Wire gauge?

[John Frum]

Its also 90 volts for 3 panels in series.

GIGO
I am just not on top of this today.
4 awg is indicated 2x 8 awg would be ok.

 

[Forbisher]

GIGO
I am just not on top of this today.
4 awg is indicated 2x 8 awg would be ok.

Yeah thats what we already had. Lol
4 awg is 2% drop
The 2 calculators are fairly close and agree.
Note that the calculator that i prefer calulates double wire and aluminum wire or even silver and gold wire if you gotta have the best.

 

[paultn]

May be a stupid question. I know wire gauge is all about what amps is being drawn. But if i use a Post /Busbar as in diagram. Small 12v batteries all connect to the post with 12 guage. Ten thick gauge from the post to load.
My question is, from the post will the power be equally drawn from the batteries needing less gauge wire? Or am i totally wrong?