Feldheim in the district of Potsdam-Mittelmark (Brandenburg) is the first energy self-sufficient place in Germany. Over the years, a considerable number of wind turbines have been installed on the surrounding open spaces. After we had already been commissioned with the construction of the wind farm foundations, we were then entrusted with the installation of eight prefabricated concrete towers. They help the resulting E-115 type plants from the manufacturer Enercon to achieve a hub height of 147 m.