Use these to connect your battery banks so that the load is spread better and your batteries will last longer.  You will need 2 per bank, 1 for Positive and 1 for Negative.  We have an example of how to wire these on our installation diagrams page

Solid copper bus bar.

9 ways

Manufactured from 25mm x 6mm high grade C101 solid copper bar

All connections are M8.

Total bar length 340mm.

Completed with quality GRP insulators.

Here is an example of wiring your batteries using the bus bar: