Which Solar Panels Are Suited for the Swiss Climate?
Many homeowners in Switzerland wonder: is a solar system really worth it when the weather is often cloudy, cold or snowy? The answer surprises many: modern photovoltaic systems work reliably in snow, fog and low temperatures — and in some cases even better than in warmer cantons.
950 to 1'000 kWh/kWp
Production on the Plateau
annual indicative range
25 to 30 years
Module lifespan
Indicative values, updated September 2026. Sources: Pronovo, ElCom, Swissolar.
Winter operation
What happens to solar modules in snow and cold weather?
Snow
Snow on modules briefly reduces production. On sloped roofs, snow generally slides off quickly — the modules themselves help by releasing a small amount of heat. After a snowfall, the system is usually back to full output within hours.
Cold
Photovoltaic modules actually work more efficiently in cold weather than in heat. Above around 25°C, efficiency drops slightly. In the cool Swiss spring and autumn, modules often operate at peak performance.
Fog
In fog, production is reduced but not zero. Diffuse light is still partially converted into electricity by modern modules. High-performance monocrystalline modules have a particular advantage here.
Tip: Read our detailed article on solar panels in winter with concrete production figures and the 2026 winter bonus.
Module selection
Which modules are particularly well suited to Switzerland?
Not all modules are equally well suited to the Swiss climate. These characteristics matter:
Monocrystalline Modules
The most common choice for Switzerland. High efficiency even in diffuse light, robust and durable. Ideal for the Plateau and Pre-Alps.
Bifacial Modules
Also generate electricity from the rear — particularly useful when snow reflects light onto the back of the panels. Interesting for snow-heavy cantons.
Low Temperature Coefficient
The lower the temperature coefficient, the better the performance in cold weather. Especially relevant for high-altitude locations in Switzerland.
Solar worth it everywhere?
Is solar worthwhile in all Swiss cantons?
Yes — even in less sunny cantons, a solar system pays off. Here is why:
- Electricity prices in Switzerland are high
- The federal subsidy (one-time payment OTS) applies throughout Switzerland
- Modern modules produce efficiently even in diffuse light
- The payback period is 9 to 13 years on the Plateau
In Ticino and Valais, the indicative payback period is 7 to 11 years. On the Plateau, it is 9 to 13 years.
Check now whether solar is right for your roof
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Frequently asked questions
Frequently Asked Questions
Do solar panels work on cloudy days?+
Yes. Modern modules produce electricity even under an overcast sky, though with reduced output. Diffuse light is partially converted into energy.
Do I need to clear snow from my panels?+
Generally no. On sloped roofs, snow slides off quickly. Clearing is usually unnecessary and can damage the modules.
Do solar panels produce electricity in winter?+
Yes, but less than in summer. A well-dimensioned system still makes a useful contribution in winter.
Are solar modules winterproof?+
Yes. High-quality modules are designed for temperatures down to -40°C and withstand snow loads of several hundred kilograms per square metre.
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