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Installing 2xsmartsolar 250/70 mc4
Can someone tell me what is the max cable size the MC4 can support ? Can I crimp larger than awg10 in the mc4 ?
I have 100 feet from the combiner box to each 250/70 . Total of 24 x 320 w panels in 4 series of 6 split in 2 , so 12 panels per charge controler.
Each final line between combiner to cc will have 240v/18a roughly so I wanted to use larger cable than awg10.
Thanks
It is possible to get MC4 connectors capable of crimping onto 10mm² (AWG 8) cable.
Your installer / dealer should be able to sort you out, otherwise have Google search for a supplier in your local area.
Thanks. We are the installer-dealer ! My concern is related to the specific MC4 terminals of the 250/70 .
@Herve RV Nizard I am not exactly sure what your concern is. A standard quality MC4 connector can handle 600V/30A on 6mm2 and the MC4 connectors on the Victron products would be no different, if not better. Your concern maybe should rather be fitting lesser quality connectors on the strings and then overcompensating with e.g. 10mm2 cable.
Thanks. I should have precised that my concern was related to the distance between the combiner box and the mppt : 35 meters. I was initially worried that the usual awg10 solar cable would be too small for this amperage/distance hence I wanted to see if i could use/crimp a larger cable to the controler's mc4. But because of the voltage I think the usual awg10 will be ok. Thanks for the assistance.
