[mlarryeliz]

Troy, good question; I have a similar set-up and a similar question. The dealer told me that one battery would "likely" power the battery "around" 12 hrs. We all know that its performance is dependent on many variables. Our unit has two batteries but I do not expect to get double the useage of one battery and there are many current draws on our 12v electrical system. For now we work hard to get to shore power as quickly as possible.
Enjoy!