What electrical supply rating does a 1kVA UPS require?

A single phase 1kVA or 1kW UPS designed to connect to a single-phase electrical supply. It is sometimes called a single-phase UPS for a 1/1 (single phase in and single phase out) installation. The UK electrical supply voltage is 230Vac 50Hz and a 1000VA UPS will be supplied with a power cord with a BS1363 3-square pin plug to plug into a wall socket. Power from the UPS is provided typically by IEC320 C13 outlet sockets on the rear of the UPS or via a UPS maintenance bypass or a a power distribution unit (PDU) if either of these are also installed.