Quote:
Originally Posted by bennelson
Some commercial motor controllers also have a pin in for when you are in reverse. When the controller knows you are in reverse, the controller limits speed to half.
On my Electric Geo Metro (With an Open Revolt controller) I just use the mechanical reverse gear, and I have every bit as much speed/power in reverse as I do in forward - actually even more, as reverse gears tend to be even lower than 1st, and I NEVER use first gear in my car because of how much torque the motor has.
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On my parents EV, the reverse lights are wired up to a relay that adds a resister in parallel to the pot box, so when you shift in to reverse it limits how fast you can go backwards, some people also add a switch on to the dash that does the same thing, this can be useful for when you want to deaden the throttle a bit, for driving on to a trailer, ramps for getting under the car or when you are letting someone else drive your car and want it to be throttled back a bit.