Voltcraft 300w power inverter msw 300 xx uk usb voltcraft msw 300 24 uk the voltcraft msw 300 24 uk usb is a power inverter that changes direct current ac to alternating current dc in the form of a modified sine wave msw this inverter enables the powering of 240v devices in your car campervan mobile home on your boat or at a holiday home the high wattage a steady voltage output and high energy conversion efficiency makes this voltcraft inverter the perfect choice for a wide ran