Storm Damage to Solar Panels: Assessment, Insurance Claims and Repairs (2026)

Solar panels are designed to withstand severe weather, but extreme conditions can still cause damage. High winds, large hail, lightning strikes, and flying debris all pose risks to solar installations, though the actual damage rate is lower than many homeowners expect. Modern panels are tested to withstand 25mm hail at speeds of 80 km/h and wind loads equivalent to sustained gusts of 140 mph, meaning most UK storms pass without causing any damage at all. When damage does occur, it is typically to mounting systems, wiring, or from debris impact rather than the panels themselves failing.

The UK has experienced increasingly frequent named storms in recent years, with Storm Éowyn, Storm Darragh, and others bringing wind gusts exceeding 100 mph to parts of the country. Research by Aviva found that 22% of UK homes had suffered storm damage in the preceding five years, and with over 1.5 million homes now having solar panels, storm damage to PV systems has become a growing concern for homeowners and insurers alike.

This guide explains what types of storm damage can affect solar panels, how to safely assess your system after severe weather, the insurance claims process for storm damage in the UK, when repairs make sense versus replacement, and how to protect your system from future storms. We also cover the crucial distinction between damage covered by insurance and issues covered by manufacturer warranties, and what to do if your insurer disputes whether damage qualifies as storm-related.

Quick Overview

Types of Storm Damage to Solar Panels

Wind Damage

Wind is the most common cause of storm damage to solar panels in the UK. While the panels themselves are designed to withstand high wind speeds, the mounting systems, roof penetrations, and electrical connections can be vulnerable to sustained gusts or turbulent conditions.

Hail Damage

Hail damage is less common in the UK than in some other countries, but severe hailstorms do occur occasionally. Solar panels are tested to withstand hailstones up to 25mm (1 inch) in diameter at speeds of 80 km/h (52 mph), which covers the vast majority of UK hail events.

Hail Damage Types

Microcracks and hotspots are the two most insidious hidden problems that can follow a storm. For the technical detail on what they look like and why they matter, see our dedicated guides to solar panel microcracks and solar panel hotspots.

Lightning Damage

Direct lightning strikes to solar panels are rare, but surge damage from nearby strikes is more common. Modern inverters include surge protection, but very close strikes can overwhelm these protections.

Water and Flooding Damage

How Resilient Are Solar Panels

Testing Standards

Real-World Performance

The data consistently shows that solar panels are more resilient than homeowners typically expect. Most storm damage claims that cite hail turn out to have other causes or no actual functional damage. Wind damage, particularly to mounting systems, is the genuine concern.

Safety After a Storm

Immediate Safety Rules

When to Shut Down Your System

How to Shut Down Safely

Important: Even with isolators off, solar panels continue to generate DC voltage whenever light hits them. The panels themselves cannot be fully de-energised during daylight hours. Only qualified professionals should work on DC side components.

Assessing Storm Damage

Initial Assessment (From Ground Level)

Monitoring System Check

Your inverter’s monitoring app is one of the most useful tools after a storm. A sudden step-change in output – even if the panels look fine from the ground – is a strong indicator of hidden damage. For a systematic approach to diagnosing output drops, see our guide to why solar is producing less than expected and the solar panel fault-finding guide.

When to Call a Professional

Professional Inspection Methods

UK Insurance Coverage for Storm Damage

What Buildings Insurance Typically Covers

Solar storm damage cuts across buildings insurance, contents insurance and sometimes specialist policies – so understanding exactly what’s covered is essential. Our detailed solar panel insurance claims guide walks through policy wording, declarations and claim strategy in depth.

UK Insurance Definition of a Storm

Insurers use specific criteria to determine whether damage qualifies as storm damage. According to the Association of British Insurers (ABI), a storm is defined as:

Insurers will check weather records to verify that conditions met these criteria at the time of claimed damage. If conditions did not meet the definition, the claim may be rejected as not being storm damage.

Ground-Mounted vs Roof-Mounted Coverage

Battery Storage Coverage

Making an Insurance Claim

Step-by-Step Claims Process

Documentation to Gather

Common Claim Disputes

If Your Claim Is Rejected

Insurance vs Warranty Coverage

What Each Covers

Key Distinction

Warranties cover faults with the product or installation that emerge over time. Insurance covers damage from external events like storms. If your panels fail because of a manufacturing defect that becomes apparent after a storm, that is a warranty issue. If your panels are physically damaged by the storm, that is an insurance issue. Sometimes both may apply, such as if storm damage reveals a pre-existing installation fault. For the warranty side of the equation in detail, see our solar panel warranty claims guide.

Repair vs Replacement Decisions

When Repair Makes Sense

When Replacement Is Needed

Hidden Damage Considerations

Storm damage is not always visible. Panels that look fine externally may have microcracks or cell damage that reduces performance and creates safety risks over time. For insurance claims, it is important to request professional testing (thermal imaging or electroluminescence) to identify hidden damage before accepting settlement.

Preventing Storm Damage

Installation Quality

Pre-Storm Preparation

Regular Maintenance

If your system is more than 10-15 years old, a major storm is a natural point to consider whether components like the inverter are near end-of-life anyway. Our guide to upgrading old solar systems covers when repair-and-upgrade makes more financial sense than straight like-for-like replacement.

Summary

Solar panels are remarkably resilient to storm damage. Testing standards ensure they can withstand hailstones up to 25mm and wind loads exceeding typical UK storm conditions. When damage does occur, it is most often to mounting systems or from debris impact rather than direct failure of the panels themselves. Understanding this helps set realistic expectations and focus attention on the genuine risks.

Safety is paramount after any storm. Even damaged panels continue generating electricity when light hits them, creating serious shock hazards. Never touch damaged panels or climb onto a roof to inspect damage. Assess from ground level first, check your monitoring system for output anomalies, and call a qualified professional for any inspection that requires roof access.

For insurance purposes, document everything thoroughly before any repairs. Photographs, weather records showing conditions met the storm definition, and professional inspection reports all strengthen your claim. Be aware that insurers may dispute claims where conditions did not meet the official storm definition or where they believe damage is due to wear and tear or poor installation rather than the storm itself.

Hidden damage is a significant concern with storm-affected panels. Microcracks and internal cell damage may not be visible but can spread over time, reducing output and potentially creating fire risks. For any significant storm event, consider requesting thermal imaging or electroluminescence testing before accepting insurance settlement to ensure all damage is identified and covered.