Not sure about yours,but my 31W class C doesn't maintain the chassis battery while plugged into shore power. Confirmed by Thor it's by design. So I plug a small battery maintainer into the AC oulet under the dinette and use a 12V plug into the cigarette lighter socket on the dash.
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Pete and Carolynn Foss from Oxford, MI
2018 Four Winds 31W
1999 Aero Cub F-21 trailer
1977 Tioga 24 foot RV
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