The answer PD gives assumes that the converter will produce 45 amps to the batteries. But with two 6 volt batteries in series all the amps the converter might produce would go to both batteries; otoh if you have two 12 batteries in parallel the current would be about half to each.
You need to carefully study what the battery manufacturers requirements are for charging and then size your charger and wiring accordingly.
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2016 Axis 24.1 E-450 6 spd tranny
300 watts portable solar.
200 watts solar on the roof.
Wrangler JK dinghy
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