This bit of news made the rounds late October. It’s cool but they go to lengths to, IMO, misrepresent the achievement. It took them 1.5 weeks to do this. It has a great big battery but they give the impression that you can drive more or less continuously from solar alone. No mention in any of the many articles you can read on this (they must all be sourced from the same press release or similar) about charging rates to charge the whole battery. The best you can see is on some of the articles they say cloud cover could impact range by 50km. At what sort of speeds that is based on is up to anyone’s guess.