My Leaf got about 3.6 miles per kwhr; my Prius Prime gets about 4.2 miles. But purpose built cars are now hitting over 29 miles per kwhr. And this isn't a trike with a formed canopy and a bunch of solar; this is a four door, four seat vehicle that comes close to being practical (top speed of ~85mph.)
https://electrek.co/2018/12/17/solar-powered-car-breaks-record/#more-81037
https://electrek.co/2018/12/17/solar-powered-car-breaks-record/#more-81037