The Royce Welding Machine 300S (often called MMA-300S or RAC-300S) is a portable inverter arc welding machine designed for both home and light professional welding work.
Input Voltage: 220–230V (single phase)
Frequency: 50–60 Hz
Current Range: 20A – 300A
Electrode Size: 1.6 mm – 4.0 mm (up to 5.0 mm in some cases)
Input Capacity: ~8.7 – 17.2 kVA
No-load Voltage: ~65–75V