TomasCrespo

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Following Coloumb guess, you should  disconnect your new battery, connect only your 2xUS2000 and charge them at 100%. Then disconnect your 2xUS2000 batteries and connect your 1xUS3000 battery and charge to 100%. Then connect all the batteries.

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Ok, you asked for it 🙂
The main Digital Signal Processor is a TI TMS320 series processor; there are more expensive ones with more RAM and flash, and less expensive ones for the Value Models (VM series). This processor lives on a daughter board in most models (some of the cheapest ones might not have the daughter board). Near the processor is a 14-pin connector for the JTAG interface. The JTAG interface has a USB port, and suitable software on a PC can perform JTAG functions, such as setting a breakpoint, reading or writing the contents of registers, RAM, or flash memory, and so on.
This is mostly intended for debugging, but you can do all sorts of things with it. TI provide a development environment, called Code Composer Studio. It has a code editor, compiler, debugger, all the usual stuff needed for developing code. This program is actually free, if you use the simplest JTAG interface (one that is XDS100 compatible). That's all I need. TI make a development board that has a JTAG interface built in; it costs around US$100. This can be converted into a JTAG interface suitable for talking to the Voltronic Power inverters (basically you add a short 14-pin cable and cut one track). You could also purchase a ready-made JTAG interface, but these typically cost a lot more than US$100. [ Edit: Lately there are many cheaper alternatives from Ebay / Ali Express etc. ]
One of the many things that Code Composer Studio can do is to copy an area of memory to a binary file; that's how you can extract the firmware. But of course, after the first few models, they turned on security. It means that you need to supply a 128-bit "password" before you can access protected memory, and that includes the flash code where the firmware resides. If you don't supply the password, all protected memory reads as zeroes.
So as well as the password, you'd need a JTAG interface, either modified from a TI development board, or a commercial one. You'd also need to download and install Code Composer Studio (it's about a one hour install), get to know how to use it (it has some user interface wrinkles), and plug the JTAG interface between a Windows computer and a suitable inverter. Be careful not to cause a breakpoint at a bad time (hardware could be damaged). It probably helps to know at least a little C2000 assembly language; it takes a bit of getting used to. Extra points for a vague familiarity with the C2000 hardware (e.g. how the GPIO (General Purpose Input/Output) works, EPWM (Extended Pulse Width Modulation) module, etc. Then to actually flash program the original code back into the inverter, you may need to convert the saved binary file to a suitable hex file. I vaguely recall having to swap every second byte to get this to work.
Scared yet? 👻

Version 1.0.0 is the default, the uploader didn't supply a version number. I got 20.59 by reverse engineering the hex file. 
I can't be certain, I'd say there is about a 1% chance of the update not working fully for your machine.
Most unfortunately, no.
I suppose that's possible. Perhaps study those posts and check firmware versions, asking for them if not provided. It would actually be quite valuable to know if it is firmware version related, so if you do this, please post the results.

There is version 20.59 for Axpert VM IIIs on this forum:
https://powerforum.co.za/files/file/25-axpert-vmiii-inverter-firmware/
It might fix your problem. The brand on the box, or who the reseller is, should not matter; it's just paint and a different sticker, the insides should all be the same (although Inverex seem to have models that no other reseller has, so either they are an exception to this rule, or I'm simply wrong).

The beta versions of patched firmware 73.00a are here: LFP,  and other chemistries.
It's split into two posts only because of a problem with multiple attachments and the recently updated forum software.
Ironically, the forum software needs to be patched to host the patched firmware 
 

Hi guys,
so, if you want to check the status of your Pylontech Phantom-S, US2000 or US3000, there's a great diagnostic tool for this called BatteryView.
*DISCLAIMER:
*Please note that with the information written below, you can effectively destroy your batteries, or invalidate your warranty.
*Do what you like, but I take no responsibility for your actions and results.
 
First, you have to create a Serial Console cable, as no such cable comes in the box with the batteries. Here's the wiring:
Plug the RJ-11 connector of the cable into the CONSOLE PORT of the TOP BRICK of you battery stack. Just to be sure, the top brick is the one that have LinkPort0 EMPTY. Next, plug the cable into your laptop's serial port, or USB2Serial adapter. Launch the app and choose the serial port name according to your's laptop configuration. IE COM1, COM2, COM6... Baudrate is 115200. If you have more Pylon bricks stacked, then check the "Parallel" box and select the number of bricks that you have in a single stack. Click OK to connect to the BMS. If you did everything correctly, the app will scan all the bricks and will show you the operational parameters, like cell voltages, current, temperature, SoC... There's a couple more charts available under the "Windows" menu, like Voltage/Amps curve, etc.
Be carefull, as this tool is used also for updating firmware. So, don't screw up your battery...  
For the experts, there's even a possibility to open a CLI, where you can query much more detailed info.
You can SET the values, test the circuits, perform shutdown, etc.
This CLI is so powerfull, that it's actually scary.

