[DODGERAM808]

i think your best bet would be to pick up either a yellow top optima or the bule top marine batteries. mount the battery anywhere you want. even in the cab if you have a spot. you can run the inverter off these batteries for hours on end. yellow and blue tops can be completely drained and always be able to take a charge again without ever wearing out. depending on how big of inverter you decide to go with you might have to upgrade to a HO alternator if you plan on running a lot of current. good luck