Tinning of copper busbars refers to the partial or whole tinning of copper busbars, which does not require heating or electroplating tanks. The process is simple and easy to operate. The positive and negative reversing switches are located on the front panel. By turning the switch up and down, the reversing can be realized quickly. The biggest advantages are power saving (90% efficiency), time saving (only two-thirds of the original rectifier time, or even shorter), material saving (raw materials can be saved by 30% at the same time), and high efficiency (each section can increase the output value by more than one-third).