NOVELTY - Plant comprises several regenerative fuel cells (2), which operate based on hydrogen/oxygen, a cooling system, compressors (3) for compressing gases generated by the regenerative fuel cell, and several gas tanks for storing the gases. The regenerative fuel cells are combined to form at least one module (1), and the module comprises at least ten fuel cells. The compressors are in the form of hydraulic presses and the gas to be compressed is spatially separated by a hydraulic fluid from oil-lubricated components of the compressors.    USE - The plant is useful for storing electrical energy (claimed).    ADVANTAGE - The plant: ensures efficient intermediate storage of electrical energy, exhibiting a high energy density in the storage and a high holding capacity in the delivery of the stored current; has a compact design and small dimensions, such that it can be accommodated in a conventional cellar of a dwelling unit; is cost-effective both in the acquisition and in the maintenance and can be expanded in the storage capacity at any time without technical complexity; and is flexible to use, can be integrated easily in power generation installations of a most different type of construction or can be retrofitted in existing systems.    DETAILED DESCRIPTION - Plant comprises several regenerative fuel cells (2), which operate based on hydrogen/oxygen, a cooling system, compressors (3) for compressing gases generated by the regenerative fuel cell, and several gas tanks for storing the gases. The regenerative fuel cells are combined to form at least one module (1), and the module comprises at least ten fuel cells. The compressors are in the form of hydraulic presses and the gas to be compressed is spatially separated by a hydraulic fluid from oil-lubricated components of the compressors. The gas tanks are filled for the hydrogen in the interior of a highly porous hollow structure.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of a front view of the plant.    Module (1)    Fuel cell (2)    Compressor (3)    Controller (4)    Gas bottle (5)