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I have EASUN ISolar-SMV-IV-5.6KW with stuck at 120v. Is any chance to obtain mppt fix?

61.01 & 22.20 updated to 61.03  22.21.

I can provide detailed graphs and test it.

Edited December 19, 20241 yr by asav

20 hours ago, asav said:

I have EASUN ISolar-SMV-IV-5.6KW with stuck at 120V. Is there any chance to obtain MPPT fix?

In this case, yes!

61.03 is already the latest in the available 61.xx firmware series. Presumably, that's why you patched to that already.

 

These are patched firmware versions x61.03 for the Axpert VM IV 5.6kW, 3.6kW, or 1.5kW, based on factory firmware version 61.03. Do not use with any other model, not even the later 6 kW and 4 kW models. This firmware attempts to work around the "stuck at 120 V" issue by implementing as many as possible of Georg594's original 90.06 patches. All patched versions fix the premature float patch (properly this time I hope), display a 5 digit firmware version from monitoring software. Use at your own risk.

Patched firmware version 261.03 sets the minimum MPPT voltage at 200V.

Patched firmware version 561.03 sets the minimum MPPT voltage at 150V.

Patched firmware version 861.03 does not implement any MPPT fixes, only fixes the premature float bug and the QVFW version number.

dsp_original_61.03 is the original unpatched factory firmware version 61.03, in case you want to revert for whatever reason.

dsp x61.03 patched VM IV 5.6kW 3.6kW 1.5kW.zip

Edited December 20, 20241 yr by Coulomb
Attached the zip file. Sigh.

2 hours ago, Coulomb said:

These are patched firmware versions x61.03

Where can I download it?

Just now, asav said:

Where can I download it?

Sorry! In the post above; I attached the zip file now. Duh!

72.68 older version supports battery SOC value. (HAX_HV_8k 72.68.7z ) 
The starting PV voltage is 120V. It's a very cloudy day. Successful breakout. It doesn't stick.
The loss is small.

The inverter display shows the SOC, but the dessmonitor and Viewpower show the voltage  12 (back to utility), 13 (back to battery), and 29 (low battery cut-off voltage)

The serial number is displayed correctly. 
No error
Help board supply solar connector remove

Which one is true? (Display VS PC Monitoring)

Is it worth changing both MPPTs to 0.25A?

 

 

 

MAX_HV_8k 72.68.7z

Edited December 20, 20241 yr by Tomeek

On 2024/12/21 at 3:50 AM, Tomeek said:

72.68 older version supports battery SOC value. (HAX_HV_8k 72.68.7z ) 

Interesting, I didn't know that. The newer version also called 72.68 does NOT support it. I wonder if the older version supports it properly? The older version may be an experimental one that was not meant for general release. Maybe one day I'll get to time to understand how the QDOP command actually works.

On 2024/12/21 at 3:50 AM, Tomeek said:

Help board supply solar connector remove

I don't understand this sentence.

On 2024/12/21 at 3:50 AM, Tomeek said:

Which one is true? (Display VS PC Monitoring)

I really don't know, sorry. The monitoring software might not have caught on to the use of % in some cases but not others. But then again experimental firmware might not be implementing QDOP properly.

What display (U2) firmware are you running? That might not be talking correctly to the RS-232 port, which might be confusing the monitoring software.

On 2024/12/21 at 3:50 AM, Tomeek said:

Is it worth changing both MPPTs to 0.25A?

How do you intend on doing that? Considering that only the old 72.68 (not the new one) and 72.72 have the QDOP support, and neither of these is patched so far.

Edited December 26, 20241 yr by Coulomb

Works fine. I tried it, the display values work (SOC). It does not transfer the SOC value to the monitoring software, the previous one remains there: Volt.
No problem.

 

Display Firmware: 12.21

Helper PSU board PV connector removed

 

Do you think it makes sense to modify both MPPT PV current thresholds to 0.25A? or should I stay with the factory version?
The loss is small..

Edited December 21, 20241 yr by Tomeek

I have been testing firmware 372.66 for 5 days, and for me, there has been almost no change from 272.66

Since the exposure of my 2 strings is the same, the impact of such granularity is beyond what I'm able to measure with Solar Assistant.

