https://www.sgbsolar.com/products About the production process of photovoltaic tiles. 1.Scribing 2.Feeding 3.Welding：Weld the interconnection strip to the main grid line on the front side of the battery (negative pole), and weld the front side of the battery cell and the back side electrodes of the surrounding cells in series with each other by means of the interconnection strip. 4.Laying and laminating: String welded battery strings are laminated together with glass and backsheet materials.