How to Dispute a Bad Solar Installation

Your solar system isn't performing as promised. Maybe the panels are producing 40% less energy than the installer guaranteed. Maybe there's a roof leak at every mounting point. Maybe the company won't return your calls. You're not alone — the solar industry's explosive growth has brought legitimate installers and fly-by-night operators alike, and disputes are rising sharply.

Here's how to fight back, step by step.

Step 1: Document Everything

Before you make a single phone call, build your evidence file. This is the foundation of any successful dispute, whether it ends in a negotiated fix, a regulatory complaint, or a courtroom.

Photographs and video. Document the installation from every angle. Capture close-ups of sloppy wiring, improperly sealed roof penetrations, cracked panels, or damaged shingles. Include timestamps.
Production data. Download your monitoring app data (SolarEdge, Enphase, Tesla) showing actual vs. projected output. Screenshot the installer's original production estimate from your proposal.
Communication records. Save every email, text message, and voicemail. Log every phone call with the date, time, who you spoke to, and what was said.
Your contract. Re-read the entire agreement. Flag the production guarantee, warranty terms, workmanship standards, and dispute resolution clause.
Inspection reports. If your city or county required a post-installation inspection, request the report. Failed or conditional inspections are powerful evidence.

Step 2: Understand Your Warranty Coverage

Solar installations involve multiple warranties from different parties. Knowing who is responsible for what saves you from getting bounced between companies.

Manufacturer Warranty

Panel manufacturers provide two warranties. The product warranty (typically 10 to 12 years, some premium brands offer 25) covers manufacturing defects — cracked cells, delamination, junction box failures. The performance warranty(typically 25 years) guarantees the panels will produce at least 80% to 85% of their rated output by year 25.

If your panels are defective, the manufacturer is responsible, not the installer. Contact the manufacturer directly with your serial numbers and production data.

Inverter Warranty

String inverters typically carry 10 to 12-year warranties. Microinverters (Enphase) carry 25-year warranties. If your inverter fails, contact the inverter manufacturer. The installer may charge labor to swap it, depending on your contract.

Installer Workmanship Warranty

This is the one that matters most for installation defects — roof leaks, faulty wiring, improperly mounted racking, code violations. Installer workmanship warranties range from 2 years (suspicious) to 25 years (strong). Ten years is common. If your roof leaks because of how the panels were mounted, this warranty covers it.

The problem: If the installer goes out of business, their workmanship warranty is worthless. This is why checking an installer's financial stability and track record matters, and why you need to know your other options when the warranty route fails.

Step 3: Send a Formal Demand Letter

A written demand letter creates a legal record and signals that you're serious. Send it via certified mail with return receipt requested. Include:

A clear description of the problem
Specific contract provisions that have been violated
The remedy you're requesting (repair, refund, production shortfall credit)
A reasonable deadline (14 to 30 days)
A statement that you will pursue legal and regulatory remedies if they don't respond

Many disputes are resolved at this stage. Companies that ignore customer calls often respond to certified letters because they know what comes next.

Step 4: File Regulatory Complaints

If the installer doesn't respond or refuses to fix the problem, escalate to the agencies that can hurt their business license.

State Attorney General

Every state AG has a consumer protection division. File a complaint online. The AG's office tracks complaint patterns and can investigate companies with repeated violations. In many states, the AG can pursue injunctive relief or civil penalties against deceptive contractors.

State Contractor Licensing Board

Solar installers must hold a contractor's license in most states. In California, that's the Contractors State License Board (CSLB). In Florida, the Department of Business and Professional Regulation. In Texas, the Texas Department of Licensing and Regulation. Filing a complaint with the licensing board can trigger an investigation and potentially result in license suspension or revocation. This is real leverage.

To find your state's board, search for "[your state] contractor licensing board" or check the National Association of State Contractors Licensing Agencies (NASCLA) directory.

Better Business Bureau

A BBB complaint isn't regulatory, but it's public. Companies that care about their reputation respond to BBB complaints because unresolved complaints drag down their rating. The BBB also mediates disputes and can facilitate arbitration.

Federal Trade Commission

If the installer used deceptive advertising or high-pressure sales tactics, file a complaint at ReportFraud.ftc.gov. The FTC doesn't resolve individual disputes, but it uses complaints to identify patterns and take enforcement action.

Step 5: Pursue the Contractor Bond

Most states require licensed contractors to carry a surety bond (typically $15,000 to $25,000). If the installer refuses to honor their contract, you can file a claim against their bond:

Look up the installer's license with your state licensing board. The bond company (surety) and bond number should be on file.
Contact the surety company and request a claim form.
Submit the claim with your documentation: contract, photos, demand letter, and evidence of the installer's failure.
The surety investigates and may pay out your claim up to the bond limit. The contractor then owes the surety company.

Bond claims are underused by homeowners because most people don't know they exist. They're free to file and can recover real money.

Step 6: Small Claims Court

If your damages fall within your state's small claims limit (typically $5,000 to $15,000, up to $25,000 in some states), small claims court is fast and affordable. You don't need a lawyer. Filing fees are usually $30 to $75.

Key preparation steps:

Organize your evidence chronologically
Bring the original contract, your demand letter and their response (or lack thereof), photos, and production data
Get a written repair estimate from an independent solar installer
Be concise — judges handle dozens of cases per day

Step 7: When to Hire a Solar Attorney

If your damages exceed the small claims limit, if the contract includes a mandatory arbitration clause, or if the installer committed fraud (forged signatures, misrepresented equipment, falsified production estimates), you need legal representation.

Look for attorneys who specialize in construction defects or consumer protection with solar experience. Many work on contingency for clear-cut cases. The Solar Rights Alliance and your state bar association can provide referrals.

Cases worth pursuing with an attorney:

Roof damage exceeding $10,000 in repair costs
Systems producing less than 50% of guaranteed output
Forged contract signatures or unauthorized credit applications
Installers who took payment and never completed the work
UCC liens filed improperly that are blocking a home sale

What Not to Do

Don't stop making loan payments. Even if the system is defective, defaulting damages your credit and gives the lender grounds to pursue you. Dispute the installation separately from the financing.
Don't hire someone else to fix it first. If you modify the system before the installer can inspect and repair, you may void your warranty claim.
Don't rely on social media alone. Negative reviews have their place, but formal complaints create real regulatory consequences. Do both.

Bottom Line

A bad solar installation is fixable if you approach it methodically. Document first, demand in writing, then escalate through regulators and the bond system. Most disputes are resolved before they reach court. The installers who ignore customers are counting on you to give up. Don't. The regulatory and legal tools available to homeowners are powerful, and they exist specifically for situations like yours.