Networks Europe Issue 19 January/February 2019 - Page 39

FUTURE-PROOFING how often is a UPS actually required? While it’s an essential safety net that all data centres need to have, a UPS can often be an expensive and underutilised asset sitting in the background. Embracing battery storage can transform this passive piece of kit into a proactive asset that’s working 24/7 for your data centre, reducing energy consumption, lowering energy bills, and even offering additional revenue streams. In an increasingly unpredictable and competitive world – dare we even mention the dreaded ‘B-word’ (Brexit)? –Why wouldn’t any data centre not want to capitalise on those advantages? Particularly if their fears about resilience are actually unfounded. Battery storage in action To participate in energy storage using a UPS, it’s advisable to use the more expensive lithium-ion (Li-ion) batteries rather than the more common sealed lead-acid (SLA). Although the cost of Li-ion cells has dropped by 79% since 2010 and is predicted to continue falling to around £50 per kWh by 2030. Compared to SLA, Li-ion also offers several performance advantages. It delivers the same power density in less than half the space and weight, meaning more can be installed in exactly the same footprint. It recharges much 39