Custom UPS Manufacturers & UPS Suppliers

We are a leading manufacturer and provider of STANDARD (COTS), RUGGED, and CUSTOM Uninterruptible Power Supplies to meet with our customers specific requirements.
Please use the Products or Application Tabs above to review our full product offerings.

A full range of AC UPS suitable for Commercial / Marine / Industrial UPS Applications & Defence applications.

Utilising COTS product Harland Simon UPS can manufacture power solutions to meet with a higher operating temperature, higher vibration, higher level of EMC or higher Ingress Protection.

As a specialist Custom UPS manufacturer, we have the team of experts to design and manufacture a Power Solution to meet with your specification, and where a standard UPS will not be suitable. At our Milton Keynes facility, we have manufactured and have UPS products that meet MIL STD/DEF STAN, various Marine standards (DNV/Lloyds).

Market Sectors

Alternative Power UPSCommercial UPS Military / Defence UPS Harland ProtectUPS Industrial UPS Marine UPSPower UPSPublic Sector UPS Transport UPS CNI Security Water UPS

News & Events

  • Eaton 9130 End Of Life Notification


  • Harland Simon to supply UPS to Servowatch for IPMS critical back up power protection


    Servowatch, a leading supplier of advanced integrated ship control systems, has been selected by Hyundai Heavy Industries (HHI) in South Korea to supply its Integrated Platform Management System (IPMS).

  • A UPS does so much more......


    An Uninterruptible Power Supply is so much more than just a battery in a box, providing some back-up when there is a power failure, this is just the tip of the iceberg! This is an obvious feature, but is very important as critical loads must be supported at all times with UPS/Battery Packs and Generators, even in total blackout situations.

  • Marine & Industrial UPS 2018


    View our range of rugged, marine industrial ups for guaranteed 24/7 power protection for safety and cruising related systems on board. As a UPS manufacturer, our custom solutions integrate a reliable and proven Eaton UPS power module into an environmentally protected IP enclosure.



    The IP54 integrated system offers comprehensive power protection and battery backup for a range of industrial marine based applications. They can be deployed in critical IT equipment, thrusters, drilling drives, dynamic positioning, control and monitoring, communications, gas and fire detection, emergency lighting and onboard security equipment, etc.

Case Studies

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