Time may vary. The first winter I had the car the app wasn't even released yet. Sometimes I'd run outside and crack a door slightly so the heater would start up. This wouldn't heat the pack but at least the cabin would warm up.
If you're preheating be sure to take advantage of any source of AC power available. Better to draw from the AC mains than your battery pack. My car takes 11 kW when preheating (pack heater and cabin heater are both about 6 kW).
If you're preheating be sure to take advantage of any source of AC power available. Better to draw from the AC mains than your battery pack. My car takes 11 kW when preheating (pack heater and cabin heater are both about 6 kW).