That can be true even if the batteries are the same size. The fact is you should always use the exact same batteries when putting them is series or parallel and there will always be a voltage drop between and batteries that are connected by wire.
Connecting Charge Controller To Batteries Question Victron
Connecting different batteries in parallel. Take another wire and connect the negative post of the first battery to the negative post of the second battery. Series connection increases battery voltageparellel connection increases battery capacity. This makes no sense why dont you just put the earth at battery b. The longer the run of wire the more resistance so the more of a voltage. When you connect two or more batteries that dont charge and discharge at the same rate one battery will probably end up overcharged andor one battery will end up undercharged. To connect batteries in parallel the positive terminals are connected together via a cable and the negative terminals are connected together with another cable until you reach your desired capacity.
All flooded lead acid or all agm. Connect the other end to the positive terminal of the second battery. How battery charging works with a parallel battery bank. I plan on adding more battery cells to this battery by connecting more in parallel but does amp hours or differences in discharge current matter between the batteries. Always use heavy duty wires when connecting batteries in parallel. They can have different capacities on account of size or age but the same chemistry eg.
These are some of the cheapest cells i could find and they output 20a continuous which is much higher than the other cells. Lets suppose you have 3 different 12v batteries wired in parallel to supply 12v power to your rv. How to connect lithium batteries in parallel and series. Connect your positive and negative wires to one battery and run your application. Different types of batteries flooded or agm also can have different chargedischarge characteristics. The fact is once they are in parallel it doesnt matter which way you connect the battery because there is no battery a and no battery b they become one battery.
The basic concept is that when connecting in parallel you add the amp hour ratings of the batteries together but the voltage remains the same. Two 6 volt 45 ah batteries wired in parallel are capable of providing 6 volt 9 amp hours 45 ah 45 ah. Connecting in parallel increases amp hour capacity only.
Gallery of Connecting Different Batteries In Parallel
