Wasn't there a concept floating around where we increase the tepurature of -40°C cooling rooms/freezer a few degrees for a few hours to flatten out power peaks or short comes?,(reply>), Yes, it's called demand management, big energy users are already be doing this.  For your example I imagine some of the large refrigeration rooms that supermarkets operate are already doing this.<br><br>A big step though is taking this technique to peoples kitchens.