The GM Sunraycer was only the winner of the 1st World Solar Challenge in 1987, but there's have been 100's of cars built like it for solar challenges around the world since then, including 16 different ones built just by my alma mater, the University of Michigan. Many have competed in the 15 World Solar Challenges that have happened since that 1st one, as well as multiple American, South African, and European Solar Challenges, among quite a few others.
Keep in mind, all of these cars, including Sunraycer, are race cars first. They are designed to be the most efficient vehicles possible because the amount of power available is still quite small. Modern solar powered race cars don't look quite like Sunraycer due to changes in race regulations and rules, but they are still the same in that they are basic ultra-efficient electric cars, with a battery, that just happens to also be charged with solar cells. All of them start a race with a full battery (normally about 5kWh), charged from a normal electric source, and then run the race purely on solar power.
There are challenges that aim the regulations at making more "practical" solar powered race cars (including a class within the World Solar Challenge) that hold multiple passengers or cargo. But these are still race cars, with specific usage scenarios for charging and no attempts at crash protection or other regulated features that are needed for a production car.
As much as I love solar powered car racing, I will be one of the first to say there will never be a practical solar powered car that the general public can use. Between the lack of power, the fragility of solar cells in general, the limits on weight due to crash protection regulations (among other regulations), and general usage scenarios that don't lend themselves to what solar powered car needs, it's just never going to be realistic.