Attached are 2 screenshots from 2 similar days on each of the firmware (Sorry, the weather hasn't been good lately in Brittany, France)

Basically, since the abandonment of forcing a fixed voltage like on firmware 92.06 at 200V, which, if I remember correctly, reduced it the most, the 90V blocking effect in the morning and evening is still quite pronounced.

Anyway, I'm a bit lost because personally, I can't concretely translate the impact of different patch threshold values on current and voltage just by observing the curves.

I have the vague impression, perhaps incorrectly, that the threshold value only applies to the descent, and even then, I'm not sure.

In any case, once again, a big thank you for your work! The premature float bug fix is invaluable

PS : 272.66 is the first and 372.66 is the second

Edited December 23, 20241 yr by sharkut

I don't think it's entirely good to play with amps either.
The voltage will be the right solution. For me, for example, the 120V factory versions

(72.62,  72.68 (old version)) do not stick or only rarely.

A 150V start would be about ideal for everyone..

 

 

Edited December 24, 20241 yr by Tomeek

On 2024/12/25 at 1:37 AM, Tomeek said:

I don't think it's entirely good to play with amps either.
The voltage will be the right solution. For me, for example, the 120V factory versions

Interesting, thank you for your comments.

Unfortunately, this is at odds with what I was hoping was leading to a consensus on what the best MPPT algorithm is.

Oh well, hopefully a pattern will emerge soon.

Ciao ho questo inverter in foto con 5 panelli 400W su MPPT1 e 5 panelli 400w MPPT2

ho il problema dei 90V, ho provato Firmware postati nei messaggi precedenti ma inverter non li accetta 

i firmware ora sono questi:

U1 46.05

U2  22.12

come posso risolvere grazie

On 2025/01/05 at 6:29 AM, Ale70 said:

Ciao ho questo inverter in foto con 5 panelli 400W su MPPT1 e 5 panelli 400w MPPT2

ho il problema dei 90V, ho provato Firmware postati nei messaggi precedenti ma inverter non li accetta 

i firmware ora sono questi:

U1 46.05

U2  22.12

come posso risolvere grazie

 

Hi I have this inverter in the photo with 5 400W panels on MPPT1 and 5 400W panels on MPPT2

I have the 90V problem, I tried the Firmware posted in previous messages but the inverter does not accept them

The firmwares now are these:

U1 46.05

U2 22.12

How can I solve it thanks

Please post in English on this forum.

It's hard to say what's going on with your clone. It seems to be running a Voltronic Max E firmware, but it's clearly a Max II. Any genuine unmodified Voltronic 46.xx firmware should accept the 90.06 based patched firmwares.

Which patched firmwares have you tried?

A few clones can't accept any firmware updates, but that was a long time ago; cloning technology has advanced a lot since then.

Here's my guess: The clone is using a Max E firmware (designed for removable displays) because Max II firmware was not publicly available until 2023. This clone is made in 2022, if they follow the Voltronic serial number convention. They may or may not have changed the firmware; if they changed the reflash command, then you will not be able to use standard Voltronic software, patched or factory. If this is the case, you will have to get new firmware from your supplier (good luck with that). If they have a version based on say 46.71, then this will largely fix the stuck at 90 V issue.

There is also the chance that you are not updating correctly. Are you using a USB to serial adapter? If so, what brand/model? There are many that simply don't work with the Voltronic reflash tools. Can you post the error message from when the reflash failed?

Il 06/01/2025 alle 02:07, Coulomb ha detto:

Si prega di postare in inglese su questo forum.

È difficile dire cosa sta succedendo al tuo clone. Sembra che stia eseguendo un firmware Voltronic Max E, ma è chiaramente un Max II. Qualsiasi firmware Voltronic 46.xx autentico e non dovrebbe essere modificato accettare i firmware patchati basati su 90.06.

Quali firmware patchati hai provato?

Alcuni cloni non possono accettare alcun aggiornamento del firmware, ma questo è successo tanto tempo fa; da allora la tecnologia di clonazione ha fatto molti progressi.

