Method for operating a reversible fuel cell system with metal hydride storage, reversible fuel cell system and use of same

The method involves splitting water in an electrolyzer (22) into hydrogen and oxygen and is stored in separate storage containers (25,26). The hydrogen and oxygen in a fuel cell (27) is converted into electrical energy (28), such that hydrogen is stored in a metal hydride storage container (26). An independent claim is included for reversible fuel cell system.