No charging spots and a strained electrical grid. Welcome to the electric vehicle boom.

(Illustration by Sam Island)

Then the Nelsons’ contractor gave them worse news. If three or four houses on the block all did the same upgrade, he said, pointing to a nearby transformer, the system would blow. “Basically, he said that hasn’t changed,” Rob Nelson recalled. “This whole infrastructure would need to be changed if all these houses go to 200 amps.”