Connecting a second lithium battery

[bigtwin]

He states that the black wire to the busbar needs to be the same length as the red; that isn't the case and neither do the black battery wires to the busbar need to be the same lengths as the red battery wires.
It’s just a circuit, it doesn't matter if, for example, the positive and negative are both 0.5 m or if the positive is 0.9 m and the negative is 0.1m. In both cases the circuit carries 1m of cable resistance.

It does matter that all battery positives (to the busbar) are equal and all negatives (to the busbar) are equal (to ensure an equal charge/discharge distribution between batteries). The length of charge/discharge wires on the feed to the busbar are immaterial (notwithstanding the normal good practice requirements).

Ian

I’m curious about your emoji reaction LithiumConvert to the above post? It’s almost as though you thought that there was something controversial in it?

Ian