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MTS Lightning 275 (with TIG PACKAGE)



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  • digital_display
  • igbt_equipped
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The Lightning MTS 275 is the latest in the MIG/TIG/STICK line of welders to feature AC/DC TIG welding capability.  This new unit features revised synergic function now called "Power Set" and now includes auto set parameters for all three modes.   The 250 Amp unit excels not only in features, it also excels with performance.  The new design allows the user to view most all relevant settings simultaneously.  This reduces scrolling effort and allows near instantaneous adjustment of all common parameters in use.

The new PowerSET function allows the customer to enter basic operating parameters in MIG, TIG, or Stick mode, and automatically selects the proper Amps and Volts (where applicable) for the user, as well as a few other possible adjustments.  This new unit also features a Flux-Core mode for operation with most common types of Flux Core wire (without gas/self shielding).   As powerful as the welder is, it is also capable of operating on 120V if the unit needs to be carried to the work.

Of course, you'll have reduced output, but you will not suffer for lack of available duty cycle.   As far as operating duty cycle at full-tilt output, all processes feature 60% output at maximum amperage for the Process. That means, for MIG, at 250 Amps, you'll have 60% duty cycle available.  For TIG, at 250 Amps, you'll have 60% duty cycle available.  For Stick, at 200 Amps, you'll have 60% Duty Cycle available.

Add the PowerCart300 and the Powercool 400 for a convenient, stacked design to complete this welder.


PLEASE NOTE: This machine is fitted with a 15A plug for commission purposes only. To achieve the maximum performance out of your Everlast Machine please ensure your current breaker and wiring/socket setup at your place of use is sufficient enough to achieve this. For example you may be required to upgrade your breaker to a 32A dedicated circuit to suit, therefore allowing you to achieve your machines full duty cycle. If in doubt please contact your local licensed electrician for more info prior to purchasing and please see terms and conditions/warranty for more information.

Manufactured and compliant with IEC60974.10, CE Guaranteeing your electrical safety and performance. INDUSTRIAL USE ONLY


Download PDF Manual HERE

Out of stock


  • New! PowerSET function for easy MIG, AC-DC TIG, and DC Setup
  • Large, easy to read 480 resolution TFT Digital Screen
  • Displays multiple relevant settings simultaneously, allows quick adjustment
  • High Frequency and Lift Start AC and DC TIG modes for a true "all in one" design
  • Digitally controlled operation in all modes improve control and dependability.
  • Operator friendly panel without complicated hidden menus or adjustments with grouped controls.
  • Synergic function MIG automatically adjusts wire speed while voltage is increased or decreased. This maintains a preset ratio of volts and amps that can be tweaked manually by user for best operation.
  • Manual Override of PowerSET function allows the user to regain control of at any point to fine tune settings and allows operation in full manual mode if desired.
  • Weld Aluminum, Stainless, or Steel with Synergic MIG function with wire diameter from .023- .045" (for full range of sizes and flux core use, purchase optional drive rolls).
  • Memory function provides easy saving and recall of your favorite settings.
  • Spool gun with PowerSET function with optional spool gun. Ideal for welding aluminum.
  • TIG torch and Foot pedal included for TIG. Regulator included. 
  • Built in dual gas solenoid and connections for TIG eliminates need for gas valve torch used by competitors
  • True DC CC/CV Multi-Process design eliminates needing or carrying multiple units for one job.
  • AC capability on TIG allows user to weld aluminum. Industry first for this type design.
  • Pulse TIG capability increases control and weld quality.
  • Compact and light weight design makes the unit extremely portable, ideal for on-site fabrication.
  • Adjustable Burn-back control keeps the wire energized after wire has stopped feeding to allow the wire to melt back to a desired length without retrimming wire before restarts.
  •  12"  Diameter wire spool capacity maintains portability while maintaining productivity.
  • Adjustable MIG Wave arc force control manages slope/ inductance and fine tunes arc characteristics.
  • Adjustable stick Arc Force and New Hot Start controls allows the user to dial in desired Stick welding performance.
  • TIG Up and Down slope allows the user to control the end of the welding cycle.
  • 2T/4T torch trigger/latch function offers stepped control welding with TIG and MIG.
  • Adjustable Pre and Post flow for TIG and MIG operation improves over all weld quality.
  • 250 Amps of MIG and TIG power offer more than enough power to get the job done. 200 amps of stick welding power can be used with up to 3/16" welding rods.
  • Dual Voltage design will operate on 120V or 240V.  Output on 120V is limited to 150 amps MIG/TIG/ 120 amps Stick.
  • AC Wave form control with Advanced Square, Triangular, and Soft Square Waves


