With 2000W and 5000W pure sine wave inverter in the actual test, if it is only spot welding is no problem, but long welding is not enough, the current is not enough. Remove the circuit breaker protection of the inverter (the welding machine is actually a short circuit), and the long welding has been improved, but it is easy to burn the inverter.

The use current of the welding machine is much larger than the output of the inverter, so it can not be used normally.