What we did to help balance out having a good time camping not worrying about would we have enough power to run the lights or frig the next day or bring the slides in was..I installed 2-6v costco batteries as our primary batteries and kept the 12v that came with our camper as a back up battery..so in our battery compartment I use a battery selector switch so I can choose which battery bank to use 1 (6v-2)- 2 (12v-1) ...works great plus added a solar panel on the roof to keep my batteries always charged and ready for our trips....enjoy