Enterprise Server Room UPS Selection and Capacity Planning: From Power Distribution to Runtime
April 27, 2026
Start by understanding the operating conditions: the essential difference between online and standby UPS. Last winter I visited a client’s server room for an inspection and found they had equipped their core database server with a standby UPS. The boss said confidently, “As long as there’s a UPS, it’s fine.” I asked whether he knew how long a standby UPS takes to switch over, and he said, “A few milliseconds, it doesn’t matter.” In fact, a few milliseconds matters a great deal for an x86 server running an ERP database…