Inverter Welders

About Inverter Welders

Inverter welders represent the latest generation of welding technology, combining professional-grade performance with exceptional portability. Unlike traditional transformer-based machines, inverter technology converts 240v mains electricity into high-frequency current, resulting in units that are significantly lighter, more energy-efficient, and deliver superior arc stability. MyToolShed.co.uk stocks a comprehensive range from trusted brands including Sealey and Draper, with models suitable for workshop environments, site work, and mobile fabrication tasks.

The collection includes MMA (stick) inverter welders, MIG inverter units, and versatile multi-process machines capable of TIG welding. Available in amperage ratings from 120A through to 200A, these welders handle everything from light-duty repairs to heavy fabrication projects. Many models offer multi-process capabilities, allowing tradespeople to switch between welding modes with a single machine, whilst their reduced weight—often under 10kg—makes them genuinely portable for mobile welding services.

Applications

Inverter welders serve diverse users across professional and DIY applications:

• Fabricators and welders: Workshop steel fabrication, custom metalwork, and structural welding services
• Agricultural engineers: Farm machinery repairs, gate fabrication, and equipment maintenance
• Automotive technicians: Body repairs, exhaust work, and chassis modifications in garages and restoration workshops
• Plant fitters: On-site repairs for construction equipment and industrial installations
• Maintenance engineers: Manufacturing facilities requiring regular repair and fabrication work
• Mobile welding services: Lightweight, portable units ideal for call-out services
• Construction contractors: Structural steelwork, railings, security grilles, and site-based fabrication
• DIY enthusiasts: Home workshop projects, garden furniture, classic car restoration, and artistic metalwork

Choosing The Right Inverter Welders

Amperage Rating: Consider typical material thickness. 120-140A units handle materials up to 6mm thick, suitable for light fabrication. For work up to 10mm, choose 160-180A models. Professional fabricators working with thicker materials should consider 200A units offering greater capacity and improved duty cycles.

Welding Process Requirements: Single-process MMA inverters offer excellent value for stick welding only. Multi-process machines providing MIG, TIG, and MMA capabilities deliver maximum flexibility for workshops handling diverse fabrication tasks. Consider whether gasless MIG capability is needed for outdoor work.

Duty Cycle: Professional users should prioritise machines with 60% or higher duty cycles at typical working amperage, ensuring the welder won't overheat during extended sessions. Occasional users can manage with lower duty cycles (20-40%) as natural breaks provide sufficient cooling time.

Portability and Features: For site work, weight becomes crucial—most inverter welders at MyToolShed.co.uk range from 5-15kg. Digital displays provide precise amperage control, whilst hot start, anti-stick, and arc force functions significantly improve usability, particularly for less experienced welders.

Safety Information

All inverter welders must connect to properly earthed 240v supplies compliant with BS 7671 wiring regulations. Use RCD protection, particularly for site work or damp conditions. Always wear appropriate PPE including welding helmet with suitable shade rating (typically shade 10-13), heat-resistant gauntlets, leather apron, and safety boots. Ensure adequate ventilation or fume extraction equipment—COSHH regulations require proper control of welding fumes. Remove flammable materials from the work area, keep fire extinguishers accessible, and screen welding areas to protect others from arc flash.

Frequently Asked Questions

Can I run an inverter welder from a domestic 13A plug socket?

Many smaller inverter welders (120-140A models) can operate from standard 13A sockets, though performance may be limited at maximum output. Larger machines typically require 16A or 32A supplies via appropriate industrial connectors. Always check the welder's input current requirements and ensure your electrical installation is adequate to avoid tripping breakers.

What amperage do I need for general fabrication work?

For most general fabrication involving mild steel up to 6-8mm thick, a 160A inverter welder provides excellent versatility. Professional fabricators working with thicker materials (up to 10mm) should consider 180-200A models. Occasional users and DIY enthusiasts will find 120-140A units sufficient for typical projects like garden furniture and home repairs.

What's the difference between inverter and traditional transformer welders?

Inverter welders use modern electronic circuitry to convert 240v mains electricity at high frequency, making them significantly lighter (often 70% lighter), more energy-efficient, and more portable than traditional transformer welders. They provide superior arc stability, more precise control, and additional features like hot start and anti-stick technology.