Hi Mike
I would have thought that a 3.5 kVa would have a hard time running any welder, but I could be wrong.
Regards
Tjupurula
G'day, I bought a eBay 3.4kva pure sine wave inverter gennie. (For just under $500 delivered at the time, cheaper again now) with the hope to be able to take it and my Esseti 150amp caddy welder on some of those bigger trips as a bit of insurance if something breaks. I read this thread and thought it was about time to make sure it will actually run the welder. I was using a 2.5mm rod and was able to take it up to 90amps. At this setting I was able to weld the 4mm steel with ease. At 95amps the overload cut it out.
The gennie engine certainly does sit up and sing with this much load but I did about a 4inch fillet weld continuous and it didn't miss a beat. So I'm happy that it will keep me out of trouble if I need to weld with it.
You probably already know, but don't run an inverter welder off a non pure sine wave gennie or you can blow up the board in the welder.
Cheers
Wes