Because sustainable development requires climate-friendly economic development, the share of renewable energy in the global energy mix is to be significantly increased and the global rate of increase in energy efficiency is to be doubled. Villiger has consequently set itself the goal of gradually converting the infrastructure in Oberrüti to a renewable energy supply. For example, we have a sensor-controlled LED lighting system and a photovoltaic system on our company roof. Finally, we are also incorporating this philosophy into our products. The conversion of light energy into electrical energy is implemented in disposal systems to operate intelligent access systems.