If you're just getting started with solar or need a reminder of how to connect your batteries to make a battery bank the video above and diagrams below should answer your questions.
Series allows you to connect batteries while increasing voltage and amperage stays the same.
Parallel allows you to connect batteries while maintaining voltage and increasing amperage.
Parallel/series allows you to build more than one appropriate size battery bank and then connect them together.
A bus bar will allow you to connect equal lengths of wire from negative and positive to draw electricity from your bank in the most balanced way possible.
