Solar panel cleaning: how to clean solar panels, cost and how often (Costa del Sol)

Looking for solar panel cleaning near you on the Costa del Sol? This is what a professional solar panel cleaning service costs, how often panels need cleaning in southern Spain, and the best way to clean solar panels without damaging them.

On the Costa del Sol dirt does not wash away by itself. It rarely rains, and when it does after a calima event the dust turns into mud on the glass. On the systems we inspected this week between Málaga and Marbella we again measured double-digit output losses before cleaning.

How much you lose

On average 10 % to 25 % of output on a system left uncleaned for a year. Near the sea, salt forms a greasy film; near palms and pines, leaves and resin add hard shading that triggers bypass diodes.

How we clean

• Demineralised water at low pressure, no limescale, no marks
• Soft brush that protects the anti-reflective coating
• Output reading before and after, with photo report
• Never a pressure washer or detergents: they cause microcracks and void the warranty

When to clean

Ideally between March and June, after the calima season and before the highest-radiation months. Beachfront homes or gardens with pines benefit from a second clean in autumn.

Prices and coverage on our solar panel cleaning page, or take the maintenance contract which includes the annual clean.

## Related searches **Solar panel cleaning near me**, **solar panel maintenance Malaga**, **solar cleaning cost Spain**. See our [maintenance and cleaning plan](/mantenimiento-limpieza-placas-solares) and the [Care](/care) service. ## Where we work across Málaga province We work with our own crew from Coín, so the same schedule covers solar panel installations in Marbella, Estepona, Málaga city and Torremolinos, self-consumption in Vélez-Málaga and solar energy across the Axarquía, plus inland towns: Cártama, Coín, Alhaurín de la Torre and Alhaurín el Grande. On the coast we size for air conditioning and the pool; inland we always add outage backup with a [Deye hybrid inverter](/inversor-deye) or, on shaded roofs, [Huawei with optimisers](/inversores-huawei).

How often should you clean solar panels?

Once a year as a minimum in Málaga province, twice a year within two kilometres of the coast or after a heavy calima season.

What does solar panel cleaning cost?

From 150 EUR excluding VAT for a standard domestic roof, including an output reading before and after and a photo report. Larger roofs, steep pitches and difficult access are quoted per job.

What is the best way to clean solar panels?

Demineralised water at low pressure with a soft brush, early in the morning. Never a pressure washer, never detergents, never cold water on hot glass.

Do solar panels need cleaning?

In northern Europe rain does most of the work. In Málaga province it does not: calima dust, salt and pollen build a film that rain turns to mud. Yes, solar panels here need cleaning, normally once a year and twice near the coast.

What to clean solar panels with

Demineralised (osmosis) water and a soft telescopic brush. Nothing else. No detergent, no glass cleaner, no vinegar, no pressure washer, and never cold water on hot glass. Washing solar panels with hard tap water leaves limescale that shades the cells all summer.

Is it worth cleaning solar panels?

On a 5 kWp system a 15 % loss is roughly 1,100 kWh a year, around 250 EUR of electricity at 2026 prices. A cleaning visit from 150 EUR excl. VAT pays for itself in the first season, which is why cleaning PV panels is the cheapest yield improvement there is.

Solar module cleaning as a service

We do solar module cleaning across Málaga, Marbella, Estepona, Fuengirola, Coín, Nerja and Vélez-Málaga with our own crew: output reading before and after, a photo report, and the inverter checked in the same visit. See real jobs with photos and prices on our case studies.