Well, if you're not a certified Pylontech expert, don't touch it, please!
 
ATTACHMENT:
BatteryView.zip
 

Hi guys,
couple of months ago, MPP Solar announced the capability of it's inverters (PIP-5048MK, PIP-5048GK and MPI Hybrid) to actively communicate with the Pylontech Low-Voltage batteries US2000 and US3000.
The main thread about the topic on the PowerForum is here: https://powerforum.co.za/topic/2519-mpp-solar-inverters-support-pylontech-some-models/?tab=comments#comment-40801
Since then, couple of people have asked on the forum about the correct pinout of the required RJ-45 BMS cable. So, I purchased a respective kit for MPI Hybrid from the MPP Solar and now we can take a look at it
RS485 BMS Card + cable for MPI-Hybrid:

I received a confirmation from MPP Solar, that the provided cable is compatible not only with MPI Hybrid, but with PIP-5048MK and 5048GK too. The IO card itself is only for MPI Hybrid, as PIP inverters have the BMS RS485 RJ-45 port already embedded.

 
Cable wiring is pretty simple:

Here's the PDF manual for the card:
RS485-Card-Box-for BMS-manual-20180927.pdf
Speaking of PIP, the compatible firmware has a "05 - Pyl" option available in the menu:

 
Here are the respective PIP user guides, which cover how to configure your PIP for use with the Pylontech battery:
http://www.mppsolar.com/manual/PIP-GK/PIP-GK manual-20190201.pdf
http://www.mppsolar.com/manual/PIP-MK (PF1.0)/PIP-MK manual-20190429.pdf
So, if you do believe that your PIP or MPI Hybrid is a newer 2019 unit and already has a firmware with Pylontech support, but you just miss the cable, then you can create a cable yourself and give it a try.

The black one is the one which works. It came with the inverter. It's connected to the RS485 port of Pylontech 
The white one is a CAN bus that came with the Pylontech, I think its for other litium batteries. 
 

Hi again, 
I finally got my inverter replaced 
Now I have one VMIII dated 2018/11/01 but with Pylontech enabled firmware. I can choose Pylon on menu 05.
I making my first tests, but at least now SOC is informed right on LCD screen. 
If you select Pylon in parameter 05 (battery type) some others parameters are not able to modify, like bulk charge or flotation voltage. That's logic, but I don't understand why the parameter "cut-off voltage" is disabled too. I would like to cutoff the battery at an higher voltage. 
So, if someone has any question about an inverter with this firmware, perhaps I could help 

Hi again, 
I finally got my inverter replaced 
Now I have one VMIII dated 2018/11/01 but with Pylontech enabled firmware. I can choose Pylon on menu 05.
I making my first tests, but at least now SOC is informed right on LCD screen. 
If you select Pylon in parameter 05 (battery type) some others parameters are not able to modify, like bulk charge or flotation voltage. That's logic, but I don't understand why the parameter "cut-off voltage" is disabled too. I would like to cutoff the battery at an higher voltage. 
So, if someone has any question about an inverter with this firmware, perhaps I could help 

Hi again, 
I finally got my inverter replaced 
Now I have one VMIII dated 2018/11/01 but with Pylontech enabled firmware. I can choose Pylon on menu 05.
I making my first tests, but at least now SOC is informed right on LCD screen. 
If you select Pylon in parameter 05 (battery type) some others parameters are not able to modify, like bulk charge or flotation voltage. That's logic, but I don't understand why the parameter "cut-off voltage" is disabled too. I would like to cutoff the battery at an higher voltage. 
So, if someone has any question about an inverter with this firmware, perhaps I could help 

I've been speaking with the seller about a firmware update, but finally he has told me that is not only the firmware, there is also some hardware modifications too in the > 2019 February models. 
So, the only solution is send the full inverter for a replacement 
 

The forum is great. Its contents and its user interface. Congratulations 
What forum engine are you using?