Ecco la mia ipotesi: il clone utilizza un firmware Max E (progettato per display rimovibili) perché il firmware Max II non era disponibile al pubblico fino al 2023. Questo clone è stato realizzato nel 2022, se seguono la convenzione del numero di serie Voltronic. Potrebbero aver modificato o meno il firmware; se hanno modificato il comando reflash, non sarai in grado di utilizzare il software Voltronic standard, patchato o di fabbrica. In questo caso, dovrai ottenere un nuovo firmware dal tuo fornitore (buona fortuna). Se hanno una versione basata su, diciamo, 46.71, allora questo risolverà in gran parte il problema del blocco a 90 V.

C'è anche la possibilità che non stai aggiornando correttamente. Stai utilizzando un adattatore USB-seriale? Se sì, che marca/modello? Ce ne sono molti che semplicemente non funzionano con gli strumenti di reflash Voltronic. Puoi postare il messaggio di errore da quando il reflash non è riuscito?

Ciao, scusa se ho scritto in italiano, oggi ho provato ad installare il firmware che allego nella foto ma purtroppo non ha funzionato, ho utilizzato un cavo micro USB

 

Edited January 7, 20251 yr by Ale70

16 hours ago, Ale70 said:

Ciao, scusa se ho scritto in italiano, oggi ho provato ad installare il firmware che allego nella foto ma purtroppo non ha funzionato, ho utilizzato un cavo micro USB

Don't do it! 

usb-RS232 cable is required!

Attached is the description for the update

Firmware Upgrade SOP via RS232.docx

38 minutes ago, Tomeek said:

Don't do it! 

usb-RS232 cable is required!

I used to believe that, but the models with '28066 processors have a newer reflash tool that has the USB option as shown above. My understanding is that with a suitable cable (e.g. USB-A to micro-USB), you can use this option and it should communicate directly with the micro-USB port in the removable display or the inverter. I've never done this, and I'm quite hazy about how it would work, but I believe that some readers on this forum have reported success.

That zip file has had some 85 downloads, so if there is a problem with it, we should well and truly have heard about it by now.

@Ale70, you have posted in Italian again. Even your quote of my post comes out in Italian. Please sort this out.

Are you sure that your inverter has a '28066 DSP? The best way to know is to check the presently working main (U1, DSP) firmware version. Note that the 9x.xx firmware versions are all over the place. If your present firmware is 72.xx or 91.04, then you have this processor. Otherwise, please report what you have.

This very version would be fine for me by both MPPT current thresholds would you modify 0.3A

Supports battery soc settings. There was only a little 120V in the morning and evening

 

Can you do it if you have time? @Coulomb

MAX_HV_8k 72.68.7z

Edited January 17, 20251 yr by Tomeek

20 hours ago, Tomeek said:

Can you do it if you have time?

I've been avoiding this one, as it doesn't have the "presumed good" MPPT logic, and 72.66 does (and I have a patched version of that). But maybe they have fixed the MPPT logic some other way now. I need to study this, sorry.

On 2025/01/08 at 3:03 PM, Coulomb said:

I used to believe that, but the models with '28066 processors have a newer reflash tool that has the USB option as shown above. My understanding is that with a suitable cable (e.g. USB-A to micro-USB), you can use this option and it should communicate directly with the micro-USB port in the removable display or the inverter. I've never done this, and I'm quite hazy about how it would work, but I believe that some readers on this forum have reported success.

That zip file has had some 85 downloads, so if there is a problem with it, we should well and truly have heard about it by now.

@Ale70, you have posted in Italian again. Even your quote of my post comes out in Italian. Please sort this out.

Are you sure that your inverter has a '28066 DSP? The best way to know is to check the presently working main (U1, DSP) firmware version. Note that the 9x.xx firmware versions are all over the place. If your present firmware is 72.xx or 91.04, then you have this processor. Otherwise, please report what you have.

Hi I bought a new usb - rs232 cable and I managed to upgrade from U1 4605 to 4671, do you recommend I try a more recent and performing firmware?
thanks for the help

On 2025/01/30 at 6:42 AM, Ale70 said:

I managed to upgrade from U1 4605 to 4671, do you recommend I try a more recent and performing firmware?

