You Can Charge A Tesla By Towing It, But You Probably Shouldn't

The official line from Tesla is that you should never tow one of its cars with wheels on the ground as “damage caused by transporting is not covered by the warranty,” but if you do, you get a little extra charge in your battery.

Leave the powertrain on (again, something you’re not supposed to do when being recovered), and the regeneration effect of the motors tops up the cells.

In this interesting experiment which involved a Model X towing a single motor 85 Model S in Norway, the latter car gained 7.2kWh over 6.6 miles. It might have been a little more had the car been a dual motor Model S, or if the Model X was able to drive faster - as only a short rope was used, the owner wasn’t able to travel fast enough to get the maximum 60kW regeneration.

Source: Electrek