[ChevyRules]

Originally Posted by FRANK121

All those quiet EV'z sitting in traffic trying to keep their passengers warm in the sub zero temps

What does this flashing light mean? Re-Charge soon

Here is a person that camped in their Tesla in -20 C ( -4 F). He found the Model 3( at the time of the video, the Model 3 used PTC heater) consumed ~2.5 kw per hour.

Assuming full charge at 78 kwh available, that is 31 hours worth of power being stranded keeping the car warm.

Again note that is with a PTC heating system. Newer Tesla's use heat pump's which consume less power so that 31 hours will be higher.

He did another test at -8 C with a newer Model 3 with the heat pump and found it consumed 1.3 kw per hour. Using that example above, that is now 60 hours worth of power sitting stranded with a full battery.

Now lets take an idling engine. Now like heat pump vs PTC, it all depends on size of the engine. But lets assume it's around 2.0 liters and a consumption of .33 gallons per hour idling. A car of the Tesla Model 3's size typically has a 12 gallon tank. That is 36 hours worth of idling with a full tank. 5 more hours than the EV with a PTC. Significantly less than an EV with a heat pump.