As an energy saving "feature", my freezer turns itself off when the ambient temperature gets below 5 degrees...

How is that not the stupidest design feature to have in a freezer, the sole purpose of which is to stay at least below 0 degrees? Surely, when the ambient temperature is below 5, it's going to be using a relatively small amount of energy anyway? Where I live, the mean temperature, for about 4 months of the year, is generally between 0 and 5 degrees so our freezer is essentially useless from now until some time in March...