20.99 Jul 25, 2025
CD Oct 31, 2025
IEC
TC 23/SC 23K
International Standard
PROJECT
IEC 63402-2-1 ED1
20.99
WD approved for registration as CD
Jul 25, 2025
Energy efficiency - Customer energy management systems - Part 2-1: Data model and messaging - Interface between the distribution system operator/ energy management gateway and customer energy manager/ building energy manager (Proposed horizontal publication)
10.99 New project approved