Voltcraft 300w power inverter psw 300 xx uk voltcraft psw 300 12 uk the voltcraft psw 300 12 uk is a 300w inverter that can generate a pure sine wave ac output sine wave inverters are used to power devices sensitive to power fluctuations this psw inverter is reliable safe and efficient the electronics with a microcontroller continuously monitors the major parameters hence this unit is extremely reliable even under demanding conditions even overload or short circuits will not cause an