There is no energy grid anywhere in the world t1hat has ever run only on intermittent power sources.
As for the hypothetical BMW factory, what are the workers meant to do while the power is low?
You have to be honest that cost of such setup would be significantly higher because you need huge amount of storage, or large overcapacity, or both.
Lastly, zero people died from radiation at Fukushima - the tsunami killed 15,000. Why is anyone surprised that a natural disaster can damage a building? Do we have tsunamis in UK and Germany?
The story is completely overblown.