The subject matter of the invention is an arrangement of an electrical power generating system in an electrical vehicle. The electrical power generating system has a first module (2) for preprocessing and metering of the gases to be supplied to a fuel cell, a second module (4)with the fuel cell, and an electrical power distribution module (15). The first module (2) and the second module (4) are mounted in a container (9). The unit comprising the container with the two modules is installed in the electrical vehicle from underneath, in a cavity provided for this purpose. The electrical power distribution module (15) is then attached to the outside of the container.