The main difference between models is how they work: Line-Interactive units (the Eaton 5E, 5SC and 5PX series) suit a computer or home network gear, while double-conversion Online types such as the 9E shield sensitive server and network equipment from voltage swings. When working out the load it is watts that count, not kVA — watts are what tell you how many devices the UPS can carry. Check the number of outlets too, and whether the unit stands on the floor or mounts in a rack.
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The main difference between models is how they work: Line-Interactive units (the Eaton 5E, 5SC and 5PX series) suit a computer or home network gear, while double-conversion Online types such as the 9E shield sensitive server and network equipment from voltage swings. When working out the load it is watts that count, not kVA — watts are what tell you how many devices the UPS can carry. Check the number of outlets too, and whether the unit stands on the floor or mounts in a rack.