[xcntrk]

There is lots of advantage for lithium over more conventional RV deep-cycle batteries. More power storage (AH) in a smaller footprint with less weight. Take group 24 battery size for example, you can get roughly 50% more power storage (AH) with 50% less weight using a lithium battery over conventional lead-acid in the exact same footprint. Of course the downside is that the lithium is 4~5 times more expensive than a quality deep cycle battery. So you're paying 4-5 times more money for only half better performance. Does not compute...