Cant get that website to load....I have a nxtig 250 from tigmigit.com . It is basically the same as the rtech model also with 2 years warranty but almost half the price I paid £760 posted . I also had the same problem with it tripping out so that's pretty standard on a high powered 240v unit I guess . Very happy with the performance so far , I also have one of there 250 amp inverter migs and a 60 amp plasma . All very impressive for the money .Defiantly worth checking these guys out before spending your money on the same kit from rtech .