The reduction in CO2 emissions leads to a change in drive systems in the mobility sector. While a clear trend towards electrification by means of battery electric systems (BEVs) can be seen in the passenger car segment, the picture is different for light and heavy commercial vehicles. With fuel cells, electrical energy is generated on-board. In contrast to the BEV, this reduces weight and charging time, which is important in the commercial vehicle segment. As part of this work, Segula Technologies developed a multiphysical simulation tool for fuel cell system specification and control. Explore this holistic approach to modeling mechanical, electrical, hydraulical, and control systems with potential technical limitations as well as simulating performance. See examples of how to master these challenges using this tool.