This Lightyear One's company was started by some students members of the Stella Solar car project, Solar Team Eindhoven. Now there are a new Stella Solar car (4* or 5* version) called Stela Era, whicj won the last World Solar Challenge.
More lightweight and higher range than Lightyear One, since it weights less.
But the inside space and outside look (low height) are a bit less apeal as a family car.