Flexible solar cell: thickness less than 100μm, the curvature more than 0.3, the conversion efficiency more than 18.5%, and the surface density less than 250g/m2.  The weight density of solar panel is 550g/cm2, and its energy density more than 300w/kg, the curvature is greater than 0.2, the wind speed against 30m/s, the minimum working pressure is 5kpa, it can work stably at -55~75°C. The flexible silicon solar panel can be installed on various surfaces.