Educate me on 12 volt batteries

parcany wrote:
Maybe I am wrong but I agree 2- 6 volt have more amp hours but if one of the 6 volt batterys go bad than you only have 6 volts and nothing in the trailer will work. Yes if your one 12 volt battery goes bad nothing will work anyway.

Yes however a shorted cell in a GC2 seems to be far more rare than a 12v marine battery.
4x GC2 also reduces to possibility of being stranded.