Deleted member 9909
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My car recommends that but only for rapid charging not necessarily for day to day driving. Mines is auto set for -5 on 10 off but can be adjusted to 5 on 10 off for DC rapid charging. As you can see it is temp dependent measured at the battery. More useful in Nordic countries but given what we are experiencingI was thinking about the advice Tesla gives in their manual about fast charging when the battery is cold: basically, don't do it! Here is what the manual says:
"You can minimize the amount of charge time by using Trip Planner (if available in your market region) to warm the Battery while driving to a Supercharger."
Which I interpret as meaning that driving the car warms up the battery. See also post by Ayoull above.
The normal driving efficiency is probably no battery heat effectiveness for short hops ( battery usage v benefit) but longer you may see more benefit imo by preheating
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