Backup Power Supply CyberPower OnLine S UPS 1000VA/900W, 2U, XL, Rack/Tower:The worst thing that can happen to you when you work on a computer is a power outage just before your work was about to be automatically saved. Your document has disappeared, and you must start from scratch. Such catastrophic scenarios can be warded off by the CyberPower OnLine S UPS 1000VA/900W, 2U, XL, Rack/Tower backup power supply. This is just another name for a battery reservoir that powers all appliances needing electricity. The CyberPower OnLine S UPS 1000VA/900W, 2U, XL, Rack/Tower UPS uses the Online with double conversion design approach. Off-line is the most basic form. The line interactive UPS enhances the simpler off-line version of data line surge suppression . The most complex system is the online double-conversion UPS, where the input voltage is fed to a rectifier, with output being supplied by an inverter. CyberPower OnLine S UPS 1000VA/900W, 2U, XL, Rack/Tower Backup Power Supply Key Features Type of backup power supply: Online with double conversion Actual performance: 900 W At a 100% load, the UPC will work for 5 min A key parameter is how long the UPS will function when the electricity is off. This is governed by the energy consumption – for example, at half-load (50%), the backup time will last a longer amount of time. The load of the UPS determines the operating time, which at maximum load is 5 min and at half the energy consumption, it is 15 min. It is therefore crucial to calculate the power consumption of the connected appliances and ideally to add some spare power left. The CyberPower OnLine S UPS 1000VA/900W, 2U, XL, Rack/Tower specifies the apparent power as 1000, but in reality, the actual power usage is 900 W.