Curious if they bothered to comply with the GVWR for the vehicle.
An extra 730lbs is most of the typical payload capacity for a typical car.
The model S has a GVWR of 5600lbs and weighs about 4600lbs meaning you can only put about 1000lbs of stuff in/on it safely.
With this extra battery weight there isn’t enough capacity left to carry more that two typical adults let alone any luggage.