16s @ 3.65 = 58.4 volts
Why are you only charging to 54.4 v?
That would be exceptionally high for lithium, that is pretty much at most accepted high cell warning levels.
There is next to no capacity at that voltage, but you will reduce the battery life significantly and any high cells would be in nasty territory.
Typically they will be kept around 3.5V or below per cell.
54.4V is on the conservative end, sacrificing a small amount of capacity but providing a great lifespan.
Thanks Nick
The JK BMS has 3.65v max limit preset for LFP cells.
I have top balance charged all my cells to 3.65v.
What IYO should I set the JK BMS max value to?
If it were my own pack I would keep cells a little under 3.5v.
Using max voltages is rarely a good idea for a battery, if you want it to look after you long term.
The hotter the climate, the more conservative the better.
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Have moved to its own topic in modifications, best place for JK and self-build battery discussions.
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Thank you Nick
I did notice that going from 3.50 v to 3.65 v only required a current of a couple amps for a few minutes whilst top balancing my 320 ah cells
At the absolute top there is so little capacity juice to squeeze. It just isn’t worth it.
If you leave yourself some wiggle room it will be better for stability and lifespan.
Hi Daniel, also drop down your top balance value to 3.4 or 3.45 volts so you start it just before the battery hits full charge. This allows the battery time to balance out and actually get full charge. But this only really works if the charge is backed off and is consistent so the 2amp balance has a chance to get it under control.
My eve cells have been in for 2 years and they are typically within about 30mv when approaching full charge. However with the recent high charge rates that I have been experiencing with the additional solar installed over the last month, I am now getting single cell high voltage alarms on 3 of the batteries as well…Just another issue with a lot of solar for winter & summer times, that is not needed in the shoulder months.
Another problem to solve.