I am charging my LFP battery bank from 3 x SmartSolar MPPT controllers (2 x 100/30, 1 x 75/15). They are all set to the standard LFP charge profile of Absorption: 14.2V for 6h and float voltage of 13.5V.
They all receive the same battery voltage information from the BMV712 yet they all go into float at vastly different times. The first of which is before the the BMV712 has reached 90% SOC. I am considering setting up a raspberry pi to act as a Venus Control which i think will give SOC information to the controllers. Is that correct and/or is there anything else i can do to get everything talking to each other better?