Modified sine wave inverter is a reliable, cost-effective choice for running typical resistive loads like lights and appliances, though modified sine wave inverters do not produce a perfect replica of AC pure sine wave power, they do provide an affordable option that for many mobile power applications, is perfectly adequate,Inverter with built-in charger and automatic transfer switch can offers a complete power conversion system—DC to AC, battery charging, and automatic transfer switch between battery and AC, it can be can be used for stand-alone or as a back-up power.