Find here the answers to the most popular questions

Is it possible to put standard tiles next to Freesuns tiles?

Yes. For each of our tile types, there is a standard non-solar equivalent. For example, our Solaris™ Classic tiles are compatible with Eternit Vulcanit N 6650, SVK Alpina or SVK Planalp tiles.

Can I have only one side of the roof covered with solar tiles?


Is the roof hail resistant?

Yes. Our tiles are resistant to 50 mm ice balls (HR5), which is the maximum degree of resistance to hail according to the rules of the Association of Cantonal Insurance Institutions ( Noise is attenuated by the mass of the tiles in the same way as for traditional clay tiles.

Can Freesuns tiles withstand 1.5 meters of snow?

Yes, Freesuns tiles can withstand a load of 5400pa. Moreover, the tiles being smooth, after a snowfall, the snow slides quickly and allows the solar tiles to catch the sun's rays again.

What is the weight of the tiles?

Our solar tiles weigh 50 kg per m2. Conventional roof structures can support this weight without any special adaptation.

Can we walk on the roof?

Yes. On sloping roofs, there is 24 mm of glass thickness. It is therefore resistant.

What is the life span of Freesuns tiles?

Freesuns solar tiles are made with two layers of glass, for a total of 7 mm thickness. Since 3 tiles are installed on top of each other, the whole is very resistant. The tiles are designed to last more than 50 years.

How do I know if my roof is suitable for photovoltaic panels in terms of sunlight?

You can visualize the photovoltaic potential of your building on the website of the Swiss Federal Office of Energy.

Where does the electricity come from when the sun is too low or at night?

When the sky is not clear enough to produce solar energy, the grid takes over. In these cases, instead of consuming the electricity produced by your solar tiles, you consume the one of your energy supplier, via the electrical network.

How are Freesuns tiles installed?

Our solar tiles are installed like Eternit clay tiles, with the double overlapping technique. After a special training with our team, conventional roofers can carry out the the installation.

Where are Freesuns roof tiles made?

Like all solar manufacturers, our tiles are made in China. We are currently working on repatriating the production to Europe.

Can I sell my surplus electricity back to the grid?

Yes, the installation is designed for this purpose.
If you decide to install battery storage, the batteries will have priority over resale to the grid.
If you don't have batteries, all surplus electricity is automatically sold back to the grid.

With a solar roof, can I be completely self-sufficient in energy?

A solar roof allows you to produce more than you consume, and this during a good part of the year. Nevertheless, in winter, the production will not allow you to cover all your needs. Our customers with the most efficient roofs and storage batteries cover up to 80% of their annual needs.

What are the grants and tax deductions?

There are several financial programs that allow you to reduce the amount of your investment.

The federal subsidy PRU (Petite Rétribution Unique - Small Single Retribution)

The federal government supports independent producers of photovoltaic energy with a one-time payment. For installations of up to 100 kWp (approx. 550 m²), we speak of the Small Single Payment (Petite Rétribution Unique - PRU). It consists of a single payment of financial aid. The institution in charge of paying this subsidy is Pronovo ( The Freesuns team can help you apply for it.

How to calculate the amount of the federal subsidy (PRU)?
The PRU is up to 30% of the investment. It consists of a basic contribution and a variable contribution depending on the installed capacity. Both contributions change over time. The amount of the PRU depends on the commissioning date, the power and the type of installation (added/integrated). Pronovo has set up an online calculator to facilitate the calculation of the PRU for your photovoltaic project:

Other subsidies
Some municipalities provide additional funding: check with the municipality where the building is located. All subsidy programs of the federal government, cantons, cities and municipalities are listed here

Tax deduction
In case of renovation, you are likely to be eligible for a tax deduction. We recommend that you consult your trustee on this subject.

What is the delivery time?

The delivery time is about 20 weeks, after signing the contract, and as soon as the first deposit is received.