I have a 2001 Georgie Boy Landau. It does not have an inverter. It has one 12 volt house battery. I wanted to add an inverter just to power a 19 inch flat screen tv and a dvd player. What size inverter do I need and can I install it right up in the cabinet where the tv and dvd player are mounted. I see several smaller inverters on-line that look like they have 110 receptables on the end which I could plug the tv and dvd player into.