Your solar panels are an investment—when something goes wrong, choosing the right repair company can mean the difference between a quick fix and months of wasted energy production. Most homeowners don't know what questions to ask or how to spot an overpriced quote. This guide walks you through the concrete steps to compare solar repair companies and hire someone who'll actually solve your problem.
Check Licensing and Insurance First
Before pricing or warranties matter, verify that a company holds the required licenses in your state. Solar work often requires both a general contractor license and electrical certification. Ask for proof of current licensing and check it against your state's licensing board website—this takes five minutes and protects you from unlicensed operators.
Insurance is equally critical. Request a certificate of general liability insurance (typically $1–2 million coverage) and workers' compensation if they employ technicians. A company without insurance will leave you liable if a technician is injured on your property or causes damage. Any reputable firm will provide this documentation without hesitation.
Understand What's Actually Broken
Get specific about the problem before you call anyone. Is your system showing lower-than-usual output? Are you seeing error codes on the inverter? Is a panel physically damaged? Write down what you've observed—this helps you describe the issue accurately and lets companies give faster, more accurate quotes.
Request an in-person inspection for diagnosis rather than phone estimates. A technician should physically check your inverter, wiring, breakers, and panels. Remote diagnostics are convenient but won't catch loose connections, corrosion, or microcracks that affect performance.
Compare Repair Costs and Scope
Solar repair costs vary wildly by issue and region. Here's what typical repairs run:
- Inverter replacement: $2,000–$5,000 installed (the most common expensive repair)
- Panel cleaning: $150–$300 (sometimes free with a service plan)
- Wiring or breaker repair: $500–$1,500
- Microinverter replacement: $1,000–$2,000 per unit
- Monitoring system fix: $200–$600
Get at least three written quotes that itemize labor and parts separately. A quote that just says "$3,500 for inverter repair" tells you nothing; you need to see the part cost, labor hours, and any warranty period included. Compare apples to apples—ask if the quote includes the old part removal, electrical permits, or inspection fees.
Ask About Warranties on Repairs
A one-year warranty on parts and labor is standard; some companies offer three years. Verify what's covered: does the warranty apply only if they do future maintenance, or is it unconditional? Cheap quotes sometimes come with minimal or no warranty—that's a red flag that should trigger lower pricing or walk away entirely.
Also check if the company honors remaining manufacturer warranties on your panels and equipment. If your inverter still has a manufacturer's warranty, a legitimate repair company should be able to claim it rather than charging you.
Review Response Times and Service Plans
Ask about typical response times for emergency calls—this matters if you live somewhere rural or if a repair delay costs you money. Most urban areas see 24–48 hour response; rural areas may stretch to a week.
Many companies offer annual maintenance plans ($200–$600/year) that include inspections, cleaning, and priority service. For some customers this makes sense; for others, pay-as-you-go is cheaper. Calculate your expected costs over five years under each model.
Check References and Online Reviews
Ask for customer references from repairs completed in the last 12 months—don't just rely on their website testimonials. Call at least two references and ask: Did they stick to the quoted price? Was the work done on schedule? Did the problem actually get solved?
Check Google Reviews, Trustpilot, and the Better Business Bureau for patterns. One bad review isn't telling; three reviews mentioning the same problem (like "they overcharged me after the inspection") is. Look for companies that respond professionally to negative reviews.
Mercoly makes this comparison easier by letting you evaluate and compare trusted solar repair providers side by side in one place, so you're not hunting across a dozen websites.
Frequently Asked Questions
Q: Should I use the solar company that installed my panels for repairs? A: Not necessarily. Installation companies sometimes charge higher repair rates. Get quotes from independent specialists too—they're often more competitive and may be faster for common repairs like inverter replacement.
Q: What's the difference between a microinverter and string inverter repair? A: Microinverters mount on individual panels and cost $1,000–$2,000 to replace each; string inverters are centralized and cost $2,000–$5,000 total. String inverter failures affect your whole system, so they're usually prioritized.
Q: Can I repair my solar panels myself? A: No. Electrical work on solar systems requires licensing and creates electrocution and fire risks. DIY repairs also void manufacturer warranties and may violate local electrical codes.
Get at least three quotes before committing, and verify credentials and warranties in writing.