Actually,due to the fact that solar racers are exposed to a limited exposure driving environment,they can use wing-derived bodies of very low drag,although not considered 'practical' for a daily driven automobile.
The NUON NUNA series of solar racers,in calm conditions can reach Cd 0.07 due to their large areas of laminar boundary layer,low skin friction.
Here is an example of CFD testing of such a car
A more traditional 'pumpkin seed'/ 'flattened-torpedo' HONDA Dream only achieves Cd 0.10
The Cambridge University Eco Racer (CUER) also only achieves Cd 0.10.
So,so far,the wing-type body has an advantage for overall low drag.
As to the canopy on your solar racer,I suspect that in plan-view,the air is directed around the sides,rather than over the top,and the flow would be better than imagined if only looking at the side of the car.
Here are some canopies
