To enable solar/wind charging priority you currently need to make changes to the VeBus configuration via VictronConnect or veconfig. You also need to set a battery VOLTAGE threshold for the feature. Currently, you can override solar/wind priority and force ONE full recharge using grid power, but after the recharge completes, the system returns to solar/wind priority.
I understand that this allows the functionality without a GX device. But I can see situations were you would want control over the functionality from the GX menus if a GX device is present.
I propose that the system be updated to allow the GX device to turn the charging priority on and off from it's menus and further to set a state of charge threshold for grid charging.