[PNW Fireguy]

The lithium battery packs we have discussing in this thread for RV purposes are all regulated by battery management systems. The BMS among other things prevents the over discharge of the battery pack. In the case of the drop-in replacements that I have knowledge of overdischarge is not only not possible without a major component failure but the settings are so conservative that what the ender user observes as maximum capacity (discharge or charge) is actually a conservative safety margin setting embedded into the BMS by the manufacturers.


LiFePO4 batteries have a sweet spot they like to live in. The closer you set your state of charge and depth of discharge around this sweet spot the higher the maximum lifetime cycles you will obtain from your pack. If you keep lithiums at 100% charge consistently their life will be decreased. In general running to either extreme charge or discharge will shorten their life as will operation at temperature extremes.



If you can live generally in the 85% SOC to 20% DOD you will find the sweet spot of maximum life span without overly sacrificing potential capacity. This does not mean that you can't discharge to 5%. If you consistently do however your chances of reaching the stated 10,000 cycles are reduced.