A thermo-electrochemical system for generating an electric current comprising (a) an electrochemical cell with a cathode compartment and an anode compartment separated by a common separator wall; (b) an anode and a cathode situated in the respective compartments with connections outside the cell for generation of an electric current; (c) a cathode soln. comprising a conc. aq. soln. of a selected strong Bronsted acid (I) in the cathode compartment in contact with the cathode, whereby during generation of the electric current hydrogen ions are consumed at the cathode and hydrogen gas and a first cell reaction prod. (II) are formed; (d) an anode soln. comprising a soln. of a selected relatively low melting molten salt (III) in contact with the anode in the anode compartment, whereby the anion of the (III) reacts with hydrogen gas to lower the hydrogen ion concn. in the anode compartment with formation of a second cell reaction prod. (IV), and whereby the cation of the (III) is capable of being decomposed by heat with formation of hydrogen ions; (e) thermochemical regeneration means for the thermal conversion of the (II) into (I) and a regeneration prod. (V) which serves as an intermediate prod.; (f) means for transferring the cathode soln. contg. the (II) from the cathode compartment to the thermochemical regeneration means; (g) cathode recirculation means to transfer the (I) formed in the thermochemical regeneration means to the cathode compartment as replenishment for the (I) consumed during the generation of the electric current; (h) means for chemically combining the (IV) from the anode compartment with the intermediate prod. (V) from the thermochemical regenerator to form the molten salt; (i) means from removing the heat evolved during the chemical combination step ''h''; (i) means for transferring the (V) to the means for chemical combination; (k) means for transferring the anode soln. contg. the (IV) to the means for chemical combination; and (l) anode recirculation means for transferring the salt formed by chemical combination to the anode compartment as replenishment for the molten salt consumed during the generation of electric current.    USE/ADVANTAGE -   The system provides an electrochemical cell for generating an electric current in which the electrolytes consumed during current generation are regenerated by input of thermal energy. By providing storage reservoirs for regenerated electrolyte, the cell can be made to generate current continuously during periods when there is no input of thermal regenerating energy, e.g., during the night when the heat source for regeneration is solar power.