5kw clone inverter with 50.01 U1 

This inverter works flawlessly, just want to get 11kw to same level 

16 hours ago, Solar shed said:

Anyone else had this issue.

Yes, anyone who has tried patched firmware version 291.70, please report your findings, good, bad, or otherwise.

It would be good to rule out a hardware issue with @Solar shed's particular unit.

When I get a chance, I'll check the patch, I am slowly zeroing in on the "right way" to do this.

Edited August 20, 20232 yr by Coulomb

Hello.
I have a Max 11kw (pip8048) with 8 560w panels connected in series.
I noticed that the mmpt controller never raised the current above 11A for 3 months. Although the panels are capable of delivering more than 14A. And on the previous inverter, subjectively, I got more. Is it possible that this is a software limitation?

17 hours ago, sergeyshadow said:

I noticed that the mmpt controller never raised the current above 11A for 3 months. Although the panels are capable of delivering more than 14A. ... Is it possible that this is a software limitation?

Possible, but unlikely. The 8 kW manual I happen to have open says 18 A max PV panel current, peer MPPT. I can't imagine that the 11 kW models would have a lower current limit.

Usually, apart from brief moments (of the order of 10-60 seconds) after a cloud passes, panels provide a maximum of about 75-80% of rated power. So you might not get much more than 80% of the rated 14 A, and 0.8 x 14 = 11.2 A. Maybe you just thought you got more from your previous inverter.

What is the NOCT (Normal Operating CondiTion) Imp?

It could be some sort of firmware bug, rather than a deliberate limitation. What version of main (U1) firmware are you running?

  In another topic:

On 2023/08/22 at 4:06 PM, add1c7ed55 said:

72.66 is more stable but not solved the 90v problem. If u can modify is super.

This is Axpert Max 8kW main firmware version 272.66, based on factory firmware version 72.66, for the Axpert Max E 8 kW non-twin. It is for use with the Arena reflash tool and using the C28066 reflash command.
This patch uses only the two current compare changes, not affecting minimum MPPT voltage at all.
It changes the MPPT current threshold from 50 (0.50A) to 5 (0.05A). It also fixes the premature float bug and changes the version number. Do not use with any other model; your existing firmware must be 72.xx, 91.04, or 92.04.

Use at your own risk; I am not able to test on an actual inverter. Firmware upload instructions.

[ Edit: The patched firmware zip file name incorrectly states the model as a Max II; it is in fact a Max E, with removable display. Sorry for any confusion caused. ]

dsp 272.66 patched Max II 8kW 28066.zip

Edited December 27, 20232 yr by Coulomb

1 hour ago, Coulomb said:

Possible, but unlikely. The 8 kW manual I happen to have open says 18 A max PV panel current, peer MPPT. I can't imagine that the 11 kW models would have a lower current limit.

Usually, apart from brief moments (of the order of 10-60 seconds) after a cloud passes, panels provide a maximum of about 75-80% of rated power. So you might not get much more than 80% of the rated 14 A, and 0.8 x 14 = 11.2 A. Maybe you just thought you got more from your previous inverter.

What is the NOCT (Normal Operating CondiTion) Imp?

It could be some sort of firmware bug, rather than a deliberate limitation. What version of main (U1) firmware are you running?

I am using the version posted by @JDAVIES94 - 57.61 
 

Edited August 22, 20232 yr by sergeyshadow

1 hour ago, Coulomb said:

  Intr-un alt subiect:

Aceasta este versiunea de firmware principală Axpert Max 8kW 272.66, bazată pe versiunea de firmware din fabrică 72.66, pentru Axpert Max E 8 kW non-twin. Este pentru utilizarea cu instrumentul de reflash Arena și utilizarea comenzii de reflash C28066.
Acest patch folosește doar cele două modificări de comparare a curentului, fără a afecta deloc tensiunea MPPT minimă.
Schimbă pragul de curent MPPT de la 50 (0,50 A) la 5 (0,05 A). De asemenea, remediază eroarea de flotare prematură și modifică numărul versiunii. Nu utilizați cu niciun alt model; firmware-ul dvs. existent trebuie să fie 72.xx, 91.04 sau 92.04.

Folosiți pe propria răspundere; Nu pot testa pe un invertor real. Instrucțiuni de încărcare a firmware-ului .

 

dsp 272.66 patched Max II 8kW 28066.zip 701,46 kB · 0 descărcări

Now i have 92.05 patched by u. I can flash this right ?

On 2023/08/22 at 9:05 PM, add1c7ed55 said:

Now i have 92.05 patched by u. I can flash this right ?

Yes.

92.05 is a patched version of 92.04, with the current threshold reduced from 0.50 A to 0.10 A.

92.06 is a patched version of 92.04, with the current threshold reduced from 0.50 A to 0.05 A.

