64.62 its the last version.

Coulomb has not patched any firmware for max twin 11kw?
Coulomb please can you help us?

 

Coulomb has not patched any firmware for max twin 11kw?

I've done 78.07 for the Axpert Max E 11 kW Twin 28066, but you have the '2809.

I've also patched 64.62, not for the MPPT issue, from back when there was no 78.xx available, trying to turn it into a '28066 version.

I'll try and find some time to do 62.62 for the MPPT issue.

 

Hi Coulomb, I have a Voltronic Axpert max twin 11kw, the current version is 64.07.
Which version of yours should I install to solve the 90v problem?

You should use patched firmware version 264.62, which I've just written (see next post).

 

Do you have the original version (64.07) so I can go back?

I usually don't have the exact firmware that a user happens to have installed from the factory. However, in this case, I do:

MAX11K_TWIN_DSP_6407.7z

At the end of this post is patched firmware version 264.62, based on factory firmware version 64.62 for the Axpert Max E 11 kW Twin and the '2809 DSP chip. I note that there was a .rar file released where the final conversion to hex file was not created properly, so the update file actually would have flashed to an earlier version. Fortunately, I was able to correct this; for reference, the corrected original factory firmware update file (now in a zip archive) is here:

64.62＿ISOLAR SMW 11KW TWIN recovered.zip

The patched firmware implements all of Georg594's original patches, although one patch (for each MPPT, so two total) could not be exactly applied. I've applied it as best I can "in the spirit" of the original patch. It also fixes the premature float bug, and changes the version number reported by monitoring software to 264.62. The removable display will still show 64.62 (i.e. U1 64 62). The current threshold is changed from 0.50 A to 0.05 A, and the minimum MPPT operating voltage is changed from 90 V to 200 V.

Do not use with any other model, not even the Axpert Max E 11 kW Twin with '28066 DSP chip (but there is a separate patched firmware for that combination). Use at your own risk.

Firmware upload instructions for models with a removable display.

This is the patched firmware (with the original included as dsp_original.hex):

dsp_264.62 patched_200V.zip

It will be ok if my 2x( 7x405W) pannels works at 200V ? If they go to 190V it will stay in bug ? Because my pannels when i have lets say 3500-4000W in home they can produce 4000W but at 185V. It will be a problem with this ? 

 

 

 

Edited October 2, 20232 yr by vladsuciu

 

It will be ok if my 2x( 7x405W) panels works at 200V ? If they go to 190V it will stay in bug ?

This is one of the reasons that I didn't want to put in a specific minimum MPPT voltage, but it seemed that putting in all the patches seems to be best, and I thought surely 200 V would not restrict anyone.

Your panels must be quite unusual for 7S of them to produce maximum power at 190 V (that's an average of 27 V per panel).

My understanding is that you won't "stay stuck", rather the panels will only get "dragged down" to 200 V, instead of all the way down to 90 V. You might still find that this produces more power than you're getting now; your panels might be ending up in a "false maximum" power point due to some shadowing or a similar issue.

But if you find that you end up losing power like this, it's very little trouble (now that everything is set up and worked out) to produce another patched firmware that uses say 150 V minimum MPPT voltage.

It will be great for me if you can do that think with 150V . My panels are 37V Voc and when it goes in full throtle they go lower than 32V ( nominal V its 32.2V) . I will be greatfull if you can do it for people who have string in low Voltage. I will put the original 64.62 till you can modify this one , because i think its better than 64.61. The 64.62 have power from 0.5A wich i have very fast bcs my pannels have 27A the 2 string together.

 

Alla fine di questo post è presente la versione firmware patch 264.62, basata sulla versione firmware di fabbrica 64.62 per l'Axpert Max E 11 kW Twin e il chip DSP '2809. Noto che è stato rilasciato un file .rar in cui la conversione finale in file esadecimale non è stata creata correttamente, quindi il file di aggiornamento in realtà sarebbe passato a una versione precedente. Fortunatamente, sono riuscito a correggerlo; per riferimento, il file di aggiornamento del firmware di fabbrica originale corretto (ora in un archivio zip) è qui:

64.62＿ISOLAR SMW 11KW TWIN recuperato.zip 1,49MB · 

Il firmware patchato implementa tutte le patch originali del Georg594, anche se non è stato possibile applicare esattamente una patch (per ogni MPPT, quindi dovuta in totale). L'ho applicato nel miglior modo possibile "nello spirito" della patch originale. Risolvi inoltre il bug prematuro del float e modifica il numero della versione riportata dal software di monitoraggio in 264.62. Il display rimovibile mostrerà ancora 64.62 (cioè U1 64 62). La soglia di corrente viene modificata da 0,50 A a 0,05 A e la tensione operativa minima dell'MPPT viene modificata da 90 V a 200 V.

