I drive from Seattle to Spokane ten or twelve times a year. A little over 300 miles. In both my S85 and my P90D Model X, I Supercharge in Ellensburg and/or Ritzville WA to complete the trip. With charging to 90 or 100% from home I'll need fewer kWh's along the way to make the trip. With paying for excess Supercharging will it save pennies or dollars? I can afford it either way, but just wondering.