Be a physically small country and have your entire (EV using) population arranged along the coasts using the same few roads and infrastructure (https://upload.wikimedia.org/wikipedia/commons/d/dc/Norway_p...).
Minneapolis to Houston is a 1176 miles drive. Lindesnes to Nordkapp is a 1305 miles drive.
1.5 million live in the Oslo metro which is a significant proportion but you're not right at all as far as the rest of the population is concerned.
That's not exactly true at all relative to population. Sure most of the north is very sparsely inhabited so not that relevant but even the southern coast is not at all dense (compare it with the East and West coasts in the US).
And then you have the fjords and mountains which further increase the distances and make infrastructure a lot more expensive.