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Solar Maintenance · sub-service

Solar Panel Cleaning Cost & Service UK 2026

Professional solar panel cleaning for homes, commercial roofs and farm installations across the UK. Deionised water, abseil access on roofs, no chemicals.

Updated 6 July 20266 min readReviewed by Steve Moran

What solar panel cleaning costs in 2026

Solar panel cleaning costs in the UK in 2026 range from £85 for a typical 4kWp domestic install with telescopic deionised-water access, up to £4-£12 per panel for commercial roof installations requiring abseil or boom lift access. A typical 250kWp commercial roof clean is £1,800-£3,200.

Pricing is bespoke per site — talk to our consultants. Get a tailored quote →

Why panel cleaning matters

UK solar panels lose 2-4% generation per year to dirt build-up — pigeon droppings, lichen, traffic film around urban installs and pollen in spring. An annual deionised-water clean reverses 95%+ of that loss. On a £200,000 commercial install losing 4% to dirt, that is £1,800-£2,400/year of lost generation income.

How we clean

  • Deionised water only — no chemicals. DI water leaves no residue and dries spot-free.
  • Soft brush heads on telescopic poles for domestic and accessible commercial roofs.
  • Abseil access for commercial pitched roofs above 4m, with full RAMS and permit-to-work.
  • Boom lift for ground-mount arrays and large flat commercial roofs.
  • Generation report before and after — proves the productivity gain.

FAQs

Can I clean my own solar panels?
You can — but most domestic roofs are too high to clean safely from a ladder, and a single misstep on a wet panel can crack the glass. Most DIY 'cleans' miss the lower edge where dirt accumulates most. £100/year for a professional clean is one of the best-value maintenance items you can buy.
Do I need to clean panels in winter?
Generally no — rainfall does most of the work. The right time for a clean is late spring (post-pollen) or early autumn (pre-winter).
Does bird-strike damage cleaning?
Cleaning often reveals damage. We report any cracked or chipped panels found during cleaning and quote for replacement. Bird-strike damage is often covered by home insurance.

Request a Fully Funded Electrical & Structural Survey

Tell us about your roof, your bills and your goals. KMM runs a fully funded electrical & structural survey, designs a system, runs the numbers and tells you honestly whether solar makes sense for you. No deposit, no pressure.

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