Portable, inverter-based welding systems ET 220i (29.5 lb) and ET 301i (35.9 lb) offer full digital control of TIG and Stick welding arc. Both units automatically accept single- or 3-phase, 50 or 60 Hz, 208–230 Vac or 460 Vac primary power (±15%). When connected to single-phase power, units offer max TIG output range of 5–200 A. On 3-phase power, ET 220i provides top TIG output of 220 A and Stick output of 170 A; respective values for ET 301i are 300 A and 200 A.