Firn, this has been discussed in a number of threads. Unless something changed in a recent update, the Lightning does not precondition the HV battery. Only the MachE has this feature.
OK, that makes sense, thank you!I have monitored my battery a few times while using Google Maps for nav to a DCFC and CarScanner for the data.
HVB temp has only risen to 59.8 deg F from a starting point that was 48 deg F.
The AC compressor (heat pump) and coolant heater (resistance heat) both are active and using power during this time.