The idea of running a car on a 5-watt solar panel is completely ridiculous, as already explained. The problem is that the complete lack of any control over what can be posted on many websites leads to ignorant idiots (Gabrielle Taylor in this case) writing crap (just the parts about the performance of the car and running from a 5W panel in this case) which misleads people. They just generate text to fill these websites, and get paid for the advertising clicks, without adding any value and while actually destroying the information that they start from....
top speed of 70 mph, seats four, and runs off of a 5 watt solar panel mounted in the back window. I got this from this website:
The genuine EV Album entry does not claim that the tiny solar panel runs the car. It lists the charger which is used (to charge the antiquated lead-acid batteries from utility power), and says that the panel is just used to keep the 12V battery (like the battery in your gas-engine car, not the battery that drives this electric car) charged.
It's always a good idea to check reference material before believing anything from a random untrustworthy source. In this case they even provided links, including to the EV Album page which says that the car only seats two, not four, and describes the use of the little solar panel. Even if there are no links, some quick web searching is often very informative.