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  • Legrand's Award Winning KeorFLEX UPS Solution Continues Industry Recognition Streak

    Legrand has once again been recognised for its innovation and commitment to sustainability, winning the prestigious ‘Data Centre Sustainability Innovation of the Year’ award at the DCS Awards 2026, held in London on 14 May.

    The award celebrates the outstanding performance of Legrand’s industry-leading KeorFLEX UPS system, currently recognised as the most efficient UPS on the market, achieving an exceptional 98.6% efficiency in double-conversion mode. Designed for next-generation AI-ready data centres, the KeorFLEX combines high performance with industry-leading sustainability credentials.

    Key features of the award-winning system include:

    • Up to 98.6% efficiency in double-conversion mode
    • 85% certified recyclability
    • Support for multiple battery technologies and battery reuse
    • A scalable, modular architecture designed for long-term sustainability

    Engineered to help data centres reduce energy consumption while maintaining maximum reliability and performance, the KeorFLEX continues to set new benchmarks for sustainable power protection.

    This latest achievement adds to a growing list of accolades for the KeorFLEX range. Earlier this year, it also won the ‘Best Reuse or Recycling of Products, Energy, or Data Centre Infrastructure’ category at the Data Centre World Awards 2026.

    Since its launch, the KeorFLEX UPS has received multiple industry awards, further cementing its reputation as a game-changing solution for modern, energy-conscious data centres.

    Contact Power Control to find out more about how the most efficient UPS on the market can support your next data centre project - email [email protected] or call 01246 431 431 to speak to one of our technical team today. 

    Legrand's Award Winning KeorFLEX UPS Solution Continues Industry Recognition Streak
  • The controversial topic of sizing DC cables and DC isolation

    There is no doubting that DC isolation refers to the prevention of a direct current from transferring between two parts of a system whilst still enabling signal and power transfer. However, there is a lot of conflicting information about the methods of how this should be done.

    As stipulated in both the International Electrotechnical Commission (IEC) and the UK IET (BS 7671:2008), the Safe Extra-low voltage (SELV) of a direct current cannot exceed 120V DC. The guidance on how this is to be achieved is often interpreted differently. Some companies construe this to mean that the batteries must be separated to be under 120V (typically eight batteries) before deemed safe for an engineer to work on them. Naturally, the problem with batteries is that they are always live, so isolating them from a power source within a 3phase UPS system, which will typically use between 30 and 60 batteries, is not achievable.

    Whilst separating eight of the batteries is perhaps the safest method of DC isolation to comply with regulations, it is far from being cost effective. The batteries in each set of eight will require cabling back to a breaker, and then to the next battery in the string with the connecting links being added afterwards. In order to accommodate this, the DC isolators need to be much more complex. Connecting the end links on a battery string last, and the layout of the batteries in a cabinet or rack should make it very difficult to cause a short circuit in error, and therefore be in compliance with these Standards. Ensuring that all battery terminals have shrouds to prevent any exposed terminals is also required.

    Sizing a DC cable also causes conflicting opinions with companies forming their own interpretation of requirements.

    Power Control’s solutions director Rob Mather commented: “Following compliance guidance from the NICEIC, Power Control sizes the DC cable to the maximum requirement of a UPS in a worst case scenario. When using this approach the regulations also specify that the cables maximum temperature rating needs to be considered.”

    “In reality, the maximum demand from the UPS will only be in effect for a short period of time – most battery autonomies are designed at 10 minutes. The difference in current between a fully charged battery and a battery near full discharge can be 25%. In addition to this, the fact that a majority of UPS systems are never operated at full capacity makes it clear to see why some suppliers may take a risk and undersize DC cabling to be more competitive on price or to simply increase their margin.”

    DC breakers and fuse ratings are much of a likeness, both remove electrical power from an electrical circuit. For example, if a 200kVA UPS requires 400A DC isolation to match the maximum demand, the chances of the breaker or fuses tripping on overload are almost non-existent. This is because the battery voltage will have collapsed and therefore the inverter will have turned off long before the breaker or fuses will have tripped – typically they have 20% overload for 30 minutes. The only real protection is offered if the DC cable between the batteries and the UPS is damaged to create a direct short circuit (the UPS DC fuses will also fail) and this is essential protection. DC isolation will prevent the UPS from having an internal short circuit; however, by their very nature batteries cannot be isolated in this scenario and a battery short circuit may not be avoidable.

