Course unit contents The course addresses the critical challenge of optimally integrating new renewable energy units into existing energy systems and networks to drive the transition toward a decarbonized future. It focuses on the concept of "Multi-Energy Systems" (MES), where different energy carriers interact to increase system flexibility and accommodate higher shares of renewable energy. These interactions occur through various energy conversion, storage, and consumption units. Shifting the approach from optimizing individual units as separate entities to optimizing the design and operation of an MES as a whole is pivotal to achieving greener energy systems in a more cost-effective, [...]