Power In does not Equal Power Out
There are two things that will make drive current, power and power factor calculations difficult.

The drive input current will have a high percentage harmonic content, particularly with a light load. That means that means that the input power factor of the fundamental will be about .95 while the total power factor will be much lower.

The DC bus capacitors in the drive carry all of the reactive current of the motor. None of the motor's reactive current will be reflected in the drive input.