I recently asked and answered "how much extra does it cost the consumer to include solar in the design of the car?"
Aptera prices solar at $700 to add 400 watts. Extrapolating that out, the customer is paying $1,575 for 700 watts ($2.25 per watt). At 10 cents per kWh, that could pay for 15,750 kWh. That is 157,500 miles in the Aptera! Aptera claims the car can gain about 10,000 solar miles per year in San Francisco. At that rate, you'd only need 16 years to break even on that investment.
https://www.forbes.com/sites/bradtem...h=7920bbcff9fb