In this video Mike Elms states that for total power protection you will have a Uninterruptible Power Supply (UPS) system and a generator system. Mike explains that a UPS system only lasts for as long as its internal battery has been sized for. He then explains what a generator does when you have a mains failure; the generator senses there has been a mains failure, runs up to speed and prepares to come online. The generator comes online and accepts the data load and the general power is reinstated in your building with your critical load supported. Therefore your company’s power supply or operations are not affected, with no vital data or communication being lost. To the outside world your company has continued operating throughout the power shortage.