I saved for a year to get my R-Tech 180, didn't use it for 4 months, but on starting to use it now puts down a great weld compared to my old SIP, well worth the investment
Just had a reply from the German company which sells that welder on Amazon:
"Dear customer,
Thank you for your interest. The device comes with a two-year warranty. In the event of a defect, you will always have to send the device to us in Germany.