Non utilizzare con nessun altro modello, nemmeno con l'Axpert Max E 11 kW Twin con chip DSP '28066 (ma è disponibile una patch firmware separata per quella combinazione). Utilizzare un proprio rischio.

Istruzioni per il caricamento del firmware per i modelli con display rimovibile.

Questo è il firmware patchato (con l'originale incluso come dsp_original.hex):

dsp_264.62 patchato_200V.zip 1,77 MB · 

Thank you very much

 

[ vladsuciu ]It will be great for me if you can do that thing with 150V . My panels are 37V Voc and when it goes in full throttle they go lower than 32V ( nominal V its 32.2V) .

Huh, OK. I'm used to 200 W 72-cell panels; shows how old my system is getting 🙂  And of course how much solar panel technology has progressed.

 

[ Coulomb ] ... It's very little trouble (now that everything is set up and worked out) to produce another patched firmware that uses say 150 V minimum MPPT voltage.

Having said that, I'd better produce the goods.

This file contains patched firmware version 164.62 for the Axpert Max E 11 kW Twin '2809, but with a LOW MINIMUM MPPT VOLTAGE of 150 V. This will suit owners who happen to have MPPT strings whose nominal total Voc is less than about 250 V. For MOST USERS, they should CONTINUE TO USE VERSION 264.62, which is also contained in the zip file below, but dsp.hex (what the reflash tool will be using) is a copy of version 164.62 (150 V variant) when initially unzipped. So if you think you might want to use the 150 V variant at some point, you might consider grabbing a copy of the below. I have put a readme file into the zip file explaining the various files and what to do to swap between them. Owners with the '28066 DSP chip get the Arena reflash tool, which allows you to pick the firmware file you want by name, saving the tedium of deleting, copying, and renaming with the Windows explorer. But when you have the '2809 processor, as the patches in this post muat be used with, you have to use the old reflash tool that has a fixed file name that it looks for (always named dsp.hex).

The patched firmwares implement all of Georg594's original patches, although one patch (for each MPPT, so two total) could not be exactly applied. I've applied it as best I can "in the spirit" of the original patch. It also fixes the premature float bug, and changes the version number reported by monitoring software to 164.62 or 264.62 as appropriate. The removable display will still show 64.62 (i.e. U1 64 62). The current threshold is changed from 0.50 A to 0.05 A, and the minimum MPPT operating voltage is changed from 90 V to 150 V or 200 V (depending on the variant, 164.62 or 264.62 respectively).

Do not use with any other model, not even the Axpert Max E 11 kW Twin with '28066 DSP chip (but there is a separate patched firmware for that combination). Use at your own risk.

Firmware upload instructions for models with a removable display.

This is file with the two patched firmwares. Without any delete/copy/rename, you can use the reflash tool immediately and it will flash version 164.62 (150 V variant):

dsp_164.62_264.62_patched_150V_200V.zip

 

Edited October 3, 20232 yr by Coulomb
More wordage about the fixed file name dsp.hex.

Thanks coulomb. You are the best. People from Romania are grateful for your work. 

Hi vladsuciu, have you had the opportunity to check the functioning of the firmware?

I haven't had a chance yet, I'll try when I get home.

I will put tomorow the 64.62 150V 0.05A new patched. The 64.62 original is not ok for my 230V panels. 

 

Hi. Now i updgrade my firmware. 

I just rar all on desktop and use reflashtool. Everything is ok. Now i see its 164.62 , only on the display of inverter is still 64.62. 

Thanks coulomb. All the best for you.

 

Edit : in the future if i will put on the other mppt pvs who will have 360-380V it will be a problem if i will stay with 164.62?  Ty

Edited October 4, 20232 yr by vladsuciu

Thanks @Coulomb . You are the best. This morning the mppt starts with 79V at 7:29 and in 30 minutes my mppt is working in 200V. Your patch is the best. Im very grateful. All the best for you.

