I would like to use VFDs for motor sizes ranging from 0.4kw to 15kw. My idea here is to reduce the generator foot print to the lowest possible value. My thinking is that, theoretically, I could use a 25kva generator set to drive a 20hp motor (80% operating capacity) and since the VFD eliminates the high starting current I should be okay. But my biggest concern is: how do I account for harmonics in this system. What harmonic factor can I use to correctly size the generator. Is there a filter solution for sizes 0.4kw to 15kw used in a similar set up as above.