Hi all

Im a newbie here, so in case that I have opened topic which have been discussed here sorry for redudant theme but I couldnot find much info about my Axpert Max II, 10kw - probably its not so widespread model yet. My inverter is original one.

I have same problem like other colleagues - during summer time invertor has been working great(from the morning till the end of daylight) but now in the fall(cloudy weather etc) Im struggling with issue that invertor is showing around 90V on both strings. When I will turn off output power(by pressing the button under the big display)  and that turn that back on the value of PV1 and PV2 voltage sudenly increase to 350V and invertor is starting to produce much more power from solar. It will be probably same firmware bug like on previous versions

Does anyone have patched firmware for my invertor type?

Many thanks for responses

regards

Ludvik

 

Edited November 30, 20223 yr by utasek

82.xx isn't one I've seen. Why do they have 10 kW and 11 kW models? Maybe the Max II only goes to 10 kW for some weird reason. [ Edit: More likely, it was the lower power "toe in the water" model, like the 7.2 kW Max that was replaced by an 8 kW Max. ]

So we can't patch it if we don't have a firmware update file for it.

BTW, I suspect that this 90 V bug goes way back to to the first Axpert MKS II (though back then the minimum MPPT voltage was higher, perhaps 100 V or even 120 V, so slightly less severe).

Edited October 5, 20232 yr by Coulomb

Do I understand that correctly that for patching you would need to get current firmware 82.xx from my Axpert in order to be modified? Is there any way how to do that?

thank you

Ludvik

14 hours ago, utasek said:

for patching you would need to get current firmware 82.xx from my Axpert in order to be modified? Is there any way how to do that?

No. There is a way to do that with a JTAG device, but it requires a password.

But we can work with the hex file that comes in a firmware update file.

Fortunately, a 10 kW Max II firmware has become available. Unfortunately, it's not an 82.xx version. So now we need to know what processor you have, a '2809 or a '28066. The available firmware  firmware (version 90.01) is for a '2809. I'll think about how I can solve that. If you are prepared to open up your case (requires cutting the date sticker, possibly voiding warranty) then it's fairly easy.

5 hours ago, Coulomb said:

So now we need to know what processor you have, a '2809 or a '28066.

Duh. It seems that at least here, there is brick prevention. So you can just try main firmware for Axpert Max 10 kW version 90.01, and if it's not compatible, it will just ignore the reflash attempt.

Many thanx for your attitude and effort, appreciated. Im gonna open inverter and than check type of proc. and let you know. I will also try to upload version 90.01. I dont take care of warranty, the whole my solar system is joy

Best regards from Czech

Ludvik

 

7 hours ago, utasek said:

Im gonna open inverter and than check type of proc.

Ok, no need to take off the label over the processor; just check how many voltage regulators there are:

The bottom photo is from a VM(?) model with a '28062, but the same principle (one Voltage Regulator) should apply to control boards with a '28066.

Edited November 27, 20223 yr by Coulomb

On 2022/11/27 at 12:52 PM, Coulomb said:

Duh. It seems that at least here, there is brick prevention. So you can just try main firmware for Axpert Max 10 kW version 90.01, and if it's not compatible, it will just ignore the reflash attempt.

May I kindly ask you to share link for Axpert Max 10kW vs 90.01 once again? I dont know why but cannot open that at all.

Many thanks

Regards

Ludvik

18 hours ago, Coulomb said:

Ok, no need to take off the label over the processor; just check how many voltage regulators there are:

The bottom photo is from a VM(?) model with a '28062, but the same principle (one Voltage Regulator) should apply to control boards with a '28066.

I have check that and my PCB contains only 1xVR like on the bottom picture

22 hours ago, utasek said:

May I kindly ask you to share link for Axpert Max 10kW vs 90.01 once again? I dont know why but cannot open that at all.

Yes, it seems to require logging in now; it didn't earlier. I suspect that they aren't supposed to make it easy for anyone to download firmware.

Fortunately, I downloaded everything that was new on that site, about 5 firmwares if memory serves.

Alas, this firmware is for the '2809 processor, which has the two Voltage Regulators. So it would seem that it's the wrong one for you, unfortunately. It looks like 80.xx are for the newer '28066 processor. [ Edit: or at least 80.01. ]

So close!

Here it is anyway:

 

Edited November 29, 20223 yr by Coulomb

14 hours ago, Coulomb said:

Yes, it seems to require logging in now; it didn't earlier. I suspect that they aren't supposed to make it easy for anyone to download firmware.

Fortunately, I downloaded everything that was new on that site, about 5 firmwares if memory serves.

Alas, this firmware is for the '2809 processor, which has the two Voltage Regulators. So it would seem that it's the wrong one for you, unfortunately. It looks like 80.xx are for the newer '28066 processor. [ Edit: or at least 80.01. ]

So close!

Here it is anyway:

 

Many thanks for sharing. Today I will try to flash and let you know result.

On 2022/11/29 at 4:26 PM, Coulomb said:

Yes, it seems to require logging in now; it didn't earlier. I suspect that they aren't supposed to make it easy for anyone to download firmware.

Fortunately, I downloaded everything that was new on that site, about 5 firmwares if memory serves.

Alas, this firmware is for the '2809 processor, which has the two Voltage Regulators. So it would seem that it's the wrong one for you, unfortunately. It looks like 80.xx are for the newer '28066 processor. [ Edit: or at least 80.01. ]

So close!

Here it is anyway:

 

Hello Coulomb. Although my Axpert Max II contains 28066 processor are you sure that in case of incompatibility of FW the flashing process of 90.01 via refleshtool will not cause bricked system due to brick prevention? Im gonna do that asap but Id also to be sure tha I will not brick that 

9 hours ago, utasek said:

Although my Axpert Max II contains 28066 processor are you sure that in case of incompatibility of FW the flashing process of 90.01 via refleshtool will not cause bricked system due to brick prevention?

It's impossible to be totally sure, unless we had an 82.xx firmware to examine. It relies on the firmware you have now not having the BDR96 command. Every '28066 firmware I've seen (which is only about 4 so far) has not had that command, and has had the C28066 command instead. So I'd say I'm 98% sure that nothing will happen.

But then, that means I'm 98% sure that nothing will happen (bad or good) if you try this. The chances that something will happen and that that something is good, is very small.

So sadly, I can't recommend trying it.

4 hours ago, Coulomb said:

It's impossible to be totally sure, unless we had an 82.xx firmware to examine. It relies on the firmware you have now not having the BDR96 command. Every '28066 firmware I've seen (which is only about 4 so far) has not had that command, and has had the C28066 command instead. So I'd say I'm 98% sure that nothing will happen.

But then, that means I'm 98% sure that nothing will happen (bad or good) if you try this. The chances that something will happen and that that something is good, is very small.

So sadly, I can't recommend trying it.

Thank you for clarification, I will do that and let keep you informed

2 hours ago, utasek said:

Thank you for clarification, I will do that and let keep you informed

So, I have tried to flash 90.01 fw but I was not succeeded. I have choosen right port(COM4), turned on Axpert, disconnected PV and turn on output voltage, than start flashing but after confirmation that Im sure to flash on display appeared info about fw upgrade and nothing had happened. I couldnot confirm YES message on display by any button - they did not react. Any recommendation how to confirm flashing? 

Thank you for responding

Hi all,

I am running several SP24 Axpert Max II 10K
https://www.solarpower24.it/negozio/inverter-en/off-grid-inverters/primo-max-en/sp24-axpert-max-ii-10k-48-10000-watt-48-volt-inverter-off-grid-solar-island/?lang=en

The latest firmware I received from the dealer is 56.05 (see files).

The "90V problem" annoys me a lot, it now leads to possibly 60% less PV energy in winter...
I am trying to get voltronicpower to react via my dealer. I received help like this with an earlier problem.

If I can help in this place in any way, I will try.

Greetings from northern Germany

OG-10 DPS Reflash_5605.7z Remote Panel_Reflash_MCU(22.20).rar

I had forgotten the internal model designation and rating information:

QMN
(MKS2-10000
QGMN
(049
QVFW
(VERFW:00056.05
QVFW3
(VERFW:00022.20
QPIRI
(230.0 43.4 230.0 50.0 43.4 10000 10000 48.0 47.0 45.0 53.2 53.2 2 002 140 1 2 3 9 01 0 2 49.0 0 1 480 0 000

3 hours ago, utasek said:

Any recommendation how to confirm flashing? 

It looks like the expected behaviour is confirmed: you have a '28066, and this is '2809 firmware, so it's not letting you overwrite the firmware.

So you'll have to ask your supplier for a firmware update, or wait till one is published.

3 hours ago, Volker said:

The latest firmware I received from the dealer is 56.05 (see files).

Thanks! Though as usual I'm confused about the firmware version numbering. There is already 56.04 for Axpert King rack mounted 3 kW firmware. Looks like 82.xx is for '28066 processors, and this 56.05 is for '2809 processors, all being Axpert Max II 10kW.

I wonder if 10 kW is the new 11 kW? In other words. perhaps they found that 11 kW was pushing the limits too hard, and they will all now be 10 kW.

3 hours ago, Volker said:

The "90V problem" annoys me a lot, it now leads to possibly 60% less PV energy in winter...

Yikes. So that's hardly negligible.

I'm having a bit of patch fatigue (laziness?), and I have this theory that maybe we don't need all of Georg's patches, and maybe the current threshold to stop clamping is really all we need. So as a compromise, I've patched 56.05 with only one "stuck at 90 V" change, and only to MPPT1. That allows comparison with MPPT2, for those that have similar PV arrays connected to MPPT1 and MPPT2. Or you could disconnect the array from MPPT1 and connect it to MPPT2, and the weather hopefully changes little in the 5 minutes to make that change safely.

