Leave Model S plugged in when not in use. This uses the charging system, rather than the Battery itself, to keep the Battery warm (see High Voltage Battery Information).
Scheduled Departure
When parked, plug in Model S and use the Schedule settings, available on both the charging and climate control screens, to set a time when you want to precondition Model S (see Scheduled Charging and Scheduled Departure). Your vehicle determines the appropriate time to begin charging so it is complete during off -peak hours and the cabin and
Battery are warm by your set departure time. For more information, see Scheduled Charging and Scheduled Departure.
Charge Port
NOTE: You can also prevent the occurrence of a charge port latch freezing in place by using the Schedule settings (see Scheduled Charging and Scheduled Departure).
NOTE: If your charge port latch is frozen in place, it may not lock the charging cable in place when inserted, but it can still charge at a slow AC rate even if the latch is not engaged.
Storage
If you leave Model S parked for an extended period of time, plug the vehicle into a charger to prevent normal range loss and to keep the Battery at an optimal temperature. Your vehicle is safe to stay plugged in for any length of time.
When not in use, Model S enters a sleep mode to conserve energy. Reduce the number of times you check your vehicle's status on the mobile app, as this automatically wakes up your vehicle and starts normal energy consumption.