What do I go for kemppi minarc 200 evo or kemppi kempact 251 r is going down to 10 volts the evo 200 is 15 volts both going down to 20 amp which one would be better for thin sheet metal ?
(I had to read you post serval times before I fully understood it. Through of lack of punctuation, and the non existence of Capital letters. Because of this you will find a lot of people just will not read your posts)
Both will do thin material without any problem. The 10 or 15 volts don't really matter and it depends what you want from the machine and how much you want to spend. If you want portability get the EVO but if you want the Kempact and money is no matter then get that. You will be able to weld down to .8mm easily if they are as good as my minarc mig 180.