I was thinking more power use averaged over time. But yeah there’s a lot of factors in calculating something like that.

I’m a freezer hoarder myself (mostly stuff I bought cheap, close to expiration) but I just have the bottom part of a typical European fridge (not double-wide) to use. Fills up pretty quickly but with the shape pizzas are, you can load up a shitload of those bad boys in an otherwise “full” fridge with some elbow grease.