The two files attached here in this post are copied from the FTP folder named exactly "VMIII 4K TWIN". Although, other folders for the exact same model have different version numbers for both DSP and MCU, so I had to write this note down here for later reference as it sounds very interesting! @Coulomb

Remote Panel_Reflash_MCU(57.16).rar VM TWIN DSP_7103.7z

Edited October 23, 20241 yr by Tarek Yag

On 2024/09/29 at 12:46 AM, esmail-kassir said:

2- does this firmware has quite fans ? As I fOund that 60.95 and 60.87 much noisy that 60.76

It was noted early in this thread by @AMalakani that quiet fans logic was introduced in two distinct speed sets, you can search back his replies. However I recall he went with the higher speed logic for better cooling, which is a better practice for electronics if you don't mind the higher fan noise!

On 2024/10/03 at 4:41 PM, Coulomb said:

My wild guess is that they wanted a "very different" firmware version number for a "very special" firmware modification. I don't believe that it has anything to do with your inverter's branding.

I can totally agree with you on this. I guess this "very special" modification was the AC2 switching logic which is described earlier in this thread in the following post:

https://powerforum.co.za/topic/29708-axpert-firmware-collection-for-vm-iii-and-vm-iv-twin-models-only/?do=findComment&comment=209834

It seems like they don't want this "special" modification to enter the main production line firmware, yet!

On 2024/10/03 at 4:41 PM, Coulomb said:

60.10 also looks much like the others. It's a non-experimental version, so it gets a minor version number (10) that is < 60.

It's becoming more and more likely that this is the general case in their versioning logic!

On 2024/10/06 at 10:15 AM, Fawad said:

i have check and adjusted the 42 an 43 settings, basically without these setting inverter during day time when solar is avaialbe inverter  turn on the Earth and Reverse light in utility meter, its not feeding the electricity to the grid still its TURN ON the Led of reverse and on utility meter , i have adjusted both these setting now the LED is off , its good feature indeed!

Thank you very much for your clarification. I was the first one here to see these two settings in my inverter when I updated my inverter while testing some new version that I can't recall right now. However, there were no documentation for these two settings at all back then!

On 2024/10/03 at 5:51 PM, AMalakani said:

Does the VM VI with the round display has icons for those alerts?

I'll try to find an answer when I upgrade both my DSP and MCU firmware in a short while.

Edited October 23, 20241 yr by Tarek Yag

On 2024/10/16 at 6:29 AM, Eddie1 said:

This guide says I should disconnect everything and keep only battery connected, while the document provided with the update file by voltronic says I should disconnect everything but keep ac connected

On 2024/10/16 at 4:57 PM, AMalakani said:

You can update the firmware with both AC and Battery connected, just completely turn off the solar power and the loads.

On 2024/10/17 at 3:47 AM, Eddie1 said:

can I update both dsp and mcu on battery only without ac connected? because ac is not stable and gets cut randomly.

In any case, I can confirm that my VM IV TWIN always disconnects PV and AC OUT right at the beginning of every DSP reflash. So, practically at least, whatever you have connected the DSP will disconnect what it doesn't need. The main concept here is to have a stable and reliable power input, which is preferably a battery for sure!

Edited October 23, 20241 yr by Tarek Yag

On 2024/10/17 at 3:47 AM, Eddie1 said:

current fw is 71.01 and the one they sent is 71.03

As you have DSP version 71.01 right now, it's totally logical that they pointed you to the 71.03 version, and from what I'm starting to believe right now, you need the 57.xx MCU firmware. Because these versions are what I found linked to each other in the official firmware folders available in the earlier shared FTP link.

Would you please confirm what's the original MCU firmware version that came with your inverter on purchase?

@Khalil Koja Would you please confirm what was the original DSP firmware version before any updates?

I think I just found out the firmware difference for "push button" and "touch button" models of VM III ??? @Coulomb

On 2024/10/19 at 3:44 PM, Eddie1 said:

I'm trying to update using usb-a to micro-usb cable becuse I dont have rs-232 to usb cable
but each time I connect the cable windows says it cant recognize the device, also watchpower cant detect the inverter
in the guide voltronic sent me. it stated that I can update using micro usb

Edit: I think I won't be able to update mcu using USB method even if it worked for dsp

MCU firmware were never updatable via USB, as of now at least! You must use a USB to RS232 converter to update your MCU firmware.

However, it is possible to update DSP firmware via a USB cable with selecting the "USB" port option in the reflash tool, which is already documented in @Coulomb's firmware update instructions. It is also possible to update DSP via USB OTG, and of course USB to RS232.

Edited October 24, 20241 yr by Tarek Yag

22 hours ago, ahmad almawal said:

I have this device VMIV TWIN 4.2KW every period of time it restores factory settings

Please provide as much details as you can, and preferably a photo of your inverter's sticker so that we can better help you. For privacy purposes, you can wipe out or blur the last 6 digits of your inverter's serial number.

Edited October 23, 20241 yr by Tarek Yag

16 hours ago, bratpit said:

So CV level  practically  not exist in my inverter .

So I guess we are 3 users now having this issue.

@WallK could you please confirm that you mean your inverter never exceeds the float voltage while charging? And for sure we're waiting your answers to Coulomb's earlier questions

Another important question for me, have you ever repaired your inverter or had previous hardware faults?

Edited October 23, 20241 yr by Tarek Yag

4 hours ago, Tarek Yag said:

So I guess we are 3 users now having this issue.

@WallK could you please confirm that you mean your inverter never exceeds the float voltage while charging? And for sure we're waiting your answers to Coulomb's earlier questions

Another important question for me, have you ever repaired your inverter or had previous hardware faults?

