Our coach (mbe4000 w/ single alternator) charges the house batteries when the engine is running.
If yours doesn't I would be surprised.
Further the factory alternated is sufficient to keep up and charge our (3) house batteries.
Does your choach have an emergency gen start (battery combine) switch ? If so then your house and chassis / engine batteries are already wired together via an isolation relay.
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Don R.
'04 Haulmark (M42386) 42', 2 slide, 10kw - Pictures
'04 F350 CrewCab Longbed 4x4, 50g aux tank & gear vendors dbl over
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