Earlier quoted context omitted.
When EV gets popular enough won't all petrol station install chargers too? When this happens the super charger network will not be a large advantage. The only issue I see is if each company creates it's own "super/fast" charging system and DRMs it for "security" reasons.
The best place to charge an EV is wherever the car spends the majority of its daylight hours (which for many workers will be the company parking lot). That way they can be charged directly from solar PV during the peak hours, avoiding the necessity for storing that energy anywhere else.
Unless solar panels evolve _considerably_ in efficiency, or you cover a gigantic area with panels for a single car, I believe that’s not really a viable option