Electric Thermal Storage

Electric Thermal Storage (ETS)

What’s Electric Thermal Storage?

Electric thermal storage, or 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 throughout the day.

Our time-of-day (TOD) rates are what makes an ETS cost-efficient. TOD rates change depending on the overall power demand. During off-peak times—overnight, on weekends, and holidays—the demand for power is lower, resulting in a lower billable rate. 

An ETS is a rechargeable smart heater that contains ceramic bricks with an electric heating element running between them. During off-peak times, when power costs less, it heats up the ceramic bricks. Then, during the day, the heat is released, keeping your home cozy and comfortable around the clock.



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