Now, those electrical engines, electrical though they may be, still don't have 100% efficiency. I don't know how many kW the Tesla engine is putting out, but ev

Now, those electrical engines, electrical though they may be, still don't have 100% efficiency. I don't know how many kW the Tesla engine is putting out, but even at 90% efficiency you still have 10% of all that power wasted as heat. That's a lot of heat. Maybe it could be used for heating?