No repairs, no errors.

I bought it in SolarPower24 at the beginning 2023.

@ahmad almawal, I'm sorry to let you know that from the sticker photo you shared, it's obvious that you have a clone of a Voltronic inverter, not a genuine one! We can't help with clones as they mostly have modified components, and fail with official firmware updates because they mostly have a modified firmware since manufacturing, and most importantly, they're known to have a lot of issues and failures.

I just hope you didn't try to reflash it using any official firmware posted around.

I did not make any modifications to the program.

I have some devices that have this problem but not like this one.

@ahmad almawal, please reply in a single post next time. I posted today several posts as they're directed towards different members and specifics and I was absent for a long while too.

We always recommend never trying to reflash a clone inverter as it may brick your inverter. Try referring to your seller if they could do anything to assist you with your issues.

You can also refer to the following post for known clues about clone Voltronic inverters:

Do I Own a Clone? - Posted by Coulomb

Edited October 23, 20241 yr by Tarek Yag

On 2024/10/23 at 2:31 PM, Tarek Yag said:

Although, other folders for the exact same model have different version numbers for both DSP and MCU, so I had to write this note down here for later reference as it sounds very interesting!

It sounds to me like a lot of work for Coulomb 😭

23 hours ago, Tarek Yag said:

I think I just found out the firmware difference for "push button" and "touch button" models of VM III ???

Ah! That makes some sense. I think I can tell by the small number of "keys" or "buttons" accessed by the firmware.

11 hours ago, Tarek Yag said:

I'm sorry to let you know that from the sticker photo you shared, it's obvious that you have a clone of a Voltronic inverter, not a genuine one!

I'm not 100% sure. Yes, the sticker is strange, but some brands seem to have a deal with Voltronic that gives them an extra 200 W of rated power, e.g. Inverex.

But it's certainly possible that this is a clone, and they inflate the rated power by 200 W because they believe that this seems to be safe, and makes their product look better than the competition.

On 2024/10/03 at 5:51 PM, AMalakani said:

Btw, this 60.10 firmware doesn't have the low-speed fan feature

Damit! I wish I paid more attention to your test note here. I just tried DSP firmware 60.10 and yes, it has no quiet fans logic! So, I had to immediately reflash to DSP 60.87, and again, no quiet fans logic!!! So, I ended up reverting back to the unpatched DSP 60.95 version

Ah, and I was shocked that DSP 60.87 didn't recognize my VM IV Twin as a 24v 4kW unit. It recognized it instead as a 48v 6kW unit!!! I quickly did a factory reset and a power cycle, but it didn't fix this. Thankfully, it didn't brick due to insufficient input battery voltage, and I rushed to reflash it immediately. @Coulomb ??!!!!!

Additionally, I upgraded from MCU 39.26 to the latest 39.27, no notes here. But I noticed that it didn't show programs 42 and 43. I guess I need to have a DSP firmware that enables these two settings in the display.

On 2024/10/03 at 5:51 PM, AMalakani said:

Does the VM VI with the round display has icons for those alerts?

No, not at all. Attached here is the complete display layout showing all possible icons. Taken from my VM IV Twin User Manual, it's the same for the Twin and Non-Twin variants.

Edited October 24, 20241 yr by Tarek Yag

1 hour ago, Tarek Yag said:

it has no quiet fans logic! So,

Try mine 

it is 60.76 , the best fan logic among all version but for some reason no one want to even try it LOL

I am using it since Aug and everything looks great. 

VM3.hex

Edited October 24, 20241 yr by esmail-kassir
Uploading the hex file

6 minutes ago, esmail-kassir said:

it is 60.76 , the best fan logic among all version but for some reason no one want to even try it LOL

I cannot believe that I've never noticed this version number anywhere. Thank you for grabbing my attention to it. Could you please point me to the original full firmware package where you obtained it?

On 8/28/2024 at 11:53 PM, Tarek Yag said:

 @Coulomb what a massive mind-blowing number! Good for you, man!

It is not considered a fault in the VMs too, a warning only, and it shows in apps too.

Doesn't change anything for the VMs, just the beep sound.

He's asking you to upload the complete .ZIP file of the firmware you uploaded, not the .HEX file alone.

we have discussed this version earlier me , you and Coulomb .

 

I recall I reed a post for Coulomb said that firmware timeline is : 60.87 60.95 60.89 60.06 60.76 60.05 60.74 60.04  60.66 60.90

anyway the most quite fans is 60.76 (almost You cant hear it unless the temp sensor Triger high fan speed or the load is very high )

 

Thank you! I can see why both me and Coulomb disregarded this version. We didn't find the official full package of it, so we couldn't make sure where it's coming from, at least from a cyber security perspective. We shouldn't be trusting lonely HEX files, and that's why I converted all my HEX files to compressed packages with much more info included.

I'll surely try again to find the full package! And I might also use the HEX file you provided for my own testing.

Edited October 24, 20241 yr by Tarek Yag

36 minutes ago, Tarek Yag said:

Thank you! I can see why both me and Coulomb disregarded this version. We didn't find the official full package of it, so we couldn't make sure where it's coming from, at least from a cyber security perspective. We shouldn't be trusting lonely HEX files, and that's why I converted all my HEX files to compressed packages with much more info included.

I'll surely try again to find the full package! And I might also use the HEX file you provided for my own testing.

As far as I recall, I got it from the local brand ‘Wings’ maintenance. Excuse my poor memory, as I was trying many versions back then

PS : my inverter is “Triple A” not “Wings”

Could you contact "Wings" again and ask them for the full firmware package?