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My thought the Royale House batteries are only charged by the 12v DN50, From DN50 there is a 4/0 cable from rear to DN50 to 2nd compartment back on passenger side where the four LifePo4 batteries are and one 12v gell battery for gen, It’s only way to charge is when it’s running and a small 120v trickle charger when parked, It does have a momentary boost button, The 4/0 cable from DN50 goes to battery compartment and then tied to Li batteries, Why can’t I rewire 4/0 cable to gen battery (Optima) DN50 likes Optima them from Gen to input side of 60 amp DC to DC charger them output side of charger to LifePO4 batteries,So driving down the road the gen battery is charging and LifePO4 batteries are charging,That should work??? If I sacrifice one of the LifePO4 batteries the DN50 won’t like that either, them it is no different then I have now but less one 280 amp hour batteries. If I use the gen battery for the DC to DC charger the DN50 won’t be a problem.??