  • Type: Digital/Micro-controlled IGBT Inverter
  • Output /Process Type: MIG, DC TIG, DC Stick
  • Voltage/phase: DUAL VOLTAGE 120/240 1 PHASE
  • Max Rated MIG Amps: 240V @ 250A
  • Max Rated TIG Amps: 240V @ 250A
  • Max Rated Stick Amps: 240V @ 200A
  • MIG Amps/Volts @ Rated Duty Cycle: 240V: 250A/26.5V @ 60% Duty Cycle/40º C
  • TIG Output Amps/Volts @ Rated Duty Cycle: 240V: 250A @ 60% Duty Cycle/40º C
  • Stick Amps/Volts @ Rated Duty Cycle: 240V: 200A @ 60%  Duty Cycle/ 40º C
  • Max Inrush ( I1MAX ) Amps: @240V: 44.9 A
  • Maximum Rated (I1EFF ) Input Amps: @240V: 23A
  • OCV: MIG:  74V - TIG:  74V - Stick:  74V
  • MIG Output Range: 240V: 30A-250A/15.5V-26.5V
  • TIG Output Range : DC: 10A-250A/AC:  15A-250A This unit is AC and DC capable (High Frequency or Lift Start operation)
  • Stick Output Range: 240V: 10A-200A
  • Variable MIG Inductance/Stick Arc Force Control: Yes
  • Spool Gun Capable: Yes
  • Pulse: Single
  • Pulse Frequency: No MIG Pulse, TIG Standard AC and DC Pulse and NEW! Advanced AC Pulse only:
  • Standard AC/DC TIG Pulse: .5-150Hz
  • Advanced TIG AC Pulse: .5-10 Hz
  • Pulse Time On: TIG: 5-95%
  • Pulse Volts: 3-95% of TIG Amps
  • Standard Drive Roll wire size: .030”-.045”
  • Separate wire feeder: No, self contained
  • Number of Drive rollers: 4
  • Max Wire Feed Speed: 240V: 60-600 IPM
  • Max Wire Roll Diameter: 12” (full size up to 44lb)
  • Memory: Yes
  • Upslope Time: TIG: 0- 10 Seconds MIG (Run-in):0-1 Seconds
  • Down Slope Time: TIG:  0-10 Seconds MIG (Crater Fill): 0-2 Seconds
  • Preflow time: 0-10Seconds
  • Post Flow Time: 0-10 Seconds
  • Flux Core: Yes, Optional
  • Air Carbon Arc: No
  • 2T/4T /Torch latch/Trigger: Yes
  • High Frequency Start and Lift TIG start in TIG Mode
  • Pulse TIG with AC and DC output for Aluminum, Steel, and Stainless
  • Advanced AC Pulse (mix of AC and DC-) improves high end penetration and low end handling
  • Advanced Squarewave, Soft Square Wave, Triangular and Sine Wave AC TIG for advanced Aluminum welding capability.
  • MIG with Inductance Control
  • Stick Arc force Control
  • Stick Hot Start Duration Control
  • Stick Hot Start Intensity Control
  • E6010 setting with hot start
  • Spot Time .5-15 Seconds
  • Stitch Time 0-15 Seconds
  • TIG AC Frequency 20-200Hz
  • TIG AC Balance 30-70% of EP
  • Burn Back Time 0-2 Seconds
  • Inductance/Arc Force 1-100%
  • All new Synergic Power Set Feature
  • 4.3" Digital 480 Resolution TFT Display
  • NEW! Power Set/Synergic Feature in all modes.



