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The electric motorcycle is 36 volts, so using a 36V contactor presents no problem.
I was thinking that having a real "key" on the dash to turn everything on and off would be nice.
I have heard that it is possible for a controller to fail in the full on position. Currently, my battery cut-off key is down on the side of the cycle, near my right ankle. While reachable while riding, it is NOT quick and convenient to reach. A key on the handlebars would be.
The battery cut-off is also not rated for real high amperage. I have been told that in theory it could melt in the ON position and then not be usable for an emergency cut-off.
There really isn't any amperage going through the cut off when the cycle isn't going, so turning it ON and OFF shouldn't cause any internal arcing.
I figure this is also a good time to experiment with contactors, so I know what I am doing when I work with contactors on the electric Geo Metro conversion.
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