We're North America's #1 dealer in Electric thermal storage, or ETS units. ETS is an electric home heating device that can help lower your heating costs by storing heat when electricity costs less, and then releasing the heat during the day.  Nova Scotia Power's time-of-day (TOD) rates are what makes an ETS cost-efficient. During off-peak times—overnight, on weekends, and holidays—the demand for power is lower, resulting in a lower billable rate.