Spot on Rob and why i had to go for a 7.5kw to run a 2.2kw motor!
Current draw was like starting up a 9hp motor.
Its not only the startup current but the running load, ok in theory but in practice make the machine worthless.
I have a rotary convertor 5kw and did have a 5.5kw digi invertor. Digi no chance of powering up without gearing down and maybe a push start. Rotary groaned like no tomorrow really scary.
Heres the key, both rotary 5kw and 5.5kw digi inverter couldnt cope with normal machine use. Motor was too easy to slow down with menial cuts 1/16" deep, even worse was the rotary sounding like it was gonna explode, noise unbearable.
Using a 7.5kw inverter i cant get the spindle on same machine to slow, not even for 1/2 a sec facing off 3/8" cut in 6082 on 5 1/4" dia, thats the difference.