Xantrex PROsine 1800 Inverter24V 1800 Watts GFCIModel: 806-18501000 and 1800 watt inverters (1500 and 2900 watt surge capability)True sine wave AC output (crystal controlled)Total Harmonic Distortion (THD) of 1% (typical), PROsine 1000 and 1800 inverters...