How To Connect Multiple Batteries For Charging. Two or more similar batteries are used to connect solar panels and batteries in parallel. The battery charger should always be connected to the same battery terminals the load wires are connected to.

And the batteries MUST be of the same capacity amper hours CCA etc. The identical positive poles must be linked to each other with positive to connect the batteries in parallel. Both if they are not too low.
This makes the connection method and interconnection between batteries a critical factor to ensure batteries receive equal charge and are discharged at the same.
A solar charge controller is also used to link the negative terminal to the negative terminal. When you connect multiple batteries in series connect the of the first battery to the of the second one. The battery charger should always be connected to the same battery terminals the load wires are connected to. The stranded design offers flexibility thus they are suitable for applications where wires need to be bent or twisted.
