Glad to see Californians won't have to wait in line a few minutes at peak times at one of their busier superchargers. Meanwhile, in much of the rest of the country, we'd love to have the opportunity to wait in line for supercharging anywhere were going.
Tesla isn't favoring California (and it's main in-n-out routes) for any other reason than just pure numbers. They expand and build where there is demand. California has a very high number of Model S on the road. If I remember correctly, there are as many Model S in California as there are in all other states combined. Elon said that they are building the SC as fast as they can. That is the mandate he has given the teams. No restrictions on budget. He literally said, "spend the money as quickly as you can" (building Superchargers). So there is no lack of resources or money or intention on Tesla's side. It comes down to where the demand is. Just in LA County and adjacent Counties there are aprox 80 CHADeMo stattion, about 800 L2 charging station (average of 3 chargers per station). Just to give you an idea how massive the EV saturation is here. Following discussions here, the only reports of waiting times at Superchargers are from California SCs.
The only reason there are Superchargers connecting west and east coast is for marketing reasons. They wanted to show the coast to coast trip. There are very few Model S in most of the areas where they build these Superchargers and they get used very very little. I know it is frustrating to own a Model S and not having any Superchargers to make long distance traveling.
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Was just told by a tesla person the the four temp chargers are in place of the four permanent slots, so still only 4 slots. There will be 8 once they're done.
They are 120 kW vs the old 90 kW so that's a 33% reduction in wait time when they are fully utilized.