Solar combiner box
Anyone made there own combiner box if so how and what did you use. Am solar has one for $80 but I am sure it can be built for a lot less.
Forum Discussion
Colo Native wrote:
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I was thinking if necessary I would run 6 or 8 but 10 is rated for 30 amps and my 2 panels are 18.5 amps
Total Imp on mine are about the same amps, and am running 44 ft (round trip) of #10. Charts I've seen say you can run #10 upto 50' at 20 amps without Ampacity (or overheating) issues. But you will incur significant voltage drop and losses at 20A. I calculate a Max 2.3% V drop for my system at peak current.
One of these days, I may replace the ~24' of #10 running inside the trailer (no UV) with something thicker and drop those losses. But since we rarely (if ever?) see peak current, I'm in no hurry. I put all those panels on the roof not for the bright summer sunny days, but for the grey wet days in Fall, Winter, Spring when there's no chance of peak output.
