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well a simple way of thinking about voltage and amps is this:
Watts (measure of energy without any time attached) = volts X Amps
or look at it as a circle, the top half is watts and the bottom half is spit into volts an amps.
think of volts as the pressure in a pipe, and Amps as the amount of water passing through. If your pipe (motor) stays the same, and you double the pressure, you half the Amps needed to get the same work done.
Example:
a 48V motor with a rated amps of 100 will do 4,800 watts of work.
a 96V motor with a rated amps of 50 will also do 4,800 watts of work.
hope this helps you figure out what you need.
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