Green energy for home use

The housing estate Berliner Ring with its high rise buildings was constructed in the 1960s. The over 700 flats are owned by individual owners and not by a single company. This was a special challenge for installing the solar system in 2004–2006, as each owner had to agree with the solar installation.

SOLID built the systems (2450 m2) step by step in parallel with the roof renovations. Overall hot water supply for 756 residential units in 22 buildings. There is sophisticated feed-in system for solar heat: first it supplies the building underneath the collectors. When the building’s demand is satisfied, other buildings of the housing are supplied via the heating grid. When these are also satisfied, the heat is stored in two tanks with 60 m³ in total.