCEP. That’s a problem, because it’s the most respected credential in the solar installation industry. The North American Board of Certified Energy Practitioners certifies individual installers and installation companies, and earning that certification requires documented field experience, passing a rigorous exam, and ongoing continuing education.

A NABCEP-certified installer isn’t automatically perfect, but their presence on a crew means someone on that job has demonstrated real technical competency. You can search the NABCEP directory at nabcep.org and verify any certification claim independently.

Separately, look up the company on the Solar Energy Industries Association (SEIA) member directory. SEIA membership doesn’t guarantee quality, but companies serious about the industry tend to participate in trade organizations.

The Permit Problem: What Too Many Installers Skip

This one drives me crazy because I’ve seen it go badly wrong for homeowners. Solar installations require permits. Full stop. The permit triggers an inspection by your local building or electrical department, which is the official check that the system was installed to code. Skipping it is illegal, and it creates serious problems down the road.

If you sell your house, an unpermitted solar system will almost certainly surface during the buyer’s inspection or title search. You may be forced to bring it into compliance at your own expense or disclose it as a defect. More immediately, your homeowner’s insurance policy may not cover damage related to an unpermitted electrical installation.

Ask every installer you’re considering: “Will you pull the permit, or do I need to?” The answer should always be that they handle it. Ask to see a copy of the permit application before work begins, and ask to be present for or receive documentation of the final inspection sign-off.

Some installers will try to move fast and frame the permit as red tape. That’s a contractor protecting their margins, not your home. The permitting fee is typically $100 to $500 and is almost always included in a legitimate proposal.

Red Flags in the Contract and Sales Process

Let’s get specific. Here are the behaviors that should make you slow down or walk away entirely.

High-pressure urgency: “This pricing is only good through Friday” or “We have one slot left in your neighborhood” are classic tactics. Real incentives like the 30% federal Investment Tax Credit don’t expire on Friday. The ITC is locked in by your installation date, not the salesperson’s schedule.

Excessive deposit demands: A deposit of 10 to 25% of the total project cost is typical. Demanding 50% or more before permits are pulled is unusual and leaves you exposed if the company folds or disappears.

Vague equipment lists: A legitimate proposal will name the specific panels (manufacturer, model, wattage), the specific inverter, and the racking system. If you see “Tier 1 solar panels” or “premium microinverters” without brand names, that’s a company keeping their options open to install whatever’s cheapest. Pin them down in writing.

No physical address: Search the business address on Google Maps. Does it show a real office or warehouse? Or a UPS Store mailbox? Combined with other warning signs, an unverifiable address matters.

Promised production numbers that seem too high: If a company is guaranteeing your bill will drop to zero without doing a proper site assessment and shading analysis, they’re either inflating numbers to close the deal or they don’t know what they’re doing. Production estimates depend on your roof’s pitch and orientation, local solar irradiance data, shading from trees or neighboring structures, and your actual consumption patterns.

Step-by-Step: How to Vet an Installer Before You Sign

Use this process for every company you’re evaluating. It takes about an hour per installer and can save you thousands.

1. Get the license number in writing. Ask the salesperson or the company’s office. No legitimate company will hesitate.
2. Verify the license online. Find your state’s contractor licensing board and confirm active status, license type, and any disciplinary history.
3. Request a certificate of insurance. Ask them to have their insurance carrier send it directly to your email address. This is standard practice in the trades.
4. Search NABCEP. Go to nabcep.org and check if the company or any of their lead installers are certified.
5. Look up reviews on multiple platforms. Don’t stop at Google. Check the Better Business Bureau, Yelp, and especially the CFPB complaint database (cfpb.gov). Look for patterns in negative reviews, not just star counts.
6. Pull the proposal apart. Every piece of equipment should have a manufacturer name and model number. If it doesn’t, ask for it in writing before you sign.
7. Confirm the permitting plan. Ask specifically who pulls the permit and how you’ll receive documentation of the final inspection.
8. Check for HOA requirements. If you have an HOA, many have rules about panel placement, color, and visibility. Some require HOA approval before installation. Your installer should know this and factor it in. If they’ve never mentioned it, that’s a gap in their process.
9. Talk to a past customer. Ask the company for references from jobs in your zip code from the past 12 months. Then actually call. Ask how the permitting went, whether the system produces what was promised, and how the company handled any issues.
10. Compare proposals on price per watt. Divide the total system cost by the total system size in watts. In 2024, a fair range for a fully permitted residential system with quality equipment is roughly $2.50 to $3.50 per watt before incentives. Significantly below that range warrants scrutiny. So does anything above $4.50 without a clear reason.

What Happens If Something Goes Wrong After Installation

Even a legitimate, licensed installer can have issues. Equipment fails, production underperforms, or workmanship problems show up six months after installation. Knowing your recourse ahead of time matters.

First, understand the difference between the equipment warranty and the workmanship warranty. Equipment warranties come from the manufacturer. A reputable panel like a SunPower or REC panel carries a 25-year product and performance warranty. Inverters vary: string inverters typically carry 10 to 12 year warranties, while microinverters from companies like Enphase carry 25 years. Your installer’s workmanship warranty covers the installation itself, typically for 5 to 10 years from a reputable company.

If a company goes out of business after installing your system, that workmanship warranty is worthless. This happens more than people realize. The U.S. Department of Energy’s resources for homeowners going solar specifically flag installer bankruptcies as a risk to factor into your decision. Choosing an established company with years of local history isn’t a guarantee, but a brand-new operation with no track record in your area deserves extra scrutiny.

Monitor your system’s output from day one. Most modern systems come with an app or monitoring portal. If you want more granular visibility into your home’s overall energy picture, a home energy monitor like the Emporia Vue or Sense can be installed at your electrical panel to track consumption and production side by side.

If you have a dispute with an installer, your first call should be to your state’s contractor licensing board, which has enforcement authority. The CFPB handles financing complaints if you financed the system. And if you’re considering taking legal action, the permit records and inspection documentation you kept from the installation process will be critical.

The solar industry has plenty of genuinely good installers who will do right by you, stand behind their work, and still be in business when you need them in year 15. The homework I’ve outlined above takes a few hours and gives you a much clearer picture of who you’re actually dealing with. Your system will be on your roof for 25 years. Spend the time before you write the check.

Sources

• Emporia Vue or Sense can be installed at your electrical panel
• Emporia Vue 2 Home Energy Monitor
• P3 Kill A Watt Electricity Usage Monitor
• EG4 Battery Monitor Shunt for Solar Systems
• Los Muertos Crew

Disclosure: As an Amazon Associate, we earn a small commission from qualifying purchases at no extra cost to you. We only recommend products that genuinely support the topics covered in this article.

• Renogy 200W Solar Starter Kit + 30A Charge Controller (~$169), Complete beginner solar kit, 200W monocrystalline panel, charge controller, and mounting hardware included.
• Renogy 2×100W Monocrystalline Solar Panels (~$99), Expandable 200W panel set from the most trusted DIY solar brand, used widely in off-grid and home backup systems.

Recommended Resources

Disclosure: As an Amazon Associate, we earn a small commission from qualifying purchases at no extra cost to you. We only recommend products that genuinely support the topics covered in this article.

• Renogy 200W Solar Starter Kit + 30A Charge Controller (~$169), Complete beginner solar kit, 200W monocrystalline panel, charge controller, and mounting hardware included.
• Renogy 2×100W Monocrystalline Solar Panels (~$99), Expandable 200W panel set from the most trusted DIY solar brand, used widely in off-grid and home backup systems.