Global energy systems are currently undergoing tremendous and multifold challenges. This ‘energy transition’ towards a non-fossil fuel energy system can be best described along three, mutually reinforcing strategic trends: decarbonization, digitalisation and decentralisation. Digitalisation has manifold impacts on energy suppliers, distributors and consumers as it provides opportunites for efficiency and sustainability, but also bears security threats. This study by Dr. Frank Umbach provides a comprehensive view on the impacts of digitalisation on the global energy system.