Solidarenergie e.V. supports social and cultural projects. The association looks for companies, private persons, or institutions that would like to rent their roofs to the EWS (Elektrizitätswerke Schönau), a clean power production company. EWS installs photovoltaic cell systems on the rented rooftops where the produced energy is completely supplied to the grid. The income is being spent on social and cultural engagement in the region of Freiburg.