The APC Smart-UPS On-Line SRTG10KXLI is a 10kVA/10kW double-conversion online UPS for server rooms, network racks and other critical loads that cannot tolerate any break in power. Because the inverter supplies the load continuously, there is no transfer time when mains fails, which matters during load-shedding and unstable supply. It delivers a pure sine wave at 220-240V with output distortion around 2%, and offers ECO mode for higher efficiency when mains is clean. The rack/tower convertible chassis has an LCD status display, two IEC C13 and one IEC C19 outlets plus a hardwired output, and USB, serial, EPO and a SmartSlot fitted with a network management card for remote monitoring and PowerChute shutdown. The internal 96V sealed lead-acid batteries are hot-swappable, recharge in about four hours, and the unit supports automatic self-tests and cold start. It measures 440 x 620 x 217 mm and weighs 81.1 kg. The rack rail kit is not included. After comparing online prices, www.marvel.co.za should be the cheapest on this product.