EMSc (UK) Ltd, Energy Management Systems, SheffieldEMSc (UK) Ltd are designers and manufacturers of the Star Range ® of energy saving solutions, which includes the flagship Powerstar voltage optimisation system.

The Star Range ® of technologies are commercial solutions engineered to reduce a buildings energy consumption and save on electricity costs whilst lowering impact on the environment.

EMSc (UK) Ltd also design and manufacture the VO4 voltage optimisation solution, designed for use in residential and small business applications.

EMSc (UK) Ltd head office is located in Sheffield, UK and is supported by both regional office locations in Australia and Cyprus and a network of global distributors in over 15 countries.



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Call: 0114 257 6200

Email: info@ems-uk.org

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Our Brands & Innovations

The six award winning, energy saving technologies within the Star® range portfolio are Powerstar, Hotelstar, Airstar, Lightstar, Autostar and Motorstar. EMSc (UK) Ltd also offer the smaller commercial and domestic range of voltage optimisation systems VO4HOME. Whatever the business, our cutting edge range of technologies offers the perfect solution for making organisations more energy efficient,  with an impressive range of applications, and potential savings of up to 75% in energy consumption and costs

Brands & Innovation Powerstar Voltage Optimisation   Star Range

Dedication to UK Manufacturing


EMSc (UK) Ltd are firmly behind the notion that British manufactured and engineered products represent a pivotal component in the developing UK economy, and internationally symbolise a quality reassurance synonymous with UK manufactured solutions. It is dedication to this that has ensured EMSc (UK) Ltd have continued to fully design and manufacture all solutions entirely in the UK for over 13 years.

UK Manufacturing  Our Products  Client Testimonials

Corporate Social Responsibility

web versionAs a company with significant experience in supplying sustainable solutions and one who holds social, economic and environmental concerns at its heart, EMSc (UK) Ltd make a concerted effort to ensure that it minimises its own impact on the environment through policies, procedures, and working practices.




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