Eaton 9E Double-conversion (Online) 1 kVA 800 W 4 AC outlet(s) Once you have a UPS (Uninterruptible Power Supply), there is no need to fear for data loss due to power outages. If the duration of the outage is short, you can work on without being disturbed, and if it takes longer, you will have more than enough time to save your work and safely turn off your computer.