8 hours ago, Danilo said:

I have already tested and is working fine, no more problems about 90v

Interesting, thanks.

I  see that the code controlling the MPPT is the same as a few other firmwares that I've seen, such as 73.78 for Axpert Max  E11 kW. I had dismissed this as not solving the stuck at 90 V problem, but testing seems to have become muddled with some  weird problems with patched versions of that firmware.

This post reports results for factory firmware version 73.78; now that I look at it again, it seems pretty good to me. When the poster moved his panels around and the MPPT restarted, it did seem to gain an extra 10% or so, so it seems that it's not perfect, but perhaps that's all that can be expected from Voltronics' perturb and observe algorithm. There is a "shelf" with the PV at 90 V, but it's so early in the day that there is hardly any PV current, so increasing the voltage then would have no real effect.

So maybe firmwares like 73.78 and now 82.63 have the best MPPT  algorithm; no need for patching except for those firmwares that  Voltronic haven't ported the new code to.

I'd be very happy to hear any feedback on the above firmwares, good or bad. It may or may not be difficult to port this algorithm to other firmwares; I have to see where the voltage control value is used.

2 hours ago, Coulomb said:

No, Danilo's mcu.hex is for Round/Colour display firmware version 22.21.

Actually, I've not seen 35.xx firmware at all. What Kodak  model is this for?

KODAK OG-10.0

UI8204 MAIN

U23503 SECONDARY

Yellow with round face, colour display and RGB lights.

14 hours ago, LiFePOWER said:

OG-10.0

UI8204 MAIN

This update should be fine for you. Thanks for the details. 

On 2024/05/08 at 5:45 AM, Coulomb said:

This update should be fine for you. Thanks for the details. 

 

Just the main or the secondary as well?

Now to get a USB to serial, just realised I only have USB to RS485 not 232...

Hi Coulomb, could you please created custom fw for max ii 8kw?
Now inverter on 281.05 fw, inverter limit mppt at 4k, I have 2 strings 1st 4680w 419 VOC 354v on max load 13.24 A panels, on the second mppt I have only 2.2k power. Looks like MPPT for models 8kw , 10kw, 11kw the same 90-450v at max power, 500v VOC & max 18A.
Hence for me looks that on 8k model power limited by fw on 4k & for 10-11k model 5k per MPPT
Could you please replace MPPT part from 82.63 to 81.05? In total will not generate mp than 8k, but allow get 700w when sunny

Edited May 11, 20242 yr by denys

On 2024/05/10 at 8:16 PM, LiFePOWER said:

Just the main or the secondary as well?

I've never seen a 35.xx firmware, so unless you have access to an update file, you're stuck with the display firmware that you have.

 

5 hours ago, denys said:

Could you please replace MPPT part from 82.63 to 81.05?

You want me to transplant 10 kW firmware into firmware for an 8 kW model?

You'd have to be sure that the hardware is designed for that power level. Are you that sure?

On top of that, it's likely way more complex than transplanting the main MPPT control functions. I'm not saying no just yet, but at first glance, this seems like a  huge project.

/

 

Edited May 11, 20242 yr by denys

35 minutes ago, Coulomb said:

You want me to transplant 10 kW firmware into firmware for an 8 kW model?

You'd have to be sure that the hardware is designed for that power level. Are you that sure?

On top of that, it's likely way more complex than transplanting the main MPPT control functions. I'm not saying no just yet, but at first glance, this seems like a  huge project.

Now, I am already flashed 82.63, tomorrow I will se how mppt works on this fw tomorrow, now it cloudy, & am sure that it can easy take more than 4k from one mppt, in manual for all these inverters values for voltage & current the same. I want take more than 4 & less 8 from sun in total, & not more that 8  from AC output

Edited May 11, 20242 yr by denys

82.63 fw on 8k model works fine mppt took 5к from mppt1 & 2к from mppt2
My panels setup is only 7k in total & I thinks it is save increase limit from 4 to 5k for mppt 1
Noticed only issue with load values on that fw it report 25-30% more than actual
Now, I am rollback to 281.05.
 Coulomb    It is possible change MPPT1 limit from 4k to 5 k for  281.05 or move mppt part from 82.63 to 81.05?
Also MPPT algoritm on 82.63 works better that in old version & it great.
Thanks,
Denys

10 hours ago, denys said:

 Coulomb    It is possible change MPPT1 limit from 4k to 5 k for  281.05

Maybe one day. So far, that part of the code is opaque to me; I don't even know where to look.

