2 AWG from combiner box?

I've encountered a logistical issue with my build and I'm hoping for some help. I'm choosing to run 6x100 watt panels in parallel on my camper (12v system). Yes, I know it's less efficient, but it's what I'm going with for shading reasons. Here's my problem: the math tells me I should be going with 2 AWG from my combiner box into my charge controller (MPPT). Each panel's ISC is 6.24A, which will yield a combined 37.4A. Taking irradiance and continuous use into account (x1.25 for each per NEC guidelines), we now have 58.4A. Next is temperature correction. I figure the hottest ambient temp I'll encounter is 115-120F. When adding another 40F due to roof proximity (per NEC), we're left needing a wire gauge that can handle 100.7A (58.4/.58). But wait, there's more! With 6 conductors in the circuit (after branch-connecting two sets of three panels), NEC tells us to divide by an additional 0.8, which puts us at 125.8A. Using 90C copper wire, this means according to the NEC I'll need 2 AWG running out of my combiner box. Now, this is what the code says, but do I really need to do it this way? The run from my combiner box to my charge controller is under 10 feet, so it's doable, but then I'm left with another problem: the largest gauge the charge controller accepts is AWG 6. Can't I just throw a 50A breaker on 6 AWG and call it good? Or does worst-case temperature scenario mean the wire could really melt, independent of my amperage?
Bonus question: Is it okay to use the branch connectors to parallel three panels with 10 AWG (heaviest gauge that fits the Renogy branch connectors)? The math says I'd need AWG 8 to correct for up to 50A, but Renogy says "IP 65 Protection" rates their wire up to 185F, so I think I'm probably fine.
Thanks for any help you guys can provide. I'm new to this, and am probably being too cautious. I've searched for hours online, but haven't found similar examples.
Bonus question: Is it okay to use the branch connectors to parallel three panels with 10 AWG (heaviest gauge that fits the Renogy branch connectors)? The math says I'd need AWG 8 to correct for up to 50A, but Renogy says "IP 65 Protection" rates their wire up to 185F, so I think I'm probably fine.
Thanks for any help you guys can provide. I'm new to this, and am probably being too cautious. I've searched for hours online, but haven't found similar examples.
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Comments
Your panels are going to produce less than rated - not more. Real world.
Tony
Being you will be using an MPPT controller, with the 100W panels it would be better to series wire at least two so as to have the voltage high enough for the MPPT to actually work, otherwise it will act much like a PWM controller. As voltage is inversely proportional to current the current will be reduced meaning smaller conductors could be utilized. Understandably shading issues may prevent this.
Use NEC rules as a guide, code rules are subject to many clauses, exceptions and not withstanding clauses, leading to confusion. They are also intended for building applications not vehicular, as such trying to follow them to the letter often seems impossible. Just my opinion.
Second system 1890W 3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.
5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
I have so many projects going on that I missed that your panels will likely be flat. They almost have to be on a mobile camper.