There is no fixed schedule that suits every system, but generally speaking, your solar panels should be cleaned every 12–18 months (more often if they're exposed to dust, trees or bird droppings) to keep them working efficiently.

Yes. Any material covering the glass—including dust, pollen, algae or bird droppings—reduces the amount of sunlight reaching the solar cells. How much this affects performance depends on the type and amount of contamination. Heavy or uneven soiling (such as bird droppings) can have a much greater impact than a light layer of dust.

The cost depends on several factors, including: Number of panels Height of the property Roof access Roof pitch Level of contamination Whether specialist access equipment is required Every quotation is different, which is why we provide a tailored price following your FREE Drone Survey.

The safest and most effective method is using ultra-pure reverse-osmosis, deionised (RO/DI) water with specialist soft brushes designed for solar panels.Ultra-pure water leaves no mineral deposits or streaks, allowing the panels to dry naturally without chemicals or detergents.Avoid pressure washers, abrasive pads or household cleaning products, as these may damage the panels or invalidate manufacturer warranties.

Cleaning itself won't void your warranty, but failing to maintain the system or causing damage through incorrect cleaning methods could affect warranty claims.Check your specific manufacturer's terms, but generally, panel manufacturers expect a reasonable level of maintenance.Always check your manufacturer's documentation.

Rain helps with loose dust but doesn't shift the stubborn stuff — bird droppings, sap, algae, and grime baked on by sun tend to stay put or even attract more dirt over time. Panels are also installed at an angle designed for sun exposure, not for water to run off effectively, so rain alone isn't a substitute for a proper clean.

You can, but it's genuinely risky. Roof access, working at height, and using the wrong equipment (stiff brushes, jet washes, or the wrong cleaning products) can scratch panel glass or damage seals, on top of the obvious fall risk.Professional cleaning is generally the safest option.

Common signs include:Visible dirt or stainingBird droppingsMoss or algae around the panel edgesHeavy pollen build-upNearby trees dropping sap or leavesA noticeable drop in electricity generation compared with previous years (after accounting for seasonal weather) If you're unsure, a FREE Drone Survey allows you to inspect your panels safely from the ground.

Yes, when carried out by trained professionals using appropriate access methods and specialist equipment.

No.We clean using ultra-pure, reverse-osmosis deionised water, which leaves no residue and requires no detergents.