I'm expecting delivery of my Model S85 in 3 weeks so I had a 100A and 50A service installed in my garage. I had the HPWC installed to the 100A circuit and I can't wait to try it out. I had a 50A service pulled since my electrician was running the line for the 100A and it didn't take much for him to run the additional service. I plan to only drive 60 to 100 miles a day. Do you think the 100A HPWC is overkill and will consume much more electricity?