De-combiner box?

[Mhoward84]

I am helping a friend build a big off grid setup and will have 60 panels on a carport.

The 3x sol ark inputs require we do 6x strings of 5p2s.

Do I have to run all 6 wire pairs all the way to the inverter or can I combine them in a combiner box then send it all back with a heavier gauge cable then “de-combine” it with another fused combiner box in reverse?

I look at lots of solar installs in my neighborhood and it doesn’t look like the conduit is big enough for all 3 pairs of wires running to 3 mppt inverters and I’m wondering how it’s done. Thanks for any information in advance!

 

[timselectric]

Separate pairs of wires.
Do all of the neighbors have the exact same system?
Every system is different.

 

[Mhoward84]

Separate pairs of wires.
Do all of the neighbors have the exact same system?
Every system is different.

Thanks for the answer. I am also looking to do another solar install to a sunny boy 7.7 and it has 3 MPPT trackers and it sounds like I need to do a run to each one of them? So 3 pairs of wires down roof to the shutoff to the inverter?

 

[timselectric]

Thanks for the answer. I am also looking to do another solar install to a sunny boy 7.7 and it has 3 MPPT trackers and it sounds like I need to do a run to each one of them? So 3 pairs of wires down roof to the shutoff to the inverter?

Yes

 

[Mhoward84]

Yes

Thank you kindly!

 

[schmism]

most grid tie solar (neighborhood systems) are high voltage DC 400(ish) volts which means the wire can be small.

And as Tim said, yes 3 pairs (6 wires? or 6 pairs 12 wires?) all home run.

 

[PyroRider]

A 4mm2 wire has only 6mm in diameter, they dont require much space