Miller Thunderbolt® XL 225/150 AC/DC Stick Welder



  • Thunderbolt XL AC/DC
  • 15-ft. (4.5 m) No. 4 electrode cable with heavy-duty electrode holder
  • 10-ft. (3 m) work cable with clamp
  • Power cord with 240 V plug


Precise Amperage Adjustment
Unlike other economical stick machines on the market with their fixed amperage settings, the Thunderbolt® uses Miller’s Accu-Set™ amperage dial which gives you infinite adjustment of amperage within the range of the machine.
Just Add Your Favorite Stick Electrodes and You're Ready to Weld
The Thunderbolt comes equipped with a heavy duty electrode holder and the power cord with plug already attached.  All you need to do is grab your favorite stick electrodes and you're ready to start welding.
Infinite Current Control
Adjust output by as little as one-amp increments. Get the exact heat you need.
High DC Weld Output
Up to 150 amps available at 20 percent duty cycle.
Output Selector Switch
Quickly select AC, DCEP or DCEN without adjusting the output leads.











Stick (SMAW)


TitleThunderbolt® XL 225/150 AC/DC Stick Welder
Industries InterestsAuto / Cycle (Racing, Customizing, Restoring)
DIY / Home Hobbyist
Farm and Ranch
Metal Art / Sculptures
Education / Training
Maintenance and Repair - In Plant
Current TypeAC / DC
Input Hz50 / 60 Hz
Input Phase1-Phase
PortabilityRunning Gear / Cart (Optional)
Net Height18.75 in
Net Length17.5 in
Input Voltage220/230/240 V
Max Open Circuit Voltage80 VDC
Net Weight104 lbs
Rated OutputAC: 225 A at 25 V at 20% Duty Cycle; DC: 150 A at 25 V at 20% Duty Cycle
Weldable MetalsMild Steel
Stainless Steel
Net Width12.75 in
WarrantyMiller's True Blue Warranty
Amperage Range30 DC - 160 DC
30 AC - 235 AC