I have a 11kw twin inverter ( voltronic ) with 78.06 and 38.08 and i have the same problem with mppt algorithm, 90v stuck, and so on. Do someone have and know a version that i can reflash on it ?

Check out this thread, you seem to have the same problem. Try turning on sbu mode, does the power increase?

 

 

Hi all. I have easun smw11k twin with firmware 78.06, stuck at 90v. Is anyone here that have a new firmware? I saw in the comments that exist a person @coulomb that can patch? It will be awesome...thanks a lot.

 

Hi all. I have easun smw11k twin with firmware 78.06, stuck at 90v. Is anyone here that have a new firmware? I saw in the comments that exist a person @coulomb that can patch? It will be awesome...thanks a lot.

Yes is an user @Coulomb, but now he said is very busy. Im waiting for that patch too. Hope he will have time for us soon. Good day.

 

Yes is an user @Coulomb, but now he said is very busy.

I have found enough time to patch 78.07. Sorry for the long wait.

This is patched firmware version 278.07, based on factory firmware version 78.07 for the Axpert Max E 11 kW Twin '28066. Do not use with any other model, not even an Axpert Max E 11 kW Twin with '2809 DSP (it will refuse to update the firmware).

This patch implements Georg594's patches for firmware version 90.06, but applied to 78.07. It also fixes the premature float bug, and changes the version number reported by monitoring software to 278.07. The display will still show 78.07. The current threshold is changed from 0.50 A to 0.05 A, and the minimum MPPT voltage is changed to 200 V.

Use at your own risk; I do not have a Max to test this firmware on.

Firmware upload instructions for models with a removable display.

dsp_278.07 patched 200V.zip

 

Am găsit suficient timp pentru a corecta 78.07. Scuze pentru lunga asteptare.

Aceasta este versiunea de firmware corecţionată 278.07, bazată pe versiunea de firmware din fabrică 78.07 pentru Axpert Max E 11 kW Twin '28066. Nu folositi cu niciun alt model, nici macar un Axpert Max E 11 kW Twin cu '2809 DSP (va refuza actualizarea firmware-ului).

Acest patch implementează corecțiile Georg594 pentru versiunea de firmware 90.06, dar aplicată la 78.07. De asemenea, remediază eroarea de flotare prematură și schimbă numărul versiunii raportat de software-ul de monitorizare la 278.07. Afișajul va afișa în continuare 78.07. Pragul de curent este modificat de la 0,50 A la 0,05 A, iar tensiunea minimă MPPT este modificată la 200 V.

Folosiți pe propria răspundere; Nu am un Max pe care să testeze acest firmware.

Instrucțiuni de încărcare a firmware-ului pentru modelele cu afișaj detașabil.

dsp_278.07 patched 200V.zip 708,97 kB · 

Tnanks a lot. U are the best.

Hello everyone, I have an Axpert Max 2 11k Twin with firmware u1 75.00 and u2 39.04. Has anyone seen/found these firmware?
Thanks!

 

Has anyone seen/found these firmware?

No. The closest I've seen is 65.08 for its variant with the '2809 processor. It's about 2 months old as I type.

Similarly, I have only the 38.11 display firmware, but that's for the removable display variant. The firmware for the round built-in display would be completely different.

Sorry! There are so many variants.

Hi

 

Thanks @Coulomb for the constant help.

My Axpert 11kw is now a year old, it has the square display (don’t know if it’s the max or twin).

Firmware version 57.04 (u1) and 12.21 (u2), is there any good firmware updates for it?  Just looking for the standard default versions (not patched), mainly in light of warrantee issues, and my brilliant luck with such.;)

On 2024/03/23 at 6:00 PM, ebrahim said:

Firmware version 57.04 (u1) and 12.21 (u2), is there any good firmware updates for it?

U1 57.xx confirms that it's an Axpert Max E 11kW non-twin '2809. The latest main firmware I've seen is 57.07 from September 2023:

12.21 seem to have been pretty good. The latest is 12.28, available below with 57.07 no less:

As for whether either of these is "good" or "worth updating to", I don't know. Time will tell. Search this forum for reports.

Edited March 25, 20241 yr by Coulomb

Bună seara. Si eu am un invertor de 11 kw voltronic. Firmware 078.07 si 038.08. Stie cineva dacă a aparut vreo actualizare pentru firmware?

On 2024/03/31 at 8:44 AM, Florinel said:

Good evening. I also have an 11 kw voltronic inverter. Firmware 078.07 and 038.08. Does anyone know if there has been a firmware update?

