Hi all, I am in the process of having a NEMA 14-50 installed in my garage to home charge a Tesla Model S [yet to be purchased]. I'm retired and I only drive approximately 3k miles per year. The car will sit in the garage for a week or two at a time without being used. When it is used it is most often just very short trips around town. What would you recommend be the most cost effective charging strategy for me? Would it make sense to leave it unplugged most of the time and only charge it once a week or so? Would that save electricity loss [vampire?] or not? I have read that leaving the car plugged in all the time when it is parked in the garage is best, but that sounds like it might be overkill, and costly, if I'm only driving it once every week or two. Thanks in dance for your thoughts.