  • Weld up to a maximum of 1/2" Steel/Stainless single pass* (240V)
  • Weld up to a maximum of 3/4" Steel/Stainless multi-pass (240V)
  • Weld  a minimum of 24 gauge Steel/Stainless (120V, 240V)
  • Weld a maximum of 3/16" Steel/Stainless single pass* (120V) operation


* Single pass welds greater than 1/4" are not recommended as a sound welding technique in short circuit mode. To achieve max penetration on 240V, axial spray is necessary. Aluminum should always be welded in axial spray mode.

For Aluminum purchase the Parker DSP360 spool gun (and desired drive roll size) or purchase the .035"/.045" 2 pc U groove drive roll set along with a polymer liner for the stock 10ft gun.


  • Weld up to a maximum of 3/8" Aluminum single pass* (240V)
  • Weld up to a Maximum of 5/8" Aluminum  multi-pass (240V)
  • Weld down to a minimum of 14 Gauge Aluminum (120/240V)
  • Weld up to a maximum of 1/8" Aluminum single pass (120V)
  • Weld up to a maximum of 3/16" Aluminum multi-pass (120V)



  • Weld down to a minimum of .020" AC; .010" DC
  • Weld up to a maximum of 3/8"  AC; 1/2" DC single pass (240V)*
  • Weld up to a maximum of 1+" mult-pass (240V)
  • Weld up to a maximum of 10 ga. AC;  9 ga. single pass (120V)


*Welding greater than 1/4" thick in a single pass is not typically recommended for the best quality welds. Multi-pass welds are usually performed on metal 1/4" or thicker.  The reason for considering greater power on thicker metals is to more quickly overcome the heat dissapation rate of thicker metals so faster travel speeds and greater control can be obtained.


  • Weld with a maximum of 3/16" diameter electrode (240V)
  • Weld with a minimum of 1/16" diameter electrode (120V and 240V)
  • Weld with a maximum of 3/32 diameter electrode (120V)


* When considering welding with stick, it is more important to factor electrode capacity than welding thickness capacity due to multi-pass requirements of thicker metals.  Each electrode has a range of minimum and maximum thicknesses the electrode can weld, depending upon electrode manufacturer recommendations and formulations.


  • 4M Everlast 26 Series TIG torch with series 35  DINSE-style connector
  • 3M 36 Series MIG gun with Euro style quick connect fitting
  • Stick electrode holder with 10 ft. cable and 35 series DINSE-style connector
  • Work clamp with cable 3M cable and 35 series DINSE-style connector
  • Spare consumable starter kit (does not include tungsten)
  • NOVA Foot Pedal
  • Regulator
  • (Cooler and Cart NOT included)


  • Spool gun
  • Various size V-Groove Drive Rolls (Hard Wire)
  • Various size Flux Core Drive Rolls
  • Various size U-Groove Drive Rolls (Aluminum Wire)
  • NOVA Torch and Pedal Kit for LightningMTS 225
  • Power Cool 300 Water Cooler
  • Power Cart 250
  • Foot Pedal
  • Amp Control Slider
  • Welder Cover
  • NOVA Welding and Fabrication Table
  • NOVA Clamp and Tool Kit
  • Air-cooled 9/17/26 series TIG torches
  • Water-cooled 18/20 series TIG torches
  • Amp Control TIG torches
  • TIG Consumables Kits
  • Different MIG Guns
  • MIG Consumables Kits


NOTE: Use only with a generator rated by its manufacturer as "clean power" if using with a generator.  Consult manufacturer of generator for certification. Everlast does not approve or endorse generator brands or models, however, if the damage to the welder occurs from use with a generator not labeled as producing clean power by its manufacturer is not warrantable.  Typically clean power is represented as less than 5% THD.  Generator Requirement:  120V: 5500 Watts; 240V: 11,000 Watts MINIMUM. When using a generator, failure to use a generator rated as clean power voids warranty.


Appearance and type of accessories and consumables may vary from what is depicted.