I searched for this info and found some scattered posts about this but not one topic with all the info so I wanted to start one.
I'd like to address two questions in this:
- Under what circumstances will the ICE come on during a remote start?
- Under what circumstances will the ICE come on when turning on the car with HVAC off and it set to EV Now?
- Under what circumstances will the ICE come on when turning on the car with HVAC off and it set to EV Auto?
I can add one data point to the remote start question. Last night I remote started the car from my phone. The outside temp was about 28F and the coolant temp was likely about the same. The remote start settings were set to Auto and HVAC was off when the car was turned off. When I got to the car I was surprised at how little battery had been used up, only about 0.7 kWh and I expected closer to 1.5. I then saw that the catalytic converter temp was up over 800 F which showed that the ICE had run. I don't want that to happen when remote starting, I'd rather the car just use up HVB power.