NOVELTY - Arrangement for supplying energy to the buildings, preferably to the stand alone buildings, comprises: e.g. at least one power generating plant (1), preferably a photovoltaic plant to provide an electric current; at least one electrolyzer (2) for producing hydrogen from water using the electric current from the power generating plant; at least one first chemical reactor (3) for at least partial hydrogenation of at least one substrate with an extensive pi -conjugated system using hydrogen, which is formed in the electrolyzer; and at least one storage tank (4).    USE - The arrangement is useful for supplying energy to the buildings, preferably to the stand alone buildings.    ADVANTAGE - The arrangement utilizes renewable energy, energy efficient, and allows the intermediate storage of hydrogen.    DETAILED DESCRIPTION - Arrangement for energy supply of buildings, preferably the stand alone buildings, comprises: at least one power generating plant (1), preferably a photovoltaic plant to provide an electric current; at least one electrolyzer (2) for producing hydrogen from water using the electric current from the power generating plant; at least one first chemical reactor (3) for at least partial hydrogenation of at least one substrate with an extensive pi -conjugated system using hydrogen, which is formed in the electrolyzer; at least one storage tank (4) for storing at least partially hydrogenated substrate in the first chemical reactor; at least one second chemical reactor (5) for at least partial dehydrogenation of at least partially hydrogenated substrate with the release of hydrogen produced in the first chemical reactor and stored in the storage tank; and at least one fuel cell (6) for the oxidation of the liberated hydrogen with the release of energy in the second chemical reactor. An INDEPENDENT CLAIM is also included for supplying power to the stand alone buildings using the arrangement, comprising (a) providing the electrical current, preferably a direct current from at least one renewable energy source, preferably the photovoltaic plant, (b) producing hydrogen from water in at least one electrolyzer by using the electric current from at least one renewable energy source, (c) transferring the hydrogen formed from the at least one electrolyzer in to the first chemical reactor containing at least one substrate with an extended pi -conjugated system, and at least partial hydrogenation of the substrate, (d) transferring at least partially hydrogenated substrate from the first chemical reactor into at least one storage tank, and optionally storing at least partially hydrogenated substrate in the storage tank, (e) transferring the at least partially hydrogenated substrate from the storage tank into the second chemical reactor, and dehydrogenation of at least partially hydrogenated substrate in the second chemical reactor with the release of hydrogen, and (f) transferring the hydrogen from the second chemical reactor into at least one fuel cell and oxidizing the hydrogen and oxygen present in the fuel cell to form water at the same time the release of energy in the form of electric power and heat.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of an arrangement.    Power generating plant (1)    Electrolyzer (2)    First chemical reactor (3)    Storage tank (4)    Second chemical reactor (5)