To switch from two 6 volt batteries to a single 12 volt you can simply connect all power to the positive terminal and the negative connects directly to the frame ground. It would appear that there is no significant difference in capacity and voltage between these two examples.
Lantern Battery Wikipedia
2 6 volt batteries in series vs 1 12 volt. However i could use 3 12 volt batteries in parallel. Fuses or circuit breakers for each battery should be used to prevent a good battery discharging high current into a failed battery with a shorted cell for example. The more batteries you add obviously the more current youll be able to store. My battery box has room for 3 batteries. The 6 volt batteries you currently have is set up in series. Charging batteries again can save you time and energy instead of buying new batteries.
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. Obviously i cant use 3 6 volt batteries in series. Four 6 volt batteries wired into a series parallel configuration as another example will provide about 450 amp hours of use. Learn about charging 6 volt batteries in series with 12 volt charger by following these steps. Two trojan 6 volt batteries wired in series yields about 225 amps at 12 volts. A 6 volt battery weighs significantly less than 12 volt batteries so much so that a single person will have no problem handling it.
Two 12 volt batteries in parallel have twice the capacity of the six volt series but the 12 volt parallel connection is a dangerous fire and explosion hazard. I have 2 6 volt batteries now and they are more than 5 years old. Two 100 amp hour 6 v batteries in series have the sam capacity as one 100 ah 12 volt battery. Jump start procedures 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. Charging two 6v batteries in series helps you understand what happens on a physical level when charging batteries. It seems they dont last as long as they used to.
So i will change them soon. So my choices are 2 6 volt or 3 12 volt batteries.