I know this question has probably been asked a million times before, however, l am new to this, and am still learning. I have read that for example that a 24v 1000 watt motor has the same power output as lets say, a 48v, or 72v 1000 watt motor. Is this true, and ifso, why use a higher voltage motor? Is it because the higher voltages give higher torque? I am confused. Please let me know...thank you..