I set 14.6V because it also works slightly faster for charging from a gas-guzzling Generator. In my experience with charging my own LFP battery bank, the batteries need about 40 minutes of additional charging, after 14.6V charging voltage is reached, before current drops to roughly zero amps. My MPPT charger can only do about 30A, while my test charger does a bit more than 60A - so I conclude that it needs about 80 minutes from the MPPT. I can certainly drop from BattleBorn's 180-minute value to perhaps 80-90 minutes maximum (and still finish the job). But charging at only .17 C maximum current, I need more than 30 minutes to reach 100% SOC.You should review this setting. The charger puts current into the battery until the boost charge voltage 14.6 is reached. It then holds the voltage at this level for the boost duration. That is holding the perhaps fully charged battery at 14.6 volts for 3 hours. This seems a poor method of charging a lithium battery where a fractional C charging rate is used.
Victron for their lithium batteries recommend 14.2 charge voltage, no or a maximum 30 min absorption time, (the boost duration in Epever speak), and a float of 13.5 volts.
I wonder about Victron's advice. Is 14.2 Volts really adequate, when most BMS boards are willing to individual cell charging to reach 3.65 Volts? It seems to me that if one or more "happy" cells wants to absorb up to nearly 14.65, a single "recalcitrant" cell might be left significnatly lower than that. (The average of all cells would be 14.55, but some could be higher, while another is low). If BMS was reprogrammed to terminate cell balancing at 3.55 per cell, they would all get pulled up to that (by a 14.2 Volt total). But most BMS defaults to 3.65 on each cell.
Thanks Mike, you brought up great points and my "Boost cycle time" does appear to be too long (by at least a factor of 2). I'm not sure, however: Does it stay in boost mode for the whole time, even if "Float Voltage" has been exceeded?