Keep your solar panels working at 100% efficiency with a professional clean.
Pure-water, soft-brush cleaning that lifts bird droppings, pollen, dust and traffic film without scratching the glass or voiding your warranty. A dirty array can lose 15–25% of its output — a single clean usually pays for itself in one billing cycle.
Get my instant quoteGet your panels working at full capacity
Solar panels aren't self-cleaning. Rain helps, but it doesn't remove bird droppings, tree sap, pollen films or the greasy traffic residue that builds up over months. Studies suggest dirty panels can lose 15–25% of their output — on heavily soiled installs we've seen 30%+ recoveries after a single clean. If you've noticed your generation figures dropping and nothing's changed with your system, it might just need a clean.
Even partial shading from a single dirty corner can knock a whole string's output down, because the inverter throttles to the weakest cell. One bird dropping in the wrong place is enough to drag the neighbouring panel down with it.
Pure water, no chemicals, no damage
We clean solar panels with the same deionised pure water we use on windows. No detergents, no abrasive tools, no jet washing — nothing that could scratch the glass, damage the anti-reflective coating or void your panel warranty. Our carbon-fibre poles reach up to 35ft from the ground, so we don't need to walk on your roof or lean ladders against the panels.
How often should solar panels be cleaned?
Once a year is enough for most domestic installations — after spring pollen and before peak summer generation gets you most of the benefit. If you've got panels under overhanging trees, near a busy road or under a flight path, twice-yearly will keep them at peak output. We can time it with your window clean or gutter clear to save on call-out costs.
How we do it — pure water, soft brush, from the ground
We use deionised pure water through a soft-bristle brush on a carbon-fibre pole. The pure water lifts dirt and rinses spotless without leaving streaks or mineral residue — exactly the same process the panel manufacturer recommends. Everything happens from ground level, so we never walk on your roof or put ladders on the panels.
What's included
- All panels cleaned with deionised pure water — bird droppings, pollen, lichen, salt spray and traffic film lifted.
- Frames and seals rinsed at the same time, no extra charge.
- No chemicals that could damage anti-reflective coatings or void manufacturer warranties.
- Ground-level access — carbon-fibre poles up to 35ft, no walking on your roof.
- Around the array — moss between panels and on the surrounding roof flagged for you.
- Before and after photos so you can see the difference (and your generation data usually agrees).
- Fully insured — public liability cover on every job.
Pricing
Final price confirmed by M&M Exterior Cleaning after a free site visit — the calculator gives you a realistic ballpark in under a minute.
See your solar-cleaning price in under a minute.
Tell us about your array and the calculator gives you a realistic band before you hand over your number.
Get my instant quoteFrequently asked questions
Will cleaning damage my solar panels or void the warranty?
No. We use only pure water and a soft-bristle brush on a carbon-fibre pole — no detergents, no abrasives, no jet washing. That's exactly the method panel manufacturers recommend, so your warranty stays intact.
How often should I clean my solar panels?
Once a year is enough for most domestic installations. Panels near trees, busy roads or flight paths benefit from twice-yearly cleans. We can time it with your window or gutter clean to save a separate call-out.
Will a clean really make a noticeable difference to my generation?
For neglected arrays, yes. Industry studies put output loss on dirty panels at 15–25%, and we've seen 30%+ on heavily soiled installs. A clean usually pays for itself in one or two billing cycles.