Brief summary as to why two 6 volt batteries are better for dry camping than one or two 12 volt deep cycle batteries. The six volt battery has more life cycles (discharged to 80%) than the twelve volt and supply more power for more time. 6 volt batteries were designed for golf carts and are an excellent source for power to run loads inside an RV. Keep in mind, you will want to run a generator to handle loads like microwave, coffee makers, hair dryer, ie anything that requires high wattage.