    When configuring a battery design that requires multiple strings, varying methods of achieving a required autonomy should also be considered. Such as, if there is a need for all of the batteries to be connected when a minimum autonomy of five minutes is desired then all battery strings will usually need to be connected at the same time. However, if a ten minute autonomy is needed the battery set may be configured in such a manner to allow one string to be isolated for maintenance purposes. This would mean a level of redundancy would be built in without too many extra costs.

    Rob Mather commented: “At Power Control we aim to allow for this in our battery configurations whenever possible to make ongoing O&M much more manageable in the event of any work needed on the batteries during the lifetime of the UPS. A UPS operating at a reduced battery autonomy is preferable to one operating with no effective autonomy.”

    The method used to isolate batteries on a multiple string system is dependent on the supplier. A lot of suppliers will have a main DC breaker or isolator and then individual string fusing, this is a perfectly acceptable method. The problem occurs further down the line when a single string needs isolating. The standard fuses are there for protection, not isolation when a voltage passes through them. Consequentially the whole battery set firstly needs isolating and then the fuses removing on the individual string before the rest of the batteries are reconnected.

    Rob Mather said: “I personally prefer individual string isolators to ease the maintenance process and allow any individual string to be isolated without affecting others. Where there is a concern of having to switch multiple isolators to remove electrical power from the batteries in an emergency situation, a DC breaker can be used with a shunt tip function and these can all be connected to a master emergency power off (EPO) switch.”

    For more information please email [email protected] or call the office on 01246 431431

    Alternatively, for information specifically on dc isolation and the sizing of a dc cable email Power Control’s solutions director [email protected]

    The controversial topic of sizing DC cables and DC isolation
  • Safe infrastructures depend on Power Control

    The UK’s power grid is in a very perilous position. Whilst delays in replacing the country’s ageing power store have been widely publicised, little attention has been given to the increase in power usage and the affects this is having on our available resources.

    Consumer dependence on data storage and an increase in inner city developments, where London has seen a 20 percent growth in the last year, are also very serious factors that are contributing heavily to the notable increase in power disturbances.

    Energy regulator Ofgem reported at the end of last year that the culmination of increased consumer consumption and lack of improvement seen in replacing ageing power resources would result in a mere two percent surplus by winter 2015. This surplus means greater susceptibility to fluctuations in power, therefore increasing risk to companies.

    These stark warnings have prompted a large rise in the re-evaluation of power protection policies. Whilst many companies already have strategies in place, either internally, externally or both, many of these are coming under strict review. What would have been suitable ten years ago is most likely to now be outdated and therefore a risk.

    To meet the demands for greater resilience, power protection policies are becoming increasingly sophisticated. Electrical design infrastructures have gained in complexity and critical back-up power equipment such as Uninterruptible Power Supply (UPS) systems are at their most advanced level yet.

    Many audits carried out by leading UPS specialist Power Control Ltd (PCL) on existing back-up power frameworks have highlighted that although many function adequately, the performance and resilience can be increased and where this is the case, businesses are opting to add an extra layer of protection.

    Working with leading contractors, PCL is able to meet the increasing demands for delivering complete project solutions that not only consider the critical power element but also the entire electrical strategy.

    One such company to recently extend its power protection strategy to support its business expansion is Vision Express Ltd. The fast growing company has recently built a new distribution centre works and lens crafting department in Nottingham. Any power fluctuations and breaks in power here could damage the company’s hi-tech lens equipment and conveyor belt system and result in £1000s of damage.

    In partnership with one of its preferred electrical contractors, PCL supplied, installed and commissioned a Borri B9000FXS within a matter of weeks. With a very short time frame to work within, precision planning was essential and both PCL and its electrical partner worked tirelessly to ensure the entire project and all electrical works were executed seamlessly.

    Another household name, which for contractual reasons cannot be named, has also improved its power protection landscape by replacing its end of life unit with the purchase of two Borri B8000FXS  UPS units, which are now handling added capacity at the global travel review company’s newest facility.

