Both are lead acid batteries both contain 21 volt cells. A if you use two 6 volt batteries and one goes weak on you then youll be bellow 12 volts b conversely with two 12 volt batteries if one goes weak you still have a 12 volt back up.
How To Connect Two Batteries In Parallel Caravan Chronicles
Two 12 volt batteries vs two 6 volt batteries. It would appear that there is no significant difference in capacity and voltage between these two examples. Because it is important to shave weight wherever possible so you can improve the fuel efficiency of your rv having lighter batteries is always a good idea. Ps two 12 volt batteries in parallel the amphour capacity is additive. Two 6v batteries in series the amp hours stay the same do not double. In other word two 12v 130ah batteries in parallel have 260ah total. A 6 volt battery weighs significantly less than 12 volt batteries so much so that a single person will have no problem handling it.
Preparing your batteries for winter advantages and disadvantages of using two 12 volt batteries connected in parallel or two 6 volt batteries connected in series. Some say two 6 volt batteries are better than two 12 volt batteries. Three cells in the 6 volt battery and six cells in the 12 volt battery. But this really is not the case. Two 6v 130ah in series have 130ah total. First lets look at the make up of each type of battery.
Id recommend two 12 volt batteries wired up in parallel for the following reasons.
Gallery of Two 12 Volt Batteries Vs Two 6 Volt Batteries
