In case anyone interested, the command (sent via UART) for settings the SoC parameter in the Daly BMS (this also writes the date/time), is as follows:
A5 40 21 08 - the usual header; 0x21 is the command-id to write SoC and RTC
160C0D151D27 - 6 bytes for the date/time. YY-MM-DD HH:MM:SS. This...