Ideally, the spindle VFD should use an actual 220V socket that contains the minimum amp fuse that will allow the appropriate draw for all of the items that will be plugged into that socket. If you elect to use a boost converter, the 2.2kW spindle VFD will need a 2200 watts or more.
My brother is using 1000W and told me his spindle is working just fine. Is it safe to use 1000W ?
I still can't recommend using a 1000W converter.
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Is 1000W voltage converter (110V to 220V) enough for 2.2kW spindle?