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its a neat setup internally so I cannot immagine any wiring issues

That is what I thought and I was looking for someone with some experience to confirm that, many thanks.

I also have two of these still in the box but I see no difference, I need to dismantle one and check how good the sprung-loaded connection is

It's a 204-10E, thanks for your answer and, just as I assumed and in fact after a couple of hours on a slow 5A charger up to 58.4v it restored itself to 100% proving that it was indeed left at over 90% when it happened. I haven't had a chance to change the parameters in order to make it set to...

Many Thanks for your input, I am waiting for two batteries to arrive and I'll do the same

No ESS, and no connection to the grid at all. In all fairness, I only have a couple of low battery warnings recently as can be seen from the images but many DC ripples.

I don't agree, that is like trying to escape from the question. Even if purely for didactical reasons one should try to create an adequate limiter, this is how the world has evolved

I had the same problem when the 16kw battery was not there. Perhaps I should try isolating the 5kw from the system but it makes no scientific sense at all, if one battery was going on its knees for whatever reason, the other one would cover it, especially on such a low demand.

I have two brand new 48V 100Ah LiFePo4 rack mount Battery with Built-in BMS 51.2 V 5.12 Kw but different brand and I would like to use them in parallel after having been fully charged separately. Would it be better to add a BMS in between to control the charge or would the internal ones do the...

Thanks for that, it is confusing because I can see a "48V 15S LiFePo4 200A" and I cannot understand how 15 cells would make 48v. Also 14s at 48v so, are there battery cells other than the classic 3.2 v around ?

Thanks, very interesting discussions on your link however in my case, the problems are multiple but not in combination, I sometimes get a DC ripple, other times a L1 overload and other times low battery warnings even with batteries over 85%. My 16kWh battery is as perfect as it could be, I...

Le me check your drawing please

The low battery alarm is more often not in conjunction with the L1 Overload, only sometimes and only under high load demand.

Thanks for your input, I haven't installed them as yet so I'm not sure what parameters will be available from the two batterie's BMSs, anything in particular that I should be looking out for other than max/min charge-discharge ?

That is correct, and `i also cannot see any difference in the circuit electrically.

Once again many thanks for you confirmation

Yep, it shows a definite over voltage that accord to cell 16, as high as 4.7v but how would this happened I do not understand. Yet minutes later voltages are showing correctly (I double checked each cell V and for resistance too) and only SOC low warning now. No apparent problems with the...

Thanks, Filter Guy just posted the exact example below

What I need to understand first of all is how the Victron Multiplus calculates the overload. Are there any settings contributing to the issue that could I have missed? I could understand this happening on one inverter only but since I added the second one running in parallel I now have 10.000...

No warnings other than Victron shutting of the inverter when it receive the "erroneous" battery SOC. All battery cells torques checked and ok, bit more difficult to check the BMS but it was built only a week ago and it was checked twice then. I had a look at yesterday's graphs and they show that...

So it seemed but minutes later all voltages were back to normal reading and all cells resistance is 0.22/0.24mΩ

It's been fine for weeks now, in isolation or in parallel with a smaller one. Today it was working alone but I wanted to charge the other battery and which showed a similar voltage but when I connected them together the problem started. Never did it happen before

After reading all posts I can only think of one potential solution that would eliminate the need for blocking diodes while still preserving full protection against any reverse/abnormal current and that would be one solenoid disconnecting relay per string controlled by a rather simple voltage...

I have the same brand (DAREN BMS) on my first 100A Odipie Battery pack and it is a nightmare to make it communicate to Victron GX. I have given up and built my 304A pack based on Seplos which works seamlessly with the Victron System

These isolators? Victron have similar ones in its range?

by com port do you mean RS485 or Can Bus Please?

This may sound like a silly question but what if I want to switch (on/off) a remotely installed water heater via wifi instead of wiring the Cerbo GX analogue output normally used for relays? Is there a built-in function or do I have to convert the analog signal to digital?🤔 I'm sure I'm not the...

I am getting a surprising number of L1 overload warnings from my two Victron Multiplus 5000 in parallel system with 20k battery storage. here is an example from yesterday's log: 76 VE.Bus System [276] Overload L1: Warning 2024-04-28 15:01:00 20s The usage at the time was nowhere near any...

I assumed that the ripple was due to incomplete suppression of the alternating waveform after rectification as stated in the technical description so the only way for the BMS to create one would be in the form of PWM . . ? Let me check the voltage at the inverter at the time, that is if the...