I got home from a road trip on Saturday with zero miles of range left. I had to take another relatively long trip on Sunday so I needed to charge in range mode. I've got a separate meter for the Model S NEMA 14-50 so this seemed like a good opportunity to see exactly how much energy it takes to go from empty to full. Or almost empty, since zero miles showing doesn't equal zero battery capacity remaining. Anyway charging at 240 volts / 40 amps it took a little under 10 hours to charge and used 89 KwH. Not bad. I'm not sure how much is left in the battery at zero mils showing but I'm guessing that the 89 KwH consumed during charging translates to about 80 KwH in the battery. I was expecting more loss due to cooling etc.