Hi all,

I have a 5kw Axpert king working with 5x US2000 "C" version batteries and the system is monitored through a PC with Watchpower.

Everything seems to work fine but there is a small issue.

On the Axpert screen, I can see the group of batteries but no info about the number of batteries is displayed. Batteries are connected through RS485 port to the Axpert.

U1 FW version is 71.97

U2 FW version is 2.61

Watchpower PC is connected to the RS232 port of the inverter and I can read all battery parameters (SOC, voltage, charge current, etc) so, it seems BMS is communicating with the Axpert. Also, the battery icon is blinking on the Axpert screen, indicating battery comm is ok.

I must say that I have seen the warning 69 on the Axpert sometimes, when the batteries are 100% full.

Any ideas?

Edited February 7, 20223 yr by Mauritius B
Battery stack pic.

All the dip switches are set correctly?  I'm no expert but I assume they use some kind of bus where each dip switch indicates the unique id for the device so they don't collide when they need to communicate.  With one device possible designated the master and coordinating the communication.

If that is def. correct I would say my faith in Axpert isn't very high, so if your battery is set to PYL in the configuration, then maybe it is "working the way it should". (aka half assed like the rest of the Axpert software; and I say this owning an Axpert King)

12 hours ago, Gnome said:

All the dip switches are set correctly?  I'm no expert but I assume they use some kind of bus where each dip switch indicates the unique id for the device so they don't collide when they need to communicate.  With one device possible designated the master and coordinating the communication.

If that is def. correct I would say my faith in Axpert isn't very high, so if your battery is set to PYL in the configuration, then maybe it is "working the way it should". (aka half assed like the rest of the Axpert software; and I say this owning an Axpert King)

Thank you Gnome.

The dip switches are set correctly according to what I found on manuals and internet but, I have also tried different combinations.

The axpert is configured in the Pyl mode and as I mentioned, everything seems to work properly. I think it is just a slight communications protocol change or a bug due to the "C" battery version.

Let's see if any of the software gurus in the forum have any idea.

22 hours ago, Mauritius B said:

no info about the number of batteries is displayed.

There is a flag that has to be set for that info to appear; it is set on receipt of the response to a "61" command. Maybe the protocol is slightly different with the latest Pylontechs, I have no idea.

22 hours ago, Mauritius B said:

I have seen the warning 69 on the Axpert sometimes, when the batteries are 100% full.

This is normal, it just means that charging is disabled because the battery is full. But this warning is so unpopular that they ripped it out completely in the later display firmwares. 02.61 is a bit old now; I'm sure you can download 02.66 or later from this forum in the files section. It might even fix your "number of packs" display problem.

8 hours ago, Coulomb said:

There is a flag that has to be set for that info to appear; it is set on receipt of the response to a "61" command. Maybe the protocol is slightly different with the latest Pylontechs, I have no idea.

This is normal, it just means that charging is disabled because the battery is full. But this warning is so unpopular that they ripped it out completely in the later display firmwares. 02.61 is a bit old now; I'm sure you can download 02.66 or later from this forum in the files section. It might even fix your "number of packs" display problem.

Thank you Coulomb.

I think you are right and there is something new/different in the protocol for version "C".

I had the firmware 2.66 already downloaded but I have not updated the Axpert yet. I will try.

It is a bit scary cause the whole house is powered from the axpert in hybrid mode and I don't want to brick it (and listen to my wife afterwards... 😀)

I think you should change the emplacement of the cable to the axpert king. On your pylontech master battery communication cable is in port B/RS485 on your photo, but this should be the A/CAN port. Although axpert king works with RS485, the pylontech manual says to use A/CAN to communicate in RS485 mode. Confusing for sure!

Hope this helps!

On your battery photo i see also one set of terminal cables going to your inverter. So one terminal red +  cable and one terminal black - cable. These cables are designed for 100A current, with 5 batteries you have a maximum working current of 125A. So my advice is to install a extra set of cables to your inverter, easy to install in the spare places you have on your batteries. 

On 2022/02/12 at 11:23 AM, Pieke said:

I think you should change the emplacement of the cable to the axpert king. On your pylontech master battery communication cable is in port B/RS485 on your photo, but this should be the A/CAN port. Although axpert king works with RS485, the pylontech manual says to use A/CAN to communicate in RS485 mode. Confusing for sure!

Hope this helps!

 

On 2022/02/12 at 11:34 AM, Pieke said:

On your battery photo i see also one set of terminal cables going to your inverter. So one terminal red +  cable and one terminal black - cable. These cables are designed for 100A current, with 5 batteries you have a maximum working current of 125A. So my advice is to install a extra set of cables to your inverter, easy to install in the spare places you have on your batteries. 

Thank you Pieke.

I will have a look on the communication protocols and the port as you suggested. The strange thing is that communication between axpert and pylon seems to be ok except for the parameter I mentioned.

Regarding the cables. I am not reaching the current limit in the normal daily use. I have never seen the load over 50% unless I have forced it on purpose. Maybe I will consider adding another extra pair, just in case. My intention with the battery system is having extended back-up time, not drawing high power from it.

Edited February 14, 20223 yr by Mauritius B

For me this did the trick, using the port A/CAN. Before i did not see my two stacks of pylontech batteries! You always can give it a try.

7 hours ago, Pieke said:

For me this did the trick, using the port A/CAN. Before i did not see my two stacks of pylontech batteries! You always can give it a try.

Can you share the pinout of your communication cable?

Merci.

I finally updated the display FW to version 2.66 (2.66a patched) and the warning 69 dissappeared but the display info for batteries is still missing.

2 hours ago, Mauritius B said:

the display info for batteries is still missing.

Thanks, noted. No promises, but when I finally get back to King firmware, I'll see if I can find and fix this. Perhaps it will be a snail's race between me and Voltronic 🥱🐌🦥

18 hours ago, Coulomb said:

Thanks, noted. No promises, but when I finally get back to King firmware, I'll see if I can find and fix this. Perhaps it will be a snail's race between me and Voltronic 🥱🐌🦥

Thank you for your continuous support to the forum!! 👍