I came across this useful on-line calculator today. It contains ENERGY STAR, EC Ecodosign (EuP) and China specifications for efficiency and standby power. By entering measured data such as power, standby power and efficiency of external power supplies the calculator shows if the power supply meets various international efficiency requirements.
If nothing else, the calculator shows how stringent and complex the requirements have become.
Power analysers like the Voltech PM1000+ are used to make the power measurements required in accordance with IEC62301.
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