If you name is what you have for a MH I doubt you have an inverter. A converter will provide 12V for lights & acc, and charge your 12V battery for the coach. An Inverter will convert the 12V to 120V for use of the normal appliances on the 110 outlets. If you want an inverter you will need more than 1 or 2 batteries for the supply and some rewiring of the coach.