Yes, as others have said, your engine alternator will charge both battery banks. There is a delay from when you start your engine and when the solenoid kicks in and starts charging. There is also a solenoid that ties in the coach batteries. It is possible that if that solenoid switch fails, the coach batteries will not get charged.
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Bob & Joan Alexander, 2010 Tiffin Phaeton 36 QSH, 2013 Jeep Wrangler (toad)
Lobo & Juniper (woof, woof)
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