Solar warranties and home insurance in the UK: what is covered, what is not, and who to call first

The fastest way to waste a week after a solar problem is to call the wrong party first.

Most confusion comes from mixing two different ideas:

• Warranties cover defects (something failed because it was faulty or installed badly).
• Insurance covers events (storm damage, fire, theft).

If you want a quick postcode-level baseline for expected output and savings where you live, start here: Find your postcode

This guide gives you the clean mental model, the “who do I call” map, and the paperwork that stops you getting stuck.

Quick answer: what covers solar problems in the UK?

If you want the pre-install “avoid future pain” foundation first, read the cluster flagship:

• The most common solar regrets (and how to avoid them before you install)

Assumptions and variability

• We focus on typical UK grid-connected home solar, not off-grid systems.
• We use kWh for energy and refer to SEG export payments (see Glossary).
• We assume your system was installed by a competent UK installer with normal handover documentation.
• What varies most between homes: installer quality and paperwork, whether your insurer treats solar as a declared “home improvement”, and whether damage is clearly an event versus wear/maintenance.
• For the modelling assumptions behind SolarByPostcode pages (yields, seasonality, savings structure), see: Data sources and methodology

The key distinction: defect vs event

Before you think about clauses, decide which bucket the trigger belongs to.

• Defect: something failed because it was faulty, incorrectly installed, or prematurely failed in normal use.
• Event: something happened to it (storm, fallen branch, fire, theft, impact).

This one decision usually tells you who the first call should be.

Table 1: Warranties vs insurance, mapped cleanly

Who to call first (the fast path)

Below is the same idea as a triage flow. It is designed to prevent the most common “wrong first call” loop.

The mistake to avoid: treating “low output” as a warranty claim

A lot of “warranty anxiety” is really a monitoring misunderstanding.

Output varies because:

• weather changes the shape of the day curve
• winter generation is structurally lower
• shading is repeatable when the sun is low

Useful reads:

• Solar monitoring: how to spot underperformance early (without obsessing)
• Winter solar generation in the UK: why batteries can’t fix seasonality
• Shading and solar panels: when a single tree really does matter

If you are trying to understand “what a normal year looks like”, start with the tool and compare your actual to a realistic band rather than one perfect day.

What paperwork matters most (because it is what claims run on)

When something goes wrong, you win claims with evidence.

In practice, the paperwork that matters is usually tied to MCS (see Glossary) and your handover pack.

• MCS certification in the UK: what it guarantees (and what it doesn’t)

Table 2: The paperwork checklist that prevents claim pain

The hidden boundary disputes (where people get stuck)

Most claim frustration comes from one of these patterns:

1) “It is maintenance” (the slow failure problem)

If something slowly got worse, both warranty and insurance can push back.

The way out is evidence:

• what changed, when
• photos
• monitoring history

2) “It is not the inverter, it is the setup”

Inverter faults are common, but a surprising amount of “inverter blame” is actually:

• monitoring configuration
• export limiting or curtailment
• shading patterns

If you need the clean explanation of what an inverter does and what is just marketing noise:

• Inverters explained (UK): what matters, what doesn’t, and what gets oversold

3) “It is covered, but only if you declared it”

Insurance outcomes can hinge on whether solar was declared as part of the building, an upgrade, or a specified item.

This guide cannot see your policy. The decision model is: treat solar as something worth declaring properly, and keep proof of install.

The selling-the-house question: do warranties transfer?

Sometimes, but not always.

The practical move is to assume transfer is not automatic and make your home “easy to hand over”:

• keep the paperwork bundle
• keep monitoring access details documented
• keep any bird-proofing or roof work invoices with the solar pack

This is one reason pigeon-proofing and cleaning should be done sensibly:

• Cleaning bird droppings from solar panels in the UK: what to do, what to avoid, and when to pigeon-proof

Table 3: The “first 24 hours” checklist when something happens

Next reads

• Solar monitoring: how to spot underperformance early (without obsessing)
• Inverters explained (UK): what they do, what can go wrong, and what “clipping” really means
• Solar panel degradation in the UK: what to expect after 10, 20, and 30 years
• Cleaning, bird droppings, and pigeon protection: what is worth doing (and what is not)
• How to compare solar quotes in the UK: a numbers-first checklist
• Do solar panels increase house value in the UK? The boring truth (and when it backfires)

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