German industrial companies are currently suffering from the sharp rise in the cost of fossil fuels and electricity. Such massive price increases are a looming threat to the existence of energy-intensive industries. The Fraunhofer Institute for Solar Energy Systems ISE makes use of its expertise to help companies decrease the energy consumption at their sites, and thus lower costs and reduce greenhouse gas emissions. A key success factor here is Fraunhofer ISE’s holistic consideration of the production processes and energy flows, as a current project with a company from the corrugated cardboard industry shows.