Why the South West Takes a Pounding

Anyone who lives between Penzance and Gloucestershire knows the pattern: a spell of bright, generous weather, followed by an Atlantic low that arrives overnight with 60mph gusts and rain travelling almost horizontally. That weather is part of what makes the region such a strong performer for solar — long daylight hours and plenty of unshaded roofs — but it also means your array will face conditions that a panel in the Midlands simply never sees.

Coastal salt spray is the quiet troublemaker. It settles on glass, frames and mounting hardware, and over time it accelerates corrosion on cheaper fixings and dulls the surface of the panels themselves. When a gale follows, anything already weakened is far more likely to fail.

Before the Storm Arrives: A Fifteen-Minute Walk Round

You do not need to get on the roof. Most of the genuinely useful pre-storm checks can be done from the ground, from a bedroom window, or from a loft hatch looking up at the underside of the roof. Do them while the weather is still calm.

• Look at the panels from below and to the side. Check that rows are still level and evenly spaced. A panel that has shifted a few centimetres is a panel that is working loose.
• Check the garden and driveway. Trampolines, garden furniture, wheelie bins, planters, gazebos and even heavy toys become projectiles in a gale. Move them inside or lash them down well away from the house.
• Inspect nearby trees. A branch overhanging the array is a risk in two ways: it can snap and strike the panels, and it will drop leaves and sap onto the glass. Get a qualified tree surgeon to deal with anything substantial before winter.
• Confirm the inverter is showing normal operation. If it has been logging errors or the app has been quiet, sort that out now rather than discovering it after a storm.
• Note your normal daily generation. Having a rough figure for a clear day in that month gives you a benchmark to compare against afterwards.

What Actually Damages Rooftop Arrays

Wind rarely rips a well-installed panel straight off a roof. What usually happens is more gradual and more frustrating. Uplift forces work on the gap between panel and roof surface, and over years that pressure can loosen clamps, distort rails and open up the sealed points where fixings pass through the roof covering.

Flying debris is the second threat, and it is often mundane: a ridge tile, a chunk of fence panel, a slate lifted from a neighbouring roof. Impact damage may leave no visible mark, but it can cause micro-cracks in the silicon cells. These are invisible from the ground and show up later as a slow, steady drop in output rather than a dramatic failure.

On flat-roof commercial arrays, ballasted rather than bolted down, the risk profile is different. Keep the ballast weight and layout exactly as specified — it is calculated for local wind loading, and moving blocks about to make room for something else undermines the whole design.

Using Your Inverter as an Early Warning System

Modern inverters and monitoring apps are quietly excellent at telling you something is wrong before you notice it on a bill. After severe weather, check whether generation has returned to something close to your benchmark. A string that has dropped to zero usually means a cable or connector issue. A string performing at, say, 70% of its usual figure may point to physical damage or water ingress.

Never try to investigate DC cabling yourself. Solar circuits can be live whenever there is daylight, and the voltages involved are genuinely dangerous. If something looks or reads wrong, switch off at the AC isolator only if you have been shown how, and call your installer.

After the Storm: Safe Checks from Ground Level

• Scan the roof with binoculars. Look for tilted panels, gaps in a row, dangling cable, or displaced flashing around mounting points.
• Check inside the loft. New damp patches, daylight or staining near fixing positions suggest the roof seal has been compromised.
• Look at the ground below the array. Bits of clamp, bolt, cable tie or sealant are clear evidence of movement up top.
• Photograph anything unusual before it is repaired — useful for insurance and for showing your installer exactly what you saw.

If you spot damage, keep people away from the area beneath the array and arrange a professional inspection. An annual service, ideally booked for late autumn before the worst of the weather, is the single most effective thing you can do to reduce storm risk.

Year-Round Habits That Build Resilience

Washing the panels two or three times a year does more than improve output. It forces you to look closely at the array, and salt film, bird droppings and tree sap are all easier to remove before they bake on in summer. While the glass is being cleaned, the frames, clamps, rails and cable clips can be checked at the same time.

Ask your maintenance provider to inspect fixings for corrosion, replace any UV-degraded cable ties, confirm that bird-proofing mesh is still secure, and check that the isolators and connectors are dry and undamaged. Keep a simple written record of every visit, including dates and photographs. In the South West, where a single winter can deliver half a dozen named storms, that history is what turns a routine maintenance habit into real protection for a system you expect to last twenty-five years.