Two 6 volt vs two 12 volt run time
I was just informed that two 6 volt batteries would run the residential refrigerator many times longer than two 12 volt batteries. I wonder if this is just hype?
Forum Discussion
From a practical sense I think you were informed correctly if you look at life cycles per cost. I have not found a true deep cycle 12v battery that is close to the cost of a 6v GC battery. I paid $74 each for 2 Sam's Club 6V GC batteries 9 years ago which are still going strong and I dry camp 95% of the time. At the time 2 12 v deep cycle batteries were more than double that. As others have stated it is not a fair comparison to compare 2 12v starting or a 2 12v marine battery to 2 6v GC batteries for cycle life. So yes if I had to choose today to buy batteries I would choose 2 6v GC batteries over 2 12 v batteries unless someone on here can post a true 12v deep cycle battery with the same cost and cycle life of the 6's.
