I don't like the idea of putting a 1kW motor on an upright trike that doesn't lean. The reason it only has one speed is to prevent you from riding it fast and tipping over when you turn. Also, it comes with steel wheels which are marginal at best. Adding an extra 100 lbs of batteries virtually guarantees wheel troubles. And let's talk about brakes: You need really good ones to handle the extra weight and speed. I upgraded the disc brake on my 800W ebike to a 10" rotor when the 6" proved inadequate. I don't believe your trike's brakes are safe for the use you have in mind.
Fully enclosed trikes are called
velomobiles and, as far as I know, they are always recumbent.