AIMS Power 6000 Watt Pure Sine Low Frequency Inverter, single phase with built-in battery charger and transfer switch. This inverter charger is perfect for large-sized industrial applications that depend upon power being available even under heavy load. This heavy-duty inverter charger is ready to go wherever you need it. Use this product for renewable solar, off-grid, business back up power, mobile and emergency backup power applications anywhere that uses 100/110/120 volts of alternating current. This product also has auto frequency detection that allows users to operate at either 50 or 60 hertz.