In the technical area https://www.victronenergy.com/support-and-downloads/technical-information
There are 2 spreadsheets which show Modbus addresses
EVCS-Modbus-TCP-register-list-v2.2 and CCGX-Modbus-TCP-register-list-3.20
There is an error with the description for addresses 3027
3027 and 5026 both relate to the physical position of the EVCS in relation to the inverter.
The description for 5026 is correct, the description for 3027 is incorrect