The vehicle is even capable of four-wheel drive. Credit: YouTube Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Engineering an efficient, affordable solar-power car has eluded automotive enthusiasts for decades. While the technology is increasingly becoming more cost-effective and integrated into global energy grids , using solar cells to reliably propel a standard-sized vehicle long distances simply isn’t quite there yet. But that doesn’t mean you can’t rig a smaller ride to ferry you on shorter trips.  As YouTuber Simon Sörensen demonstrated earlier this year, all you apparently need is a couple of e-bikes, some sustainable energy add-ons, and a little bit of soldering know-how to engineer an extremely enviable, two-person solar car. The diminutive vehicle isn’t a weakling, either. Thanks to his setup, Sörensen even managed to pack his project with four-wheel drive.…