“So eone posted info about a techno.oy where the electric car recharges itself while running”
I think most have that, it’s regenerative braking. Beyond that, no one has figured out a way to capture and store energy lost to heat (which includes friction and wind resistance). A couple of panels on a car would probably be ok, if you’re willing to wait a month or so for it to charge.
Here’s an article about what you stated-
https://www.eetimes.com/self-charging-cars-to-become-the-evs-of-the-future/
In it they mentioned how far behind the electr8c grid is when it comes to electric cars- we are nowhere close to being able tO go all electric
” It is estimated that it would take $7 trillion and 20 years to upgrade the world’s electric grids to accommodate the expected increase in the number of EVs”