10 hours ago, denys said:

or move mppt part from 82.63 to 81.05?

That's something I'd like to do, except to 81.07 or whatever is latest when I do it. I've just had a look, and now I realise that I need to understand one of the new variables; it may or may not have to vary with the power of the MPPT. Maybe that's the answer to the above, maybe using 82.63's values for one of the variables will automatically give 5 kW max PV power.

But I won't feel comfortable blindly copying code that I don't understand, at least from one rated power to another. So sorry, it will have to wait till I get time to study more fully.

1 hour ago, Coulomb said:

Maybe one day. So far, that part of the code is opaque to me; I don't even know where to look.

That's something I'd like to do, except to 81.07 or whatever is latest when I do it. I've just had a look, and now I realise that I need to understand one of the new variables; it may or may not have to vary with the power of the MPPT. Maybe that's the answer to the above, maybe using 82.63's values for one of the variables will automatically give 5 kW max PV power.

But I won't feel comfortable blindly copying code that I don't understand, at least from one rated power to another. So sorry, it will have to wait till I get time to study more fully.

Thanks, I will waite

Hi all

I have Axpert max 2, 10kW with fw 82.01. Maybe stupid question - Id like to flash fw 82.06 from that thread but why are there other files like *.ini *.bin? I thought that for flashing is used only fw.inv

Thanks for responding

regards Utasek

15 hours ago, utasek said:

why are there other files like *.ini *.bin? I thought that for flashing is used only fw.inv

The .inv file is the hex file with the actual firmware in it. The .bin file is a temporary file. The .ini is used by the reflash tool, should  you choose to use the non-USB method of firmware uploading.

If using the USB firmware uploading section, you have to rename that .ini file after you have copied it to the USB stick; see the firmware upload instructions.

Hi all, yesterday I have flashed fw 82.63, now its cloudy day in our region and MPPT is keeping voltage around 350V while the current is around 0.1A. It seems that 90V bug has been solved finaly

@Coulomb hello, do you had a chance found variable for MPPT power in fw?

On 2024/05/28 at 7:12 PM, denys said:

@Coulomb hello, do you had a chance found variable for MPPT power in fw?

No, sorry. I've been really busy on other things.

On 2024/05/06 at 11:22 PM, Danilo said:

Guys i have just received the new test firmware, is really good news, this is fix the bug regarding the 90v when is Claudy 

Hello Danilo, first of all, thank you for the help in sharing the firmware. I had a problem with my 10Kw Axpert Max inverter. I mistakenly gave it firmware for a different model, causing it to crash and there was no way for it to work again. Speaking of the area. of software and communication, so I had to take it to technical service. I don't know what they did because until now they haven't really told me what they did to the issue. They already did it. It works again, but I am surprised that the installed firmware is the same. (main Firmware CPU00082.01 and secondary CPU Firmware 00022.20) being that from the factory before the problem it had (secondary CPU Firmware 00122.12) apart from that with the firmware that it has now I have a communication problem with the batteries, the inverter does not recognize it, the 90 volt failure and other details, my question is since I see that you made 2 posts, one where the sand reflash file is, and the other remote panel, which of the 2 do I execute and be able to solve this problem
I would appreciate your help in advance.
greetings...

Hi Jose, probably when you upgrade the firmware, something went wrong with comunication between the inverter and pc.

On 2024/05/07 at 5:33 AM, Danilo said:

important.txt 248 B · 25 downloads mcu.hex 411.06 kB · 21 downloads MFC42D.DLL 908.05 kB · 20 downloads MFCN42D.DLL 60.05 kB · 19 downloads MFCO42D.DLL 780.05 kB · 20 downloads MSVCRTD.DLL 376.07 kB · 20 downloads Remote Panel_ReflashTool.exe 180.15 kB · 24 downloads winmm.dll 160 kB · 19 downloads

Hello i'm new on this forum and i'm interresting to update my Axpert II 10kWh with this files. Goal : 90V issues !
But before, i would like to be sure that they are compatible with my device.

