Is it possible as I have been told by RV dealer to replace my 4-6v house batteries with 2-12v batteries? he said if I didnt boondock for more than a week at a time the 12v batteries would do fine as we would be drawing the same amps as 4-6v? we dont boondock more than a week at a time anyway so its a way to go.we are fultimers and usually are in a park with full hookups.