The Fusion Energi turns on the electric heating element when the AC is on (and the AC light is illuminated). The higher the temperature setting, the more likely the heater will be on.
If the temperature is set to LO, the heater does not come on. If you raise the AC temperature setting past a threshold that I have yet to determine, the heating element turns on. Then to turn it off again, you have to lower the AC temperature setting past a different threshold. This is very inefficient. You want to raise the temperature setting to reduce energy usage by the AC. But instead, the heater comes on and consumes even more energy than had you left the setting at a lower temperature. You need to monitor the energy usage of climate on the car's left display and choose a temperature setting that minimizes energy usage.
It was 80 F outside. The inside temperature was also 80 F. As I varied the temperature setting, the AC power ranged from 0.5 kW to 0.8 kW. The heating element power ranged from 0.0 to 1.2 kW. During the 6.5 minutes I observed the power usage of the AC and heater, the AC used 0.06 kWh of energy and the heater used 0.07 kWh of energy. The heater used more energy than the AC. Why is the car wasting energy running the heating element when its hot out?
Edited by larryh, 02 June 2014 - 06:19 PM.