If you replace the wires going from the roof into the trailer then you might want to consider 10 or even 8 gauge. This will reduce voltage drop losses and allow you to add more panels later.
Hey PCMeC, When checking your controller for charging status, are you plugged into shore power and/or is the 7 pin connector from your TW plugged into your trailer? If so, those two situations will override the solar power charging.
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