The economical production of hydrogen is an essential step towards the decarbonization of industrial sectors, including metals and alloys production processes. The available water electrolysis technologies used for hydrogen generation suffer from limitations, including the high voltage required in the electrolysis unit (typically > 1.8 V), reducing the energy efficiency of such processes and their compatibility with solar power systems. Here, the electrochemical generation of hydrogen in high-temperature molten salts at voltages as low as 1 V is discussed. Moreover, the utilization of the electrogenerated hydrogen for the in situ reduction of metal oxides into corresponding metals are evaluated using techniques such as voltammetry and constant voltage electrolysis operations combined with X-ray diffraction and electron microscopy examinations. To this end, the hydrogen generation in molten LiCl under humid atmosphere, and the hydrogen reduction of oxides of iron, nickel and cobalt in molten salt at the low-cell voltage of around 1.5 V are studied, and compared with each other. Moreover, the intermediates compounds formed during the reduction processes are identified, shedding light onto mechanisms involved in low-voltage green production of metals in molten salts.