No chance. The batteries are 280 Watt hours, solar cells generate about 20 Watt hours per square foot, and the standing pads are probably no more than half a square foot (being generous) so even if you could have an edge to edge panel it would take 28 hours of direct sunlight to fully charge. Even if they were perfectly positioned all day they wouldn’t get more than 7 hours of sun, only 3-4 of those at peak power so it would take something like 6 days to charge. That’s assuming they’re aimed in the right direction and not blocked. Riding them covers the panel and gets them dirty which reduces efficiency and adding the panel increases the cost and maintenance of the scooter considerably.