Advantages of solar panel quality control: 1) 100% full inspection of battery cells, and there will be four EL full inspection processes from cell sorting to finished product production. The power error of each solar panel is within 5W. 2) Color difference problem The same board is of the same color. If there are obviously different colors, it will be assigned to B-class downgraded components. 3) Strong light detection Our customized quality control standards, strong light on the back, check whether there are any problems such as fragments and corners from the front. 4) The junction box is full of glue, aged for 4 hours, and after the glue is air-dried, the cleaning, data detection, sorting and packaging processes are carried out. 5) The four corners are punched to protect the construction workers from injury. 6) The flame retardant backing material is safe from fire.