Draper Storm Force® MMA Inverter Welder, 120A

Lightweight, Portable Inverter Welding from the Draper Storm Force® Range

The Draper INV120A/SF is a 120A MMA inverter welder from Draper's Storm Force® range — designed to deliver reliable, accessible stick welding performance in one of the most compact, portable packages available. Weighing just 3kg and supplied with a shoulder strap and all the essential accessories, this welder is ideal for users tackling light to medium welding tasks who want a capable machine that's genuinely easy to live with at home, on site, or in a small workshop.

Inverter Technology for a Smoother, More Stable Arc

Modern inverter technology is what makes a welder of this size and weight possible. Inverter welders replace the heavy transformers of older machines with compact, efficient electronics, delivering a more stable arc that's smoother, more controllable, and more consistent than traditional welders. For users who are still building their stick welding technique, that stability makes a real difference — it's easier to lay a clean bead and easier to achieve repeatable results.

Built-In Welding Aids for Easier Welds

The INV120A/SF is fitted with two key features that make striking and running an arc significantly easier:

Hot Start delivers a brief boost of current at the moment the arc strikes, helping the electrode ignite cleanly and consistently — particularly valuable on cold-start welds or when working with more demanding rods. Anti-Stick reduces current if the electrode does stick to the workpiece, helping to prevent it from glowing red and ruining the rod. Together, these features take much of the frustration out of stick welding, especially for users still developing their technique.

Adjustable 20–120A Amperage Range

The welder offers an adjustable amperage range of 20–120A, well-suited to light to medium welding tasks. The lower end of the range opens up thinner sheet work where heat control matters, while 120A at the top gives you the output needed for general repair and lighter fabrication. The duty cycle is rated at a useful 35% @ 120A, 60% @ 100A, and 100% @ 85A — giving you the flexibility to work at full output for shorter sessions or continuously at more moderate settings.

Genuinely Compact and Portable

At just 3kg and measuring 200 x 95 x 145mm, the INV120A/SF is small enough to carry comfortably with one hand or sling over a shoulder using the included strap. It fits easily into a tool bag, the back of a vehicle, or onto a shelf in a busy workshop — making it ideal for users who would otherwise be put off by the size and weight of larger welding machines. The shoulder strap is a particularly thoughtful inclusion, letting you carry the welder hands-free along with welding mask, electrodes, and other kit.

Standard 16A Plug Required — Easier Installation

The INV120A/SF requires a 16A plug (not supplied), making installation significantly more straightforward than higher-output welders that demand a 32A supply. A 16A circuit is widely available, easier to fit, and more practical for smaller workshops, home garages, and mobile work where access to a 32A supply may not always be guaranteed. Worth bearing in mind: the plug is not fitted as standard, so you'll need to add one as part of your setup.

All Essential Accessories Included

A genuine convenience of the INV120A/SF is that it comes with all the essential accessories needed to start welding, making it an attractive choice for first-time welder buyers who don't want to source leads, holders, and clamps separately. Combined with the shoulder strap, it's a kit that's ready to put to work straight out of the box.

Fan Cooling for Reliable Performance

Active fan cooling helps the welder shed heat during use, supporting consistent performance across welding sessions and protecting the internal components from heat-related stress over time.

Part of the Trusted Storm Force® Range

The INV120A/SF is part of Draper's Storm Force® range — a line dedicated to power tools and welding equipment built to perform reliably for the user who demands real working capability. Buying into Storm Force® means buying into a range built around delivering serious performance at a sensible price.

Key Features at a Glance

• 120A MMA inverter welder for stick welding
• Storm Force® range — Draper's performance-focused tier
• Adjustable amperage range: 20–120A
• Inverter technology for a smoother, more stable arc
• Hot start for clean, consistent arc ignition
• Anti-stick to protect electrodes if they stick to the workpiece
• Ultra-lightweight at just 3kg
• Compact 200 x 95 x 145mm footprint
• Shoulder strap included for hands-free carrying
• All essential welding accessories included
• Fan cooled for reliable operation
• Useful duty cycle: 35% @ 120A / 60% @ 100A / 100% @ 85A
• 230V power supply (16A plug required, not supplied)
• Suitable for light to medium welding tasks

Full Specification

Ideal Applications

The Draper INV120A/SF is a strong fit for first-time welder buyers setting up a home garage or workshop, light fabrication and repair work around the house, garden gates, fences, and metalwork projects, vehicle and trailer repair, hobby and craft welding projects, and occasional on-site welding tasks where portability matters most. The combination of adjustable amperage, included accessories, and a sensible 16A plug requirement makes it especially attractive for users who want a genuinely complete, ready-to-use welding solution without the complexity or supply demands of a heavier-duty machine.

Backed by the trusted Draper Tools name and Storm Force® range, the INV120A/SF brings approachable inverter performance, smart welding aids, and class-leading portability together in one well-equipped, ready-to-use package — a sensible choice for anyone looking to get started with stick welding or add a capable, easy-to-handle welder to their existing setup.