People should check their batteries capabilities, well designed batteries will have a set up with one chosen as master and the rest as slave an report the stats as a single bank to the Cerbo via CAN Bus.
Anyway, if you are interested you could look into the following.
- Load the beta test firmware V3.60~53 (or latest version) Large Image.
- Enable Node Red.
- V3.60 Node Red has a node called virtual battery which you could generate a single pseudo battery of the right capacity.
- You will then need to read in the information such as SOC from each battery using battery monitor or custom input nodes. I do not know if you can bring in CVL etc.
- You will then need a function node to calculate the SOC of the combined battery and output that to the virtual battery.
- The virtual battery will then appear on the Cerbo and can be chosen as the battery monitor.
You will need to investigate this yourself.