These were before I started using the hundreds column to distinguish patched version numbers. 92.04 is dated 22-Sep-2022.

272.66 is a patched version of 72.66, with the current threshold reduced from 0.50 A to 0.05 A.

91.04, 92.04, and 72.6x are all for the Axpert MAX E 8 kW '28066 non-twin. So you can use 272.66, and you'll get the even-lower current threshold that is the latest figure in patching circles.

Now, after doing a moderate amount of work getting 272.66 ready, I noticed that I have not one but two firmware versions with the number 72.68, from 2/May/2023 and 5/May/2023. I've just spent a few hours trying to figure out what the difference between the two 72.68s is. My preliminary conclusion is that the early 72.68 is some sort of debugging version that was not meant to be released. So now I can compare 72.66 and the later 72.68, to see what changes were made, and therefore if it's worth patching  72.68 again.

If it is, the work I've done for 72.66 should transplant into 72.68 fairly easily.

Edit: I note that 92.04's MPPT algorithm is different from earlier and later versions. It's not clear to me which is going to be best, but all the later firmwares seem to be doing it similar to 72.66 and later. 92.04 does not have the 250 V test.

Edit Dec 2024: 92.04 does NOT have the "presumed good" MPPT logic.

Edited December 21, 20241 yr by Coulomb
Added last paragraph.

27 minutes ago, Coulomb said:

Yes.

92.05 is a patched version of 92.04, with the current threshold reduced from 0.50 A to 0.10 A.

92.06 is a patched version of 92.04, with the current threshold reduced from 0.50 A to 0.05 A.

These were before I started using the hundreds column to distinguish patched version numbers. 92.04 is dated 22-Sep-2022.

272.66 is a patched version of 72.66, with the current threshold reduced from 0.50 A to 0.05 A.

91.04, 92.04, and 72.6x are all for the Axpert MAX E 8 kW '28066 non-twin. So you can use 272.66, and you'll get the even-lower current threshold that is the latest figure in patching circles.

Now, after doing a moderate amount of work getting 272.66 ready, I noticed that I have not one but two firmware versions with the number 72.68, from 2/May/2023 and 5/May/2023. I've just spent a few hours trying to figure out what the difference between the two 72.68s is. My preliminary conclusion is that the early 72.68 is some sort of debugging version that was not meant to be released. So now I can compare 72.66 and the later 72.68, to see what changes were made, and therefore if it's worth patching  72.68 again.

If it is, the work I've done for 72.66 should transplant into 72.68 fairly easily.

Edit: I note that 92.04's MPPT algorithm is different from earlier and later versions. It's not clear to me which is going to be best, but all the later firmwares seem to be doing it similar to 72.66 and later. 92.04 does not have the 250 V test.

Understand. And that 250v test that is.missing is good or not ?

1 minute ago, add1c7ed55 said:

And that 250v test that is missing is good or not ?

It doesn't seem to be very effective. Those that have used 72.66, for  example, don't report much improvement.

I was hoping that it would be the "right way" to fix the problem.

So far, the 0.05 A current threshold seems to be the best fix. That's what 272.66 and many of my later patches do. And if I understand correctly, you already have this in 92.05, except that the threshold is twice what we now believe is the best value.

Now, if only Voltronic would try this and save a bunch of hassle for future owners. Maybe with their facilities, they can find an even better threshold, or some modification of the algorithm that is better all around. But so far, they've never touched that 0.5 A threshold.

46 minutes ago, Coulomb said:

Nu pare a fi foarte eficient. Cei care au folosit 72.66, de exemplu, nu raportează prea multe îmbunătățiri.

Speram că va fi „modul corect” de a rezolva problema.

Până acum, pragul de curent de 0,05 A pare a fi cea mai bună soluție. Asta fac 272.66 și multe dintre patch-urile mele ulterioare. Și dacă am înțeles bine, aveți deja acest lucru în 92.05, cu excepția faptului că pragul este de două ori mai mult decât credem acum că este cea mai bună valoare.

Acum, dacă doar Voltronic ar încerca acest lucru și ar salva o grămadă de bătăi de cap pentru viitorii proprietari. Poate că, cu facilitățile lor, ei pot găsi un prag și mai bun sau o modificare a algoritmului care este mai bună peste tot. Dar până acum, nu au atins niciodată acel prag de 0,5 A.

I understand. Thanks 

5 hours ago, Coulomb said:

  In another topic:

This is Axpert Max 8kW main firmware version 272.66, based on factory firmware version 72.66, for the Axpert Max E 8 kW non-twin. It is for use with the Arena reflash tool and using the C28066 reflash command.
This patch uses only the two current compare changes, not affecting minimum MPPT voltage at all.
It changes the MPPT current threshold from 50 (0.50A) to 5 (0.05A). It also fixes the premature float bug and changes the version number. Do not use with any other model; your existing firmware must be 72.xx, 91.04, or 92.04.

