Timers are a simple way to avoid peak usage periods. With the demand time-of-use rate, timers can work great to avoid defined peak periods.
The timer can be hooked up to a pump, heater or any significant electric load and can ensure it doesn't run during the defined window of time.
Smart timers are also available, providing the ability to control the device via smartphone, table or computer.
Additionally, most new appliances come with a scheduling function allowing the user to easily schedule cycles for non-peak times.