Solar Panel Installer Insurance
Written and reviewed by the Solar Installer Accountants editorial team. Last reviewed 22 August 2026.

Only one insurance a solar installer carries is required by law. The rest are required by customers, by contracts, or by the certification and consumer-code schemes you belong to, which is a different kind of pressure and worth separating out when money is tight.
This is which is which, what the penalties actually are, and how the premiums land on your accounts. We do not arrange insurance and have nothing to sell you here.
The One That Is Required by Law
Employers' liability insurance. You must hold it as soon as you become an employer, and the cover has to be for at least £5 million. That threshold is not a market convention, it is the statutory minimum.
The penalties are steeper than most small firms realise. You can be fined £2,500 for every day you are not properly insured. Failing to display the certificate where employees can see it, or to produce it for an inspector, carries a further £1,000. The government guidance sets out both, and enforcement sits with the Health and Safety Executive.
There are narrow exemptions. You do not need it if the only people you employ are family members, or someone based outside England, Scotland and Wales. A solo installer with no employees is outside it entirely, which is one of the genuine cost differences between working alone and taking on your first fitter.
The Ones That Are Commercially Necessary Instead
Public liability is not required by statute, but it is required in practice by almost every main contractor you might subcontract to and by the consumer codes, and working on domestic roofs without it is not a real option. Professional indemnity matters more than installers expect, because system design and yield estimates are advice, and a shortfall against a projection is a claim about advice rather than about workmanship.
Beyond those sit contract works cover for the installation in progress, tools and stock cover for a van that may be carrying several thousand pounds of inverters overnight, and product liability where you are supplying the hardware as well as fitting it. Working at height and the value of what you carry are what make a solar firm's exposure different from a general electrician's.
None of these is a legal obligation. All of them are conditions of trading with the customers worth having, which in budgeting terms comes to much the same thing.
How Premiums Are Treated for Tax
Business insurance is an allowable expense, so premiums reduce your taxable profit in the year they relate to. That applies to employers' liability, public liability, professional indemnity, tools and the rest, provided the cover is for the business rather than for you personally.
Where a policy covers both business and private use, and van and tools policies often do, only the business proportion is deductible. Keeping the split defensible is a records question rather than a tax question, and it is the sort of thing the bookkeeping should be settling as it goes rather than at the year end.
One point catches VAT-registered installers who are used to recovering VAT on everything: insurance is exempt from VAT, so there is no input tax on a premium to reclaim. What you see is what it costs. Premiums usually carry Insurance Premium Tax instead, which is not recoverable in the way VAT is.
Where It Interacts With Your Certification
Certification and consumer-code membership generally carry their own insurance requirements, so the cover you hold and the schemes you belong to are not separate decisions. It is common for a certification body to bundle insurance requirements into its annual conditions, which is one reason quotes for certification are hard to compare like for like.
The practical order is to establish what your certification body and consumer code require, then insure to that, then check whether employers' liability is triggered by how you engage your fitters. That last point turns on employment status rather than on job titles, and if you are paying people under CIS it is worth being sure which side of the line they fall, because the CIS treatment and the employment position are answered by the same facts.