Edited October 5, 20232 yr by vladsuciu

Perfect!! thank you very much!!

@Coulomb I don't know if it's a possible request, but would it be possible to change the battery charging from AC, in steps of 5Ah, instead of 10Ah?

On 2023/10/23 at 7:35 PM, jos89 said:

I don't know if it's a possible request, but would it be possible to change the battery charging from AC, in steps of 5Ah, instead of 10Ah?

I assume you mean changing the maximum utility charge current setting from 10 A steps to 5 A steps. No, this is not a feasible change. The main problem is that when inverters are paralleled or configured for 3-phase operation or both, they pass around their setting compressed into 8-byte CAN bus messages, and there aren't enough bits to allow for double the number of possible settings.

On 24/10/2023 at 16:52, Coulomb said:

Presumo che tu intenda modificare l'impostazione della corrente di carica massima dell'utilità da incrementi di 10 A a incrementi di 5 A. No, questo non è un cambiamento fattibile. Il problema principale è che quando gli inverter sono collegati in parallelo o configurati per il funzionamento trifase o entrambi, le loro impostazioni vengono trasmesse compresse in messaggi CAN bus da 8 byte e non ci sono abbastanza bit per consentire il doppio del numero di impostazioni possibili.

I only have 1 inverter, single phase. I would like to recharge from AC, at 5A steps, because I have an ongrid system at the voltronic input. To make the most of the surplus, 5A would be optimal

On 2023/10/03 at 6:21 AM, Coulomb said:

Huh, OK. I'm used to 200 W 72-cell panels; shows how old my system is getting 🙂  And of course how much solar panel technology has progressed.

Having said that, I'd better produce the goods.

This file contains patched firmware version 164.62 for the Axpert Max E 11 kW Twin '2809, but with a LOW MINIMUM MPPT VOLTAGE of 150 V. This will suit owners who happen to have MPPT strings whose nominal total Voc is less than about 250 V. For MOST USERS, they should CONTINUE TO USE VERSION 264.62, which is also contained in the zip file below, but dsp.hex (what the reflash tool will be using) is a copy of version 164.62 (150 V variant) when initially unzipped. So if you think you might want to use the 150 V variant at some point, you might consider grabbing a copy of the below. I have put a readme file into the zip file explaining the various files and what to do to swap between them. Owners with the '28066 DSP chip get the Arena reflash tool, which allows you to pick the firmware file you want by name, saving the tedium of deleting, copying, and renaming with the Windows explorer. But when you have the '2809 processor, as the patches in this post muat be used with, you have to use the old reflash tool that has a fixed file name that it looks for (always named dsp.hex).

The patched firmwares implement all of Georg594's original patches, although one patch (for each MPPT, so two total) could not be exactly applied. I've applied it as best I can "in the spirit" of the original patch. It also fixes the premature float bug, and changes the version number reported by monitoring software to 164.62 or 264.62 as appropriate. The removable display will still show 64.62 (i.e. U1 64 62). The current threshold is changed from 0.50 A to 0.05 A, and the minimum MPPT operating voltage is changed from 90 V to 150 V or 200 V (depending on the variant, 164.62 or 264.62 respectively).

Do not use with any other model, not even the Axpert Max E 11 kW Twin with '28066 DSP chip (but there is a separate patched firmware for that combination). Use at your own risk.

Firmware upload instructions for models with a removable display.

This is file with the two patched firmwares. Without any delete/copy/rename, you can use the reflash tool immediately and it will flash version 164.62 (150 V variant):

dsp_164.62_264.62_patched_150V_200V.zip 1.88 MB · 14 downloads

 

Hello Coulomb,

One question: 

I have EAsun 11kw Twin inverter with:

main CPU 64.07, secondary 38.06

My PV1 string Vmp is 126V, PV2 strings Vmp is 211V 

In theory i could double PV1 string voltage to Vmp 252V (via reconnecting the panels).

What would be the best choice for the FW selection (150/200) in order to meet the 150/200V minimum MPPT voltage criteria? Ideally i would keep current Voltages @126V/211V.

Thanks 

Jozef

 

23 hours ago, kissjoe said:

In theory i could double PV1 string voltage to Vmp 252V (via reconnecting the panels).

