A preserved farmhouse from 1814 in the town of Münzingen in the canton of Bern has been converted into a modern apartment complex with solar panels on the entire roof. The solar panels, supplied by 3S Swiss Solar Solution, cover the entire roof surface and produce more energy than the building consumes. The owner, Ueli Zaugg, decided to install the system due to the energy crisis. The solution has won the Swiss Solar Prize in 2023, reports the Swiss newspaper Der Bund.
The converted farmhouse now houses six apartments and a flower shop, and is a plus-energy building. The solar cells produce almost 80,000 kWh annually, while the building's consumption of electricity, hot water and heating is only 55,000 kWh. This gives an energy surplus of approximately 140 percent of the total consumption.
- It was clear to me that our very large roof should be used for solar energy. Anything else would have been irresponsible in times of energy crisis, says Ueli Zaugg, who owns the building.
The solar cell system is a so-called "Indach" solution, where the solar cells replace traditional roof tiles. The solution was part of an extensive renovation of the listed building, which required approval from the local authorities.
At the same time, investments were made in other sustainable initiatives, such as rainwater collection for the shop and the garden. Overall, the renovation cost "a high single-digit million" in Swiss francs. In Danish kroner, this means that the entire renovation may have cost approximately seven million. franc, which corresponds to 55.6 million Danish kroner.
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