Calculate the right 4x4 dual battery setup with redarc s calculators that will help you work out the numbers your vehicle need.
What size cable to run for dual battery.
Below we reference the two things you must double check when sizing your battery cables.
For more detail though check with the national electrical code as well as your own zoning laws.
The century n70t deep cycle battery is rated at 100 amps.
The battery cable is among the most important cables in a battery management system.
It ensures you have power stay on task and avoid battery drain.
Regardless of the math we would never use 7 71mm battery cable in a dual battery system.
If in doubt always opt for the larger size cable.
I always suggest a minimum yes i did say a minimum of 6 b s 13 5mm cable for linking batteries larger is even better any further improvements to the charging time and system as a whole will be gained by increasing the size of this cable i know that the larger cable is not cheap but bigger is always best in the long run.
But to enable this you need to make sure the sizing is correct.
Copper conductor ampacity based on 75 c 167 f reference.
Use 13 5mm as an absolute minimum.
As far as i know these values are valid as of today.