    Appointing an approved specialist contractor, PCL carried out a series of surveys to determine the load on the old UPS, which found that it had been operating at much less than its capacity. From this, PCL presented a resilient N+1 solution to fit within the area of the existing system and integrate with the existing electrical infrastructure.

    Chosen not only for its redundant solution but also its ability to deliver a complete turnkey package, PCL designed the installation to enable the new system to be deployed without having to lose power to the connected load.

    Commenting on PCL’s recent projects, the company’s managing director, Mark Trolley said: “The need for added levels of power protection has never been greater. The significant rise in power disturbances, which are being further augmented by the increase in dependence on data storage and continued infrastructure growth, have meant that many are assessing their existing business continuity strategies.

    “Findings have resulted in the requirement for added levels of protection; more sophisticated electrical infrastructures and improved back-up power technology.

    “Unlike other UPS companies, PCL prides itself on its unique expertise in electrical infrastructure, which encompasses every element of the critical power path. By looking at the total power protection strategy, PCL delivers maximum protection and significant efficiency and financial savings for businesses nationwide.”

    Formerly Borri Ltd, PCL rebranded in January 2015 to give the company greater opportunities to offer a wider pool of equipment, technical services and project solutions. This scope also further emphasises PCL’s commitment to delivering tailored power protection solutions for the UK and overseas markets.

    PCL continues to be committed to Borri three phase UPS products and technologies and remains an official UK distributor for the Italian UPS manufacturer. PCL continues to receive direct manufacturing and technical support from Borri Spa whilst maintaining its high level of engineering involvement, which is supported by its all encompassing service and maintenance programmes and high UPS and product, spares stock levels.

    For further company information please email [email protected] or call +44 (0)1246 431431

    For more information on our comprehensive maintenance plans email [email protected] or call 01246 431431. Alternatively, visit our UPS maintenance page

    Safe infrastructures depend on Power Control
  • Maximising battery efficiency in a UPS

    Whether a VRLA or Lithium Ion composition, batteries are the fundamental components of an Uninterruptible Power Supply (UPS) and so their failure could result in catastrophic consequences. It is therefore important to understand what can cause batteries to fail in order to take the necessary preventative measures to maximise their efficiency.

    One of the most common reasons of battery failure is poor storage. Especially of unused batteries as it is easy to forget that even idle batteries discharge small amounts of energy. If batteries are not charged regularly – once a quarter, the life of unused batteries can be significantly reduced and can ultimately lead to total battery failure.

    The temperature at which batteries are stored is also critical to their performance and lifespan. It is recommended that idle batteries are stored at a temperature of 50°F (10°C) or less. Typically the rated capacity of each battery is based on an ambient temperature of 68 – 77°F (20 – 25°C). The accepted rule of thumb is that for every 47°F (8.3°C) above the recommended ambient temperature, the expected life of a battery can be reduced by as much as 50%

    The life of a UPS battery can also be stunted due to over cycling. When there is a mains failure and batteries are called into action, they need to be recharged so are ready for future use. Constant or multiple mains failures can lead to early life failure. Each cycle and the duration of it effects the rated capacity of the UPS battery. Ultimately there are only so many cycles that a UPS battery can go through before it must be replaced.

    Ensuring the correct float voltage of a UPS battery is also critical to avoid failure. Undercharging (a low float voltage) can result in sulphate crystals forming, which harden and reduce the overall capacity of the battery.

    Conversely, overcharging (a high float voltage) can result in internal dryout – thermal runway from a build-up of hydrogen and oxygen gases. This not only results in battery failure but can also cause fire.

    The key to ensuring the UPS batteries are operating efficiently is to have regular servicing to prevent any irregularities resulting in a UPS failure.

    Our battery services page provides more information on the importance of battery maintenance and how Power Control carry out their servicing.

    For more information download the Advanced Battery Testing whitepaper or visit our Battery Servicing Page. Alternatively, email [email protected] or call the office on 01246 431431

    Maximising battery efficiency in a UPS
  • Don’t forget about UPS batteries

    The Covid-19 impact on businesses is unlikely to be clear for months, maybe years. Already we have seen countless companies forced to close with many others falling into administration. Whilst the outlook is a bit bleak, business owners must do everything they can to safeguard their holdings.

