NOVELTY - The fuel battery installation has a container (31) containing parallelly connected flat electrolytic single cells (39) in its lower part and serially connected flat single electricity generation cells (41) in its upper part. Electrolysis of water using solar energy occurs in electrolytic cells and the generated hydrogen and oxygen gases are used as fuel in electricity generation cells. DETAILED DESCRIPTION - The fuel battery installation has a container (31) containing parallel connected flat electrolytic single cells (39) in its lower part and serially connected flat electricity generation cells (41) in its upper part. Electrolysis of water occurs in electrolytic cells and the generated hydrogen and oxygen gases are used as fuel in electricity generation cells. A partition (36) runs through the container separately. The space in the oxygen side space (S') having anodes (A) of the single cells and hydrogen side space (S'') having cathode (C) of the single cells. The co ntainer is connected to hydrogen storage container (34) and oxygen storage container (33) through water vapor condenser (42,43) and catalytic reaction devices (44,45). The condenser condenses water vapor in the gases and the catalytic device returns oxygen mixed with hydrogen and hydrogen mixed with oxygen to the container.    USE -   For electricity generation using hydrogen and oxygen fuels generated during electrolysis of water by solar energy. pump and other associated components is eliminated, thus reducing the size of the installation and increasing its reliability. The installation is completely autonomous and light weight. Apparatus requiring electric power are eliminated thus reducing the demand on electricity generated by solar battery. The pressure of a partition in the container prevents intermingling of hydrogen and oxygen. Since the cells used for electrolysis and electricity generation are flat, their volume occupancy is reduced. Since the single electrolytic cells are connected in parallel, the cells can obtain higher electric power, thus performing complete electrolysis. Since the single electricity generation cells are serially connected, each cell can give higher electrical power output. Since the condenser and catalytic reaction device removes residual water and residue of hydrogen in oxygen and oxygen in hydrogen, hydrogen and oxygen of high purity can be obtained. DESCRIPTION OF DRAWING(S) - The figure shows the block diagram of a regeneration type fuel battery installation. (31) Container; ; (33) Oxygen storage container; ; (34) Hydrogen storage container; ; (36) Partition; ; (39) Electrolytic single cell; ; (41) Electricity generation cell; ; (42,43) Water vapor condenser; ; (44,45) Catalytic reaction device; ; (A) Anode; ; (C) Cathode; ; (S') Oxygen side space; ; (S'') Hydrogen side space.    ADVANTAGE -   The need for water