Why is my lifepo4 not charging to 100% soc ??

[Jason flores]

I have 16 eve 315ah cells with jk 200a(non inverter) bms 6000xp and 9kwh of solar the batteries when hooked up stop charging at 3.4v . When I leave my property I take my batteries home due to freezing temps .I'm going back to the property and put a 60v 25a charger to them incase we get in at night (no solar)
5 Days ago the cells were at 3.21 after 5 days of charging are only at 3.32 and charger is only charging at 55w ?
Why can't I get these to 100% soc

 

[hwy17]

They only reset themselves to 100 when they hit the alarm pack voltage I believe, which I think is silly. I set my alarm parameter all the way down to 55V just to get it to regularly reset.

 

[robbob2112]

Cell resistance increases as you approach full. So they charge fast between 20 and 90, but much slower for the last 10%... Just like electric vehicles

 

[740GLE]

Are you tacking total KWHr going in and out?

If the cells reached 3.45v during charging, any sort of load even 20-30w can bring those cells down to what you’re seeing.

Have you ever brought the pack up to 3.45v/cell? If not then the BMS is just guessing when it states 100%.

I’m guessing you want to see 3.45v per cell?