Smart thermostats and water heaters can to that to some extent. Heat or cool the room a little more and run the water heater when electricity is cheap, so that

Smart thermostats and water heaters can to that to some extent. Heat or cool the room a little more and run the water heater when electricity is cheap, so that they don't have to run when it is expensive. Of course, electricity price matches supply and demand. Other options could be delayed start for large appliances like washing machines and charging electric vehicles. EVs have even been proposed as a distributed battery system to smooth out electricity use.