Dera Inverter Welder DK-MMA-300

- Efficiency: Quality inverter machines, such as the Weldforce inverter welder range, will have an efficiency rating of about 80-90% while conventional welders have a significantly lower efficiency of about 50%. This is due to the fact that the larger transformers in conventional machines have greater resistance and therefore lose a significant amount of power (or energy) through heat dissipation.