[nascarnation]

They switched from resistance heat to a heat pump.
Anybody up north who has had a heat pump can testify how well they work as temps go frigid.

[TexasGator]

“They switched from resistance heat to a heat pump.
Anybody up north who has had a heat pump can testify how well they work as temps go frigid.”

Obviously you are not knowledgeable on the Tesla system.

[Tell It Right]

I wonder why Tesla doesn't use both resistance heat and heat pump. It doesn't have to be an exclusive "either this or that but not both" type decision.

In my home heating I have both (variable speed heat pump and variable speed air handler saves power bigly, but heat strips come on the few times it gets too cold even here in Alabama for the heat pump). The same with my hybrid water heater (heat pump built into the top to efficiently, but slowly, re-heat the water after a shower, but I can switch it to using electric elements like a normal electric water heater if I have company staying over and need to heat my water faster).