09 · Photovoltaic Efficiency

Solar Panel Cleaning

Every percent of soiling is lost electricity.

Yield loss

Every percent of soiling
is lost electricity.

Dirty solar modules measurably lose power. Pollen, bird droppings, dust and lichen build layers that block sunlight. Depending on location and season the yield loss grows over the months.

Light dust

After a few weeks without rain in exposed locations.

Pollen & smog

After spring pollen season or in urban environments.

Bird droppings

Localised, acidic residue that can damage the micro-coating.

Lichen & crust

After one or more years without cleaning, especially in agriculture.

Industry average, varies by location and installation

Solar Panel Cleaning

Ertrag zurück. Ohne Chemie.

Solar panel cleaning in Oftringen and throughout Switzerland. Dirty photovoltaic modules measurably lose output. Pollen, bird droppings, dust, lichen and smog form a layer that blocks sunlight. We clean your modules with deionized water and telescopic fiberglass poles from the ground, without climbing on the roof and without chemicals. The surface remains residue-free, the micro-coating intact. For single-family houses, multi-family roof systems, agricultural installations and commercial flat roofs. Annual cleaning recommended, additional after heavy pollen seasons or local environmental loads.

The best solar system is useless if the light does not arrive.

The process

Three steps. No roof access for you.

Site visit & quote

We assess the installation on site or via sent photos and provide a written fixed price with date proposal the same business day.

Cleaning on site

Telescopic from the ground or by boom lift depending on roof access. Material-friendly, no chemicals and no abrasives.

Completion

Modules clear and residue-free, micro-coating intact. On request a short documentation of the work performed.

Scope

What we clean. Every solar module.

01Deionized water, residue-free

02Telescopic poles up to 20 metres

03No chemicals

04Roof securing if needed

05For PV, solar thermal and hybrid

06Yield measurement before/after possible

For whom

Who benefits. From the first clean.

Single-family homes

Rooftop installations 4-15 kWp, annual cleaning in spring recommended for maximum yield.

Multi-family buildings

Shared installations with multiple owners, coordinated cleaning via property management.

Agriculture

Barn roofs and ground installations with high bird-droppings and dust load. Cleaning twice yearly.

Commercial flat roofs

Industrial and commercial installations where every lost kWh costs. Scheduled maintenance plans.

Common questions

What clients ask. Honest answers.

How often should I clean my solar system?+

For residential rooftops in Switzerland, annual cleaning in spring is usually enough. In agricultural settings or near forests, twice a year. Commercial installations where every kWh counts: quarterly or by yield-monitoring.

What does solar cleaning cost?+

Fixed price after site visit or detailed description. For residential installations typically 3 to 7 CHF per module depending on size and accessibility. Commercial installations by individual offer.

Do you use chemicals?+

No. We work exclusively with deionized pure water. No detergents, no abrasives. The modules remain residue-free and the micro-coating stays intact.

Do you climb on the roof?+

In most cases no. Telescopic fiberglass poles reach up to 20 metres from the ground. For large commercial installations we work from boom lifts or by roof access with proper safety harness.

Can you measure the yield gain?+

Yes, on request. We document the before/after yield via your inverter data. Typically 5 to 20 percent gain, depending on previous soiling.

What region do you cover?+

Base in Oftringen, with focus on the Aargau region, Mittelland and Central Switzerland. Larger commercial installations we service Switzerland-wide.

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