This 5000 watt 12 volt DC to 220/230/240 volt AC (60 hz)  power inverter by AIMS Power converts DC (direct current) power stored by batteries into AC (alternating current) electricity that can be used to run practically any household appliances or tools. This inverter will NOT produce 120 volts. It is only for 240 volt AC applications. See PWRINV500012W for applications needing 120 volt AC. This unit produces a modified sine wave, which is capable of running most tools, pumps, motors and appliances that operate at 240 volts AC. Use this product for off-grid back-up power at home, cabin, boat, larger solar systems or anywhere that doesn't have city power. What really makes this 5000 watt AIMS Power inverter special is its capability to run off of most vehicles’ and/or RVs'/boats' standard power systems at 12 volts. That makes the inverter very attractive to mobile business owners since users don’t have to modify a vehicle’s standard power system in order to run the inverter off of a car or truck. This definitely saves some money if upgrading a fleet of vehicles with some aftermarket equipment that requires this much power.