That makes 1200 lb or about 500kg, the total takeoff wt is 600kg, which minus the 200kg payload leaves an airframe of 400kg, 100kg short of the battery weight by itself - doesn't add up.
It doesn't add up because the figures you quote include the weight of the massive battery frame needed to form the superstructure of the Teslar Model S car.
Base your power v weight calculations on the individual battery modules, these weight 5 kilos and deliver 1kWh.
No specs available on the batteries planned for the Lilium, so using the tesla battery modules as a guide.
In respect to what look like flaps, perhaps they are not required to reduce stall speed.
Wouldn't lifting the nose, let's say, 45 degrees and simultaneously gradually tilting the canard and wing fans downwards, produce a smooth transition from the wing providing lift to the fans taking over?
The Lilium is mentored by ESA, so hard to imagine that they are crackpots.
Mickjoebill