Oh, I did want to mention a couple things that, as the daughter of a stationery engineer, I was taught as a kid.

1. Do not open and close the refrigerator too much when the power goes out, as every time you do, you are letting room-temperature air in, and things will spoil/melt faster. Just open the freezer once to get the ice cream out and call it good!

2. If the power is out for a long enough time that you know everything in the fridge that is perishable has perished (depends on what time of year/ambient temp., etc.) but over 12 hours, you can unplug the refrigerator, and make sure as many things are turned off - light switches, etc., as possible, so there is not an overwhelming spike in demand when the power comes back on, and it will immediately have so much demand that it bumps back off.