Dr. Peter Fath, CEO of RCT Solutions GmbH Konstanz, reports first-hand on the processes used in the industrial production of solar cells. After a short introduction to the physics of a solar cell, the complete industrial value chain is covered. The lecture starts with the production of crystalline and microcrystalline silicon and wafer production. Subsequently, all steps of industrial solar cell production are worked out. The main focus is on the standard processes used in industry. In addition, the latest developments and their significance for industrial production are taken into account. In addition to production, industrial characterization and its significance will be discussed. Part of the lecture is an excursion to several well-known companies of the solar industry.