Solar panels are remarkably low-maintenance, but the Welsh climate — with its rain, wind, occasional snow and abundant bird life — means Cardiff homeowners should follow a simple maintenance routine to keep their systems performing at their best. Here is everything you need to know.
How Often Should You Maintain Your Solar Panels?
For most Cardiff homes, a basic visual check every 3–4 months and a professional service every 12 months is sufficient. The frequent rain in South Wales actually helps keep panels relatively clean, but moss, lichen and bird droppings can build up over time and reduce efficiency by 5–15%.
DIY Maintenance: What You Can Do Yourself
When to Call a Professional
Some maintenance tasks should only be handled by a qualified MCS-certified installer. GL Solar offers annual servicing packages for Cardiff homeowners that include:
Cardiff-Specific Maintenance Considerations
The South Wales climate presents some unique challenges for solar maintenance:
Moss and Lichen: Cardiff's damp climate encourages moss growth. While rain helps, moss can stick to panels and reduce light transmission. Annual professional cleaning removes this buildup safely.
Storm Damage: High winds and occasional storms can affect mounting systems. We recommend a post-storm visual check, especially after winter gales.
Snow Load: While rare in Cardiff, heavy snow can temporarily block generation. Modern panels are rated for snow loads, but gentle clearing from ground level can help if safe to do so.
Sea Air: For coastal Cardiff areas like Penarth and Barry, salt air can affect metal components over time. We use marine-grade fittings in these locations.
Book Your Annual Solar Service
GL Solar offers comprehensive annual maintenance packages for Cardiff homeowners. Keep your system running at peak efficiency year after year.