For additional context, the reason for this is that LFP cells have a much flatter voltage curve than other chemistries [1], so the BMS is forced to guess at the

For additional context, the reason for this is that LFP cells have a much flatter voltage curve than other chemistries [1], so the BMS is forced to guess at the state of charge by tracking how much current has gone in/out of the battery, which is subject to drift. 1: https://www.researchgate.net/profile/Anupam-Parlikar/publication/337751227/figure/fig6/AS:832556693999618@1575508392705/Open-circuit-voltage-curves-left-for-the-the-LFP-C-and-NMC-C-cells-with-a-schematic-of.png https://www.researchgate.net/profile/Anupam-Parlikar/publica...