How to Vet a Solar Installation Partner: The Questions That Matter

The usual installer vetting process is a conversation, a look at some completed jobs, and a gut feeling. It is not that this produces bad partners, experienced operators have decent instincts. It is that it produces unexamined partners, and the failures it misses are the ones that surface eighteen months later, when a homeowner calls about a leak and the company that made the penetration no longer exists.

Six checks. An afternoon each for the first three, an ongoing conversation for the last three.

1. Licence, and the entity behind it

Go to the state licensing board's public lookup. Do not accept a number printed on a capabilities document.

Four things to confirm:

• Active and unexpired. Obvious, and still worth actually looking at rather than assuming.
• The right classification. States classify contractor licences differently, and what covers solar and electrical work varies. A licence that is genuinely current can still be the wrong one for the work you are routing.
• The exact legal entity. This is the check most people skip. A licence held by an affiliated company, a predecessor entity, or an individual rather than the business you will contract with does not cover the business you will contract with. Match the name on the licence to the name on the agreement, character for character.
• Disciplinary and complaint history. Public in most states. A pattern is more informative than any single item.

The entity question matters because the licence holder is normally the contractor of record. The party that pulls the permit, answers to the authority having jurisdiction and carries responsibility for the installed system. If you cannot say which legal entity that will be, you cannot say who is accountable. Our post on how to verify a solar contractor licence walks the lookup process in detail.

2. Insurance, certificates from the carrier, with you as certificate holder

Two coverages, both non-negotiable.

General liability, covering property damage and bodily injury arising from the work. Check limits, not just existence.

Workers' compensation, for every person who will be on the roof, including subcontracted crews, which is where coverage gaps hide. An injury to an uninsured worker on a job you sourced can reach further up the chain than most sales organisations assume, and it is not a risk that can be contracted away with a clause alone.

Two procedural points that convert a certificate from decoration into protection:

• Request it from the carrier or broker, not as a PDF forwarded by the contractor.
• Be named as certificate holder. This is what causes you to be notified if the policy lapses or is cancelled. A certificate is a snapshot of one day; being a certificate holder is ongoing.

Then diarise the expiry dates. Coverage verified once at onboarding and never again is coverage verified for one day.

3. Bonding, where the state requires it

A surety bond is a financial guarantee: if the contractor fails to meet legal or contractual obligations, a claimant can recover against it. Many states require one as a condition of licensure and the required amounts vary widely.

Be realistic about what it does. A bond protects a limited class of claimants up to a limited amount, and the amount is frequently modest relative to the value of the work in flight. Verify it exists where required, then stop treating it as meaningful protection. The real protection is items 4 through 6.

4. Capacity, throughput, not headcount

The question is not "how many crews do you have." It is:

• Installs completed per week, over the last quarter. Actual throughput. Crew count is an input; completed installs are the output, and the ratio between them varies enormously between companies.
• What share of that is already committed. An installer at 90% utilisation has no capacity for you, whatever the enthusiasm in the meeting.
• Current backlog in weeks, from notice to proceed to install date.
• Priority order when capacity is tight. If a larger partner increases volume next quarter, where do your projects sit? Ask now, because the answer is much harder to obtain later.

The installer revenue and capacity calculator works the same arithmetic from the installer's side, and it is a useful way to sanity-check the numbers you are given.

5. Workmanship warranty: written, termed, and owed by someone identifiable

Three obligations get conflated constantly, and they are owed by three different parties:

The first two are somebody else's balance sheet. The third is the one you are actually vetting, and the one a homeowner will call about.

Get in writing: the term, exactly what is covered, what voids it, and, critically, which legal entity owes it. Then ask the question people find awkward: what happens to this obligation if that entity is acquired, restructured or ceases trading? A warranty is only worth the durability of the company behind it, which is why item 6 is not a separate concern but the same concern.

The distinctions are unpacked further in who stands behind a solar installation warranty, and the solar warranty coverage checker maps a specific system's obligations to their owners.

6. Financial durability

You will not get audited financials from a private installer, and asking for them will mostly produce awkwardness. Use proxies, and ask directly rather than treating the topic as impolite:

• Trading history under the current name and structure. Recent name changes and restructurings are worth understanding.
• Payment behaviour towards distributors and subcontractors. Suppliers talk, and a contractor who is slow to pay materials is telling you something about cash.
• Channel and product concentration. A business wholly dependent on one sales channel or one lender product inherits that channel's volatility.
• Ownership changes, acquisitions, and any public distress signals.

The residential solar sector has produced enough counterparty failures in recent years that this is a normal commercial question rather than an insult. A partner who answers it straightforwardly is demonstrating exactly the quality you are trying to measure. What happens if the answer turns out to be wrong is covered in what happens when a solar installer goes out of business.

Turning it into a repeatable process

Vetting done once, informally, at the start of a relationship is not vetting, it is onboarding.

Make it a scored assessment so that partners are comparable and so that the gaps are visible rather than remembered. Set re-verification dates, because licences expire, insurance lapses and capacity changes. Re-run the capacity questions quarterly, since throughput and commitment are the fastest-moving of the six. And record the answers somewhere that survives the departure of whoever collected them.

The installer vetting scorecard does this as a structured assessment across all six domains, weighting non-negotiable items separately from the ones that are merely worth knowing.

Where Seamless Home fits

Seamless Home connects closed deals from sales organisations to installing partners in its network, and runs design, engineering, permitting and project management as inside operations. The vetting described above is work the sales organisation does not have to repeat per market, and the licensed installing contractor remains the contractor of record on every project.

Coverage is confirmed per service area rather than promised as blanket availability. If you are currently routing volume to partners you have not checked against all six of these, that is worth an afternoon before it is worth an incident. Get in touch.