Not only does the solar panels angle mostly away from the sun, they will also be 30% covered by the rider's body.
The cargo capacity is tiny since you are limited by the rider's anatomy and can't carry oversized cargo.
There are no pedals so the only power used to move it comes from batteries which are taking up space and weight, reducing the capacity/range even further.
I don't think they're for charging while you sit on it. They're for charging while the thing is parked. You may or may not be able to park them sunward. Can't see if they can be tilted up in addition to that.