Not quite sure I understand your question.  It’s a residential fridge.  Either plug the coach into shore power, or fire up the generator, or turn on your inverter after you bring the house batteries to full charge.  Fridge will start getting cold, then load it up.

Ours has a fast cool cycle that can be used. It gets things cold in a hurry. We also keep ice packs in our home fridge that we add into the freezer to help as we load.