Our sun, a nuclear fusion source which is already working reliably for more than 5 billion years, produces an extreme amount of energy. Within 6 hours, deserts on Earth receive more solar energy than we use in a whole year globally. Why do we keep ignore this most power full energy source? For the world energy demand (18.000 TWh) we need only a surface area of 188 x 188 square miles with Concentrated Solar Plants. This is a small thumbnail on the map of Africa. Germany has seen the light and is investing 500 billion euro's in Desertec. A CSP plant runs 24 x 7 hours on full power (even when the sun is away because it can store sun heat in molten salt). These CSP plants can easily replace nuclear and coal power plants.

Why is that? The current (single) battery in any car is already standardized (form factor and voltage) and can be switched easily, why not introduce these standards for full battery packs?

One could imagine a standard battery pack standard for small, medium and large cars. Another option would be that smal cars needs a single battery pack, and larger cars need more. Similar to small batteries like AAA, AA, D, etc...Some devices only need one battery, some need 8 batteries.