FWIW the appeal would be for those who can’t get their own roofs (aka majority of worlds population). The price point is likely to capture the initial hype.
Wouldn’t be surprised if the car itself is more like recumbent bicycle - ultra efficient vehicle with solar on top.
This comment is spot on. Configuring the most expensive EV I could think of (Porche Taycan Turbo S) with all the options I could easily add comes to about $225K USD. That leaves ~$30K USD for a solar install to match the price of the Lightyear..
For this price you'd be better off buying a luxury ev, getting a new roof on your house and installing solar there. you'd have money left over and be able to actually put a meaningful charge on your car using solar that way.