f-stop
Active Member
Can you do the same test one more time and see if the battery heater turns on without having a supercharger in the navigation. I believe the coolant heater will turn on if the battery is below 0 C one way or another.
so this morning, about -5C outside, my car parked in cold garage, no charge overnight, -2C on the dash, SOC ~65%, no destination set in nav, hvac turned off. Got in the car, pressed the brake with car left in P: a couple minutes later I see the battery heat icon turn on in the app.
so yes it seems you're right that below freezing the battery heater turns on regardless.
it's forecast to warm up above freezing again in a few days, so maybe I'll try again then to reconfirm my earlier observation that setting Nav to a nearby Supercharger while in Park also turns on battery heater at above 0C temps