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Sorry, I need both. And I'm in France...

I have ordered the following con nectors. They are working perfectly: https://www.aliexpress.com/item/1005001528775851.html?spm=a2g0o.order_list.0.0.21ef1802rGvs1J

I'm using enphase M215 micro inverters with 6 Valence U27-12XP batteries (2S-3P) and the inverter are connecting and produce max possible power without any problem. The current is automatically adjusted to match the decreasing voltage. I use this to store excess daily production and use it to...

Do you start the software in admin mode?

Batteries exposure is not the only concern to me on the first picture. You can clearly see a red wire without protection chaffing against the frame...which is connected to ground. As it does not seem there is any fuse after the battery, it is a problem to come!

I have purchased the same type of power supply than the OP, but in 24V. It is basically 2 server PS connected in serie, one without current limitation, adjusted to 15V, and the other one being adjustable both in voltage and current. Components in the regulator box are blanked/scratched, so no...

jump directly to a 16S pack...it will be quicker to highlight runners and bad cells...You maybe very surprised that none of cells will have been damaged...If none of them was at 0V, I would bet they are all in good condition!

That's a huge number of cells! Testing them one by one will be tricky! I would simply charge them up to 3.65V and connect them 16 by 16 to built a 48V battery, with a BMS. Then running a load like an inverter, I would check if there is any runner on the pack and replace it. It all depends what...

In the Valence battery manual, they say than when the battery display a red flashing light, the OEM should be contacted to assess if battery can be recovered or not...except for undervoltage. It is described that if the battery reach 2.3V per cell in less than a minute at 0.5A, then the alarm...

To be honest, I just connect a 5A power supply initially and the battery quickly jump above 2.5V/cell...but I learn after that I should have charge initially at less than 0.5A, which I did for the other batteries. They are all behaving the same.

From experience, it seems recovered cells are just behaving as if nothing happen... I had Valence U27-12XP batteries that were below 2V (4 cells serie...) that just recovered and behave perfectly: full capacity. They may have lost few cycles, but given the price paid, who cares!

Sounds normal to me...

That means your power supply is not properly set...Amp should decrease significantly when cells reach 3.6X. Also, with cells in parallel, reading such a diffecence between cells is not consistent. Stop your charger immediately and check wiring and charger voltage: 3.65 without any load connected!

I think that if each bank can for any reason power both inverters at full charge (maintenance or one fuse already blown), then each fuse should be able to sustain the load of almost 500A. I would use fuse close to 1C rate for each bank, so 560A

If you don't want to provide the required details, then there is no way to help you...

No answer to the questions, no way to help you...What is your battery brand? BMS? Charger? Inverter? picture of the connections? Also, 14.6 volts for a LFP battery is full charge at 3.65V per cell. So if your inverter stops under load with a battery at such voltage, that means you are exceeding...

Maybe a little bit more details on the batteries and BMS? it maybe the BMS which is triggering a high current protection. 1500W over 12V battery bank is above 100Amps... Any bad connection would also trigger a low voltage at inverter input under load.

Thanks for the adress. My question is more targeted to Alibaba suppliers having a local stock in EU, such as some distributors have now stock in the US.

Hi! I'm looking for some cells dealer having stock in EU and with good reputation. Do you have any contact to share? Thanks in advance!

The pictures of the connections are horrible. It is even dangerous, as it could lead to overheating and starting a fire! It is poor design, poor assembly and absolutely 0 quality control! I would open all batteries and rebuilt these batteries with proper washer on both sides of the PCB, to be...

It may be that the cells are 75Ah...The Chinese seller are good in cumultaing both voltage and capacity in the description... DO you have a mean to open the battery? It would be good to check the cell inside. Definitely, a 300Ah cell is around 5.5 kg, so the spec are very light... Also comments...

13.6V is definitely not a sign the battery is fully charged and balanced. Full charge is 14.6, i.e all cells at 3.65V. Having 0 Amps at 13.6 may be with a low cell, that will trigger the low voltage protection of the BMS.

Well it was an issue with the RS 485 dongle...After replacing it, I have been able to read and save current configuration.

Hi to the group! I would like a confirmation of the wiring required to copy the configuration of an XP BMS with the Valence configuration software. This BMS is issued from one of my 2 cars and I would like to copy the configuration for the future. Unfortunately, I'm not able to initiate RS485...

I will try to show you pictures of the negative terminal from the inside, I have a battery completely dismantled due to a bad cell. I would not be worried by the damage to the plastic as the negative terminal is bolted on a plate. I attach one unclear picture and will try to get better ones this...

Something is not matching. LFP is 3.65V max, and 4.18/4.2 is lithium ion chemistery. I would be very cautious when doing such a loop, it may happen the inverter is not isolated such as transformerless solar inverter. Regarding the unbalance of your pack, there is definitely a problem with the...

You need to charge each battery individually up to 14.6V, in order to properly balance each cell and reset the SOC. I'm in this exercise with some batteries sitting for a few months and which need to be properly balanced before being connected in parallel. You could also connect all batteries...

I had to test 2 adapters before finding one which work... The one ordered from Aliexpress https://fr.aliexpress.com/item/33025022759.html?spm=a2g0s.9042311.0.0.27426c37UYzDiT was not working...

Were you able to program yourself the Valence BMS software to match your battery setup?

Have you checked the balance of internal cells? It may be, if the battery were kept instorage for too long that internal unbalance prevent the battery to deliver full power... If you have screenshot of the Valence software page it could help.

2 Valence, connected in parallel, are perfectly able to sustain a 150A load, which is 75A per battery...Unless your batteries are completely toasted, which is still an option.

Not exactly...as the positive of a cell is the negative of the next one... The wires are connected like this: -negative of battery which is also negative of cell 1 -positive cell 1which is also negative cell 2 -positive cell2 which is also negative cell 3 -positive cell 3which is also negative...

I was calculating the amp following the 1800W asked by Corbury. 1800W at 12V gives 150A but if you consider battery is more around 13.4 rather than 12V, it lower the AMP around 134A. Having 2 in parallel will gives a C/2 charge on the battery which is no problem.

If you don't mind voiding warranty, you can open the cover and remove Valence BMS borad. You have a plug with 5 wores connected to each cell. You can easily connect any BMS you want!

I have a set of 7 battery in my EV, connected in serie. Discharge rate are going up to 250 A, and batteries have logged a 332A peak. THey seems to hold well. So I suspect 150A continuous are not a problem... And keep in mind batteries are usually around 13.4V, so it is 134A, just around 1C rate.