Loads of info about R-Tech on here Barry, have a scroll down through this section or use the search option and you'll soon find what you're looking for.
ive had a look i like the look of the 200 amp dc one but it says it runs on 22 amp power supply would it still work on 13 amps if the juice was quite low say 75 amps for welding 1.5mm thick steel
cheers m8 i run my mig thru a 16 amp socket into a wall socket on full power it works fine but blows fuses after about 10 mins so i should be ok or i could go for the 160 amp