There are some, very limited, solar facilities that are able to collect energy in stationary storage batteries. However, the output from these ends up being on the order of single-digit percents of the day-time solar generation.
I would be interested to know how many people would go out of their way to charge at a charger if they knew:
* power came from wind, solar or hydroelectric plants;
* power came from the above, plus nuclear plants;
* power initially came from solar, but at a 10% loss, was stored to a battery, and then used, at night, to add power to your electric vehicle.
But joking aside, we need a lot more than solar. It's a terrible energy source. I'd be more encouraged if they diversified their energy sources to include other renewables and nuclear. It's sad to see investment thrown at a bad technology, frankly.