Re. 400V chargers : I assume they are planning to deploy these outside urban centers, which would make sense. So far, only 240V 30A have been deployed in urban settings....
Or at the NH liquor store, which is around the same area, if I remember correctly, which is an obligatory stop on my way to Ogunquit from Montreal.
OT : To get to Quebec City, with a supercharger in Lebanon, you will soon find 5 more J1772 chargers in Sherbrooke, using a long lunch, before making it to Quebec City, becomes possible :
Autoroute 73 N to Boston, MA - Google Maps