... With little no-load loss, compared to traditional welder, it can save electricity about 50%.Inverter frequency ... reaches 20Khz, high dynamic response, easy to strike arc.Arc is stable with low noise, deep molten hole, ... high strength.Fine arc force adjustment, can prevent electrode sticking.Applicable for ... please feel free to contact us. ARC-250 (IGBT) Inverter DC Arc Welder