Can Anyone Satisfy Amazon’s Craving for Electric Vans?

The company has big plans to turn its delivery fleet green. But very few of the vehicles are made right now.

In the fall, Jeff Bezos tweeted praise for Rivian, a start-up under contract to make 100,000 electric delivery vans for Amazon, and its founder, R.J. Scaringe, calling him “one of the greatest entrepreneurs I’ve ever met.”

Then, Mr. Bezos worked in a jab: “Now, RJ, where are our vans?!”

The comment may have been in jest, but the problem he raised is a serious one.