If you are looking for general device access rather than restricted grid settings, one of these common defaults often works:

Rarely, the configuration file becomes corrupted. Perform a :

: End-users are instructed to contact their authorized Victron dealer or distributor to obtain the password if they need to make legitimate adjustments. Configuration Context Grid code password? - DIY - Victron Community

is a specific, restricted credential required to change or disable a country-specific grid code once it has been set. Grid code setting modify to your country for installers