Professional Solar Panel Cleaning in Blackburn

What dirties arrays around Blackburn and Darwen

Three things, mostly. Moss coming down off the roof tiles, which is a given on any shaded or north-facing roof under the west Pennine moors. Traffic film from the M65 and the main roads, which is greasy and bonds to the glass. And bird mess, which is the worst of the lot because it is dense, acidic and lands in exactly the wrong places.

The pattern we see on most Blackburn roofs is a dark line along the bottom edge of each panel where rain has drained to the frame and left everything it was carrying. That strip shades the bottom row of cells, and thanks to how panels are wired internally the output loss is much greater than the area suggests.

Why you cannot leave it to the weather

Rain rinses loose dust and leaves the bonded film, then deposits the rest at the frame. More rain means a heavier line, not a cleaner array. Nothing about a wet Lancashire winter cleans a solar panel.

The method: pure water, soft brush, from the ground

We use purified, deionised water and a soft brush on a pole, working from the ground. No chemicals, no detergents, no pressure washing and no walking on panels. Deionised water dries without leaving spots because there is nothing in it to leave behind.

Nothing abrasive touches the glass and nothing is forced around the seals, which is what manufacturers specify in their maintenance guidance and what protects your warranty.

Clean the roof at the same time

On a mossy roof, cleaning the panels alone lasts about a season. The growth on the tiles keeps washing down onto the array. Doing roof cleaning in Blackburn and the panels together is the sensible order and works out cheaper than two visits.

It is also worth clearing the gutter below the array while the kit is on site, because that is where the moss ends up.

Birds under the panels

The gap between the panels and the tiles is dry and sheltered, and pigeons will nest there. Once they do you get mess down the panel faces, blocked gutters and noise. Perimeter mesh after a clean is the permanent fix.

Frequency

Once a year suits most arrays in Blackburn and Darwen. Twice if the roof is under trees, if it is heavily shaded, or if there is a pigeon or gull problem nearby.

Book it for late winter or early spring if you are only doing it once, so the array is clean for the high generation months rather than being cleaned after them.

Pricing

Panel count, roof height, access. Those three set the price. Send us the number of panels and your postcode for a fixed quote, usually the same day, and tell us if you want the roof or gutters doing at the same time so it can be priced as one visit.

What we report back

While cleaning we keep an eye on the condition of the array: cracked glass, clouding, a panel sitting proud, failed bird proofing, branches growing into the shading line and the state of the gutter underneath. You get told, at no extra cost, and you can decide what to do about it.

Electrical parts are left to your installer. We clean glass, we do not touch inverters or isolators.

Questions people ask before booking

Is it safe? Pure water and a soft brush, no chemicals, no pressure, nobody on the panels. That is the manufacturers own guidance.

How much will it help? On an array that has never been cleaned, a lot. On one done last spring, less. Either way the bottom edge line is where most of the gain comes from.

Do I need to be in? No, as long as we can reach the property and get to an outside tap if needed. We will send photos when it is done.