NOVELTY - A component formed by processing melted aluminum type plated steel plate is bonded with component containing steel by supporting component. The obtained component is bonded with structure containing component. The steel substrate exposure portion is cut in end surface. Then, the aluminum alloy frame (11) is installed in solar power generation module (12) of building. The melted aluminum type plated steel plate contains steel and chromium. The aluminum type plating layer contains aluminum and silicon which is formed by adhesion.    USE - Installation of power generation module used in roof of building such as residence.    ADVANTAGE - The method is economical and efficiently installs the power generation module with excellent reliability, durability, and suppressed galvanic corrosion resistance.    DETAILED DESCRIPTION - A component formed by processing the melted aluminum type plated steel plate is bonded with component containing steel material by a supporting component. The obtained component is bonded with structure containing metal supporting component in which the frame is mounted. The steel substrate exposure portion is cut in the end surface and is attached to the frame which is mounted. Then, the aluminum alloy frame is installed in the solar power generation module of the building which forms electrical link between the supporting components. The melted aluminum type plated steel plate contains (in mass%) steel plate base material (7 or more) and chromium. The aluminum type plating layer contains aluminum (3-12) and silicon composition which is formed with adhesion amount of 20 g/m2 or more. The plated steel plate has difference of natural electrical potential on the surface of base material and natural electrical potential on the surface of aluminum-type plating layer is 300 mV or more in simulation rain water at 20 degrees C. The simulation rain water has sulfate ion concentration of 20 ppm, chloride ion concentration of 5 ppm, nitrate ion concentration of 10 ppm and pH of 6.    DESCRIPTION OF DRAWING(S) - The drawing shows the component structure of installing solar power generation module.    Roof surface (10)    Frame (11)    Solar power generation module (12)    Fastening metal fitting (31)    Cover between module (32)