@Doctorandus_P , where I live there are no competitors for welding inverters , firstly ,imported inverters are very expensive , also nothing last for ever , you know at some point you'll have maintenance issues in which case you'll have to send it back to the company , they will charge you money and send it back which people aren't willing to do. I have contacts with automotive industries that are setup here like KIA , SUZUKI ,COROLLA, CHANGAN , HONDA and even more , non of them have inverters installed ,, hence big electricity bills and I'm sure it costs them the quality weld as well . trust me nobody wants to order 1000 welding inverters in a company where your bound to have maintaince issues and nobody in the country is willing to fix it , plus waste of time on the assembly line . and calling someones product a "cheap knockoff" is a harsh statement without even looking at the design .