... grade instability of irradiance; Flash pulse 10~100ms, continuous adjustable;Four-line survey; 10 parameters display; 8,000 data collecting dots; ... ~300WMeasuring votage0~100V(resolution 1mV)Measuring current0~20A(resolution 1mA)Test Parameters1sc, Voc, Pmax, Vm, Im, FF, EFF, Temp, ... sliding tracks match the production line; special requests for customization and survey on various solar cells.