SolarInput is the network for photovoltaics, solar thermal energy and sustainability based in Erfurt. It was founded in 2003, is one of the pioneers in the solar industry and is a major contributor to the energy transition. The network, consisting of companies, research institutions, universities, colleges and municipalities, has set itself the goal of CO2 reduction in all activities and projects; to support the network partners in their innovative and economic power. On the one hand, the development of national and international R&D cooperations in our five main areas is in the foreground. On the other hand, ongoing dialogue with politicians to support the energy transition is important.