The climate control in my (non-tesla fwiw) EV with a heat pump uses around 2kW when its going full-out. Anecdotally it also heats the cabin much faster than a s

The climate control in my (non-tesla fwiw) EV with a heat pump uses around 2kW when its going full-out. Anecdotally it also heats the cabin much faster than a space heater would. Usually it's only pulling that much juice for the beginning of a drive and after a few minutes it reduces when it finds a steady-state. 2kW is about the same amount of juice that the drivetrain pulls when driving 35mph, so it can make a pretty big difference in the efficiency of shorter drives. Sidenote: even though resistive heating is less efficient in heat per watt, using the heated seats is usually more efficient in terms of comfort per watt than heating the entire cabin