You will need a good power supply to get the max amps out of it ,iirc over 120-130amps we use to trip our normal workplace 110v trips ,we had 32amp sockets for flat out welding ....was a while ago
As long as it will do the job im not bothered. its about time i get with the times as im using a 50kilo 200a tranformer welder. also you can use these for tig so that would be nice too.