78.07 is the only 78.xx firmware update I've seen, so no, nothing later than that.

Display firmware 38.11 is available.

 

Hi!

I’ve 2 anenji 11kw inverter Anj-max-11kw-tw (same as axpert max twin 11kw with firmware 78.07 and display 38.08 connected to 2x16kw lifepo4 with jk bms 200a.

I’ve actually 11kw pv (2x5500w) and next month, 11kw more pv…

If I put 11kw on one inverter, I’m limited to 90a from solar to charge my bat … if my home need some energy, mppt can deliver 11kw in total, but limited to 90a to batt.

but if I put 5500w on each inverter, I’ve 2x90a so my bms don’t limit current…

same result on each inverter, one motherboard was remplacés next week but no better…

someone have this limitation with this version or older version?

any correction on the 278.07 version for this problem?  

thanks!

John 
 

 

On 2024/07/12 at 6:57 AM, Johnjohn031 said:

but if I put 5500w on each inverter, I’ve 2x90a so my bms don’t limit current…

Sounds good. You will be able to charge almost to the limit that your BMS can handle (200A).

 

On 2024/07/12 at 6:57 AM, Johnjohn031 said:

but if I put 5500w on each inverter, I’ve 2x90a so my bms don’t limit current…

same result on each inverter, one motherboard was remplacés next week but no better…

I don't understand what this limitation is. Each inverter can charge at up to 90A,so you have a maximum of 180A charging the battery. Any more than 200A and the BMS will disconnect. 

Are you saying that despite this, you'd like more of the Solar Charge Controller's potential power to be able to be sent to the battery? Even though most of the time you can't use it?

The battery charge current limit is a hardware limitation. I suspect that it's the buck stage that sets this limit. I very much doubt that firmware could change this. 

Edit: However, I've just checked and in Max models, the buck converter is two transistors in parallel, like all the other stages. So I would expect it to be capable of at least 80% of the DC-DC rated power, which is the rated output power, 11kW, in other words abiut 8.8kW. So restricting it to 4.5kW (90A x 50V, ignoring losses for simplicity) does seem very low. But that part of the firmware resists my efforts at understanding it. Certainly no existing patched firmware attempts to change this, and I don't expect that to change in future. 

Edited July 17, 20241 yr by Coulomb

This is factory main (DSP, U1) firmware version 78.08 for the Axpert Max E 11 kW '28066 Twin (with removeable display). Do not use with any other model or chipset, i.e. only if your existing main firmware is version 78.xx. This version does NOT have the presumed good MPPT logic, so it you are bothered by the stuck at 90 V issue, see the patched 78.07 firmwares. Use at your own risk.

Firmware upload instructions for models with a removable display.

MAXE11K_TWIN_DSP_78.08.7z

On 2024/11/05 at 8:20 AM, Coulomb said:

This is factory main (DSP, U1) firmware version 78.08 for the Axpert Max E 11 kW '28066 Twin (with removeable display). Do not use with any other model or chipset, i.e. only if your existing main firmware is version 78.xx. This version does NOT have the presumed good MPPT logic, so it you are bothered by the stuck at 90 V issue, see the patched 78.07 firmwares. Use at your own risk.

Firmware upload instructions for models with a removable display.

MAXE11K_TWIN_DSP_78.08.7z

Hi,

I have Easun - ISolar SMW 11Kw TWIN. which i identified same as Axpert Max E 11 kW '28066 Twin (with removeable display).

I faced "stacked at 90V" issue once but restart helped. Since then it not came again.

But i have a different problem which is not solved with restarting the inverter.

My problem The maximum charging current is limited to 100A. It should be 150A by specification but I have a problem with maximum battery charging current not goes above 100A (~ around 5400W) in spite of solar panels are provides ~7KWh power.

Settings 02 (maximum charging current) is set to 150A and charging current is increasing only to 100A, and then stay at there.
PV1- has 10 x 430W panel.
PV2- has 12 x 430W panel.

Relevant settings:
01- SBU.
02- 150A
11- Uti - 50A - but this not relevant
16- OSO

Software version: CPU: 78.08 Secondary CPU: 38.17 

Pls help.

