Mafell SKS 130 lock mortiser. 230 volts 1600 watts.

Tool is 230 volt; Mafell does not make a 110-120 volt version. Timberwolf sells this 230v tool and suggests a Powerbright 3kva transformer for it. There are other Mafell tools sold here in the US by TW which are 220-240 volt.
I also need the transformer to power a Fein 220volt battery charger. A Fein US distributor does sell their 220volt charger.
Does anyone have experience with the black box Chinese step-up / step-down transformers branded Powerbright or Simran? Opinions ?
https://www.110220volts.com/ac-3000...picPk_ake0v9G2Hlqba_DChA1tQr3CaUCIaAo5-8P8HAQ

I assume since TimberWolf sells them for use with Mafell and other expensive Euro tools these transformers must be fine? I would think if these Transformers were shoddy TW would not sell them. But as they are Chinese and kinda cheap I am still a bit cautious.
I was thinking of Kreiger step-up / -step-down transformers, and while they are also Chinese the exterior design seem to be of higher quality , and cost almost double the price of the Black box ones. Anyone here have any experience with Kreiger transformers?
Kreiger only makes them up to 1700 watts but it is continuous watts (per Kreiger's specs) so it should be fine for my 1600 watt Mafell? If it was intermittent watts I would need a transformer atleast 50% more than the wattage of the tool ?
http://www.kriegermfg.com/product/999/


Tool is 230 volt; Mafell does not make a 110-120 volt version. Timberwolf sells this 230v tool and suggests a Powerbright 3kva transformer for it. There are other Mafell tools sold here in the US by TW which are 220-240 volt.
I also need the transformer to power a Fein 220volt battery charger. A Fein US distributor does sell their 220volt charger.
Does anyone have experience with the black box Chinese step-up / step-down transformers branded Powerbright or Simran? Opinions ?
https://www.110220volts.com/ac-3000...picPk_ake0v9G2Hlqba_DChA1tQr3CaUCIaAo5-8P8HAQ

I assume since TimberWolf sells them for use with Mafell and other expensive Euro tools these transformers must be fine? I would think if these Transformers were shoddy TW would not sell them. But as they are Chinese and kinda cheap I am still a bit cautious.
I was thinking of Kreiger step-up / -step-down transformers, and while they are also Chinese the exterior design seem to be of higher quality , and cost almost double the price of the Black box ones. Anyone here have any experience with Kreiger transformers?
Kreiger only makes them up to 1700 watts but it is continuous watts (per Kreiger's specs) so it should be fine for my 1600 watt Mafell? If it was intermittent watts I would need a transformer atleast 50% more than the wattage of the tool ?
http://www.kriegermfg.com/product/999/
