Bill,
I installed a Xantrex product called the ECHO Charger on my coach. In short it spreads the charging between both battery banks... So if solar is charging my house batteries (factory installed on mine) then the chassis batts also get a share. Like wise if I'm plugged in, it charges both. IMHO it's the simplest (3 short wires) install and it's a solid state device that's fully circut protected. Look it up on Xantrex's website.- bought mine on amazon several years ago.
Hope it helps
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1998 Signature 42' M11 450hp - -pulling 25" enclosed trailer with SCU sandcar inside
Lovely Wife, 2 kids, 3 dogs, 2 cats
Diesel Mechanic to the stars
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