    One of the most forgotten assets are UPS systems. Found in most facilities, they are used to support all types electrical applications from IT, telecoms and EPOS systems through to emergency lighting, door entry systems and critical equipment for medical and blue light establishments. Whether the systems are small desktop UPS or large three phase solutions, they all have a value and cannot be left idle.

    UPS systems of 6kVA and above should have a technical condition report carried out before decommissioning if the UPS is to be unused for a prolonged amount of time. Likewise, a make safe service is also recommended for situations where the load to a UPS will be significantly reduced. In both cases businesses may want to consider the safe removal of UPS batteries, which are extremely hazardous and if left in unsuitable conditions could result in significant damage and even the risk of fire.

    Hundreds of UK businesses are fighting for survival doing whatever they can. Difficult decisions will need to be made, with many downsizing to try and cut costs. In these circumstances Power Control can offer a full decommission and relocation service. For those selling a premises on, condition and make safe reports from Power Control can help add value to the business.

    The condition and make safe reports will confirm the current performance of systems, outline the existing environment and give detailed guidance on best practice. Power Control has provided emergency power for businesses of all sizes for nearly 30 years and is trusted by leading institutions across the country. The company’s nationwide team of engineers deliver all regular servicing and maintenance works, following strict site restrictions and out of hours protocols.

    At present, Power Control understands that organisations are resistant to allowing engineers on site but the company has taken all the necessary safety precautions and is strictly following Government guidelines to be able to continue to carry out these essential UPS works.

    Power Control works with businesses across the country and supplies, installs, commissions and maintains backup power solutions for all applications. For more information please visit www.powercontrol.co.uk, email [email protected] or call the office on 01246 431431

    Don’t forget about UPS batteries
  • The importance of UPS components

    The role of an Uninterruptible Power Supply (UPS) is essential but is surprisingly often overlooked and consigned to being recognised as a mere battery system. UPS solutions are in fact multifaceted devices, made up of a multitude of critical components. It is the quality of these components that ensure that UPS systems can effectively deliver several functions; from safeguarding against power surges, sags, spikes and brownouts through to ensuring a reliable and continuous source of clean power.

    From the exterior, all UPS systems look much of muchness. Often a black chassis, with a LCD screen and several different ports at the rear. Thankfully UPS solutions are not purchased based on their external aesthetics but chosen for their technological advantages. The supreme reliability of a UPS system, comes down to the quality of components and the diligence of the user to ensure that the equipment is properly maintained.

    Component quality within UPS solutions cannot be compromised. Cutting corners and opting for cheaper parts can have devastating consequences. Understanding the specific role that each component plays in the overall performance of the UPS unit can also prevent catastrophic failures.

    THE BATTERY

    Starting with the most obvious, the battery – this is the core of any UPS system and is what controls UPS reliability. Despite this, it might be alarming to learn that poor battery maintenance results in over 20% of UPS failures. A typical lead acid (VLRA) UPS battery has a typical lifespan of five to ten years. The longevity of batteries can be determined by a number of factors, the most significant being the environment in which they are kept in. It is also important to note that a single battery fault can affect an entire battery string.

    THE RECTIFIER

    Another core component is the rectifier, which not only charges the batteries but also converts utility power from AC to DC. The quality of this element should be of the highest grade and regular servicing is recommended to ensure that the rectifier has not corroded or dried out. The same practice applies to inverters.

    THE CAPACITOR BANKS

    The final area to address are the capacitor banks, which comprise of fans and multiple capacitors of differing types and sizes. The smaller capacitors smooth out the power supplied to the UPS processor and the larger ones regulate the power flow into the equipment being protected.

    Precisely designed and expertly manufactured capacitors will only show very gradual changes over time and frequent servicing will prevent any unplanned failures. However, the perishables within capacitors degrade at the normal rate for each material and so a preventative maintenance approach is paramount to maintaining healthy UPS components.

    As an independent leading power protection specialist, Power Control Ltd has aligned itself with international manufacturing partners, which are all renowned for superior component engineering. The business prides itself on its influential role within the emergency power sphere and invests a great deal of resource in being as close to its manufacturing partners as possible.

