So to get 200 miles, at 3.5 miles/kWh that would be close to 60 kWh. To pump 60 kWh in 15 minutes would require 240 kW Supercharger.. Thats almost double of what is there today.
hmm.. I doubt it... maybe..
A bank of 5 Powerpacks per stall could provide regulated DC to a vehicle at a 250kW rate. Also provides the buffering to the grid/ solar.