I believe that the vehicle keeps the battery above a certain temp ( ? 2C = 36F ? ) if not plugged in, but if plugged in it will warm the battery to a higher temp. But what I don't remember now is if the vehicle warms the battery *during* the charge, or only after a full charge is *finished*, or *all the time* while plugged in. Does anybody remember?jabe wrote: ↑Tue Nov 26, 2019 6:56 pmgoing to leave it plugged in and in the garage and set to charge at departure time. so battery is warm when i leave.. never charge my model 3 full so was going to set departure time an hour after i actually leave so battery is warm just not at 100% when i leave.. thoughts?
At any rate, I also have used the technique of "set departure time to later than the real departure time so that it isn't fully charged" - but I live in Calif and don't have to worry too much about the battery temp.
Another piece of useful info is to use the "remote start" feature, which will "warm" the car for up to 20 minutes (you can also do it a second time). It will pull the first 3.3 kW of energy from the wall if it is plugged in (level 2 charging). ( "remote start" is described in the manual, you can turn it on with the keyfob and with On*Star, remotely, if you have an On*Star subscription). So I also suggest that you "remote start" the car in the morning, which will turn on the climate controls (to whatever setting you had them at when you turned the car off) AND it will start warming the battery pack. If you just want to heat the battery, leave the car's interior heater turned off. If you'd like some heat in the car, set the heater to (say) 72 degrees, and medium fan speed before you turn the car off. Again, you can do this a second time remotely. (If you are only going to drive for 5 minutes and park it for 9 hours, it's sort of a waste. If you are going to drive 30 minutes, it is *wonderful* to start with a warm car and a warm battery, heated by your house current.)