More and more roofs round Horsham have got panels on them now, and dirty panels just don't work as well. Dust, pollen, bird mess, it all sits on the glass and blocks the sun getting through properly. Solar panel maintenance is one of our GBP categories for a reason, we get asked about it a lot.

We clean panels with pure water and soft brushes so we're not scratching the surface, which matters cause a scratched panel is a panel that's lost some of its output for good. Most manufacturers actually recommend regular cleaning to keep your warranty valid, so it's not just about the electric bill, it protects what you paid for the panels in the first place. We'd say twice a year is about right for most Horsham roofs, more if you're near trees.