    For more information email [email protected] or call the office on 01246 431431

    The importance of UPS components
  • Complacency will cost – UPS maintenance and service remains essential

    Now is not the time to be complacent. Especially when it comes to the performance and security of our infrastructures.  

    For most businesses in the UK, March 2020 will have been a complete blur, where the focus would have been on survival. Those fortunate enough, quickly introduced home working for as many employees as feasible. These remote set ups are now well established and as the country heads into its next wave of lockdown, these practices have fast become the present ‘norm’.  

    Panic is being replaced with acceptance and Power Control Ltd has seen a notable shift from reactive, impulsive behaviour to more considered and proactive attitudes. Business continuity is firmly a top priority and it is essential that physical resilience is recognised at ground level. 

    It is therefore vital that organisations are aware of power supply and the quality of source. Reports have shown that due to business closures, and many manufacturing sites temporarily on stop, there has been a drop in power consumption. The national grid has taken on a very different output landscape; where there is a more constant supply spread across significantly more individual users.  

    This will undoubtedly have repercussions when the lockdown restrictions are lifted. The grid is likely to feel the strain as the nation gets back to full operational capacity. Power spikes, sags surges and total power failures are expected. Businesses must be prepared for this. Simple measures cannot be forgotten and ensuring power protection strategies are followed through could prove to be invaluable.  

    Many of these essential procedures begin with preventative maintenance to check critical equipment, such as UPS systems. If the national grid does falter, having a UPS could be the difference between being operational and survival and, in the worst case, total closure. After weeks of not being able to operate, the last thing any business would want is further downtime and lost revenue due to a power failure, which could have been prevented.  

    Backup power solutions, UPS, are designed to deliver a continuous supply of power and protect critical equipment. Any failure that could be avoided is intolerable. Power Control is urging businesses to review their power protection strategies and have routine UPS checks carried out as soon as it is reasonably safe to do so. Companies cannot afford to be idle; preventative UPS maintenance and total adherence to established power protection policies is an absolute necessity to ensure business continuity.  

    Having UPS systems serviced and maintained by authorised partners is vital to ensuring that product warranties remain valid. Power Control is the exclusive UPS service partner for Borri Spa, Huawei, Legrand and CertaUPS. All of its engineers are factory trained and availbale 24/7 for any UPS servicing and maintenance.

    Power Control Ltd works with businesses across the country and supplies, installs, commissions and maintains backup power solutions for all applications. For more information please email [email protected] or call the office on 01246 431431  

     #ignoranceisnotbliss 

    Complacency will cost – UPS maintenance and service remains essential
  • Not a complete shutdown

    UPS systems (Uninterruptible Power Supply) are often the forgotten piece of equipment. Despite being central to business continuity, once a UPS is installed, it is almost too easy to overlook it. Having seen this happen too many times, Power Control Ltd wants to remind businesses that whilst a facility may be shutdown, the UPS has not.  

    In fact, in many circumstances, a backup power solution, UPS may be supporting a central server, should this fail, any remote working would suffer, leading to even more downtime and lost revenue. Something businesses can ill afford.  

    With so many organisations on a hiatus and with many others being forced to close, it is hoped that consideration is being given to the UPS system that is running 24/7. Owners of all business sizes need to be mindful of the very critical role that backup power solutions play and the essential need for them to still be maintained.  

    All key UPS components require servicing, from the UPS batteries through to capacitors, fans and bypass panels. Maintenance is not optional, it is crucial. Another fundamental factor that cannot be forgotten is the environment in which the UPS solution is situated. Backup power systems need to be housed in well ventilated rooms to ensure that the batteries do not overheat, which could cause swelling, leaks and ultimately failure of the UPS. The atmosphere needs to be clean to safeguard against any dust and other foreign particles disturbing the UPS mechanisms.  

    The government’s advice for social distancing has deterred people from carrying out routine UPS maintenance but this could have damaging operational and financial consequences. Power Control would like to reassure its clients that its engineers are taking all necessary safety precautions and strongly advises that any scheduled UPS servicing is undertaken where it is reasonable to do so.  

