I'm trying to figure out how any pol or bureaucrat would not know that battery performance falls off in cold weather. Can you say, "Sears 'Die-Hard' commercials"? But performance falling off at 50F? Damn! BTW, batteries don't like hot weather, as some Nissan Leaf owners discovered a few years ago.
That's why them glorified golf carts don't work up in here. My sis has a hybrid though, and that does alright... But it is on the gas side all winter.