The Benefits of Power Factor Correction (PFC) in Welding
    For professional welders and small workshop owners, understanding Power Factor Correction* (PFC) in welding equipment is crucial for optimizing operations and adapting to various working conditions. PFC technology offers significant benefits in welding performance, operational flexibility, and regulatory compliance.

    Understanding PFC

    PFC technology improves how welding equipment utilizes electrical power from the grid. It corrects the phase shift between voltage and current, optimizing the power draw from the electrical supply. Click to learn more about the fundamentals of PFC.

    PFC welders typically achieve a power factor* of 0.95 or higher, compared to 0.4 to 0.6 for non-PFC models.Watch our short video to understand the concept in seconds.

    Key Advantages of PFC Welders

    1.Enhanced Welding Performance
    • Provides a more stable arc, potentially resulting in smoother welds.
    • Improves control in pulsed welding applications.
    • May reduce spatter, potentially minimizing post-weld cleanup time.

    2.High Adaptability
    • Operates effectively across a wide input voltage range (typically 95V to 265V).
    • Maintains more consistent performance despite voltage fluctuations.
    • Compatible with generators, ideal for remote or mobile welding operations.
    • Less sensitive to long extension cord use compared to non-PFC welders.

    3.Regulatory Compliance
    • Meets energy efficiency standards such as EU2019/1784
    • More likely to comply with local power quality regulations.

    Practical Implications for Workshops

    1.Electrical System Benefits
    • May allow use of smaller circuit breakers or fuses, potentially simplifying electrical setups.
    • Reduces impact on local grid, crucial in areas with weaker power infrastructure.
    • Minimizes harmonic distortion* in the power supply, potentially benefiting other sensitive equipment.

    2.Operational Flexibility
    • Enables use of longer extension cords without significant power loss, increasing workspace flexibility.
    • Suitable for use in various environments, including areas with unstable power supplies.
    • Beneficial for small workshops in mixed-use or residential zones, subject to local regulations.

    3.Cost Considerations:
    • Initial investment: PFC welders typically have a higher upfront cost compared to non-PFC models.
    • Infrastructure savings: Lower current requirements may allow for reduced electrical infrastructure costs in new workshop setups.
    • Maintenance: Potentially lower maintenance costs due to reduced stress on electrical components.


    Power Factor Correction (PFC) technology offers substantial benefits for professional welders and small workshop owners. PFC welders deliver enhanced performance with a stable arc and better control, adapt to varying voltage conditions, and comply with energy efficiency standards. They simplify electrical setups, reduce grid strain, and minimize harmonic distortion. While the initial cost is higher, the long-term savings in operational, infrastructure, and maintenance costs make PFC welders a worthwhile investment.

    Key Terms

    *Power Factor Correction (PFC): A technique used to increase the power factor of an electrical system, improving efficiency by minimizing reactive power consumption.
    *Power factor(PF): The ratio of real power to apparent power in an electrical system, indicating how efficiently electrical power is being used.
    *Apparent Power (S): The total power supplied by an electrical system, measured in volt-amperes (VA).
    *Real Power (P): The actual power consumed to perform work in an electrical system, measured in watts (W).
    *Harmonic Distortion: The presence of unwanted frequencies in the power system, often caused by non-linear loads.

    For Specific Product Information

    For those interested in exploring PFC welding equipment options, JASIC offers high-quality PFC welders for MMA, MIG, and TIG applications, combining efficiency, stability, and user-friendly design.

    To find the best fit for your specific needs or to get more detailed information about PFC welders, browse our EVO20 product page or contact JASIC sales at