npole2000

That's OK, the parm i need to read remotely it's the battery SOC (five minutes or even longer is more than enough for my purposes). I found the WiFi module very convenient for the usage... if I'll figure how to get advantage of it. I want to avoid to install an RPi there as I'll add more complexity to the system.

I know, but as I specified in the first post (I don't want to use the local port), that's not what I need to do, as reading the data from the inverter it means using additional hardware, for something that I already have available (I need to make the data available on Internet), unless I can access the inverter IP (wifi interface) someway.

Does anyone know where the inverter data is actually stored/sent? I see there's a set of "frontends", all accessing the same data (DESSMonitor, ESSMonitor.. etc.), but from where they are actually retrieving that data? Is there a unique "master server"? I'm trying to write my own data software, reading the raw data, and I don't won't to use the RS232/USB port, but reading the data already sent to the cloud via WiFi. Thanks.

The only thing that come up to my mind is that the inverter only read the SOC of the master battery (where it is connected) and if this battery won't get discharged it shows always 100%. Are you sure you set the battery addresses as per instructions (usually they have the dip switches to set which is the master and the slaves.

To be honest, the company has been very helpful and in constant contact. I imagine that in a way or another they would have figured the issue, but it would have taken more time (in the end they sent me a new cable to start to solve the issue...). If they wouldn't have replied at all, and left me with the issue, I wouldn't be happy.. and they would have lost a customer (and real money, nor potential... coz after the issue has been solved, I've bought a second battery from them! ).

You know what... after have agreed to receive a new cable for further tests, I watched those videos I found around that are using the same/similar BMS, and I noticed a difference in the address settings, despite they told me to leave it with addr1 (first dip switch ON), looking at those videos and at the documentation of that BMS, for a single battery usage the address should have been 0 (all the dip switches to OFF) as 1 (and others...) are reserved for parallel usage. So I reported this finding to the vendor asking if that could be the issue.. they said to wait for the new cable. But since I'm one of those persons who likes to experiment, I didn't meant to wait and flipped the switch, reset the BMS... and wow, it did connect after few seconds. So it wasn't the cable, it wasn't the protocol compatibility, it was just a wrong settings. I'm so sorry to have wasted your time, without the proper documentation it was hard to figure. Anyway, now I'm happy to have the battery communicating with the inverter, I can read the real SOC, set the % of charge/discharge and all the stuff! Hurra.

Me neither.. never heard that name, until I discovered is one of the biggest BMS brand. Probably they only do things for third parties which uses their name in their custom products. However there's very little documentation if searching for Tian Power specifically. I will wait for this new cable (I don't think it'll make any difference...) and if the vendor doesn't help to solve the issue, I'll start with "sniffing...". Oh and there's an interesting video with my exact panel menus etc (10:25):

Oh finally.. here's my BMS: https://tian-power.com/en/page-40889.html (LT-52 model). I'm unsure if they customized anything in the firmware tho. As I mentioned in the other post, the model number reported by the software is: hs-hes16s48v100lt52 Also, NARADA batteries uses the same type of BMS:

That would be the next step (while the ultimate one would be to place Solar Assistant in the middle.. 😒 ). Yes REVOV uses Tian Power BMS, and as I said in the previous post, their software is identical to mine. I didn't posted the pics, because they are all available on the website, including the connectors side: https://www.basengreenshop.com/48v-lfp-series/basengreen-10kw-wall-mounted-51-2v-200ah-lifepo4-battery-pack-for-solar-energy-storage And part of the screen... sorry I don't have a better one as I'm in another house (attached). I agreed with the vendor to receive a cable made by them... I think they doesn't trust my connecting skills ...I had to accept as they wanted to be sure before proceeding further...

Looking at the software info, it says "TBD Power" and the only reference I found online about it is Tian Power BMS. I downloaded one of their BMS tools and it's almost identical to mine... I'm not sure if it's a rebrand or what.

Thanks! From what did you guessed it...? It couldn't be this? The ports, leds, switches... they matches: https://www.seplos.com/seplos-48v-100a-13s-14s-ncm-15s-16s-lfp-battery-management-system-smart-bms-3.0-for-lifepo4-battery.html

This is the video i sent to them.. if it gives any idea. https://mega.nz/file/MRskiJ5T#_XAFjF2kaxDUWwPx7oLXR8jdfRclOHSuUTpjQebazjY

I have no idea about the BMS, as I believe it's customized, nor I can physically open the battery for obvious reasons (warranty), but I may ask Basen... From the software I only a code in the BMS field: hs-hes16s48v100lt52 Assuming it's really about a bugged implementation, how they didn't figured it out before assembling this packs? Nor that they aren't selling them like hot cakes...

The only thing that I did to verify if there's some sort of activity, it have connected a multimeter to the inverter port pin 3 and 5 and there's voltage fluctuation so something seems to happen... i don't have a serial sniffer, so I dunno what's going on there... nor it's supposed for me to do so, i bought a "battery pack" with the sole purpose of not having to invest time into building one with cells and CMS, to avoid this sort of troubles... ironically!

Yup, not just the manual, but even their direct support, they said to configure the BMS with the "Voltronic" protocol, and the Inverter set to "LiB". Nor that I've just tried that... for the sake of it, I've also tried every other combination, including setting the BMS to "Pylontech" and the inverter to "PYL", but no avail. I've also tried other combinations, like LiC, LiA. Nor that I have many other options to "experiment", the connection they said it must work is just the two cables named "A" and "B" (on the battery RJ45 they are the pins 2 and 1) connected to the pins 5 and 3 ..and that's it. Today I also tried to connect the GND (you never know...), but as expected it didn't make any difference. Today the battery vendor wanted a video showing the connections, I'm not sure how a video would help as they are two wires... but who knows. I still believe it's a protocol compatibility issue.