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.
Charging 12v Batteries With A Generator My Generator
Two 12 volt batteries vs two 6 volt batteries. Id recommend two 12 volt batteries wired up in parallel for the following reasons. 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. Two 6v batteries in series the amp hours stay the same do not double. But this really is not the case. Two 6v 130ah in series have 130ah total.
In other word two 12v 130ah batteries in parallel have 260ah total. 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. Three cells in the 6 volt battery and six cells in the 12 volt battery. Some say two 6 volt batteries are better than two 12 volt batteries. Ps two 12 volt batteries in parallel the amphour capacity is additive.
First lets look at the make up of each type of battery.
Gallery of Two 12 Volt Batteries Vs Two 6 Volt Batteries
