Quote:
Originally Posted by Farmer Folly
Bob, I guess the idea of the RV charging both batteries on house power has less to do with the Sprinter electronics than the coach electronics. Maybe I’m naive, but it seems reasonable to me that an RV should have the ability to co-charge both batteries while hooked up to house power, especially since chassis batteries are perhaps more likely to be discharged. Am I misguided?
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No, almost all class A motorhomes and a lot of class C motorhomes come wired that way from the factory. Mercedes does not allow the RV manufacturer to cross-connect the house and chassis battery systems.
What you want is something that will charge the chassis battery from the converter and maybe charge the house battery bank from the alternator but disconnect/separate the battery banks when no charging is going on. You may also want the ability to "jump" the chassis battery from the house batteries or vice versa (to start the generator).
Cavie gave you a link to the charging solution.
This may accomplish both:
https://www.amazon.com/gp/product/B000RZNP5K
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