How many solar panels to charge your electric car?

"...To consider this question, we'll use the standard Tesla Model S as a baseline for estimates. This Tesla has a battery with a 75-kWh capacity... "The average 250 W solar panel can generate around 30-40 kWh of AC power each month... "since the average driver will travel approximately 37 miles a day – this translates to roughly 12 kWh of electricity. With that in mind, a much more realistic set would require approximately 12 solar panels..." 

https://www.powerelectronicsnews.com/how-many-solar-panels-to-charge-an-electric-car%EF%BB%BF/ 

"for an average American driver, a typical EV will require about 4,000 kWh of electricity per year. According to the most recent EnergySage Solar Marketplace Intel report, the most frequently offered solar panels on EnergySage are in the 320 to 330 Watt range. Finally, the production from your solar panels will vary from region to region...Depending upon where you live, charging an electric vehicle typically requires 7 or 9 solar panels." https://news.energysage.com/how-many-panels-do-you-need-for-your-ev/