stevenal wrote:
I have two 12 volt batteries so that if one fails I can disconnect it and still be operational. With 2 6s you're out of luck.
Yes but the advantage is minor IMHO. A short will likely wipe out both batteries. My batteries have always lost capacity which serves as a red flag for replacement.
Batteries are available everywhere in the US so I don't see a significant issue with a failing battery of whatever voltage. Inconvenient of course. Plus the advantages of deep cycle batteries for me far outweigh other types for the house battery.
Case in point: My son's 3 year old 6V GC battery have lost capacity due to lack of maintenance. We just installed additional solar and he's talking new Trojans and better maintenance next fall when he will again be dry camping. In the meantime they are adequate.
If upgrading from 12s to 6s be sure you have room including height. 6s are higher for a reason - There is more space under the plates allowing for more sloughed lead before reaching the plates resulting in longer life.
