was thinking more power use averaged over time

So much less than you'd think. My GIGANTIC unit (literally a full sized fridge model but on it's side as a chest freezer) costs something like $25 to run all year. These things are stupidly good at their job because cold air is dense and sinks, unlike a stand-up model that dumps the cold air out every time you open it.

My mini fridge for my soda and bongs costs more to run each year and is literally 1/in the volume