Hej. Thanks a lot for the information on the solar panel.
There are stuff I do not get: if the panels are wired in parallel, the tension at the controller is the same but we have more power leading to more electric intensity on the wire going from the controller to the panels. That increase in intensity would require thicker cable to account for increased current (according to joule).
I might have misunderstood something in your text.
@doublemetres My understanding was that wire could be thinner between the panels and branch connector(or combiner box), then would thicken from the connector to the controller as amps are added up. Like in this chart:
I may have worded things badly in my text. First draft ;).
Thanks a lot. Everything Makes sense now. I think I got confused by the fact that awg6 is thicker than awg10. I am used to mm squared (living in Sweden).
@rek Referencing that AWG wire size chart is potentially quite confusing as it only gives the diameters of the wires in mm, not the cross-sectional areas (CSA) in mm² which is what people usually use.
The unfortunate bit is that people also abbreviate mm² to mm and the numbers are sometimes similar (e.g 16 AWG is 1.291 mm diameter and 1.31 mm² CSA).
This table is more complicated but less of a trap for the unwary:
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