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My RV has two (2) 200W panels on the roof connected to a Victron 100/30 MPPT controller (factory installed). It also has a factory installed Zamp port. I am building a suitcase kit for when parked under obstructions (trees). Panels: two (2) Newpowa 75W panels connected in series (already...

Thanks for the response. According to this calculator ( https://unboundsolar.com/solar-information/voltage-drop ) a 30 run of 16awg wire would give me a 3.9% voltage drop and a 40 foot run would result in over 5% drop. Both too much, IMO. A 12awg wire would be acceptable (both right at or...