polycrystalline solar panel

portable 156*156 polycrystalline silicon solar panel Character ofpolycrystalline silicon solar panel 1.Dimension 156*156mm 2.Wafer thickness 200 3.Front(-):Two 2.0 wide busbars (silver)With Center distance 75mm. 4.Back(+):4.0mm wide silver soldering pads aluminum back surface field. 5.Silicon nitrate antireflection coating 6.Both front and back use silver contact,Back surface field is aluminum. 7.Strictly quality testing 8.Automatically testing and sorting in 24 separate bins base on iec060904 criterion 9.100% strictly final testing for reverse current,shunt and series resistance