If I'm wrong, I'll do the full patch set. If I'm right, I'll just patch MPPT2 the same way. Either way, this will be a temporary patch.

Quote

If I can help in this place in any way, I will try.

Please test this patched firmware, and if possible, compare performance of MPPT1 and MPPT2 on a cloudy or otherwise poor PV day.

 

2 hours ago, Coulomb said:

It looks like the expected behaviour is confirmed: you have a '28066, and this is '2809 firmware, so it's not letting you overwrite the firmware.

So you'll have to ask your supplier for a firmware update, or wait till one is published.

Thank you. I have asked him 2times, but without reaction. Maybe he is workign on my request:) But many thanks for your effort

Hi Coulomb,

I've only been following the big product zoo for a year!
So the 10k version is older (CE test was July 2021). It was derived for two or more resellers from the 8K version with exactly the same external design (round display) (stronger FETs installed??). In recent months voltronicpower has made several 11k models from this model (Acpert MAX II 11k as well as 11k Duplex and Twin).
https://voltronicpower.com/en-US/Product/PV-Inverter/Off-Grid-Inverter.

Many thanks for the file. I hope to be able to test tomorrow....
I would be interested to know where and who you patch *). I want to be sure that the devices are not damaged. Perhaps one should also treat the information discreetly...

*) To explain my interest: 30 to 35 years ago I did a lot of assembler programming myself (only 8 bit CPUs) - from private projects like a radio clock to professional things (a whole operating system with reloadable programs that are linked to the addresses only when loading with debugger and reassambler and several very complex measuring devices). Larger Turbo Pascal projects followed, then I changed: development management and management. So I only let others do the programming...
Today, when I need a simple solution for pump and heating control in the private sector, I use a suitable Arduino. Not so spectacular...

Best regards

1 hour ago, Volker said:

Hi Coulomb,

I've only been following the big product zoo for a year!
So the 10k version is older (CE test was July 2021). It was derived for two or more resellers from the 8K version with exactly the same external design (round display) (stronger FETs installed??). In recent months voltronicpower has made several 11k models from this model (Acpert MAX II 11k as well as 11k Duplex and Twin).
https://voltronicpower.com/en-US/Product/PV-Inverter/Off-Grid-Inverter.

Many thanks for the file. I hope to be able to test tomorrow....
I would be interested to know where and who you patch *). I want to be sure that the devices are not damaged. Perhaps one should also treat the information discreetly...

*) To explain my interest: 30 to 35 years ago I did a lot of assembler programming myself (only 8 bit CPUs) - from private projects like a radio clock to professional things (a whole operating system with reloadable programs that are linked to the addresses only when loading with debugger and reassambler and several very complex measuring devices). Larger Turbo Pascal projects followed, then I changed: development management and management. So I only let others do the programming...
Today, when I need a simple solution for pump and heating control in the private sector, I use a suitable Arduino. Not so spectacular...

Best regards

dsp 256.05 patched.txt

The information in the file says it all. But I also know that the source code is necessary for this. I guess you have a disasembler and a lot of time for the job!?

This is the control board (lowres, it's from the AXPERT MAX II 8KW Service manual)

5 hours ago, Volker said:

This is the control board (... it's from the AXPERT MAX II 8KW Service manual)

The problem is that with the semiconductor shortage, they might replace the '2809 with the '28066 with its different control board, and not update the service manual.

I see that the '2809 is still active (still being manufactured), but is now Not Recommended for New Designs. That might also be part of it.

From what you were saying, it sounds like I got it backwards, and the 10 kW was the cautious precursor to the 11 kW. So the 10 kW models are all older ones, so most of them would have '2809 processors. Poor @utasek seems to be the exception 🥺. He might have one of the few machines that switched to the new processor just before the 10 kW model changed to 11 kW.

18 hours ago, Volker said:

Hi all,

I am running several SP24 Axpert Max II 10K
https://www.solarpower24.it/negozio/inverter-en/off-grid-inverters/primo-max-en/sp24-axpert-max-ii-10k-48-10000-watt-48-volt-inverter-off-grid-solar-island/?lang=en

The latest firmware I received from the dealer is 56.05 (see files).

The "90V problem" annoys me a lot, it now leads to possibly 60% less PV energy in winter...
I am trying to get voltronicpower to react via my dealer. I received help like this with an earlier problem.

If I can help in this place in any way, I will try.

Greetings from northern Germany

OG-10 DPS Reflash_5605.7z 1.02 MB · 2 downloads Remote Panel_Reflash_MCU(22.20).rar 873.14 kB · 2 downloads

I have same one but with white covers - now this model is out of stock, that seems that the colour of boxes could probably define DPS version. Still waiting for response from cercastock.it related to fw. - I have urged that but they are doing "dead bug"