Yes, LiFePO4's can possibly be charged up to 3.65V, but this will surely reduce the lifespan of the cells and thus a lower Voltage is advised, usually 3.6V is quoted as maximum, but even this seems a tad high to me, currently I am running up to 3.500V per cell (56.000V for 16S battery) and start balancing at 3.450V, should I go lower yet? What are you running your cells at? and what is your reasoning if it is higher or lower than mine.

Edited November 2, 2025Nov 2 by Kalahari Meerkat
correction made

I keep mine at 55V its 3.43V per cell, the reason I use this cell voltage is because I still pull full capacity from cells, and I set my JK bms to start balancing at 3.40V.

I works for me.

I charge mine to 56v it stay there for about 30 min, then it drops down to 54v, if it does drop below 53.5v due to a load being turned on, it will re-bulk back to 56v. Rinse and repeat. I start my balancing at 3.45v

56V like many other here.

Watching a lot of videos from will and https://www.youtube.com/@OffGridGarageAustralia

Nice top balance at 3.65 after that just keeping it at 3.5v

Ok, thanks @stefan44 , @Greglsh and @Stefan Cornelissen

@Greglsh , I'm off grid, so it hardly ever does what yours seems to do, unless some clouds come in after the batteries are full and we run off those for a while before the sun returns, but even if we're down to 92% SoC before sunset, at this stage the lowest morning SoC I've seen is probably 45%, so not too panicked about the lower SoC late afternoon, unless the next day is supposed to be cloudy, then I try and minimise the consumption overnight, I guess I need to get off my lazy butt and add the other 2 batteries, to have a combined 60kWh and thus no more panicking :-)

Ok @stefan44 on your settings... 30mV for balance to cell max voltage seems a bit skraal, meaning it won't get much chance to balance before things drop out of range, just looked at yesterdays charge, 3.400V by 12:00, 55V by 12:22, and effectively if that was my setting, probably not 20 minutes later cells would be 3.400V or less and thus end of balancing... ok this was on my worst battery and there was 26mv delta between the cells once 55V was reached...

I'll do some more homework, maybe can start balancing earlier, say 3.400V and then bring cell max voltage down to, maybe 3.480V so 55.68V for the pack...

Since 2021 I used the voltage settings below (no comms between Inverters and Batteries):
55.6V (3.475V per cell): Absorption phase
55.2V (3.45V per cell): Equalization for 1 hour (and yes I know all the super intelligent says it is not for LifePo4 ... but trust me it is good for the slow cells to catch up again)
53.6V (3.35V per cell): Float

Over 4 packs (i.e. 64 cells) the voltage difference is normally below 10mV