The Delta RT-1K is a 1KVA (900W) online double-conversion UPS built to keep small offices and home offices running through power outages, surges, and spikes. It uses true online double-conversion technology, which means your connected equipment is protected by pure sine wave output with zero transfer time - there is no lag or blip when the power fails, unlike standby or line-interactive UPS units. Internal batteries (24VDC) make it a simple plug-and-protect solution with no external battery cabinet required. It's ideal for a single desktop PC setup, home office backup, or a small retail counter that needs to stay powered during load shedding or grid instability. Suitable equipment includes 1 desktop PC, 1-2 LCD monitors, a Wi-Fi router, a POS system, a CCTV DVR/NVR, and a small network switch. On light load, expect up to 1 hour of backup on 7Ah batteries or 1+ hour on 9Ah batteries. Additional protection features include LCD display with intelligent monitoring, overload and short circuit protection, and high efficiency operation. Price excludes VAT.