Solar panel cleaning in Dénia

Saharan dust (calima), sea salt and limescale from hard water leave a film on the glass that scatters light. Panels produce less well before they look dirty. Cleaning removes that film.

With demineralised water, which dries without limescale, so there's no scrubbing and no scratches on the glass. We use a soft brush on a telescopic carbon pole and never step on the panels.

No detergents and no pressure washer on the panels, just demineralised water and a soft brush on a pole. That's the cleaning manufacturers usually ask for, so it shouldn't cause warranty problems.

On the coast, a few times a year, plus an extra clean after heavy calima. The dust sticks to the glass once the dew settles, and rain rarely washes it off.

It depends on how dirty they are, their tilt and how long since it last rained, so we won't give you a made-up percentage. The best way to know is your own inverter app: compare output for a few days before and after the clean, in similar weather.

Use the calculator on this site to see the price for your number of panels.