"A total of 330 SunPower cells are producing 1,208 W peak at an efficiency of 24 %.
This amount could provide power for up to 40 km in one day. However, this is a theoretical maximum value which is highly unlikely to be achieved under real-life circumstances."
"For the solar panels we use monocrystalline silicon cells."
https://www.indiegogo.com/projects/sion-a-solarcar-for-everyone-car-solar#/
7.5m^2 of panels
So there you go. Those seem reasonably honest claims to me. Having panels on the side of the car will make a big difference. It's almost as good as having panels which track the sun.
Unfortunately, no.
1200 watts STC PV can, even under ideal real world conditions, produce perhaps 1000 watts of usable power over any meaningfull length of time. But ideal conditions will NEVER occur in this case. In fact far from it:
There will never be a time when anywhere close to all the panels are in full sun.
Roof and hood panels will only ever be in full sun near midday and even that will only occur for part of the year (unless near the equator) or not at all if too far from the equator.
The door panels will never see direct sun unless the car is on an Arctic or Tierra Del Fuego plain mid-summer and slowly driven in a circle to follow the sun....
Even if and when any modules on this car are in full sun, they will be unable to produce anywhere near to their theoretical max power due to the heat that will rapidly build up. Of course some sort of active collong could be engineered but that would use power...
So in the real wotld, that much PV, in that varied array orientation, integrated into the skin of a car in that way, could be expected to produce on the order of 1-2 kWh of energy if the car is in the full sun for a full day.
How much range will that add ? ....
Oh, and 1200 W of Sunpower PV cells alone will cost at least $4k or so..