I am no expert, just a critical observer.
There is far too much over concern about LFP cells sitting at "FULL" SOC. 3.65V and lower will NOT hurt the cells and over time they will self-discharge albeit quite slowly. The cells never sit there as they will always settle, typically to 3.5** Volts. Where keeping Voltage Hi is a problem, is with people "FLOATING" cells to Hi State. The other problems are also if there is a runner or lazy cell playing games in the battery pack. If FLOAT has to be in the equation due to charger type then it should be set to lower than max charge value, typically around 3.4V per cell equivalent.
EVE says 0.05C Rate for their cutoff for 14A on a 280AH cell. I have force charged, trickle charged and it seems I cannot get below 1.7A... Just had cells Topping for 12 hours and they ARE full but 1.7A was the lowest, they are actually now sitting in parallel just cell leveling. Each cell was Top Charged to 3.62V and allowed to reduce to 1.8A and allowed to settle, after 24 hours they all settled to 3.55 +/-10mv, then set in parallel and Top Charged as a set till amps taken dropped to 1.8A. These are "H" & "J" Series EVE 280's. @ 14A I can absolutely tell you that the cells are NOT at 3.65V, that it more in line with 3.500 +/-50mv zone.
A NOTE:
You can start to charge cells at 10, 20, 40A but as they charge the amps taken will reduce down to 2.0A +/- at which point the cell is saturated. It does not matter if you start with 5A or 20A, just the lower the amperage the longer it will take. !! The higher the amps, the faster the charge, a maintained "forced" Hi Amp charge will heat up the cells. NO Solar or Inverter will or can "force" that !
Using End-Amps / Cut-Off Amp with battery packs can be quite problematic, especially with Un-Matched cells.
An SCC or Charger will do normal charging using Constant Current & Constant Voltage CC-CV and will reduce amperage relative to the impedance, which is as it should be. BUT it's a FOOLEY in part! Because of the number of cells in the pack, it's an aggregate value of all the cells. If the cells are UNMATCHED, they will have different Internal Resistance & Impedance values at differing charge levels. This can be observed at the cell level as you cycle the battery pack, as the cells deviate through their cycle of charge/discharge.
- For End-Amps to work, all cells would have to reach the same threshold at the same time.
- If you have more than One Battery Pack in a bank, they would all have to reach the same point at the same time AND would have to assume you are charging each battery pack to 100% SOC... which 99.9% of folks do not do.
- Reality is that typically, because of runners or by design, packs don't usually get charged above 90%, usually more often to 85% SOC. At 90% or 80% the End-Amp value will not be 14A.
The Main Voltage / Power curve for LFP is from 3.450 to 2.900 (Edge to Edge). Nominal is 3.200V.
Above 3.45V only represents a few AH as it is a cliff climb. Below 2.950 to 2.50 is also only a few AH... probably no more than 14AH worth on both ends.
Hope it helps.