Not to be condescending with this question, but . . . When you and your family go on vacation for a few weeks, do you unplug your home's refrigerator? There really is no difference, between a boat's reefer compressor and a home unit - but voltage and size.
They're designed for this, so keep it on 24/7. We do, and so do the many seasonal and liveaboard friends we have.
True Blue . . .
sold the Nauticat