I'm brain fried.. mc4 connectors..8 gauge y branches?

[alvinecigs]

3 Poles.. Pole 2 is 75 ft from inverter.. pole 1 and 3 are 20ft from pole 2. There are 8 200w ecoworthy panels on the dual axis tracker poles.. I can't seem to figure out how to get them down to the right wire sizes while utilizing the combiner boxes and solar branches.. MC4 connectors that transition from 10g to 8g on outgoing side?

 

[sunshine_eggo]

I feel like more detail is needed.

What combiner boxes, and where are they?
How are the 8 panels per pole configured?
Panel Specs?
What wires are already run between poles/MPPT?

 

[Rednecktek]

The wires from the panels to the combiner box are small, usually around 14awg or so. You don't need the larger wire until the output of the combiner box which should be cable glands for thicker wire, not MC4.

What combiner bos are you using, how are your panels wired up, and what SCC do you have them all going to?

 

[alvinecigs]

Trying to stick with ecoworthy.. using their combiner boxes.. but they only offer 4 and 6 string.. just an odd number for what i'm trying to do.. but i suppose it would work if i only had 6 panels on each pole.. There is NO wiring right now.. just wires coming from panels.. I should be getting 6 of the ECO-WORTHY Solar Connectors Y Branch 1 to 4 Parallel PV Adapter Cable Wire Plug Tool Kit for Solar Panel(M/FFFF and F/MMMM) this after noon but i was going to send them back because I don't think they will work.. can't run the 4 panels in paralell with the 10 g wire for 25 feet.. but there seems no way around it.. argh..

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[Rednecktek]

What SCC are you using? You should be able to get 4 or 5 panels in series per combiner box input if you've got a proper MPPT controller. With 8 panels you should be able to do 4s2p and not need a combiner box at all, or 2s4p and bring each pair into a single input on the combiner. I have 2 of those same units.

Don't use the 4-way combiners, they're known to have issues and then you need an inline fuse for each of the panels which defeats the point of the combiner box.

I think you've got something in your string wiring that you're missing.

 

[alvinecigs]

I think I've figured it out. 4s2p to combiner box. 2 Y branches per "4s2p"s. should only need 6 string combiner box.