    Power Control has its own team of nationwide engineers, trained across all UPS brand and able to provide complete service and maintenance for these and ancillaries including batteries and electrical installations. The company works with organisations across the country and supplies, installs, commissions and maintains backup power solutions for all applications. For more information please visit www.powercontrol.co.uk, email [email protected] or call the office on 01246 431431  

    Not a complete shutdown
  • Major power cuts across England, who is accountable?

    On Friday 9th August the UK power grid failed. Nationwide power cuts were reported, affecting over one million people.


    The immediate aftermath saw hours of news coverage and over 13k Tweets all reporting on the direct disruption, with endless references to delayed/cancelled train services, traffic congestion and of course a fair share of political antagonising. When caught up in the moment it is difficult to consider the other repercussions of such widespread downtime but ironically these will have the longest lasting effect.

    Businesses across the country were grounded to a halt but at what cost? Those without any backup power provision have been left with catastrophic losses amounting to substantial financial losses in lost data and downtime. Can anyone be held accountable for these forfeitures? The National Grid reported that the power failure had been caused by “issues” from two generators, which suggests that there are some fragilities that need addressing – ASAP.

    A disruption of this scale cannot be swept under the carpet, it is not reasonable for organisations to be expected to absorb the losses and manage the practical consequences of an outage of this scale because of the questionable state of the National Grid infrastructure. With electricity consumption increasing due to the rise of smart devices and electric vehicles to name a few, it is entirely possible events such as this will not be one-offs. As a consequence, we implore organisations to seriously review their power protection provision.

    Firstly, is anything in place? If not why not? Installing a basic Uninterruptible Power Supply (UPS) system on IT equipment will give a business enough time to safely shutdown and save any critical data. More sophisticated UPS solutions will enable infrastructures to operate until the power can be restored.

    If a backup power supply is already in place, is it fit for purpose? Is it still effective? When was the provision last serviced? We predict that hundreds of businesses were let down because their backup failed and the most common reason for this will be the user overlooking the need for regular maintenance.

    Our message is simple, business owners need to take control of their power infrastructures. They must have a backup power strategy in place to safeguard their business revenue and a UPS solution is the most practical place to start.

    Don’t wait for the dark.

    For more information about Power Control’s project management service and our product range, please email [email protected] or call the office on 01246 431431.

    Major power cuts across England, who is accountable?
  • 60% of data centre outages could have been avoided

    One of the biggest concerns faced by data centre owners is unplanned downtime. Findings from the Ninth Annual Uptime Institute Data Centre Survey highlighted that power loss was still causing significant problems within the industry.

    Of the 1600 operators and IT practitioners surveyed, power loss was found to account for a third of all outages, causing significant financial consequences. Particularly concerning is the knowledge that this figure mapped very closely to the results set out in the 2018 survey showing very little has been done to reduce this statistic.

    Interestingly, 60% of respondents believed that with a better management strategy or process configuration in place, these outages could have been avoided. So why isn’t this being addressed?

    Understandably, data centre outages are complex, with affected services spanning across multiple systems. However, it is all too common to see data centre managers become complacent, only counting the costs of failure once it occurred and not implementing personnel training, operational processes and management strategies to mitigate an initial failure.

    An uninterruptible power supply is critical in any data centre’s management strategy and a careful understanding of future demands is just as important as analysing day one usage. Thought and planning must be given to ensure the UPS system can grow and adapt as the data centre matures and changes.

    Modular data centre technology is becoming ever more popular for this very reason. Their flexibility and scalability allow the operator to install only what is needed, mitigating the need to oversize a UPS and reducing initial space and costs.

    Fully expandable, these one stop-equipment solutions are simple, efficient and reliable. They not only offer a very practical solution to addressing the growing need to protect against downtime but they also provide greater TCO clarity.

    To ensure long term, optimum performance from an uninterruptible power supply, a proactive maintenance contract should be in place. Even though UPS technology has moved towards digital processors (DSP), extraneous variables an affect the performance. Firmware updates are also crucial for ensuring the UPS system is working at peak performance and could impact the longevity.

    Huawei and Legrand offer intelligent modular solutions, both ideal for a plethora of applications and can be configured to provide redundancy for all tiers of data centre.

    For more information email [email protected] or call the office on 01246 431431

    60% of data centre outages could have been avoided