3 links have been added on this idea.
  1. Great idea. The issue with water electrolysis can be solved by using another renewable energy source such as solar power. You can even have a hybrid car, which uses excess energy from the solar system to power the engine.

  2. The technology could be revolutionary, even greener than electric cars. However, you still need a reliable and green energy source to turn water into hydrogen (which is what powers the car). Read this article here to get a better understanding. https://www.popularmechanics.com/cars/a3428/4271579/