Uninterruptable power supply (UPS) batteries are useful means of ensuring power to a data centre is constant and unfluctuating, on top of providing a cost-effective bank of energy during times of higher grid demand. Power demand and the supply from its energy source must be at equal levels to ensure the data centre runs effectively, therefore, a battery can work in conjunction with the generators to provide consistent output and avoid downtime. While some organisations have recently suggested the more traditional lead acid battery chemistry is the best option for data centres, Aggreko believes that the benefits of lithium ion batteries make them much better suited to the growing market for five key reasons. Lithium ion technology tends to have a much higher energy density, can achieve an 85 per cent depth of discharge compared to lead acid's 50 per cent, and is usually 95 per cent or more efficient, meaning almost all of the larger amounts of energy stored in the battery can be harnessed. For a data centre, this higher availability of power means that supply is readily available for longer and can keep up during periods of increased demand.
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