Originally Posted by jfinch
How are you measuring the voltage to the motor? It should be varying more then your showing. You can't just use the voltage from battery if you're not at full throttle (the esc is dropping voltage).
Note that the voltage presented to the motor is either full battery or ground. The ESC is dropping the voltage via PWM, so you can indeed just measure the voltage of the battery. Presumably the meter is true RMS and thus the current you see times the input voltage is you see is the true Pin at any throttle setting.