reed cundiff wrote:
The only bit of argument I have found amongst users of LFP is whether to go with a BMS or self-monitoring. I may be OCD but not enough to continually mess with a Fluke meter to do this. Those that self monitor seem to agree that the cells should never be above 3.4 V. Serious problems occur when they are allowed to go to maximum of 3.9V. The BMS generally have them absorb to 3.6 V and then float at 3.4 V.
I'm using Outback controllers for my RV lithium battery bank. The manufacturer said to use 14.4 volts to trigger the float mode of 13.6 volts. That seems to keep the battery at about 95% full.
It is scary to self monitor. If you have a weak cell that happens to hit 0 volts, it may distroy that cell by reversing the polarity of it. The system I have came with a battery monitor and solenoids that will shut off all loads if it is over discharged.
