Others who have LFP will have to confirm, but AFAIK, the 13.7 is too low for the cell balancing to get started, and that needs to be done every so often. I think the balancing can be observed on the Trimetric.
The 14.4 BMS action seen might be the balancing starting, but if you are driving and stop, I don't know how it can finish balancing.
BB says:
1. passive balancing process is activated by the BMS at the top of each charge cycle, when the battery voltage exceeds around 14V. This ensures that all the cells remain at the same state of charge, which helps for pack longevity and performance.
2.For your Bulk/Absorption stage, the ideal voltage is between 14.2v-14.6v. For full charge and BALANCE, the absorption mode should be set to last for at least 20 minutes per battery (for multiple batteries in parallel).
