Above (click to zoom) is a chart showing WLTP-standard solar-only driving ranges for the three solar cars from my last post (battery ranges not shown here):
- Solar Team Eindhoven’s Stella Era, winner of the BWSC Cruiser class
- Lightyear One, a commercial solar car from the Netherlands
- The Sion electric vehicle from Sono Motors
These solar-only driving ranges are marked on a smoothed distribution of electric vehicle driving patterns reported in this paper (distance driven per vehicle-day on days when the vehicle was driven).
The sleek Stella Era has a solar-only range more than 4 times the mean 70 km driven. On more than 99% of trips, Stella Era can operate solar-only, and, on average, its solar panel produces substantial excess electricity which can be donated to other vehicles.
Lightyear One has a solar-only range less than the mean 70 km, but is still able to operate solar-only on 57% of trips.
The less expensive Sion is able to operate solar-only on 19% of trips, and has a useful solar boost to its battery the rest of the time.