Solar Panel Cleaning
Solar Panel Cleaning from Dirty South Power Wash, based in Horley: dirt, dust and bird droppings removed from the panels carefully, since that build-up is what cuts the light they absorb. The first step is a free, no-obligation quote.
Dirt, dust and bird droppings reduce how much light your solar panels absorb, and that means less output. Our professional solar panel cleaning keeps your panels performing at their best, cleaned carefully so the panels are not damaged. It pairs well with our roof, gutter and soft washing services.
What we clean
- Careful cleaning to maximise efficiency
- Removal of dirt, dust and bird droppings
- Pairs with roof, gutter and soft washing
- Domestic and commercial installations
How it works
- 1 Free quote and panel check
We look at the array, the pitch and how we can reach it from the ground or safely from height, and check the condition of the frames and seals before touching anything.
- 2 Pure water, no detergent
Panels get cleaned with purified water through a soft brush on a pole. Detergent leaves a film that attracts more dirt, and hard water dries to a spotted finish that shades the cells.
- 3 Work the whole face, including the bottom edge
Dirt and moss build up worst along the bottom rail, where a shaded strip can drag the whole string down. That edge gets the attention, not just the easy middle.
- 4 Rinse off and leave to dry clear
A final pure water rinse means the panels dry without spotting. We keep off the panel faces throughout, because standing on glass is how they get micro-cracked.
Solar Panel Cleaning: questions these guides answer
Other services
Driveway Cleaning
Remove dirt, moss, algae and stains from block paving, concrete and paved driveways.
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Patio Cleaning
Lift years of built-up dirt, algae and black spots from patios and paving.
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Roof Cleaning
Complete moss removal and roof cleaning, using soft washing or pressure washing.
Learn moreReal results
Solar Panel Cleaning: before & after
Genuine before and after results from recent jobs across Surrey, Sussex and Kent.
Our work
Solar Panel Cleaning in action
Recent jobs from around Surrey, Sussex and Kent.
Customer reviews
What our customers say
Dirty South Power Wash were absolutely fantastic from start to finish. They're extremely friendly, professional, and reliable, making the whole process completely stress free. I had my decking soft washed and the results were amazing, it genuinely looks like new and has been brought back to life. You can really tell they take pride in their work and pay attention to detail. I wouldn't hesitate to recommend them to anyone and will definitely be using their services again in the future!
No fuss, just excellent - from start to finish. Friendly to deal with, clear communication all the way, came when they said they would, did an excellent job. Would use again without a doubt.
Great service, really pleased with our garage roof. All the moss has gone and left nice and tidy. Great guys too. Thanks!
Did a fantastic job on a garage roof clean/moss removal, looks good as new! friendly & professional highly recommend 👏🏼
Really pleased with our driveway😊
They done an amazing job and great price
Good to know
Solar Panel Cleaning: your questions answered
Does cleaning solar panels actually improve output?
Dirt, dust, bird droppings and moss block light from reaching the cells, so removing them lets the panels absorb what they were installed to absorb. How much difference it makes depends entirely on how dirty they were, so you will not be quoted a percentage figure here. The build-up along the bottom edge of a panel matters more than a light film across the middle, because a shaded strip drags down the whole string.
How often do solar panels need cleaning?
It depends on what lands on them instead of on a set interval. Panels under trees, near a busy road, on a farm or below a flight path pick up far more than a panel on an open roof away from all that. A useful habit is to look at the bottom edge of the array: once moss or a dark band is building up along the lower rail, it is worth doing.
Is it safe to clean solar panels?
Yes, when they are cleaned the right way, which means never standing on the glass. The work is done from the ground or from safe access with a soft brush on a pole, keeping off the panel faces entirely, because weight on a panel is how micro-cracks happen. It is also worth checking any cleaning guidance your installer or manufacturer gave you, since that is specific to your system.
Why use pure water instead of detergent?
Because detergent leaves a residue and residue attracts dirt, so a panel washed with detergent gets dirty again faster. Ordinary tap water is worse still: it dries and leaves mineral spotting across the glass, which is the last thing you want on a surface whose whole job is letting light through. Purified water lifts the dirt and dries clear.
Can you clean the panels, the roof and the gutters in one visit?
Yes, and it is the sensible way to do it since the access is set up once. The order matters: roof first, then panels, then gutters, because moss coming off the tiles lands on both the panels and in the gutters. The roof immediately around an array is often the mossiest part of the whole roof, as it stays shaded and gets less rain washing over it.
Do you cover my area for solar panel cleaning?
Surrey, Sussex and Kent are all covered, and for solar work the deciding factor is the roof rather than the distance. A ground-mounted array or a single-storey roof is straightforward almost anywhere. A steep two-storey array with awkward standing room needs looking at first. Send a photo of the array from the ground with your postcode and you will get a straight answer either way.
Popular areas
Need solar panel cleaning?
Free, no-obligation quotes across Surrey, Sussex and Kent. Send a few photos and we will do the rest.