The principle of chemical hydrogen storage is to use energy generated in an energy-rich location to convert the low-energy form of the carrier material in a chemical reaction with energy, e.g. B. electrolytically produced hydrogen to load. The medium stores its chemical energy by enriching it with hydrogen. This hydrogen-enriched material can be stored over long periods of time without loss, transported and distributed with a high energy density. At the place and time of the energy demand, the high-energy form is energetically discharged with the release of hydrogen and returned to the place of energy generation. There it is ready for renewed energy absorption.

This allows power fluctuations to be absorbed when generating energy. Thus, the energy originally available as electrical power can be stored, transported and z. B. in connection with fuel cells can be converted back into electricity. With suitable integration of the corresponding storage system, for example in residential buildings, the waste heat from the process can be used to heat the building.