The APC Smart-UPS RT 6kVA is a double-conversion online UPS built to protect servers, network equipment and other critical loads from South Africa's frequent load shedding and grid instability. Unlike a standby/line-interactive UPS, an online double-conversion design continuously regenerates clean AC power rather than only switching to battery on failure, giving connected equipment a zero-transfer-time, tightly regulated power feed at all times - important for servers and networking gear that are sensitive to power glitches, not just outright outages. At 6kVA, it's sized for a server rack, small data closet, or a cluster of critical network/PABX equipment rather than a single desktop PC. Runs on 230V mains.