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Okay. After 24 hrs, they are all at 3.57. Does that seem about right?

Thank you again. If I did these things correctly, I tested continuity between the battery terminals and the balance lead connectors for each of the wires and they seemed okay. I then did at @Ampster recommended and used my voltmeter to probe between the main negative and each of the balance...

DING DING DING DING! Thank you guys. I hooked up the B- and it looks great! Now the question is do these still need to be top balanced? This is for my van which uses solar and alternator to charge. My van is getting a new clutch so I have some time to get these balanced but don't really...

My voltmeter only has 2 decimal places But reads 3.63 for each cell.

Those are for the shore charger that this thread is about. I have now removed the negative from the terminal and connected it to the other side of the BMS.

Thank you @gnubie and @smoothJoey This is all very helpful. I think I may be on to something but it raises more questions. I have screenshots from the BMS app from two different days. The first screenshot from about 20 days ago shows the cells well balanced. I think this was a>24 hours after...

Very likely I’m using imprecise terms. In the photo, you can see I am connecting the charger to the terminals circled in red and brown. The terminal in brown is connected to the BMS. Is this the proper way to connect this? And it shouldn’t overcharge the battery?

That makes sense. I used the setting recommended by the BMS reseller. What would you say is "slightly higher"? I set it to 14.60 for the cutoff for the entire pack. I put screen shots in my other response and am interested in your thoughts. I am using the Lithium setting on the Renogy...

Ah. I see. Not connected. While the manual notes this exists it doesn’t mention anything about connecting.

Thank you all for the feedback. I think I am hearing it is safe to leave connected to the main pos and neg for the occasional overnight use since it is so low power. Could I leave it connected for a long time? It may not very quick (which is fine) I just need something very infrequently to help...

Clearly I need to be more patient before posting. Took several days but looks good now.

Thanks. I will make that change.

I made a bad mistake overnight and ruined my battery that is installed in my van. See photos. I need advice on how to safely remove these cells. They are completely wedged in since they are so far swollen. Will the swelling go down? How long will that take? It has only been a couple hours...

I guess when I think about it, my real question is "is this the proper way the battery is supposed to be charged and is it safe and healthy?" I assumed the BMS or charge controller would prevent the cells from ever hitting the 3.65 and that when this happens the cell is either unsafe or being...

The BMS seems to be correctly reading the cell voltage an shutting off the battery appropriately. I don't remember the exact voltages of each cell but when the over voltage protection kicks in one cell has been at 3.65 and the other three pretty close to that. Yes, my multimeter agrees with...

Willing to give it a try. A little afraid to reconnect the individual cells. Can I drain them individually and any guidance on how to do that would be welcome. The voltage is all over the board with them but they are up to 3.8v

Acknowledging that I am a noob to all of this. Recently received my four 120ah Lifepo4 cells from Alibaba and BMS - same as sold by Overkill solar. The cells look fine and measured individually ~3.27 each. I attached the BMS but it is telling me a very different story. Pretty sure I have...

Thanks for the link. to the other post. I don't know how high they got. I set things up last night then came back to this and quickly disassembled. The highest I currently see is 3.95 v (correction from my earlier post of 3.8).

UPDATE———— I was able to drain a couple of the cells some but don’t think that reduced any of the swelling. I think the tight box must have saved me and kept them from bursting open. I was eventually able to extract one of them using a little motor oil and elbow grease. The cells are in tact...

I have some dumb appliances. Would I simply connect wires from pos/neg from the individual cells to an extra outlet and plug in the appliance?

Yes, but I accidentally bypassed it.

Tried to keep the battery setup in my van simple with just the cells, BMS, and electronic bits but am really dissatisfied with monitoring the battery through the bluetooth from the BMS. The SOC seems to be all over the place and a few other annoyances. Can someone point me to a product or...

Hey everyone. I have some new cells I am trying to top balance and it is taking longer than I think it should. I first wired them up I series and charged them up before putting them in parallel and balancing. I set the power supply to 3.65 volts and have been running it for a couple of days...

It is definitely an acquired taste ?‍♂️ Actually I was draining voltage in the hope some of the swelling would go down.

I calibrated the voltage in the app using my fluke meter. Is that what you are asking? It was surprising close to the readings from my meter out of the box. My Fluke multimeter doesn't measure current, and my other meter is a cheapo big box meter.

my voltmeter says 3.34-3.35 volts fir each cell. I haven’t tested the capacity yet but they are supposed to be 120Ah. in addition the the shit alligator clips and cheap power supply, I had to make a couple of my own bus bars which may be throwing things off a bit.

Thanks. Just confirmed that I am using these setting. Sorry. I don't understand the question. Are you suggesting I disconnect the balance cables and bus bars and read the cells?

That screenshot may have been when the battery was still on the workbench and resting after charge and top balance. :)

Should I be able to connect an inverter you think?

Just a regular socket with a couple of wires should work?