Company Information

Powerstar  is an engineering market leader, renowned for the innovative design of commercial energy storage and voltage optimisation systems.
Along with these commercial solutions – which have been installed into organisations throughout an an array of industries worldwide – the companies fixed range of voltage optimisation technology has also been adapted into single phase and small three phase solutions for use by homes and small businesses.

For more information on the company, its heritage and the full range of energy management technologies in the Powerstar portfolio visit the Powerstar website.

Company Profile


  • Established company, recognised as a market leader in voltage optimisation
  • At the forefront of technological advances in energy management
  • NICEIC approved contractor
  • Holders of the Made in Sheffield mark of manufacturing excellence
  • We sell nationwide and distribute overseas to over 20 countries
  • L.J.H Energy Zone are the official VO4 distributor in Cyprus – Visit website
  • We source all components locally wherever possible
  • Systems are designed, engineered and built in the UK under BS171 IEC60076
  • Manufactured in line with ISO9001 therefore all components are traceable
  • Systems comply with all current electrical regulations


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