Regenerative Braking: Charging Electric Vehicles While Being Towed

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Regenerative braking can be used to charge electric vehicles while being towed, providing a potential emergency fix for stranded EVs too low on battery to reach a charger or wall socket.

Regenerative braking is one of the neatest features on electric vehicles. By running the motor backwards (in essence), it becomes a generator that puts electricity back into the battery while providing a braking force. It doesn't matter how the vehicle got moving in the first place - under its own power, rolling down a hill, or otherwise - it works. Clever folks put 2 and 2 together and realized that it should also work if the EV is being flat towed with its regenerative braking engaged.

We tried it onWhile tow charging has technically been possible since the first EV with regenerative brakes hit the road, it didn't enter the popular consciousness until it was featured inin which a prototype Rivian R1T support vehicle was flat tow-charged by a big rig (flat towing means all four of the towed vehicle's wheels are on the ground, like you see when an RV tows a smaller vehicle). Since then, it's been bandied about as a potential emergency fix for stranded EVs too low on battery to reach a charger or wall socket, but few have actually tried it

 

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