If you compare the storage of electricity in hydrogen with the storage in a battery, you come to the conclusion that there are higher losses with hydrogen due to the conversion steps (electrolyzer and fuel cell). To properly qualify this, the future of the overall energy system must be considered. Due to the steadily growing share of fluctuating renewable energies, green electricity must be made storable and transportable in situations of over- and underproduction. To meet the global energy demand for clean electricity, it will be necessary to transport green electricity from countries with favourable conditions for green electricity production to industrialized countries with less favourable conditions for green electricity production, where larger quantities can be produced at significantly lower prices due to higher efficiency. Green hydrogen will thus be needed as an energy source in any event and will thus be available for use in fuel cell vehicles. For economic analysis, the factors of charging time, investment in infrastructure and flexibility must also be taken into account.