I've checked mine out and the simplest answer would be: It depends on what you are comfortable with.
On our Sprinter, the inverter and shore power both feed into what would appear to be a "normal seeking" transfer unit. The "normal" on mine is shore power while the "alternate" is the battery powered inverter. Once shore power is applied to the transfer unit, it breaks the alternate feed and makes the normal feed. It does not turn the inverter off but the inverter is not powering anything either. If shore power is lost, the transfer unit supplies the refrigerator from the alternate source (inverter) until shore power is restored. IMHO, we will continue to leave the inverter turned on while onboard rather than risk losing the groceries while we are out on a day trip.
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Bill & Anne, Athena (cat), Jada (pup), and Cupcake (cat)
Retired Navy CPO, Vollie Firefighter and Industrial Maintenance Specialist
Wilson III: 2015 Ram Tradesman 2500 6.4l CC 4x4 SB
the gypsy, Belle III: 2018 Sprinter Limited 3531 FWDEN
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