The APC Easy UPS On-Line series (1-20 KVA, 230V) is a versatile, high-quality double-conversion online UPS system designed for IT professionals in small to medium businesses. Available in three configurations—Standard Models (built-in batteries), Extended-Run Models (expandable with external battery packs), and UXI Models (compatible with third-party external batteries)—these units provide advanced power protection in unstable power conditions with efficiency up to 94% in double-conversion mode and 97% in ECO mode.