Here is an observation of the parsed data for those using an LFP battery pack. It seems there is always the question of what charging parameters to use with this chemistry (bulk voltage, absorb voltage, absorb time, WbJr end amps).
First, I have the charging parameters for my 48v 400AH LFP pack set as follows in the controller:


I realize that bulk charging to 58V (3.625) is a little high, but I'm running shakedown tests with newly added panels to learn the max power the system can create each day (still not enough!). For me the question has always been;
How much longer do you charge after hitting the target voltage?
One of the deep mysteries of the universe, it seems. But the below output file from a one-day cycle seems to contain a clue.
Don't let your eyes glaze over. It all boils down to the action on two highlighted rows.
Parsed output file (1 minute granularity)

Notice that at 11:52AM (row 716) the controller transitions from Bulk MPPT (stage 4) to Absorb (stage 3). Pack voltage is 57.9V, which for the purposes of this discussion we'll note as virtually 58v (it may well have hit 58v in the more granular data). Notice Input current is 9.6A. So the batteries are clearly still soaking in amps at that voltage.
Now notice that 10 minutes later at 12:02 (row 726) the controller has transitioned to Float (stage 5). That is only 10 minutes, even though the Absorb time is set to 1hr. So clearly that timer did not trigger the state change. It must be amps. In that 10 minute period the amps dropped from 9.6A to <1.4A. Again, I'm assuming that the granular data shows the current dropping below 1A. The WbJr End amps is set at 1A.
Tentative conclusions (at least with this battery pack and the charge curve on this day):
1) The LFP cells continued to draw current after being fully charged. But not for that long.
2) Current did in fact decrease, finally dropping to zero or near zero. Certainly less than 1A. This argues that WbJr End amps may be a preferred way to terminate charging as opposed to using an arbitrary number of minutes as the determinater to end charging.
Is my logic sound?