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Starting with this post should explain it: https://diysolarforum.com/threads/problems-with-batteries-low-cell-voltage-happened-to-four-different-batteries.70891/post-918308 Then read the following three or four posts through post 58. I cycled through each cell a second time after doing it a...

Thanks. Since the batteries themselves don't seem to be reporting SOC correctly, is there a way for me to measure it?

Can someone help me with accurately measuring (or at least estimating) the state of charge of a battery based on voltage? These two batteries show a SOC of over 99% with voltages of 51.1V and an average cell voltages below 3.2 Volts. Thank you.

I had an issue with the two most recent batteries that were received from trophy (#3 and #4). These were very recently top balanced. I've had about 3-4 days now with little sun. I have been using these batteries little during that time. Mainly LED lights and a fan at night. Last night the fan...

Thanks! Definitely worth the effort to do this since it is already opened up and I'm setup with the DC power output. Appreciate your help!

It's certainly taking longer to charge each cell (and that particular low cell took a longer time). Is that going to be a recurring theme then with this battery? I was hoping that lower capacity just means that it would not achieve a certain voltage. And seeing that it does achieve high...

Update!! I've been able to get all cells up to approximately 3.62V individually. Then I went through and charged them again. That took approximately 15 to 30 minutes each. I've connected this battery to my inverter today. One of the cells was high to start with (i think about 3.5...

Thanks so much for the reply! (and @sunshine_eggo too while I was typing). The current is very very low. I just checked...0.02A. I'm using a voltmeter to measure the voltage. The clips are what came with the charger. Not great (as discussed before) but what I have on hand. So, based on the...

This has not had any issues and, yes, I've had plenty of rainy days since then (lol). Thanks for the suggestions however. I appreciate it.

Ok - This is for battery #4 (the most recent replacement battery that I've had for about two months now). I was getting pretty frustrated in that a few of low voltage cells were not getting any higher on many subsequent charges. They were similar voltages when the battery would go OV to the...

Unfortunately I haven't been able to spend as much time with this recently as I had been. Here is my most recent attempt at maximum charging of the most recent battery received (battery #4 - same as in post #52). Again, I've got the print screen when the maximum cell voltage hit 3.75V. I...

Here are the results today from charging using 55.2V/5A. This is for battery #4 in my first post. It is the most recent replacement battery (received in September 2023). The first picture here is before charging using the DC charger: The second picture is right when the maximum cell hit...

Thanks for the help! I will at this point work on the batteries that are connected to the solar panels. This battery above is the first battery from the first post and post #3. This battery was replaced. However, when I attempted to return it, Dan said don't bother now. Same with the other...

Here are my BMS settings on the first battery: Here are my cell readings before charging the battery: Here they are after charging and hitting max cell voltage protection: When I re-connected the charger to this battery to charge it, it would not charge. Even though the battery cell...

I've had a few problems when following the suggestions here so hopefully someone can help. The battery that I've been working on most is not connected to solar but only charging through the DC charger linked in posts above. That's the battery mentioned in the most recent few posts. As...

I just tried charging. It worked for two minutes. However, the max cell went from 3523MV to 3750V in that time. Then the charger shut off. I can access the BMS of the battery. Is there any settings that I should check? On the BMS, I only changed settings previously that Dan had advised...

I actually forgot that I own the item below from back when I was doing drone building: https://www.amazon.com/gp/product/B00L5YBJI2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 I could use this if I can find it. If I can, maybe bring the high voltage cell down to around 3315V (around the...

I just did some quick research. Very quick. I came across this post: https://diysolarforum.com/threads/one-cell-level-too-high-lifepo4.50670/post-653807 would using a regular light bulb do this? I also know I have some resistors but I think they're pretty small for tinkering with...

I unfortunately had to turn off the charger for now. I'll turn it back on tomorrow and hopefully it will charge again. The battery was down to 53.35V with max being 3.582V and min being 3.256V. However, there wasn't any charging going on still. I think it was about 15 minutes before I...

So I'm charging one of the batteries as described above. Got the lowest cell up to about 3.15V. Then Connected the charger to the busbar and set it to 55.2V with 5A. It charged slowly but the AH was moving up. I've checked it every 1/2 hour or so. About 3 hours later, I checked it and it...

I do want a whole battery charger. I just don't know how to do this using what I have and you suggested (the DC power charger). I meant to say I only have used it the way I described. If there is a better way of charging the whole battery (especially if I don't have to take the battery top...

That's amazing! I actually own that exact one. Well, it's a variation of it but I can't tell the difference. This is what I own: https://www.amazon.com/dp/B0B7739SMN/ref=dp_iou_view_item?ie=UTF8&psc=1 I've been using this to bring up the cell that goes very low up to 2.8V and then...

One more thing...Instead of a panel connection, could someone recommend a charger for this? If they're not too expensive, then I'd possibly go that route. I have only charged with solar and per Dan in the past, made sure it stays at 100% even though 100% doesn't mean 100%. I'm sure now based...

Thank you guys for the responses. I appreciate them. I'll hook up my batteries to my panel and charge that way and limit usage until that. I've just recently been very frustrated with what's been going on "in life" and this was just piling on. My frustration came out in my last post. If...

You're right...you aren't following me. You seem to be dead set on comparing my use to lead acid, which I am not using. "If these were lead acid..." and "you would be destroying lead acid left and right". How can what I'm doing be "habitual" when I've owned a battery for less than a month...

The battery was at about 75% SOC 30 minutes ago. Now I just checked it and it is at 0% SOC. During that time, I only had two led lights on. This is as it happened previously. Obviously the Low Cell Voltage was triggered to stop the battery. However, to bring it down to 0% SOC doesn't make...

That's good to know. I did not realize these packs were as sensitive that a few months of averaging 3.33V or so, and not hitting 3.4V, could cause them to break down. It sounds like this is industry wide and not specific just to Trophy Batteries. How do you guys handle the winter months where...

I agree that the cells are very messy. I've looked through some of my solar assistant screen shots from the past. One of the batteries would get above an average of 3.4V while charging, while the other would be an average of 3.33V. Both would be at 100% SOC according to SA. These...

Thanks kts78! Dan advised me to move it to 56V a while ago. I believe it was lower than that as default. Obviously that didn't do the trick. A couple of questions: Do you think 56.8V will make a difference from 56V? If not, any other suggestions? Can anything be done about the 80% SOH...

On my LV6548, bulk charging voltage (#26) is 56.4 V. The floating charging voltage (#27) is 56V. Low DC cutoff voltage (#29) is 48V.

Thanks so much for the reply! I forgot to mention that these issues all have occurred within 1.5 years. The most recent replacement (the last one mentioned above - battery 4 below) was installed in my system in the end of September, 2023 (less than a month ago). The previous replacement...

Hello - I'm using trophy batteries 120AH 48V. I purchased two of them. Since purchasing these, they have needed to be replaced. The first one would had a cell that continually went below 2.8V, which I believe was the cutoff where the battery would go into alarm mode. It would actually go...

Thanks for your quick reply! I appreciate your help. Paul

I have another question for this and it's regarding grounding. Right now I have a 10 gauge grounding wire connected to the solar panels using the Iron Ridge grounding lug. That is a continuous wire (well, except where I had to cut it to ground metal boxes before continuing on). It heads from...

I sent a response email to Ian regarding this. I informed him that some of the panels were in different directions and so true theoretical total amps would not be hit. I asked him if going over 18A is harmful for the LV6548 or if the excess amps are simply clipped. He indicated that the amps...