Float means a constant steady voltage that keeps the battery from self discharge
No float on lifpo, is as far as I understand it
No applied voltage, turn off charge source
If that is the case , rebulk is no better than float, and might do more harm
If I understand this correctly, yo want to charge them to 90 percent or slightly above then turn off all charging, or hold the amps to a milliamps trickle at battery resting voltage, that will in effect do nothing
With Lifpo, is discharge recharge, no float, no sustained voltage , rebulk or otherwise
That is If I understand this correctly
So set a really low float, like where you want to start recharging, in other words a low voltage cut off point where you go back into charge ( aka rebulk ?)