In the future, production of energy from renewable sources will have to be complemented by different technologies of decentralized energy storage, as fluctuations in production will have to be compensated for. Hydrogen will play an important role both as energy vector and storage material, either in its molecular form or as part of hydrogen rich secondary molecules. Formic acid, containing 53 g/l of hydrogen is a promising candidate for such a secondary storage molecule. This project was dedicated to the combination of a formic acid-to-hydrogen generator with an industrial PEM fuel cell system. The main focus lays on the integrational details, concerning both the constructive and the process control level as well as the energetic integration of the two processes. System operation and stability using the primary 50/50 H2/CO2 reformate gas under steady state conditions, as well as its dynamic performance during start-up and shut-down were characterized. The synergetic potential of these two technologies promises to result in a competitive and efficient industrial process.