Best Regards,
Robert

I second the above issue, I have a Tommatech 11kw non-twin (clone of Axpert Max with removable display) and whatever I do I cannot make my batteries charge above 100amps. I have 6x Dyness A48100 (approx 28.8 kwh) and a Braun battery (modified from 16s to 15s with JK BMS, approx 13.4 kwh) in parallel, both MultiSibControl with the Dyness batteries input and Solar Assistat with a Victron Shunt (for all Dynesss and Braun batteries) talking to the inverter. I have tried switching off one or the other in various combinations and sequence but the batteries do not charge above 100amps, though their BMS settings are for 150A. I have also tried changing in MultiSibControl the "PV power balance strategy" settings between "Charge only" and "Loads + Charge" which sends a PSB0 or PSB1 command to the inverter (and this changes the setting in Solar Assistant for "PV power Balance" between "Limit PV input to max charge current" and "Allow higher PV than max charge current" but no change, batteries still charge with max 100amps, even if I disconnect some of them and try using only MultiSibControl or Solar Assistant.

Actually for Robert1968 above, the max charge setting of 150A includes BOTH from PV and from Utility, however even if my Utility charges is set to 2A or 10A, the Batteries are charged with max 100A from Solar

@Coloumb will appreciate any insight you might provide on the above inverter behaviour/logic, I am using your 273.63 firmware.

Thank you in advance

Edited April 12Apr 12 by stakoz

Hi Stakoz,

Sorry to say it, but I'm happy to see I'm not alone with this issue, :) because I find only one similar reports on one forum, but there was no solution for it.

Maybe I should open a new topic for it?

BTW, when I switched from OSO (charge from Solar only) to SOlar and Utility together charge, then the charge current went to ~130A for a few seconds but then went back to 100A within 10 seconds.

Thanks Robert

17 hours ago, robert1968 said:

My problem The maximum charging current is limited to 100A.

This is a complex issue. I've put a few hours into it with no bug found yet that might cause this, but I have to move onto other things. Please remind me again if I forget to get back to this.

Many thanks Coulomb for all your efforts!

I found this issue were already raised in this forum: Here (But no solution yet.)

@coulomb, thanks for the constant updates,

Wanted to inquire if you have any further updates for the axpert max think its 2809 (original firmware was 5404 and 12.21), I’m having an issue with clipping. I have 2 banks of solar arrays, 8*550W connected in series (PV1), and 12*330W connected in 4 parallel sets of 3 )PV2), PV 2 seems to be clipping at the 2000 W mark, even though PV 1 is easily generating over 3000W, I’ve tried isolating PV 1 from 2 with no difference. I have noticed that PV 2 does cause the fans to spin a lot more than PV 1, figuring that is mainly since the average volts for PV 2 sits at the 105-120V when compared to the 320-360V of PV1. I have checked the 4-1 strings which comprise PV 2 and that seems good, the panel’s are relatively clean and power uptake works well until the 2000W mark (the fans do spin more/louder though).  Don’t think it’s a voltage stuck issue, since PV 2’s voltage is much lower when compared to PV 1 in light of the parallel and series connection, any possible idea? I’m thinking something about the fans spinning too much is triggering a limiting of performance; heat on the inverter doesn’t seem too much, however I’m measuring on the outer surface, not with the cover out.

On 2025/05/13 at 1:24 PM, ebrahim said:

for the Axpert max think its 2809 (original firmware was 5404 and 12.21),

My notes say that 54.04 is for an Axpert Max II 8kW non-twin, and this thread has "11 kW" in the title. So Max IIs have the round display, yet display firmware version 12.21 is for a removable display. Are there any typos in the above?

On 2025/05/13 at 1:24 PM, ebrahim said:

I have checked the 4-1 strings which comprise PV 2 and that seems good, the panel’s are relatively clean and power uptake works well until the 2000W mark (the fans do spin more/louder though).  Don’t think it’s a voltage stuck issue, since PV 2’s voltage is much lower when compared to PV 1 in light of the parallel and series connection,

I think that your problem is that the panels have too much current and not enough voltage. Each MPPT has a definite panel current limit, and the high PV voltage Solar Charge Controllers seem to be happiest with PV voltage around 360 V. The Axpert Max II 8kW manual I checked says that the PV input limit is 18 A. At 110 V, that's only 1980 W. Can you reconfigure MPPT2's panels to have say 2 strings instead of 4 (if I understand what you wrote). That should double the voltage to about 220 V, bringing the power limit to some 4 kW.

None of the firmwares in the 54.xx series have the "presumed good" MPPT logic either, so they would be prone to the "stuck at 90 V" issue. I don't seem to have a patched firmware for them either.