7 Red Flags When Choosing a Solar Installer

A solar system is a 25-year relationship with the company that installs it. Most installers are legitimate businesses doing honest work — but solar's high ticket price and complicated contracts attract a fair share of bad actors. The U.S. Treasury's consumer solar awareness guidance and the Solar Energy Industries Association's consumer protection standards describe the complaint patterns that show up again and again. Here are the seven red flags to watch for, what each one looks like in practice, why it matters, and what to do about it.

The 7 red flags

1. Fake government affiliation

What it looks like: The salesperson claims the company is "approved by the Department of Energy," says the program is a "government solar program," or flashes an official-looking seal to pressure you into signing. Why it matters: The federal government does not endorse, approve, or partner with residential solar installers — a company borrowing government authority is manufacturing trust it hasn't earned. What to do: Ask for the claim in writing, then verify it yourself. A legitimate company sells on its own record, not borrowed authority.

2. "Free solar" or $0-down with no explanation of the strings

What it looks like: Ads or door-knockers promising "free solar panels" or "$0 down, pay nothing." Why it matters: There is no free system — $0-down almost always means a lease or PPA where you pay for the power every month for 20–25 years, or a loan where you pay the full cost plus interest. Sometimes a lien or long-term contract is attached to your home. What to do: Ask: "Am I buying, leasing, or signing a PPA? What is the total I will pay over the full term, and what happens if I sell my home?" Get the answers in the contract, not the pitch.

3. High-pressure, sign-today tactics

What it looks like: "This price expires when I leave," limited-time discounts that reset every visit, or refusal to leave a quote for you to review. Why it matters: A five-figure decision deserves comparison shopping; pressure exists precisely to prevent it. What to do: Any company that won't let you sleep on it doesn't deserve the sale. Get at least three itemized quotes and compare them on a $/watt basis before signing anything.

4. Large upfront deposits

What it looks like: Demands for a big payment — sometimes half or more of the project cost — before any work begins. Why it matters: The Treasury specifically flags excessive fees and large upfront deposits: your money is at risk if the company stalls, underperforms, or disappears. What to do: Insist on milestone-based payments tied to completed work (for example: a modest deposit at signing, a payment when equipment arrives, the balance at final inspection and permission to operate). Put the payment schedule in the contract.

5. No license number or proof of insurance offered

What it looks like: The company can't or won't show a state contractor license number, or gets vague when you ask about insurance. Why it matters: Unlicensed work can void warranties, violate building codes, and leave you liable if a worker is injured on your property. What to do: Ask for the license number and insurer, then verify the license with your state's contractor licensing board yourself. If they hesitate, move on.

6. A vague production guarantee with no remedy in writing

What it looks like: Verbal promises — "this system will wipe out your electric bill" — with nothing in the contract about how much power is actually guaranteed. Why it matters: The Treasury advises comparing the minimum power guaranteed and the remedy if it isn't met. Without both in writing, a savings estimate is just a sales number. What to do: Require the contract to state the guaranteed annual kWh production and what the company owes you (a payment, extra panels, system fixes) if it falls short.

7. Won't put the escalator, fees, or buyout terms in the contract

What it looks like: The salesperson quotes a monthly payment but the contract is silent — or evasive — about the annual escalator, fees that can increase over time, or what it costs to buy out or end a lease/PPA. Why it matters: The Treasury's comparison checklist explicitly calls out itemized costs including monthly fees and fee increases over time. Anything not in the contract can change against you. What to do: Refuse to sign until the escalator rate, all fees, and end-of-term and buyout terms appear in the written agreement. Verbal promises are worthless in a dispute.

Where to complain

If you've been misled, the Treasury points consumers to three places: the Federal Trade Commission (FTC), the Consumer Financial Protection Bureau (CFPB), and your state consumer protection agency or attorney general's office. File with your state agency first for licensing and contracting issues — states can act fastest on local companies — and add a federal complaint so the pattern is on record. Keep copies of everything: the contract, all quotes, emails, and notes from sales conversations.

Consumer resources worth bookmarking

Before you sign anything, read SEIA's consumer protection portal, which includes the Residential Consumer Guide to Solar Power, SEIA's 2025 consumer protection standards, and the voluntary Solar Business Code that reputable companies commit to. Comparing any bid against that guide takes twenty minutes and catches most of the red flags above.

The 60-second vetting checklist

Run through this list before you sign — it takes about a minute per bidder:

1. State contractor license number provided — and I verified it myself.
2. Proof of insurance offered without me having to demand it.
3. Quote is itemized: equipment, labor, permitting, interconnection, tax, warranty terms.
4. No claim of government approval, endorsement, or partnership.
5. No "free solar" language; the financing model (buy, lease, or PPA) is stated plainly.
6. No sign-today pressure; I was encouraged to compare quotes.
7. Deposit is modest and milestone-based, not a large lump sum upfront.
8. Production guarantee states minimum kWh and the remedy if it's missed.
9. Escalator, fees, and buyout/end-of-term terms are in the written contract.
10. The company is listed as (or commits to) SEIA's Solar Business Code standards.

If a bidder fails even two of these, keep shopping. The right installer will pass all ten without flinching.

Verified: 2026-10-11 — Treasury Consumer Solar Awareness red flags (fake government affiliation, "free solar" claims, pressure tactics, excessive fees, large upfront deposits; where to complain: FTC, CFPB, state consumer agencies) and comparison checklist (itemized work/materials, fee increases over time, minimum power guaranteed + remedy); SEIA consumer protection portal (Residential Consumer Guide, 2025 standards, Solar Business Code). All linked sources opened and confirmed resolving on 2026-10-11.

This article was drafted with AI assistance and reviewed by the site editor.