Collection: Uninterruptible Power Supplies

Sizing on VA alone is what leaves a unit shutting down early, because the watt rating is the real ceiling and it sits well below the VA figure on most models. Add the draw of everything you intend to plug in, then decide how long you need: enough to ride out a flicker, or enough to close files and power down a server properly. Line-interactive suits desks, double conversion suits comms racks. See powerboards and batteries.