Dirty panels quietly cost you money
Solar panels only earn their keep when light reaches the cells. Anything sitting on the glass gets in the way: road dust, pollen, bird mess, leaf litter blown off nearby trees, and moss creeping down from the ridge and along the frames.
The frustrating part is that it happens slowly. Nothing looks broken. Output just drifts down over a couple of years and most people put it down to the weather. Rain is not the answer either. It rinses the loose dust off and leaves a dark tidemark of grime along the bottom edge of each frame, which is exactly where you least want shading.
Cleaning the glass properly puts that light back where it belongs. It is a small job with a long payback, and it is one of the few bits of maintenance a solar system ever asks for.
How we clean solar panels
We use purified water and a soft brush on a water-fed pole, the same system we use for window cleaning across Kent. The water is filtered until there is nothing dissolved in it, so it lifts dirt off the glass and then dries without leaving spots or streaks behind.
What we do not do matters just as much:
- No detergents or chemical cleaners on the glass
- No abrasive pads, scrapers or blades
- No high pressure, which can force water past the seals around the frame
- No walking on the array
Working from the ground with poles keeps weight off your roof and keeps our team off it too. Where the pitch or height means poles will not reach safely, we say so before quoting rather than improvising on the day.
While we are there we look at the state of the surrounding roof. Moss on the tiles above an array washes down onto it after every shower, so if the roof needs attention we will mention it and you can decide whether to have a roof clean at the same time.
How often panels should be cleaned
Once a year suits most installations. Some settings need more.
Steeper panels shed some dirt on their own. Shallow ones hold it. If you are not sure which side of that your array sits on, tell us the pitch when you get in touch and we will advise.
Who we clean for
Homeowners. Most of our solar work is domestic, on houses and bungalows where the array went in during the last few years and has never been touched since.
Commercial property managers. Larger roof arrays on offices, units and blocks of flats, cleaned on a schedule so nobody has to remember to book it. We can survey several sites together.
New solar roof owners. A first clean clears installation dust, adhesive residue and boot marks off the glass so the system starts as it means to go on. If the panels have just gone up, it is worth doing.
Getting a price for solar panel cleaning
We do not price solar work from a form, because access is the thing that changes the job and we cannot see it from here. What we need from you is:
- How many panels, and roughly where they sit on the roof
- The property type and roof pitch, if you know it
- How easy the array is to reach, including gates, side access and parking
- When they were last cleaned, if ever
- Whether there is obvious bird mess, moss or staining
- Your name, phone number, street and postcode
Send that through the contact page and a colleague will call you back to go through it and arrange a look at the property. You get a written price after that, with no obligation and nothing hidden in it.
Where we work
We are based in Chatham and clean solar panels across Kent, including the Medway towns of Gillingham, Rainham and Rochester, and Maidstone and the surrounding villages. We also cover Dartford and the wider county.
Because we are already on a lot of these roads for window and gutter rounds, it often makes sense to combine jobs. Customers regularly have the panels done at the same time as a gutter clear, which saves a separate visit and keeps the roofline tidy in one go.
What happens after you get in touch
A colleague calls you back to confirm the details and agree a time that works for you. We turn up with the pole system and purified water, clean the glass, check the frames and edges, and let you know if we spot anything that needs looking at.
We are fully insured, and every job carries our 100% satisfaction guarantee. If something is not right, tell us and we will come back and sort it.
One-off cleans are paid by card through a secure link, or by bank transfer or cash. If you decide to have the panels done on a regular basis alongside your windows or gutters, GoCardless takes care of payment automatically after each visit.