Freezer prep for power outages

[helomech]

I plan on getting solar for my freezers as soon as possible, but for now we run the generator.

[FL-Jeeper]

Another use for your idea is to use it notify you if things inside thawed out (either due to absence or simple inattention). Fill a bottle halfway and freeze it on its side then roll it 180 so the ice is on top. You could go a step further and mark the bottle to minimize possibility of error. Next time you get into the freezer check the bottle and make sure the ice is still on top. If it isn't, you had a thaw.

[helomech]

Or a ice cube in a bowl, or on a plate does the same thing.