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Jeep Project CJ-7

An ongoing Budgeted Rebuild/Build up of a Rock Crawling Machine.

Jeep Central
From Jeep History to Tech Specs and Projects.  This section is all about Jeeps.
Jeep Technical Info
Engine Swaps

Installing 23,000 Volt Offroad Lights

What are
HID Lights?

Onboard Air
Converting a York
AC Compressor
to Pump Air

Warn 9500i Winch Installation

HEI Ignition
Installation & Review

Jeep Dana 300 TeraLow - 4:1 Gearset for the Dana 300 Transfer Case




MOBI-ARC 200x Onboard Welder

The MOBI-ARC 200x is an on-board computer engineered to teach your alternator how to weld. It can connect to, and control, any alternator rated 200 amps or less. The stainless steel CAD package is designed with flexibility in mind. Ideal for customers who have a high-output alternator, or intend to use their stock alternator now, but likely to upgrade to a higher-output unit in the future.

When MOBI-ARC is fitted to any vehicle, the alternator is regulated by the pulse-width modulation (PWM) regulator built into the MOBI-ARC's circuitry. During daily driving, the alternator is regulated at an automotive-friendly 14.x volts (or 28.x volts on 24v vehicles). The current flows through the control unit via a solid-state MOSFET switch (sophisticated electronic solenoid) and passes to the vehicle's battery.

When welding is desired, the welding cables are inserted. Until an arc is struck, the alternator continues to charge the battery as normal. When the arc is struck, MOBI-ARC instantly breaks the connection between the alternator and the battery. This isolates and protects the vehicle's battery and electrical system. The alternator is then ramped-up to 38 volts open circuit which is optimum open circuit voltage for the welding process. (FIG B). Weld as long as necessary. If welding ceases for more than fifty seconds, the MOBI-ARC will automatically ramp the voltage back down to an automotive friendly 14.x volts and restore the connection to the battery.

Mobi-Arc Kits Consist of:
Mobi-Arc Control Unit
Mounting Bracket
Installation Manual
25mm Dinse Welding Plugs
Ground Clamp
Electrode Holder
All Wires & Cables Necessary for Installation
All Hardware Necessary for Installation


Dimensions: (W x H x D): 5.27" x 2.57" x 4.60"
Weight: 24 oz.
Packaging: Precision laser cut anodized aluminum front/rear, stainless steel covers, custom extruded aluminum chassis, silicon-bronze hardware, surface mount assembly (SMT) printed circuit board
Power produced: Direct Current (DC)
Welding Amperage: Alternator dependant, up to 200 amps
Duty Cycle: 100%
Open Circuit Voltage (OCV): 38 volts
Closed Circuit ARC-voltage: 18 to 28 volts
Battery Jumping: Programmable and Regulated
Switching Frequency
Pulse-width Modulation Regulation
High-side and Low-side switching compatible
12v and 24v Compatible (factory pre-set)

Mobi-Arc Control Unit:
Dimensions (W x H x D): 5.27” x 2.57” x 4.6”
Weight: 24 oz.
Pulse-Width Modulation Regulation
Solid-State Switch-mode technology
Automatic Mode Switching
Optional Mode-Select Modules
Fail-Safe Mode
LED Indicator Lights
Welding Cable Sockets
Thermal / Amperage Overload Protection
Water Proof / Dust Proof
Diagnostic Output Connection

The only alternator actuated welding control unit designed to meet or exceed Underwriters Laboratories (UL) guidelines

  • Laboratories (UL) guidelines
  • State-of-the-art MOSFET Architecture
  • Easy Installation Requiring little or no alternator modifications
  • Solid-State Switch-Mode Technology with No Moving Parts
  • Moisture / Dust Protection
  • Compact Package
  • No buttons, switches, dials, contactors, solenoids, or relays
  • Pulse-Width Modulation Regulation
  • Automatic Mode Switching between welding and charging
  • Four LED Indicator lights
  • Fail-Safe Mode
  • Thermal Overload Protection
  • Amperage Overload Protection
  • Accessory Expansion Port
  • Remote Diagnostic Output Port
  • 12 volt and 24 volt compatible
  • MIG, TIG, and Stick Capable w/ straight and reverse polarity
  • Control Unit can be Shared between Multiple Vehicles
  • Increases Battery Life by Regulating Voltage and Amperage
  • Discrete electrical architecture creates no broadband noise
  • Won't damage vehicles or void warranties

Mobi-Arc 200x Manufacturer- Site
Perfect Switch, LLC - Mobile Welding & Power,
A family owned and operated California Corporation dedicated to the design, manufacture, and distribution of innovative and industry-leading products.

Mobi-Arc 200x Onboard Welder Install
roverworx.com ... The folks at Mobi-Arc have done a fabulous job in designing and producing a cutting edge onboard welder.

Mobi-Arc 200x Onboard Welder Install Review
The Mobi-Arc is packed with features. You can get optional “Mode Select” modules that plug into the back of the Mobi-Arc and ...

Mobi-Arc Onboard Welder at OK4WD
Offroad Shop and Vendor selling the Mobi-Arc Onboard Welder at a great Price.

Mobi-Arc 200x. Onboard Welder
Install Review at n2jeepn.com

Mobi-Arc Install Review
Mobile Welding & Power, Inc. has just released there latest and greatest new mobile ARC welding system called the "MOBI-ARC".


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Miller Passport Plus Portable MIG Welder

Mobi-Arc 200x Onboard Welder

ZENA Mobile DC Welder

Premier Power Welder


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More Power Puller Hand Winch

Maasdam 4-Ton Pow'R-Pull Come Along

Bushranger X-Jack Exhaust Gas Vehicle Jack

Amsteel Blue Synthetic Winch Line

SlingMax Slings

ARB Snatch Block 9000



Holley Truck Avenger Carburetor

Optima RedTop Battery

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Pulstar Spark Plug -  Pulstar Spark Plug PR

FAST? Dual-Sync Distributors


Lift Kits

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JK Lift Kits - Skyjacker Jeep JK Lift Kits

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Jeep TJ Long Arm Suspension Lift Kits by Superlift

2008 Superlift Catalog Now Available!


MasterCraft Grab Handles

MasterCraft Performance Seats and Accessories for the Polaris RZR

Just Plain Cool Items

InstaCloth by Heininger Automotive

Air Intakes

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Edge Trail Jammer Performance Kit

Jeep JK K&N Air Intake


Cool Tools



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Kilby Dual Battery Tray

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Air Down

Staun Tire Deflators



GoPro HERO Digital Camera Systems - HERO Wide

Garmin Astro 220 GPS Dog Tracking System 


Offroad Lights

Lightforce Offroad Lights


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Powertrax No-Slip Traction System

Mattracks LiteFoot ATV/UTV Track System

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New Dynatrac Pro Rock 60 Axle Housing

NV4500 Manual Transmission

NV4500 Manual Transmission Exploded View

Klune V Extreme Underdrive

Klune-V 4-to-1 Under-Drives Now
Available With Ford 31-spline Input

OX Trax Locker

Tera Low 20 for the Dana 20

LoMax for the Dana 300

NP205 LoMax 3-to-1 Gear/Case Kit


Security and Storage

The Security Box

GunVault Firearm, Valuables Safe

Tuffy Security Consoles


Trailering - Towing

Hell Ya Hitch Helper

Tekonsha P3 Brake Controller


Tire Tech

Staun Internal BeadLock

Mud Terrain Reviews

All Terrain Reviews