GRA said:
In more remote areas they are often further apart than desirable, as there are often few options for where to put them. An example is the current expansion on I-10 in West Texas, where the next one west of Ft. Stockton will be in Van Horn (120 miles), despite the 80 mph speed limits, sometimes high winds, 1,500' climb (net gain a little over 1kft.) and often high temps requiring heavy A/C use. The only intermediate town (with a restaurant) is Balmorhea, 54 miles from Ft. Stockton.
Yes. Some of the Supercharger legs I have done include Tremonton UT to Twin Falls ID at 148 miles; Kingman AZ to Flagstaff AZ at 147 miles plus 3500 feet of elevation gain; Needles CA to Barstow CA, 147 miles plus 1860 feet of elevation gain plus possible headwinds; El Centro CA to San Diego CA 122 miles plus 4000+ feet of elevation gain and very strong headwinds until one gets over the Laguna Mountains. I expect that some of those will get fill-in Supercharger sites eventually but for now they take some planning and care to complete, especially in an S60.
Supercharger legs longer than 100 miles, are the norm over most of the routes I drive. They are closer together here in Colorado because of large elevation changes and winter weather in the mountains, but in many places in the West they are rather far apart, as you well know.