Just visited the only Supercharger station in Maine--not busy, but next to a couple of decent dining options (Red Robin Gourmet Burgers and a Ruby Tuesday's). I was amazed by the additional infrastructure associated with these eight chargers. There is a large transformer (green circle), but also a sizable fenced-in enclosure (red circle) with a large piece of equipment. It gives one pause to observe how much goes into each Supercharger site... and Elon says they will double over the next two years. Amazing!