You don't need fast charge for every joule. A regular 20A cord (or 2A 1kV to reduce copper investment) can keep a car topped up just fine. Then the only issue is producing enough net watts per week (which dovetails excellently with variable production)

If we correct our insane legal framework around the use of streets then a vehicle which consumes 100W average when in use, charges itself with a single 300W panel and does 20mph covers 95% of uses.

Either option is vastly more viable than a multi trillion dollar handout for infrastructure to help sell luxury cars.