Solar cleaning pricing
Solar Panel Cleaning Cost UK 2026
Professional solar panel cleaning costs £89–£199 in 2026 for most domestic systems. UK panels lose 10–25% output from dirt and moss over 1–2 years — and a clean recovers most of that. But if your system is more than 8 years old, the bigger gains come from an upgrade or battery retrofit, not ongoing cleaning. Here is what cleaning costs, and when it is the right call.
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What you pay
Price ranges
| Specification | Price range |
|---|---|
| Up to 12 panels (3 kW system) | £89 – £109 |
| 12–18 panels (4–6 kW system) | £109 – £149 |
| 18–24 panels (6–8 kW system) | £149 – £179 |
| 24+ panels / commercial | £179 – £299+ |
Where the money goes
Cost breakdown
| Component | % of cost |
|---|---|
| Labour (1 engineer, 2–4 hours) | 50% |
| Pure water / cleaning equipment | 10% |
| Scaffolding or MEWP (if needed) | 20% |
| Visual + thermal inspection report | 10% |
| Margin + overheads | 10% |
What changes the price
Variables
- Roof pitch and height +£0 to +£50 — steeply pitched or 3-storey may need different access
- Bird fouling severity +£20 to +£50 — heavy guano requires pre-soak and longer cleaning time
- Moss and lichen +£30 to +£60 — requires biocide treatment and second pass
- System age Systems 5+ years may have stubborn oxidation; cleaning brings back 8–12% yield
Common questions
FAQs
How often should I clean solar panels?
In the UK, once a year is generally sufficient — and rain handles most light soiling on its own. If you're near trees, farmland, seagull nesting areas, or a motorway, an occasional clean is worthwhile. If output keeps dropping after a clean, the cause is usually an ageing inverter or degrading panels, not dirt — at which point an upgrade or battery retrofit is the better investment.
Can I clean solar panels myself?
With the right equipment and safe access, yes. Use de-ionised water and a soft brush — no abrasives, no chemicals, no pressure washers above 300 psi (which can delaminate panel edges). For sloped roofs, professional access is much safer.
How much output do dirty panels lose?
A light film of dust reduces output ~5%. Heavy bird fouling can reduce 20–30% on affected panels. Moss growth blocks cells entirely. Annual cleaning in the UK typically recovers 8–15% lost yield.
Do you clean panels from any brand?
Yes — we clean and maintain all brands: SolarEdge, Fronius, GoodWe, Enphase, Solis, GivEnergy, Tesla, EcoFlow. We didn't need to install the system to service it.
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