The Miller Maxstar 800 is a high-power, industrial DC TIG (GTAW) and Stick (SMAW) power source built to tackle heavy fabrication, repair, and exotic alloy welding where deep penetration and arc stability are critical. Designed for users who require high output in a rugged, efficient package, the Maxstar 800 delivers serious capability for demanding jobs.
Key Features & BenefitsHigh Output & Duty Cycle — Up to 800 A peak, with 500 A at 100 % duty cycle and 600 A at 60 % duty to handle large welds and continuous work.
DC-Only Welding — Optimized for steel, stainless steel, and exotic alloys — excellent arc stability and control for DC applications.
Auto-Line™ / Universal Voltage Input — Accepts a wide voltage range (208–575 V) with no need for manual linking, easing setup on variable power sources.
Pulse & High-Speed Pulse Control — Capable of pulsing up to 5,000 pulses per second, enhancing arc stability, weld quality, and control while reducing heat input.
Blue Lightning™ HF & Lift-Arc Start — Offers high-frequency ignition or non-contact starting options for flexible environments.
Program Memory & Digital Interface — 9 independent program memories let users save and recall welding profiles.
Cooler Power & “Cooler-On-Demand” — Built-in coolant power receptacle (for Coolmate™ 3.5) and cooling that activates only when needed to minimize noise and energy consumption.
Rugged Construction & Portability — Weighs approximately 90 kg (198 lb) for the machine unit.
Wide Material Capability — Capable of welding up to 1″ (25.4 mm) material thickness in some DC settings.
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