A thermoelectrochemical system in which a continuous electrical current is generated from a heat input below about 250.degree. C. A hydrogen ion reacting cathode is immersed in a chosen Bronsted acid and a hydrogen ion reacting anode is immersed in a chosen Bronsted base. Reactants consumed at the electrodes during the electrochemical reaction are directly regenerated thermally below about 250.degree. C. and recycled to the electrodes to provide continuous operation of the system.