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I don't think it's float. There is a discrepancy but the other way, at 26.5 on MPPT the BMS shows 26.30 something. So on 26.7 on BMS the charger actually shows 26.9 V.

Hi all, I have a problem understanding how my MPPT charger works. This is my setup ( 24V off-grid system): - two 410W solar panels - EaSun SMH 3k inverter with MPPT charger - home built LiFePO4 7KW battery with JK BMS According to the manual, the charger should use a 3 stage charging...

Hi, This is my setup ( 24V off-grid system): - two 410W solar panels - EaSun SMH 3k inverter with MPPT charger - home built LiFePO4 7KW battery with JK BMS I added DC loads directly on the battery, fused of course, is this a security issue? Also I'm not sure how charging works. The charger is...

It is bogus, but I am wondering if it's just a lack of calibration or could indicate some other malfunction.

I only have a screenshot a few hours before the incident, attached. The battery has a few cycles and I really think it was displaying SOC correctly. The voltages after the incident were similar, above 3.3V . There is a fuse behind the switch, this one...

1. Makita ELM3310 series, attached specs screenshot. 2. Unfortunately it's at anoff-grid cabin and won't get there until weekend. Which settings are related to SOC? I only changed capacity - 280ah, cell type - LiFePO4, under voltage protection - 2.9V, over voltage protection 3.5V as far as I...

I don't understand why everybody is focused on the full charge discussion, that was not my question. Let's just assume the the starting 80% SOC was correct. The question is what event could cause re-evaluating the SOC from 80% to 3%, because I suspect it's a malfunction and I would like to fix...

Charging started at 3% and cells reached 3.45 V at 23%. 3.45 V means the cells are almost full as far as I know, yet the BMS showed 23%

It seems I did not explain the situation properly. It was calibrated, 80% was correct, proof is that it only accepted 20% more until full. The qorstion is why it trigered recalibration during the lawn mower usage and why it only estimated 3% when in fact it was 80% full.

Yes it mostly stays between 60-98%. But it was showing 80% before, it only charged about 20% until full so the 80% was kind of correct... How did it jump from 80% do 3% in 5 min?

Hi all, I'm running a 24V 280Ah LiFePO4 battery using a 200A JK BMS + 2.4 KW Easun inverter. Recently I ran into a strange issue: I used a lawn mower machine rated at 1.1 KW for 5 min, all worked well, but then I saw the battery SOC dropped from ~80% to 3% (JK BMS app). No error logs on the BMS...

My understanding is that voltage measuring is unreliable when you are on the flat part of the charging curve, but 3.5V is already on the steep end part. As an experiment, I increased the charging voltage to 28.2V and the cells quickly stabilized around 3.5V, with almost no current going in.

Hi, I have built a 24V / 280Ah battery with JK BMS that has 2A active balance. Initially I wanted to charge it to almost full, then put the cells in parallel and charge them at 3.6V. But then I noticed that they seem quite close regarding SOC and got lazy, so I've let it charge at 28V and...

I've never assembled a pack before, but on videos I've seen the gaps were much smaller, the edges almost touched. So it's safe to put them in a fixed enclosure that will not allow more swelling?

Hi all, I recently bought these EVE LiFePO4 280Ah cells from a seller that seems to have a decent reputation here. Advertised as grade A of course, they arrived slightly swollen. They are produced in February 2022, all measure 3.10 - 3.12 V and look unused. I know that these are not real grade...