I wish they’d include some specs. I love this idea- I’ve also always wondered about the possibility of doing the reverse- storing cold. For instance, in places with demand based power pricing, could you store cold from your AC into something at night, and draw from it during the day when it’s hot? I don’t know enough about the physics, maybe the temperature differentials play a big part in efficiency that doesn’t work well with low temps vs very high, but I have no idea.