Just fitted a 200Ah Fogstar Drift LiFePO4 in my cabin setup and I'm going round in circles trying to get the charge parameters dialled in properly via the Victron MPPT (100/30). Fogstar's docs say absorption at 3.65V/cell (14.6V for 12V bank), but I've seen people on here saying they run 14.2V to extend cycle life. Not sure what's actually right for a stationary cabin install where it's not getting hammered daily.
The BMS on the Fogstar has its own high-voltage cutoff at 14.8V, so there's a safety net, but I'd rather the Victron and the BMS aren't constantly fighting each other. Currently running:
- Absorption: 14.4V
- Float: 13.5V
- Tail current: 4A (2% of 200Ah)
Is the float voltage even doing anything useful with LiFePO4, or should I just set it lower and let the battery sit? Some people say 13.2V, others say don't bother with float at all and use the "keep charged" algorithm instead.