Traded in my 2013 Models S for a Model X on December 20. Due to holiday travel and subsequent cold/flu, haven't driven it much. But wow...nearly twice a day it loses 10 or more miles of charge and then recharges...far more than my Model S ever did. I called Tesla service and the woman I got said, "That's because the Model X is a heavier car. It uses more power." Clueless. The car isn't moving or even on. That didn't deter her from insisting. 15 to 20 miles per day @ approx. 350 watt-hours/mile, that's 5-7 kWh/day...more than I use in my home. That's like running an electric heater for hours. This is in a closed garage, never colder than low 40s. I have climate off, key not in vehicle...what could possibly be using that amount of energy?