Keeping the Lights On: Why Reliable Power Really Matters in the Pharmaceutical World
In recent years, there’s been a quiet but significant shift in how building designers and facilities managers approach the critical task of powering emergency evacuation lifts. Where diesel generators once dominated this space, EN50171 compliant uninterruptible power supply (UPS) systems are now rapidly becoming the preferred solution… and for good reason.
At the heart of this change is a deeper understanding of what truly matters in an emergency: reliability, immediacy, safety, and sustainability.
Instantaneous response when seconds matter
Evacuation lifts play a vital role in ensuring that people with reduced mobility can exit multi-storey buildings quickly and safely. In the event of a fire or power failure, every second counts. Unlike diesel generators, which typically require a start-up time of 15–30 seconds before they can deliver full power, EN50171 compliant UPS systems deliver power instantaneously. This seamless transition ensures that evacuation lifts remain operational the moment mains power fails without delay, flicker, or risk of lift stoppage mid-journey.
Certified reliability and safety
EN50171 is a European standard specifically governing central power supply systems that must guarantee power continuity to safety equipment, including evacuation lifts, emergency lighting, fire alarm systems, and smoke extractors. UPS systems built to this standard are designed to withstand the harsh conditions that can accompany a fire scenario, such as high ambient temperatures and prolonged operation under full load. This compliance gives designers, insurers, and building owners confidence that these systems will perform exactly as required when lives are at stake.
Space, noise, and air quality advantages
Diesel generators, by their nature, are large, noisy, and require dedicated plant rooms with ventilation for exhaust fumes. They can also contribute to local air pollution, which is increasingly incompatible with the net-zero commitments many organisations have made.
EN50171 UPS systems are typically far smaller, operate silently, and do not produce emissions at the point of use. This not only frees up valuable building space but also aligns with the push towards greener, more sustainable building design.
Lower operational complexity and maintenance
Generators require regular testing, refuelling, and servicing to remain reliable; tasks that come with cost, complexity, and risk. Fuel must be stored safely, and its quality monitored over time.
By contrast, EN50171 UPS systems generally demand less intrusive maintenance and eliminate fuel storage risks altogether. Modern battery technologies further enhance system lifespan and reduce maintenance frequency, making UPS solutions more predictable and cost-effective over the long term.
Integration with modern building systems
As buildings become smarter and more connected, the digital capabilities of UPS systems bring another advantage. Advanced monitoring, remote diagnostics, and integration with building management systems allow facility teams to track battery health, predict issues, and ensure compliance far more easily than with a mechanical generator set.
A better fit for modern building needs
Ultimately, the rise of EN50171 compliant UPS systems over diesel generators reflects a broader evolution in building safety philosophy: from simply having a backup power source, to ensuring an unbroken, certified, and environmentally responsible supply to life safety systems.
As more building owners, specifiers, and regulators recognise these benefits, it’s clear why EN50171 UPS solutions are no longer the niche choice but fast becoming the new standard, helping to make our built environment safer, smarter, and more sustainable for everyone.