Hi Matthew
Although I’ve not checked that they all correlate, I believe that the
efficiency calculations originate from the International Efficiency Marking
Protocol for External Power Supplies:
https://beta.regulations.gov/document/EERE-2008-BT-STD-0005-0218
The requirements were negotiated between EC-hired consultants and
industry stakeholders. Or so I was assured.
==
Best wishes John Woodgate OOO-Own Opinions Only www.woodjohn.uk
Rayleigh, Essex UK
"A nation
EU 2019/1782 is the ecodesign requirements for external power supplies, i.e.
their efficiency, for Directive 2009/125/EC. Someone asked me how the formula
in 1(b) of Annex II of the EU 2019/1782 regulation was decided upon. This table
sets out the determination of 'average active efficiency'.
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