I have received my car in Japan on September 2014 and after a few weeks I decided to range charge with 80A wall connector. What I got was only 394 km or 246 miles of range, with firmware 5.12 (101.6.7). Yes I know Tesla has strange build numbers on Japanese cars and they are not updating our cars, but I think it's irrelevant. Is this normal to have this range when new? Last week I got 390 km = 243 miles. I only had 3 or 4 times of range charging, other times I charge to 70%-90% daily. The garages at home and work are warm even in winter (underground).