6 volt agm battery has more life cycles. I assume they are deep cycle batteries and not car starter batteries.
How To Convert To 6 Volt Batteries For Dry Camping Deep
2 6 volt batteries to 12 volt. Amp hours are a unit of measurement commonly used to tell you how much storage your rv battery is capable of. 12 volt batteries are more affordable than 6 volt ones and its super easy to connect two of them together to double your amp hours. Below is a collection of quick reference diagrams on hooking up multiple 6 volt and 12 volt batteries to create 6v 12v 24v 48v etc as required for energy storage systems commonly found in residential and off grid solar hydro and wind systems. Discharging down do 80 depth of discharge 600 700 on average. It would appear that there is no significant difference in capacity and voltage between these two examples. Tap off of the series jumper for the 6 volts of one of the batteries.
Many experienced rv owners would often upgrade their batteries to 2 x 6v batteries that are connected in series. To produce a 12 volt output two 6 volt deep cycle batteries must be wired in series positive to negative. For two 6v batteries you can connect the positive output wire in red of the charger that is 12 or more volts to the positive terminal of the first battery. This is called a series parallel configuration. Yes series the two batteries to produce 12 volts. The 6 volt option must be used in groups of two.
Having two 12 volt batteries in parallel will give you twice as many amp hours capacity as two 6 volt batteries wired in series. Then connect the negative end of the first battery to the positive end of the second one and connect the negative end of the second battery to the negative output wire in black of the charger. You can then connect each 6 volt pair in parallel with another pair to create a larger 12 24 or 48 volt battery bank. Each 6 volt battery pair operates as a single 12 volt battery. Two 6 volt batteries in series vs one 12 volt life cycles. A 12v agm battery on average has only 150.
This configuration will still provide you with 12v of voltage which is the requirement for running appliances in an rv. Tap off of the two end terminals for the 12 volts. 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. Most regular rvmarine deep cycle batteries will have around 70 amp hours in them but you can buy deep cycle rv batteries with much less or much more.