bd7349
Member
I've been wondering about this. The extra heat to warm the battery will come from energy stored in the battery. If the driver has SoC to waste then fine, but I at least visit a Supercharger when my SoC is low. I'm imagining that in most of my use cases the option will refuse to operate.
Perhaps it makes more sense to spend the first couple of minutes at the Supercharger heating up the battery.
Elon explained this in a few tweets. See here: Elon Musk on Twitter and here: Elon Musk on Twitter
Basically, since the Model 3 heats the battery via heat from the motors instead of a dedicated battery heater, it'll be able to heat the battery quickly while driving by routing the heated coolant from the motors to the battery. So energy use will be low, but it should be able to heat the pack pretty quickly via motor heat (at least that's what I'm assuming based off his tweets).