After replacing all their windows, doors and the roof, as well as insulating the walls of their home, 40 PV modules were installed on the west-facing part of their roof. A solar inverter, which is the true heart of a PV system, was also installed in no time.
“We decided to use the entire area of the roof—despite the trend toward smaller systems. Basically, the system’s output—and therefore production—will be adapted to the home’s consumption needs. The price of PV systems has been falling for several years and is reflected in the affordable deals being offered by installers,” explains Kai. The slightly excessive size of the PV system does not bother either of them. Ultimately, you never know what the future will bring: “There may be children at some point, which could mean higher power consumption,” says Jana. But there may also be a system upgrade to include a storage solution. “Having a smart home is awesome,” adds Kai.