Battery Banks (series, parallel, or series/parallel) should always be configured so that Load Distribution Cables
are connected to different batteries at opposite ends of the combined bank.
When connecting the batteries in parallel, the positive poles are connected to each other, as are the negative poles. The voltage does not change and the capacity (Ah) will be the sum of the connected batteries.
When connecting the batteries in series, the positive pole of one battery is connected to the negative pole of another battery. The voltage will be the sum of the connected batteries voltage and the capacity (Ah) will remain the same.
In the Parallel-Series connection, both types of connections are used. The parallel connection will raise the capacity (Ah) while the series connection will raise the voltage.