Many large industrial sites will cut deals with power companies for very cheap rates in exchange for not running during peak hours. Classic example is aluminum

Many large industrial sites will cut deals with power companies for very cheap rates in exchange for not running during peak hours. Classic example is aluminum refining, and, depending on process, steel refining. If you can do demand based pricing, you could even end up with new time arbitrage business models. A battery farm or hydro facility stores energy when rates are cheap and discharges when rates go up.