Given some charging loses and inefficiencies you’d probably need over 10 kW of panels to provide the 7 kW level 2 charge, That would be about 1000 sq. ft. of panels or 2.3% of an acre. It would fit on many large residential roofs.
While it is an attractive concept to charge an EV directly from sunlight without any tie to the utility grid, it would be expensive and wasteful to do in practice. When the sun is shining and the car isn't there to accept the charge or its battery is full then the expensive panels are wasted. It much better, when possible, to connect to the grid like most solar power installations. Then all solar power produced that isn't used immediately is fed to the grid. And when you need power but sun isn't shining you take some power back from the grid.
You could probably put together a small stand alone system that would support the lowest level 1 charging of 120V 6A 700 Watt. That would only require 100 sq. ft of panels, might be semi-portable and cost you a few thousand dollars for something that would recharge your car in about a week in the sun. Not particularly practical or cost effective.
Now imagine what it would cost to put together a level 3 DC fast charger at 50 kW.
Near me there is a 400 kW solar microgrid with storage that has a couple level 2 chargers. I might have to drop by there sometime for a charge.