Solar Panel Cleaning on Gran Canaria

Solar panel cleaning on Gran Canaria: calima, salt air and the yield on your roof

Dust is not a side issue for a photovoltaic array on Gran Canaria. During a calima, fine Saharan dust settles on the modules; near the coast a film of salt is added, and around the farmland in the south-east the air is rarely clean anyway. Dirty modules produce less electricity — and uneven soiling such as a bird dropping or a band along the lower edge of a panel costs more yield than an even layer of dust, because it shades whole strings of cells.

The businesses listed here clean and maintain existing systems: a single hot-water collector on the azotea, a community’s array, or a full module field on a hotel roof. The work is done with soft water and a brush rather than pressure washers and harsh chemicals, and in the cool early hours. Before you book, ask about fall protection and liability insurance — this work is almost always on the roof.

Frequently asked questions

How often do solar panels need cleaning on Gran Canaria?

It depends on the location: proximity to the coast, farmland or a building site next door soils the modules faster than an open position inland. A good indicator is the yield reading on your inverter — if it drops over several weeks in comparable weather, dirt is usually the cause. After a heavy calima it is always worth a look at the roof.

Does the rain not wash the panels clean by itself?

In the south and east of the island it simply does not rain often enough. And a brief shower after a calima does not wash the dust off, it spreads it: the water dries into rims and streaks, often leaving more on the glass than before.

What should never happen during a clean?

No pressure washer, no abrasive or aggressive cleaners and no walking on the modules — that can cause microcracks in the cells and void the manufacturer’s warranty. Hard tap water also leaves limescale marks as it dries, which is why many firms work with demineralised water.