Talk of The Villages Florida - View Single Post - If you are thinking about buying an EV, read this
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Old 08-12-2023, 12:53 PM
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Quote:
Originally Posted by dougawhite View Post
No such thing as a functioning perpetual motion machine, sorry. Adding a generator powered by the EV car's motion will not return as much power to the batteries as it takes to propel the vehicle, thus you're actually draining the battery faster.
Time to go back to engineering school.

The car's momentum needs to be converted into something in order for it to stop. Friction brakes turn it into heat which dissipates and is lost. Running the motor in generator mode converts some of that momentum into voltage to charge the battery. No, it does not return as much power as it took to get the vehicle moving but it does return some. If you happen to be using regenerative braking going down a steep hill it will return quite a bit.

Regenerative braking certainly does not drain the battery faster.
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