It is an invention of the structure and manufacturing process of a kind of solar panel, which particularly is for a kind of solar shingle. Junction box is designed at the central area of the solar panel. The bus-bars connecting the electrodes of the solar cell array and the junction box are laid to go over the backside of solar cell array. In order to avoid shorting the circuitry by bus-bars located between solar cells and to prevent delaminating of the layers of the solar cells around the area covered by the bus-bars, an isolating component is in interposed contact between the bus-bar and the solar cells.