Data :
Main CPU : Firmware Version 82.02
Secondary CPU firmware version : 122.12

My question is : this files are compatible with my device ? Someone could me help me ?

It seems that all files are not available. The download start but they are never confirmed... An idea ?

Thank you very much !

regards

Michaël

Edited October 21, 20241 yr by mdaverio

22 hours ago, mdaverio said:

My question is : this files are compatible with my device ? Someone could me help me ?

You  have linked to the  display firmware, with mcu.hex. To fix the stuck at 90 V issue, you need the main (DSP) firmware, with VP5K.hex.

You want main firmware version 82.63; that's the latest available firmware compatible with your inverter that fixes the stuck at 90 V issue.

To  make it easier to find and download, I attach a rar file I found on the internet. I compared the hex files, and they are identical.

 

This is factory firmware version 82.63 for the Axpert Max II 10 kW '28066 non-twin. Do not use with any other model. Use at your own risk.

There are several reports that the MPPT logic in this firmware is the good one, i.e. it has fixed the "stuck at 90 V" issue.

Firmware upload instructions for models with a round display.

82.63 axpert max 2 10kW.rar

Hi there, i have 3 axpert max 10kW. They are on 82.06. The Mppt says 90v-450v and max 500v VOC right? But i connected 9 585W and SA was showing around 400V but at soon as the voltage goes to higher than 400v the inverter goes offline for a few seconds and come back on its own, so i took 1 panel out of the string and now its working fine. Could be a firmware issue?? 

On 2024/10/22 at 4:44 PM, Coulomb said:

You  have linked to the  display firmware, with mcu.hex. To fix the stuck at 90 V issue, you need the main (DSP) firmware, with VP5K.hex.

You want main firmware version 82.63; that's the latest available firmware compatible with your inverter that fixes the stuck at 90 V issue.

To  make it easier to find and download, I attach a rar file I found on the internet. I compared the hex files, and they are identical.

 

This is factory firmware version 82.63 for the Axpert Max II 10 kW '28066 non-twin. Do not use with any other model. Use at your own risk.

There are several reports that the MPPT logic in this firmware is the good one, i.e. it has fixed the "stuck at 90 V" issue.

Firmware upload instructions for models with a round display.

82.63 axpert max 2 10kW.rar 1.4 MB · 2 downloads

 

Hi coulomb,

I have an inverter Axpert max II 10kW (yellow box from SP24), Main version 81.01,  secondary version 122.12 and according to everything I read here this firmware (82.63 from rar file from cited post) should be compatible.

So I tried uploading it using a USB to micro USB cable. Everything went without a problem until the 13th percent where the flash tool got stuck and did not continue. After restarting of the inverter, the display says error 32. I manage to start the firmware upload again by reconnecting the battery and starting the inverter at a right time. The upload starts, but never finish well. The furthest I got was 16% when I reduced the programming speed in the ini file of the flash tool. I tried different PCs and cables. Nothing helped. I just note that the uloading stops after a different amount of data, it depens on used PC and cable.

Can you give me some advice or tip what could cause this problem, what should I try next to upload FW ?

Thank You.

 

 

Edited November 6, 20241 yr by Sliva

5 minutes ago, Sliva said:

Can you give me some advice or tip what could cause this problem, what should I try next to upload FW ?

It's possible that you need a resistor in one of the leads of the RJ-45 to D9 cable, as detailed here. I do mention this towards the end of the upload instructions.

It's also possible that the USB to RS-232 adapter isn't one that the reflash tool works well with. You could try others; the firmware upload instructions mention known-good bands available from South Africa.

Finally, it could possibly be your computer or laptop going to sleep before the reflash process is complete.

I was going to suggest trying the USB stick reflash method; that avoids the RS-232 adapter altogether. But you probably can't get to the reflash by USB menu when the display is showing warning code 32.

Hmm, thank you for fast response. 

First i will try modify serial cable, but until now I was not able to start upload over serial cable. But I have only 3 wire cable, and cable described in this thread have 4 wires plus resitor, so I will fisrt try modify my cable. Maybe it will help. I am trying this with old computer with HW serial port without RS-232 adapter. 

Display is "working" so next step will be OTG usb cable + usb flash, maybe it offer start of update...

I will report progress here.

Thank you for now.