“the fridge itself becomes the battery -- a cold battery.” Wildly my first thought from from this is that you theoretically could use a peltier in reverse to g

“the fridge itself becomes the battery -- a cold battery.” Wildly my first thought from from this is that you theoretically could use a peltier in reverse to generate energy. It wouldn’t be efficient but possible. At a different level, you can also think about your interactions with the fridge. You could segment the fridge such that it had different insulated sections that you use.