The RV is parked next to the house and is attended almost daily for maintenance and projects. Typically, I extend and retract the RV's steps - that are connected to the chassis 12 volt circuit - as needed to keep the steps clear of any additional vehicle movement in the driveway. So, if there isn't a trickle charger feeding the chassis battery when on shore power, it is probably me that is draining the battery.
During warm weather, we constantly run two to three fans using the coach 12 volt circuit. Never having an issue with the house batteries I ASSUMED there is a trickle charger for those batteries and further expected the same charger would be maintaining the chassis battery.
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