The refurbishment of the Weyerguet Farm in Wabern, Germany, is a clear example of solar architecture on a historical building in an agricultural zone. The farm, originally built in 1842, was transformed into a condominium with 9 apartments and common areas, equipped with a photovoltaic system integrated into the roof. Before the refurbishment, the building consumed approximately 213,600 kWh/year. The energy efficiency measures adopted (insulation of the roof, walls and floor, new windows, and geothermal heat pumps) led to a reduction in the overall electricity requirements of almost 80%. Thanks to the energy efficiency works and solar architecture carried out, the building was awarded the 2020 Swiss Solar Prize.

Source: 3S Solar Plus AG, Schweizer Solarpreis 2020