Quote Originally Posted by Saab2000 View Post
I would expect about a 30-40% efficiency hit pulling this trailer, depending on speed, elevation change and ambient conditions.
I wouldn't be surprised to see a 50% hit or higher. I have watched several Youtube videos of towing tests with Ford Lightning and Rivian and range was decreased dramatically. This test with a Ford Lightning the range was 1/3 of not towing.



The issue than becomes finding a charger you can access with trailer attached or dropping the trailer while the car is being charged. I don't really know much about the model Y but I would guess it's range is greatly enhanced by it's aerodynamics. Put a parachute behind it, even a small teardrop shaped one, and it is going to hurt.