I have a new 1500 watt power inverter it is a pure sine wave inverter. This is not a small plug in unit it is a wall mount unit with two outlets. It comes with 2-36" cables with lugs for attaching to you battery bank. The unit retails for over $500.00 and is fully automatic. First $350 takes it, if you have a computer onboard this is a great idea because it is a pure sine wave not modified like the toy inverters.