There is so far only 1 video shared on youtube with a 1500kg caravan, but this is areodynamically completely different then glider trailer.
One of the challenges will be to charge your car when the trailer is connected to it. Most chargepoints only have a parking for the car meaning you would need to decouple the trailer at each charge when you go on holiday..
Second speed is a very large contributor. If you drive right lane with al the time more or less the same speed. Consumption will be far less when you try to drive on the left lane with switching speeds.
One of the challenges will be to charge your car when the trailer is connected to it. Most chargepoints only have a parking for the car meaning you would need to decouple the trailer at each charge when you go on holiday..
Second speed is a very large contributor. If you drive right lane with al the time more or less the same speed. Consumption will be far less when you try to drive on the left lane with switching speeds.