Possible? Raspberry Pi + Touchscreen with Venus OS as second Cerbo GX for telemetry?

To my knowledge, there is no way to direct connect a second screen.

When you use an RPi w/Venus OS, you’re creating a new GX device. You can only have one GX device per system.

Do you have any old phones or tablets of any brand that are no longer in use? You could use remote console through VictronConnect wifi’d to the Cerbo, or you could run the VRM app on it, or remote console through VRM. VC remote console is direct wifi and the most responsive. VRM app or remote console through VRM will use the internet connection.

My system is in my shipping container feeding two 5ers. I plan to implement something similar to what I describe above. I have at least a half dozen old android phones and at least 3-4 tablets. Simply need to plug into USB power and mount it somewhere.