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Uninterruptible power supply by yorpower

Tried, Tested & Trusted

Our expert UPS engineering team provide site surveys, installation and commissioning services, UPS and battery load bank testing, UPS end-user product training and UPS after sales service and maintenance contracts. Right from the outset, through to the final stages of your new UPS installation, YorPower will seamlessly manage your install every step of the way. And with over Sixty Years of Diesel Generator experience behind us, YorPower also provide cost effective and competitively priced standby diesel generator solutions – there is genuinely no need to look elsewhere!

YorPower offer comprehensive, competitive and tailored UPS maintenance packages offering peace of mind and designed to meet your budget. Our specialist and very experienced service team maintain and service most UPS brands including Riello, Uniti, BORRI and APC.

Not happy with your existing UPS system or UPS service provider?

We are here to help you get it right first time! Contact YorPower today on 0345 200 9888 to discuss your UPS and critical power requirements with a member of our professional sales team.

Our industry leading UPS maintenance packages include:

  • 24 hour cover – 365 days a year.
  • Environmental checks.
  • Electro-mechanical checks.
  • UPS functional testing.
  • Battery Assessment.
  • Provision of service sheets and documentation.
  • Recommendations for remedial work.
  • Advice to improve current system setups.

At YorPower we believe it’s essential to provide a wide range of UPS maintenance packages, all of which can be tailored to your specific requirements. Our factory trained engineers are available 24 hours a day, 7 days a week. Whether you require a ‘next day’ service or specified response time, YorPower can provide the maintenance support to suit your business needs.


UPS backup batteries are the heart of an uninterruptible power supply. The UPS battery provides any UPS system set up with the power to support your infrastructure in the event of a mains power cut. A poorly maintained UPS battery or a legacy UPS system that does not function as efficiently as it should, could affect the autonomy of your UPS and the full uninterruptible power supply network, resulting in significant disruption in the event of a mains outage. YorPower offer UPS backup for single phase and three phase applications, both of which can operate in synch with an existing site generator or a new diesel generator of our supply. Our UPS battery systems can be matched to your exact needs depending on your investment preferences, the length of battery autonomy in the event of a loss of supply and your preferred design.


UPS systems need to be regularly tested to ensure they operate as designed so that in the event of a power cut there is complete confidence in the infrastructure. Load bank testing provides vital information on a battery’s life (autonomy) when the test is complete as well as the integrity of all electrical wiring and interconnections. The UPS Load Bank test is carried out when the uninterruptible power supply (UPS) is having to cope with real ‘site load’ conditions to establish whether the batteries are functioning at optimal level or in fact whether the batteries are nearing the end of their working life. The full UPS system receives a thorough work out from, application of load, running whilst on load, sudden removal of load to mains restored.

UPS testing involves placing a resistive load bank no more than 20 meters from the UPS or PDU terminals. A resistive load bank will simulate genuine every day loads which are common place in the working environment, which include; lighting and heating.

On completion of the load bank test, a full system performance diagnostic is recorded and measured during discharge. The test is vital for highlighting potential problems with UPS system or backup generators which may prompt a specific cause of action to prevent a possible weakness or failure in the system


UPS Impedance testing is a way of checking the internal resistance to establish which are the weakest cells or possibly abnormal cells. A specified electrical current is passed through each battery in a specific order to decode the internal impedance resistance of each battery.

As a battery gets older its level of impedance increases, conversely, a lower internal resistance generally indicates a higher capacity. Any increase in impedance that cannot easily be explained could indicate the battery capacity is declining and could possibly require replacing.