A method of storage and redistribution of electrical energy comprising the steps of: producing hydrogen and oxygen through water electrolysis in an electrolyzer (1) operating under pressure; collecting the hydrogen and oxygen so obtained in respective pressurized tanks (3, 5); reconverting into water and electrical energy hydrogen and oxygen, through an electrochemical reaction of the latter in a fuel cell (9) fed from the tanks (3, 5), distinguishes itself by the fact that in the electrolyzer (1) and in the fuel cell (9) a same liquid phase is used and by the fact that the water produced in the fuel cell (9) by the hydrogen and oxygen reconversion step, is collected in the respective liquid phase and transferred together with the liquid phase to the electrolyzer (1) in order to undergo electrolysis.