Solar Panel Cleaning in Sussex

Industry pricing in 2026 averages around £15 per panel. For a typical 10-panel residential system that is £150 minimum, often £200–£250 with access factored in. Cleaning around 40 panels at ground level is £60–£100. Cleaning around 40 panels above one storey is £150–£300. Larger properties, properties needing scaffold access, or commercial installs are quoted separately.

For most Sussex homes, every 2–3 years is the right cadence. Coastal properties (Worthing seafront, Brighton, Hastings, Bognor) and homes near tall trees benefit from annual cleaning. Brighton homes with significant seagull activity often need cleaning every 12–18 months. New installs in their first year usually do not need cleaning unless something specific has happened (storm debris, scaffold dust, builder mess from adjacent work).

Not when done correctly. The professional standard — water-fed pole with deionised water and a soft brush — is the method specified by major panel manufacturers including JA Solar, Longi, REC, Trina and SunPower. It is fully warranty-safe. The cleaning methods that do risk damage are pressure washing (can lift the panel laminate), abrasive scrubbing (scratches the AR coating), harsh chemicals (degrades the seals around the junction box) and walking on the panel surface (causes microcracks). We do not use any of those.

Most residential solar panel installations in Sussex are completed within a single day. For larger systems, or where battery storage is being installed at the same time, the work may extend to two days. We coordinate all scaffolding, panel installation, electrical connections, and system commissioning as part of the service.

Solar panels generate electricity from daylight, not just direct sunshine, so they continue producing energy even when the sky is overcast. Output on a heavily cloudy day will naturally be lower than on a bright, clear day, but your panels will still contribute useful electricity. Rain alone is not enough to keep panels clean. Rain washes off dust but leaves behind dried bird droppings, pollen smears, salt residue and any greasy deposits — the things that actually block sunlight. Many homeowners assume rain will do the job; the generation data after professional cleaning consistently disproves this.

Today’s solar panels are built to last. Most come with a 25-year performance warranty from the manufacturer, and in practice many systems continue operating efficiently for 30 years or more. Inverters typically carry a 10–12 year warranty and may need to be replaced once during the overall lifetime of your system. Beyond that, solar panels require very little maintenance.

The Smart Export Guarantee is a government-backed scheme that pays you for any surplus solar electricity you export to the national grid. Your energy supplier pays you a rate per kilowatt-hour for the energy you do not use yourself. Current rates typically range from 4p to 15p per kWh depending on the supplier and tariff you choose. While the income is modest, it provides a useful additional financial return on your solar investment.

Yes — particularly for older systems and coastal properties. A typical 4kW system that has gone 3 years without cleaning will be 10–15% dirty, losing around £65–£90/year. Recovering that with a £150–£250 clean pays back within 2–3 years and the cleaning lasts that long anyway, so it is essentially free over the system life. The only cases where we would not recommend cleaning are very new systems (under 12 months) or systems where visible inspection from the ground shows no significant fouling.

Yes, adding a battery at a later date is entirely straightforward. When we install a solar PV system, we design the electrical setup with future battery integration in mind, so upgrading is a simple process when the time comes. Many of our customers in Sussex choose to install panels first and add storage once they have seen the benefits and saved some additional funds.

We understand that solar panels represent a significant investment, and we can discuss flexible payment options to help make the cost more manageable. Please get in touch with us to find out about current finance arrangements available to Sussex homeowners.

The ideal system size depends on your household electricity consumption, the amount of suitable roof space you have, and your budget. As a general guide, a 3–4kW system is typically appropriate for smaller households of one to three people, while households of four or more people usually benefit from a 5–6kW system or larger. We determine the right system size for you during our free site survey, using your actual energy data to ensure an accurate recommendation.

Getting started is easy. Call us on 01273 455 695 or complete our online enquiry form to arrange a free, no-obligation site survey. We will visit your Sussex property, assess your roof and energy usage, talk through the options, and provide a personalised quote — all completely free of charge.