I imagine that you would get better low-light performance if you did that re-configuration. But it's hard to know if it would be worth the effort.

23 hours ago, kissjoe said:

What would be the best choice for the FW selection (150/200)

You could definitely be better off with the 150 V version, it seems to me. Though experimentation would be the only way to be sure.

8 hours ago, Coulomb said:

I imagine that you would get better low-light performance if you did that re-configuration. But it's hard to know if it would be worth the effort.

You could definitely be better off with the 150 V version, it seems to me. Though experimentation would be the only way to be sure.

Thanks,

today was very bad weather - ideal for testing...

Started with the 200V-FW. PV2 string (Vmp 211V) worked fine, but PV1 (Vmp 126V) was really bad giving only 50W max. 

After switch onto 150V FW i saw PV1 was jumped a bit - but it was end of the day. 

Anyhow i switched the FV1 Vmp to 250V - So it should be OK now.

 

Is there any meaningfull update for the secondary CPU as well? (current 38.06)

Thanks a lot.

Jozef

 

9 hours ago, kissjoe said:

Is there any meaningful update for the secondary CPU as well? (current 38.06)

There is a slightly higher version display firmware, version 38.11, available here.

Unless you are having trouble with BMS communications, you probably won't see any benefit.

On 2023/11/04 at 5:51 AM, Coulomb said:

There is a slightly higher version display firmware, version 38.11, available here.

Unless you are having trouble with BMS communications, you probably won't see any benefit.

It was really weird yesterday... full sunshine and the mppt was giving strange peaks from 2kW it was jumping randomly to 0W on both strings. voltges / currents were changing continously with sometimes higer voltages than the Vmp of the strings... really weird.  I tried to switch to the 200V FW and results was the same. 

Than i moved to the stock 64.62 and the peak power changed to stable 2/1kW -seems stable.

My system with the non indentical strings seems does not like the custom FW-s. It may generate higher W at low light but i loose the peak W at normal condition...

My current PV1 has Vmp 250V polycrystal (2.3kWpeak)  and PV2 has 210V monocrystal (4.5kWpeak). 

1 hour ago, kissjoe said:

It was really weird yesterday... full sunshine and the mppt was giving strange peaks from 2kW it was jumping randomly to 0W on both strings.

Interesting. That sounds like the "dips" that Axpert King firmware used to exhibit, but eventually fixed by Voltronic at about version 71.94. But I don't see how this could be related, unless it's caused by a very high level control system.

1 hour ago, kissjoe said:

My system with the non identical strings seems does not like the custom FW-s.

Thanks for the feedback; all feedback is good. It will be interesting to see if this only happens with different power strings.

Alas, I don't know how to proceed from here, since I don't have a MAX to debug with. Dreaming up things to try and having readers try them out doesn't seem practical. But maybe we can learn something from the pattern of users that do and don't replicate this.

30 minutes ago, Coulomb said:

Interesting. That sounds like the "dips" that Axpert King firmware used to exhibit, but eventually fixed by Voltronic at about version 71.94. But I don't see how this could be related, unless it's caused by a very high level control system.

Thanks for the feedback; all feedback is good. It will be interesting to see if this only happens with different power strings.

Alas, I don't know how to proceed from here, since I don't have a MAX to debug with. Dreaming up things to try and having readers try them out doesn't seem practical. But maybe we can learn something from the pattern of users that do and don't replicate this.

No issue at all!
If there is any need for “testing” just let me know.

I have on touch one more separate mppt so i could remove on string from the MAX. In that case i could still try to run the upgraded FW on just one single string. That would i assume reduce overall noise on MAX as a secondary benefit.

Cheers

Jozef

Hi,

I would like to ask for some help in setting our inverter (Voltronic Axpert Max II TWIN, 11KW). Here are some of the settings:

 

* output source priority: SBU

* battery type: user

* Bulk charging voltage: 58,4

* Float charging voltage: 54

* charging sourse priority: SNU (solar + utility)

* back to grid voltage: 48

* back to discharge voltage: 51

 

It worked fine on Sunday, but since it switched to line mode in the evening, it stayed there since. For somehow it doesnt want to go back to battery mode. Is there a setting we should look at or change? Unfortunately, who set it up left us with no help whatsoever... Many thanks to anyone who could help us.