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Might be the reason why my brand new PSU blow some days ago. Yes, it was on a test setup with 8s JK

No solution. I have removed it from the system. ??‍♂️

I have not verified with a clamp meter that balancing is actually happening but the app tells me so, and the cell voltage is indeed aligned Boring screen recording of behavior

Thats how it is supposed to work but it isn’t. Even if set to 1v it keeps balancing the pack even if the pack is in complete alignment.

I’m aware that it looks at the average, I’ve watched Andy’s videos on this thing. The issue I see is different and not like the ones in Andy’s videos. As I tried to explain, the StartVol(V) parameter doesn’t work, everything else does. As long as the conditions for EqualizationVol and SleepVol...

I have the original Neey active balancer. The revised HW that have the “0,3v issue” solved. I tested it for the first time today (connecting with IOS GeeWe BMS app). EquVoltage and SleepVoltage seem to work as expected, but the StartVol (eg Voltage Diff) -parameter doesn’t seem to work at all...

Well, might be, but I’m thinking I shouldnt have to go through a work around to get a BMS to start up correctly. It’s obvious it is either inducing noise to the rail by itself or trigger some other part of the system to do it. I’ll try to charge the system with a “normal” charger instead and...

I’ve not shut of the balancing function per se, but the noise is there even when it is not balancing. (Eg when cells are under 3.48v or completely balanced)

The sun was not good enough today, but the Daly have never induced any noise before, I find it highly unlikely that it will suddenly begin at higher power. In both cases the amps are ramped up from zero. The JK begin to make noise as soon as there’s amps, increasing with amount.

Daly BMS connected again, no noise detected… Here’s the comparison

Thanks for the reply. I find it very unlikely that this behaviour wouldn’t have shown itself earlier if the reason for it was disturbance from a device already in this system. I have changed this system a numerous times over the last two years and never encountered any noise like this coming out...

In the recorded scenario the inverter is turned off. It starts with me switching on the circuit breakers for solar panels and when the charge is ramping up the noise appears. It looks like the amplitude is related to the amount of current. The audible noise is solely coming from the Victron...

I installed a brand new JK BMS (4s-8s) in my off grid system yesterday. It is to replace my Daly BMS. After turning on the system there’s noise coming from my Victron Smartshunt. It has been dead silent before. Noise got less when pulling the VE. Direct cable, but it is still present. The noise...

Thank you. Yeah, I'm doing an extensive documentation for the dispute, including capacity testing of all cells. It's a tedious process but I'm not letting this go. I will post the full story and documentation in the near future.

Thanks Steve, you confirmed my suspicion, I will not use it! Regarding the leaking cell, I had no intention of using it! Also I have no intention using this cell where the internals got shifted: ?

I got a horrible delivery from alibaba with banged up cells and in one case a leaking cell. All of this can be blamed for insufficient packing by an unserious supplier. Anyway. One cell has a bent terminal. The internal resistance and voltage of the cell match the other three cells from the same...

Do you know how to disable the sleep time? Set the parameter to zero or?

I think I know what the issue might be… By default the Daly smart BMS has a sleep timeout set to 10 minutes (if I remember correctly). The bms will go to sleep disabling charge/discharge. Since your current draw is so low it will work of the PV’d rather than the battery, and if the battery is...

Nice review you found! What we see to the left is the display of the dummy load. It will display the voltage drop over itself. When there’s no load the voltage displays both show the same. The voltage difference when applying current is most likely the voltage drop over the wire. (Since the...

I've not read through more than seven pages, so someone else might have suggested this. Anyway, to me it looks like the whole pack was shorted. Looking at your first picture, heat seems to have been dissipated at the most negative terminal. If two cells where shorted in the middle of the pack...

Interesting discussion. Great, one more thing to worry about! ? My take on this, is a simple solution as suggested with a relay disconnecting the PV array from the scc. To trigger the relay a vat-4300 shunt can be used. It’s cheap and have a programmable over voltage protection (OVP) feature...

This is my Daly pile of trash. I toasted one, my neighbour the other two. They are extremely sensitive. In two of the cases it was a balance cable that lost its connection. Think it was the negative at one time and a positive the other. The third case was that I dropped a small (signal) cable...

It is 50mA in the new ones, but that is definitely not enough, I agree. I have an active (5A) balance board also, but stopped using it. Seems to me it does more harm than good when you have a top balanced pack.

You can set it to balance during charge over a certain treshold, but the balance current is only 50mA ?

So, new lifepo4-bank and new SMART BMS from Daly, how can this go wrong? According to the sales representative of the lifepo5-cells the lot was matched and balanced. My obvious questions were: A) matched how B) balanced, top or bottom when the reply arrived as A) by voltage B) both I knew...

Off topic but I’ve ordered some stuff from BangGood previously, and they take a different route to tackle “custom fees”. For an additional fee you can “insure” against custom-fees, eg if the goods end up in customs and you are charged, BangGood will reimburse you. A little grayzone maybe ?

Import of lifepo4 cells to Sweden would normally add 4.7% customs fee and 25% VAT. With 1859 USD this equals to ~570 USD according to the customs calculator.... for the rest of EU I think the VAT is 20%. Welcome to Sweden

Edit: The QR code on the cell in the last picture at the DHgate Item leads to “CYGEREEN Ebike Battery Store” at AliExpress. They have no similar cells in their store

Thanks Sajje Compared to Sinopoly SP-LFP300AHA there is a minor difference in Operation Discharge temperature, otherwise the same spec as far as I can see. But the physical appearance is different. Same dimensions but the termInals are placed differently and the number of “cut-ins” on the side...

ok.. Sajjen placed the order 29th of november and expecting it to arrive first half of January. If I order now from DHGate it’s estimated to arrive Jan 15 to Jan 20. AliExpress with UPS; 15-20 days. With standard shipping “before 02/26” (And no tracking). Let me ask my question in a different...

Hi there LIFEPO4 experts! I have a 24v system with a 3Kva all I’m one solar inverter. (EASUN 3Kva24+). It’s a MPPSolar clone. I’m about to upgrade my old lead-acid bank to lifepo4 and found two possible options: 1. Sajjens “find”, 16 BLS 150Ah cells from AliExpress @ 1580$ incl shipping (by...