21/10/2026
🦠🦠 Lichen - A solar panels arch nemesis!
Why is lichen such a problem for solar panels? 🌱☀️
Unlike everyday dirt and dust, lichen doesn’t simply sit on the surface of a solar panel. It attaches firmly to the glass, making it much more difficult to remove.
And it’s not just a cosmetic issue.
⚡ Reduced performance – Lichen blocks sunlight, potentially reducing the energy generated by affected panels.
🔥 Potential hotspots – Persistent shading can contribute to localised heating within solar cells, particularly where electrical mismatch occurs.
🔬 Damage to the anti-reflective coating (ARC) – Lichen produces organic acids and forms a strong attachment to the glass. Over time, this can contribute to deterioration or etching of the panel’s anti-reflective coating, potentially leaving permanent marks even after the lichen has been removed.
🧽 More difficult cleaning – The longer lichen is left to establish, the more challenging and time-consuming it can become to remove safely.
⚠️ Risk of damage during removal – Aggressive scrubbing, excessive pressure or unsuitable chemicals can further damage the glass surface and its protective coatings.
The important thing to remember?
Solar panels are designed to operate for decades, but that doesn’t mean they should be left without maintenance.
Once the anti-reflective coating has been damaged, cleaning cannot restore it.
Early intervention is key. Removing lichen before it becomes firmly established can help protect performance and reduce the risk of lasting surface damage.
Have you noticed lichen developing on any of the solar installations you manage?