Sealey inverters 230v with accessory kit sealey mw160a a 160a inverter from sealey with accessory kit lightweight powerful and incredibly versatile this inverter offers many advantages over traditional transformer type welders inverters use state of the art electronic components to produce fully portable power sources for arc welding for example mw160a will produce up to 160amps at 40 duty cycle manufactured from pressed steel with a powder coated finish for extra corrosion resistance