A method of storing, transporting and supplying electrochemical energy using an electrochemical reactor with the reactants alkali metal and sulfur in an electrochemical power station, wherein, at a location where energy is required, 1.) at least one stock container B1 comprising high-purity liquid sulfur and at least one stock container B2 comprising liquid high-purity alkali metal are provided, 2.) at least one electrochemical alkali metal/sulfur reactor is provided, with this reactor comprising at least the following components: 2.1 a negative compartment A for accommodating liquid alkali metal, 2.2 a positive compartment K for accommodating liquid sulfur, where 2.3 the compartments A and K are separated by a solid electrolyte E which at the operating temperature of the cell is permeable to cations formed by oxidation of the alkali metal, 2.4 electrodes for closing an external current circuit for the electric power generated by the reaction of the alkali metal with the sulfur, 3.) stock container B2 is connected to the negative compartment A and stock container B1 is connected to the positive compartment K with introduction of liquid alkali metal into the negative compartment A and of liquid sulfur into the positive compartment K, 4.) the external current circuit is closed, resulting in oxidation of the alkali metal, formation of alkali metal sulfides in the cathode space K and flow of electric current, 5.) alkali metal sulfides formed in the cathode compartment are taken off and collected in a stock container B3, 6.) alkali metal sulfides collected in the stock container B3 are transported to a second electrochemical cell at a location having a high energy availability and are electrolyzed in the electrochemical cell to form sulfur and alkali metal, in particular high-purity sodium, 7.) at least one of the components sulfur and alkali metal obtained in step 6 is transported to a location where energy is required and fed into an alkali metal-sulfur power station configured as power generator, where sulfur, alkali metal and alkali metal sulfides are each stored in separate, heated stock containers. 1.) at least one stock container B1 comprising high-purity liquid sulfur and at least one stock container B2 comprising liquid high-purity alkali metal are provided, 2.) at least one electrochemical alkali metal/sulfur reactor is provided, with this reactor comprising at least the following components: 2.1 a negative compartment A for accommodating liquid alkali metal, 2.2 a positive compartment K for accommodating liquid sulfur, where 2.3 the compartments A and K are separated by a solid electrolyte E which at the operating temperature of the cell is permeable to cations formed by oxidation of the alkali metal, 2.4 electrodes for closing an external current circuit for the electric power generated by the reaction of the alkali metal with the sulfur, 2.1 a negative compartment A for accommodating liquid alkali metal, 2.2 a positive compartment K for accommodating liquid sulfur, where 2.3 the compartments A and K are separated by a solid electrolyte E which at the operating temperature of the cell is permeable to cations formed by oxidation of the alkali metal, 2.4 electrodes for closing an external current circuit for the electric power generated by the reaction of the alkali metal with the sulfur, 3.) stock container B2 is connected to the negative compartment A and stock container B1 is connected to the positive compartment K with introduction of liquid alkali metal into the negative compartment A and of liquid sulfur into the positive compartment K, 4.) the external current circuit is closed, resulting in oxidation of the alkali metal, formation of alkali metal sulfides in the cathode space K and flow of electric current, 5.) alkali metal sulfides formed in the cathode compartment are taken off and collected in a stock container B3, 6.) alkali metal sulfides collected in the stock container B3 are transported to a second electrochemical cell at a location having a high energy availability and are electrolyzed in the electrochemical cell to form sulfur and alkali metal, in particular high-purity sodium, 7.) at least one of the components sulfur and alkali metal obtained in step 6 is transported to a location where energy is required and fed into an alkali metal-sulfur power station configured as power generator,