If you own a large building or campus, you can get an ice maker to integrate into your HVAC system, and exploit electricity price dips. Thenwhen juice is pricy,

If you own a large building or campus, you can get an ice maker to integrate into your HVAC system, and exploit electricity price dips. Thenwhen juice is pricy, you're just running air past your stored ice instead of running the AC. The one catch is if you want this, you essentially have to let the utility control your system over TCP/IP