I was kidding about the meters of course. They have a spread of voltages representing an SOC level.
The range hood four- light in an RV is set for 12.7 being full and yellow is about 50% (12.2) But eg, my AGMs are 13 full resting and 12.4 at 50%. Not sure about Li voltages. What does the 12.8 mean with the Trilliums anyway?
You can't calibrate those meters to change their voltage ranges per colour of light.
What happens with the Trillium gauge for reading with resting, loaded, and being charged voltages? Maybe that is why they have such a wide spread of estimated SOC. Useless?