Sealey inverters 230v with accessory kit sealey mw180a a 180a 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 mw180a will produce up to 180amps at 40 duty cycle manufactured from pressed steel with a powder coated finish for extra corrosion resistance