Use at your own risk; I am not able to test on an actual inverter. Firmware upload instructions.

 

dsp 272.66 patched Max II 8kW 28066.zip 701.46 kB · 0 downloads

I want to flash it, the old file was vpk5.inv, now there are a lot...which i must select ?

11 hours ago, add1c7ed55 said:

the old file was vpk5.inv, now there are a lot...which i must select ?

Voltronic have made it a bit confusing by calling hex files .inv files.

Just run the Arena reflash tool (the only executable). Click on the File button; the first time you run it you have to navigate to the reflash folder (I wish that they could fix that). Then there will only be the choice of the two .inv files. One has "original" in it, that's only for if you need to go back to it. The other one will have 272.66 in the name; that's the one you want to start with. The leading "2" (or other digit) indicates that it's the patched firmware; so far, all factory firmware is four digits total (nn.nn), apart from a few display firmwares with 5 digits that start with a leading "1" (1nn.nn). So I avoid a leading one in patched firmware now.

You need a Windows machine to run the reflash program. The photo above looks like it's on a phone or iPad.

@Coulomb

What firmware can be used if my current MAX is using 46.02?

I want to flash but just to be sure Axpert Max E is same as what we called Axpert Max 1 or it's for Axpert Max 2 (with round screen)

6 hours ago, Etiennet said:

What firmware can be used if my current MAX is using 46.02?

You can use presumably any 46.xx firmware, e.g. 46.71 available from here. 46.71 seems to be the '2809 equivalent of 72.66.

You can also use factory firmware version 90.06, or any of the wonderful patched versions thereof, to fix the stuck at 90 V problem, or the one that addresses shading specifically. There are many in this very topic.

2 hours ago, sharkut said:

just to be sure Axpert Max E is same as what we called Axpert Max 1

Yes. The Axpert Max E is what Voltronic call the Max models without the round display; I think of it as the ones with the rEmovable display.

The Axpert Max II are the models with the round display.

15 hours ago, Coulomb said:

You can use presumably any 46.xx firmware, e.g. 46.71 available from here. 46.71 seems to be the '2809 equivalent of 72.66.

You can also use factory firmware version 90.06, or any of the wonderful patched versions thereof, to fix the stuck at 90 V problem, or the one that addresses shading specifically. There are many in this very topic.

Thanks Coulomb!

Which version would both do the 90 V stuck problem and addresses the Shading? can you please point that one out to me so I can flash it?  Would really appreciate it!

19 minutes ago, Etiennet said:

Which version would both do the 90 V stuck problem and addresses the Shading?

My understanding, without owning one of these models, is that it's really "either or". So only use the shading one if you have a particular problem with shading. If you do have a shading problem, then definitely use that one.

As for the others, sorry, there are so many, using various techniques, and in many cases, targeting a specific minimum MPPT voltage, and some may work better than others with a particular number of panels. The best thing is to read through them all (I know it's a long topic), and decide which one sounds like it matches your situation better than others. I wish it was easier, but we're still exploring the various options. Hopefully one day we'll have one solution that works well for most users, though of course with the proliferation of models, you still have to choose the right version that matches your hardware.

Sorry but I don't understand how threshold is supposed to work, because voltage seems to increase always at 0,5A with 272.66 firmware and same with my previous firmware 172.62 (0,25A threshold)

 

I join screenshot to illustrate

First 272.66 and below 172.62

Edited August 24, 20232 yr by sharkut

Maybe it's only working when Amp are lowering and not increasing

I think you're looking at battery-side current. Half an amp at 50 V is only 25 W; barely enough to get the power supply started.

The 0.05 A threshold is panel current, something that is rarely reported by inverters or their monitoring software.

Please check your PV power for the same period.

Hello, please tell me if I need to update the CPU firmware? I use an EASUN ISolar SMW 8K type inverter.

Edited August 25, 20232 yr by Monos

12 hours ago, Monos said:

please tell me if I need to update the CPU firmware?

72.03 is a bit old now, and they have changed the MPPT algorithm significantly since then. So you could try 72.68 (use the later version), or patched firmware version 272.66.

Edit: I've had a chance to compare 72.66 and 72.68 now; I'm not convinced that 72.68 is actually better, despite supposedly being 2 months later. So perhaps also consider factory firmware version 72.66 as well. I wish it wasn't this complicated and confusing.

Edited August 26, 20232 yr by Coulomb

5 hours ago, Coulomb said:

72.03 is a bit old now, and they have changed the MPPT algorithm significantly since then. So you could try 72.68 (use the later version), or patched firmware version 272.66.

Thank you. Tell me, what is the difference between the corrected version 272.66 from 72.66 and which one is preferable to use?

Edited August 26, 20232 yr by Monos