question

Lithium batteries can be discharged lower without affecting their life, that's what they are designed for.

DVCC is a requirement for these types of setups.

The VRM dashboard sometimes gets confused when refreshing and will sometimes show discharging when it is charging batteries, it just gets out of sync but usually sorts itself out, a page reload resolves immediately - the remote console will show a more accurate view.

Weco isn't on the supported list for Victron, so you really need the supplier to confirm what settings are required and to verify the BMS is operating correctly.

Looks like a wiring issue as well.

@Solarmanu

The lights on the weko (coupled with the charge discharge reverse report) suggest something internally has not been connected right / in transport has disconnected? Thats a supplier related question. But is also related to why the charge discharge indication is backwards.

Is the Cerbo using the battery for the SOC report? I do know many lithium batteries struggle to track SOC with small loads. It may be worth putting a bmv or shuntt based monitor on the system.

Sorry, but given your comments in the first post and that the kit is new, this is one for the installer/victron. Is the installer an official victron dealer/agent? If so they have a support system.

I've lived in Africa. I think I know what you're up against.

Hopefully the importer can help.

What I'd do is get some example wiring diagrams from the Victron website and if the installer didn't leave them, the manuals as well.

I'd collate these into what it should be, based on what connects to what. Match to your symptoms to try and narrow down the search.

I'd then trace the actual wiring and make a diagram. And compare to ecpected. Post it here, Good chance of someone spotting an error.

If this doesn't work, you should be able to pinpoint a component problem.

But as it's apparantly working, could be a simple issue.

@Solarmanu

Looking at the datasheet for the battery that you linked there are several pieces of information I wanted to point out.

The charge current in dvcc should be set down to 60A. Thats the nominal rating for it according the datasheet.

The range of the bms is 46.3v to 57.8v, yours is set in DVCC to 55v but 56.8 on the mppt. (So within the range, that is good.) Not sure what the installer reasoning may be there with the 55v. Does the system charge to the 56.8v? The only issue that there may possibly be is cell balancing. Since I am not familiar with the battery I do not know what voltage balancing begins at and if it is passive balancing or not.

The mppt is set to the preset from victron, which is not ultimately a bad thing. If they have done that on the inverter then no damage will be done to the batteries from a settings standpoint.

The charging discharging information difference may just be a software issue. I am guessing here as I have never used weco. As mentioned it is not a fully supported battery so issues like that can be expected. It might be worth changing out the data cable to check to see if it is the cable or not?

Basically 100% charged should be at 56.8v and then the battery should drop down to float that is set at 54v. If it is doing that then they system is functioning correctly even if it is saying/reporting charge and discharge backwards.

The lowest you should ever discharge your batteries to is 46.3v.

Thanks @Alexandra !

The contractor came so I was waiting to see if they could fix it. They tried a different cable, but still the same issue. It seems there's maybe an issue with the Weco battery itself, which is quite annoying as it's brand new. Now it's only charging to 95%. They're running some tests to confirm this. Will let you know!

It's an official release, the latest one. The technician also tried to get the battery reading from the Multiplus and the charging/discharging was correct.

The people who did the solar setup are now saying that the Weco batteries are not compatible with Victron and that I need to get a different battery (spending more money). I'll make a post about this to warn others...

Hello

Please contact service@wecobatteries.com

The solution is much more simple…. The service team is available 24/h. Please contact us we can support remotely or via video call.

Kind Regards

Thanks for the tip @MarekP and @WeCo-UAE

I was going to write an update.

The technician configured the battery (they hadn't done this) and it's now working fine. I had contacted the Weco commercial service a while ago and was initially told to ask the technician which I did but they struggled to fix it, although it was quite simple... It took a while to get this sorted but it's working fine now.

Glad it's sorted!

I hope the battery will work for a very long time!