These low power inverters for homes are principally meant to be used with small scale solar, wind or hydro power systems for a small sized home or business that needs an independent  power source. The small inverter can also be used for providing emergency backup power to homes that currently use the power from the utility grid. Low power or small Inverters in the range of 300VA - 1KVA sometimes come with built-in AC charger option that particularly well suited to charge you inverter batteries whenever there is power from the utility grid.