That's in spite of the range issue, and is due to the Norwegian government carrot-and-sticking heavily towards electric. Maine has no such incentives, and is sparsely populated, which doesn't play to the strengths of electric cars.
Makes it much easier if there's already infrastructure.
Norway shows that you can have EVs in a place that is very cold if you shovel cash at buyers. It doesn't prove that weather wouldn't be a central factor in a place like Maine.
1: https://www.oecd.org/climate-action/ipac/practices/norway-s-...
Bar Harbor, the destination of most of the out-of-state Teslas, has almost nowhere to charge. I went to a hotel once which promised to have 4 level-2 Tesla chargers. All of the spots were occupied by ICE trucks. I went in to point out this problem to the clerk. She shrugged her shoulders and said, "they're probably our customers." Apparently the chargers were just there to lure in suckers. "Yes, we have chargers, but good luck using one. They tend to be parked in by ICE pickup trucks. We're helpless to do anything about this." I failed to check to see whether the trucks had Maine plates. They didn't look like typical customers of this hotel.
Around Portland things are a bit better. And new stations are being put it. It's just behind neighboring states.