Energy
Solar installation: what buyers verify before they hire.
Solar has become the highest-complaint home improvement category in the country. Production guarantees, financing disclosure, and company longevity outweigh everything else.
Why trust is harder in solar installation
Solar sells a twenty-five-year asset from companies that frequently do not last five years. The warranty, the production guarantee, and the monitoring service are only worth as much as the entity standing behind them — which makes corporate longevity a first-order trust signal rather than a footnote.
The other structural issue is financing. Much of the category's complaint volume concerns loans, leases, and power purchase agreements with escalator clauses that were not clearly explained, and liens placed on homes that complicated later sales.
The signals that carry the most weight
NABCEP certification
North American Board of Certified Energy Practitioners certification for installers and designers, the recognized standard.
Production guarantee in writing
A guaranteed kWh output with a stated remedy if actual production falls short.
Financing terms fully disclosed
Loan APR, term, dealer fee, escalator clauses on PPAs, and any UCC filing or lien against the property.
Company age and installed volume
Years operating and systems installed, which is directly relevant to whether the warranty will be honored.
Separate equipment and workmanship warranties
Panel, inverter, and roof-penetration workmanship warranties stated separately with their durations.
Utility interconnection track record
Demonstrated experience with the local utility's interconnection process, a common source of delay.
Red flags that cost points
- Door-to-door or high-pressure same-day signing
- Savings projections with no stated production guarantee
- Financing dealer fees not disclosed in the quote
- PPA escalator clauses omitted from the sales presentation
- Company founded within the last two years selling 25-year warranties
Where solar installation buyers actually check
- NABCEP certified professional directory
- state contractor licensing board
- Better Business Bureau
- EnergySage and SolarReviews
- secretary of state entity registry
Vettify pulls from these public sources when it scores a solar installer. If a signal cannot be verified, it is reported as unverified rather than estimated.
Answers
The questions people are actually searching.
How do I know if a solar company is trustworthy?
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Weight longevity and written guarantees above the sales pitch. Check how long the entity has existed with the secretary of state, since a twenty-five-year warranty from a two-year-old company is a limited promise. Require a written production guarantee with a stated remedy, not just a savings estimate. Confirm NABCEP certification. And read the financing document independently of the sales presentation — the loan is often where the real cost lives.
What is a solar production guarantee?
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It is a contractual commitment that your system will generate a specified number of kilowatt-hours per year, with a defined remedy — usually a payment for the shortfall — if it underperforms. This is different from a savings estimate, which is a projection with no obligation behind it. Many complaints in this category come down to the customer believing the estimate was a guarantee. If the guarantee is not in the contract with a remedy attached, it does not exist.
What is a good trust score for a solar installer?
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Solar installers score 40 to 75, the lowest average band of any category Vettify covers, driven by short company lifespans and financing opacity. High scores require multi-year entity history, NABCEP certification, a written production guarantee, separately stated equipment and workmanship warranties, and full financing disclosure including dealer fees and any property liens.
Should I lease solar panels or buy them?
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Ownership — cash or loan — retains the tax credits and avoids the complications that leases and power purchase agreements create at resale, since the agreement must be assumed by the buyer or bought out. Leases and PPAs reduce upfront cost but frequently include annual escalator clauses that raise your rate over time. Whichever you choose, the trust question is the same: was the escalator, the buyout, and the transfer process explained in writing before you signed?
How can a solar installer improve its trust score?
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Publish your entity founding date and cumulative installed capacity. Put your production guarantee and its remedy on your website, not just in the contract. Separate and state your panel, inverter, and workmanship warranty terms. Disclose financing dealer fees in the quote itself. And drop high-pressure closing practices — same-day signing pressure is one of the most reliable negative signals in this category's review data.
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