That  firmware (46.71) is about two years old, though it does have the "presumed good" MPPT logic that some later firmwares lack.

But the "presumed good" logic is back in 46.82, dated October 2023, so that's the one to go to if you want the latest available that doesn't have the "stuck at 90 V" issue too badly. I'm not aware of any particular issues with 46.71.

On 2024/12/15 at 10:30 PM, Artur said:

If you check the marking of the mppt board, it coincides between the 8 and 11 kilowatt versions.  check the low-voltage transistors on the battery and they match.  .  The only difference is in the marking of the sine cut transistors.   It's just that I have a 5-kilowatt solar field, and in the 8-kilowatt version, the limit is exactly 4,000 watts.  Therefore, if someone asks for 8 by 11, write.

8kwt аксіома працює на прошивці від 10квт моделі, але значення які видає інвертор при навантаженні не відповідали реальним і були завищені, але по сонцю 5квт інвертор вибирав.

https://powerforum.co.za/topic/24190-new-firmware-for-axpert-max-ii-10kw/page/2/#findComment-203572

Edited February 5, 20251 yr by denys

On 2025/01/31 at 2:31 AM, Coulomb said:

That  firmware (46.71) is about two years old, though it does have the "presumed good" MPPT logic that some later firmwares lack.

But the "presumed good" logic is back in 46.82, dated October 2023, so that's the one to go to if you want the latest available that doesn't have the "stuck at 90 V" issue too badly. I'm not aware of any particular issues with 46.71.

Thanks, then I will try to update to 46.82

On 2024/12/13 at 1:22 PM, Coulomb said:

If not permanent, it would mean that the serial number is not stored at the same address in the EEPROM in versions 72.72. I'm surprised that 72.72 behaves differently to 72.74; at first glance, they seem to be using the same addresses.

I've been investigating this issue. It seems that there are several versions of "data layout" for  the various firmwares. I've been concentrating on Max firmwares for now, as these seem to have more issues with EEPROM layout (e.g. losing serial number, bad battery voltage calibration, etc).

It looks like the thing that varies the most, yet is fairly easy to find in a new firmware, is the size of the configuration partition. Here are some numbers, in firmware version, partition size pairs:

90.06, 148

72.72, 152

72.74, 148

73.76, 148  Extended partitions

73.78, 148

11.05, 154

11.06, 154

As you can see, 72.72 and  72.74 have different sizes! It looks like the odd one out is 72.74. I somehow got the impression that  73.76 was different to other 73.xx, but the partition sizes and starting addresses are the same. 73.76 does have extra checking, as well as several new areas not used by other firmwares. Maybe it means that updating from 73.76 to 73.78 is OK, but not the other way (as the extended data will not be present).

So at this stage, don't attempt to update from 72.72 to other 72.xx, or other 72.xx to 72.72.

I guess the next step is to figure out what 73.76 is doing with the extra partitions.

 

Hi. I have an Axpert Max 8000 inverter with extractable display purchased in June 2022 on solarpower24. The fw is U1 72.02 and U2 112.14.

I would like to solve the 90v bug and have control of the return to the grid via soc to read the data sent by the latest JK bms.

I have already purchased the rs232-usb interface.

From what I understand I should install dsp 272.66 patched Max II 8kW 28066 but I would not like it to be obsolete.

Which firmware do you recommend I install?

Thank you.

On 3/3/2025 at 10:15 AM, CarecaIII said:

I would like to solve the 90v bug and have control of the return to the grid via soc to read the data sent by the latest JK bms.

Does the JK BMS talk a protocol that the inverter or monitoring software understand?

I'm unclear on whether the inverter can operate on SoC% if the inverter is not connected directly to the battery's BMS.

In any case, unfortunately 72.66 and its patched versions do not have the required support for SoC%. Several firmwares after 72.66 no longer have the "presumed good" MPPT logic. Factory firmware version 72.75 (the latest I know of, July 2024) has both. I have not patched 72.75. So I'd say that your best bet is to try 72.75 first. Some people report good MPPT behaviour with the "presumed good" logic, others prefer patched firmware. 72.75 is available here. However, note that the poster reports SoC% as not working. I have no idea why. I'd like to research this, but time is not available at present.