AIMS Power 4000 Watt Pure Sine Low Frequency Inverter split phase with built-in battery charger and transfer switch. This inverter charger is perfect for medium-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 100/110/120/220/230/240 volts of alternating current. This product also has auto frequency detection that allows users to operate at either 50 or 60 hertz. This AIMS power inverter charger includes a powerful 55 amp charger and is capable of accepting any source of 240V AC power to charge batteries, including a gas or diesel generator or shore power.