Professional Solar Panel Cleaning in Preston

What lands on panels around Preston

Preston sits between the Ribble estuary and open farmland, and both leave their mark on solar panels. From the estuary side it is gulls, and gull mess is the worst thing that can land on an array: dense, acidic and large enough to black out whole cells. From the farmland side it is soil dust during dry spells and spraying, which settles as a fine film that rain turns into a streaky mess rather than washing off.

Add the motorway traffic film from the M6, M55 and M65, and the moss that comes down off tiles on shaded roofs, and you have four different sources of soiling on the same panel. That is why arrays here rarely stay clean on their own.

Why the losses are bigger than they look

Panels are wired in strings, and cells within each panel are grouped behind bypass diodes. Shade one group properly, with a gull dropping or a band of moss along the bottom frame, and you lose far more than the area covered. A panel that looks slightly grubby from the garden can be costing you a noticeable slice of the array output.

The line of dirt along the bottom edge of every panel, where rain drains to the frame and stops, is the place to look. If you can see it from the ground, it is affecting generation.

The method we use

Purified, deionised water and a soft brush on a telescopic pole, always from the ground. No chemicals, no detergents, no pressure washing and nobody walking on panels. Deionised water leaves nothing behind as it dries, so there is no spotting and no film for the next lot of dust to stick to.

It is also the method the panel manufacturers specify in their maintenance documents, which protects the warranty. Full detail on the solar panel cleaning page.

New estates, farm roofs and commercial arrays

A lot of the newer housing around Preston, Fulwood, Cottam and Penwortham went up with panels as standard, and most of those arrays have never been touched since handover. Farm buildings out towards Longridge, Goosnargh and the Fylde carry much larger arrays that are usually dirtier, because of the dust and the bird activity.

Commercial roofs at Walton Summit, Red Scar and Bamber Bridge are cleaned the same way but planned around the site. See commercial cleaning in Preston.

Moss, gulls and doing the job in the right order

Where the roof itself is mossy, do roof cleaning in Preston at the same visit, otherwise the growth is back on the array within a season. The gutter underneath is worth clearing at the same time.

Where gulls are the problem, the answer is frequency plus proofing. Their mess etches into the glass coating if it sits through a hot spell, so getting it off promptly matters more here than it does inland.

How often and when

Once a year for most domestic arrays. Twice for farm buildings, anything under trees, and anywhere with a serious gull or pigeon problem. Late winter or early spring is the best single slot, so the panels are clean going into the strongest generating months.

What it costs

Number of panels, height, access. Send the panel count and your postcode and you will get a fixed price, usually the same day. Farm and commercial arrays are surveyed first and quoted with the scope written down.

What we check while the array is being cleaned

We report what we can see: cracked or clouded glass, panels that have shifted, proofing that has come away, vegetation growing into the shading line and the state of the gutter under the array. On farm and commercial roofs we will also flag anything obvious around the array edges.

We do not work on anything electrical. Inverters, isolators and cabling are for your installer.

Questions we get asked around Preston

Does gull mess really matter that much? Yes. It is dense enough to block cells completely, and if it bakes on through a summer it is harder to remove and can mark the coating. Regular cleaning is cheaper than the alternative.

Will cleaning void the warranty? No, the opposite. Manufacturers expect panels to be kept clean, and they specify pure water and soft brushes, which is exactly what we use.

Do you need roof access? No, it is done from the ground with poles.