Who buys and complained that there was not enough power to bring such a device has himself to blame, either he has no idea not to read from the smart welding or how to weld, the has any of foreboding, know that to make it work sheet only can use that suggests the power of the device, are ne little rule of thumb: per 1mm x 40ampere so in 3mm sheet = 120ampere. otherwise I've only brought the device, because I do not want to have an extra gas cylinder, for which one must have TÜV, been using it for a bit of work sheet, but it does not replace a reporting-engine welding machine !!!