About us


QES Limited was established in 1990 as a high quality repair and engineering services business that specialises in electronic power conversion equipment (Power Supplies). Twenty one years later these Quality Electronic Services are well known across a wide range of customers and markets globally.

All of the services provided are covered under our Quality and Environmental management systems which are certified to ISO9001:2015.

QES is the company for anything relating to power supplies. If you need Custom Designed product, off the shelf repacements for older units, or a power supply for a new application then contact us and we will be more than happy to help.

Repairs are what we are renowned for. We repair any power supply made by anyone anywhere around the world. We deal with product from all over Europe for repair in our UK workshop. Our reputation for doing a quality job at the right price.

Take a look at our web site for more information or give us a call to discuss what your requirement are or get a price.


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  • Unit 4, Chells Enterprise Village
  • Chells Way
  • Stevenage
  • Hertfordshire
  • SG2 0LQ

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