Inverter electrode welding machine with direct current (DC), for use with a wide range of electrodes: rutile, stainless steel, cast iron, etc. It features a compact and lightweight design (4.9kg) and provides high stability of the welding current despite fluctuations in the network voltage. It also provides thermostatic protection, overvoltage protection, undervoltage protection, overcurrent protection, and engine generator protection (+/- 15%).