It has long been held by the tech-priests of the Adeptus Mechanicus, that at a certain point in a long-running appliances lifespan, it transcends it's earthly limits and gains the ability to tap into the limitless inter-stitial energy potential field that exists within the borders between the universes. They become as like unto a god, unconcerned by earthly matters like electricity. Deus In Machina.

Unlike Ork "col' boxez" that continue to work in spite of their crude construction simply because they believe that they will.

(or it could just be that they used really good design and insulation to minimize energy loss. It's really either or.)

Chest freezers with door on the top instead of the front are super efficient like that. Since cold air sinks and there are no door seals or 'weak points' for the cold to leak out near the bottom, the compressor rarely needs to come on even if you do open the top.

And fuck me if it doesn't power itself and keep food frozen even when the electricity goes down.

Do you call it Christine?