In my experience the effect of charging in colder weather, at least at 6kW (30 amp and ~200V), on battery warming is limited. When temperatures are at or below 32F(0C), after charging for 90 minutes+ , my 2020 LRMY will initiate ~15 minutes of battery warming while preconditioning after the charging session. I would have to conduct several tests; charging for shorter periods at these temperatures and observe if the battery warming cycle is appreciably longer than ~15 minutes. I'm not referring to battery warming via stator heating that will take place in lower temperatures prior to charging, only the effect of charging on the temperature of the battery pack.