5 hours ago, Chilla said:

since it switched to line mode in the evening, it stayed there since.

Does the battery voltage get over 51.0 V? That's the back to discharge (battery powering loads) that you have set.

What is the low battery cut-off setting (setting 29)? That can sometimes interfere.

Also, what type of battery do you have? If it's a Pylontech for example, it may never get to 54 V, since this is the "never exceed" voltage, and the battery's BMS will disconnect from the inverter before it gets there, which can confuse things no end.

19 hours ago, Coulomb said:

Does the battery voltage get over 51.0 V? That's the back to discharge (battery powering loads) that you have set.

What is the low battery cut-off setting (setting 29)? That can sometimes interfere.

Also, what type of battery do you have? If it's a Pylontech for example, it may never get to 54 V, since this is the "never exceed" voltage, and the battery's BMS will disconnect from the inverter before it gets there, which can confuse things no end.

Thank you for your answers.

The battery voltage gets over 51V, we raised it otherwise it didnt charge the battery enough. Unfortunately who set it up, doesn't want to help us anymore.

Low battery cut-off setting: 44.0 V as default

Battery type: lead-acid battery 48v 690Ah

We also did a battery equalization.

On 2023/11/09 at 2:27 AM, Coulomb said:

Does the battery voltage get over 51.0 V? That's the back to discharge (battery powering loads) that you have set.

 

Well, what I forgot to mention that utility doesnt charge the battery in line mode... even if its above 51.0V
But we switched it off for an hour yesterday and it works better now, it switches to battery mode now... Is there any other way to restart it?

And if there isnt enough solar power (only 60W), how can we charge the battery from utility? We will have rainy weeks now, and it doesnt go now above 50.0V. From our setting I understand it schould also charge from utility, but it actually doesnt do it. 

Edited November 11, 20232 yr by Chilla

2 hours ago, Chilla said:

From our setting I understand it should also charge from utility, but it actually doesn't do it. 

There is a maximum utility charge current; it might be set to 2 A, in which case you might not notice it.

Otherwise, yes, it should be utility charging with the settings you indicated. To stop it utility charging in good weather, change the charger source priority setting.

2 hours ago, Chilla said:

Is there any other way to restart it?

You can avoid having to disconnect the battery by turning off the "power" (really DC-AC converter) switch, if you have no charge sources (solar or grid). I'm not aware of any other way.

Hi. @Coulomb now i use the 164.62. 

Next days i will remake my string to + 300V. It will be a problem to continue using the 164.62 ? Now i have nominal Voltage at arround 200V but i will put 11 panales with VOC 37.2 in series. 

I need to put the 264.62 ? Or i can let de 164.62 ? What problems can be if i use the 164.62? Thanks. 

2 hours ago, vladsuciu said:

What problems can be if i use the 164.62?

If you use MPPT patched firmware with too low a minimum voltage, then you might get "stuck at 150 V" instead of "stuck at 90 V". Not the end of the world, but if the panels are never going to go lower than 300 V, then you can still have significant power unavailable due to the bug.

But maybe once they get to 150 V, they'll continue on to the MPPT voltage. Not owning one, I don't have a feel for how they will behave. My recent impression is that they can still get stuck, hence the need for several voltage options.

Edited January 5, 20242 yr by Coulomb

Hello Coulomb, would it be possible to modify the firmware, ensuring that in SUB and SNU mode, the inverter can charge the batteries from the grid, when solar is available? (as per manual).

At the moment, when it is in SUB+SNU, and solar is available, the battery is not charged, in the evening, when the sun is <90v, it charges from UTI.

It is a bug?

Thank you

6 hours ago, jos89 said:

would it be possible to modify the firmware, ensuring that in SUB and SNU mode, the inverter can charge the batteries from the grid, when solar is available? (as per manual).

Sorry. Not owning one, this is beyond my capability, at least at this stage.

6 hours ago, jos89 said:

It is a bug?

I have no idea. My Axpert MKSs from 2015 are so very different to these.

Hello all, first post

I have 3 off 11kw Axpert Voltronic Max E inverters configured in a 3 phase set up with 4 Pylontech US5000 a total of 33kw of panels in 5.5k strings

looking for guidance

I think i experienced this:- When there is leakage to earth from panels (e.g. when raining), this sometimes leads to excessive bus voltage, often leading to shut down due to fault code F08. I don't know if this is purely hardware, or firmware, or both. Some owners have to disconnect their panels at night as a result.

 

has anyone solved this that we are aware of please?

Hi @Coulomb I've installed 164.62 version but i have a problem when is about 15:30 and have a little clouds mppt is dropping voltage in about 110-98v and mppt is generating about 11w is it possible to make it 90v or lower, but lower starting amps. also i have another inverter copy of 11kw with 73.03 firmware which is starting in about 70v, and it is working great with mppt. Otherwise your firmware is great thank you very much

Edited September 29, 20241 yr by Mtodorov

On 2024/09/27 at 1:49 AM, Mtodorov said:

is it possible to make it 90v or lower,

I'm not comfortable with making it lower than the factory value of 90V, but yes, if you have a short string on an MPPT, then you would probably benefit from the minimum MPPT voltage staying at 90V. So I've made a 90V version. You'll have to delete dsp.hex (it's the 150V version, since I expect that to be the most commonly used variant), duplicate dsp_964.62_patched_90V.hex, and rename the result  to dsp.hex. If you had the '28066 model, then you'd get the newer reflash tool which can pick any hex file from a list (advanced! :-O).

Please let me know how it goes.

 

These are patched firmwares version x64.62 for the Axpert Max E 11kW Twin with the '2809 DSP chip, based on factory firmware version 64.62. Do not use with any other model. Read the "Readme patched versions.txt" file for how to choose one of the three patched firmware variants, or to revert to the factory firmware. Use at your own risk.

The patched firmwares implement all of Georg594's original patches, although one patch (for each MPPT, so two total) could not be exactly applied. I've applied it as best I can "in the spirit" of the original patch. It also fixes the premature float bug, and changes the version number reported by monitoring software to x64.62.The current threshold is changed from 0.50 A to 0.05 A, and the minimum MPPT operating voltage is changed from 90 V to 200 V / 150V / unchanged (90V).

The 150V and 200V patched firmwares in this file are the same as released earlier.

Firmware upload instructions for models with a removable display.

dsp_x64.62_patched_200V_150V_90V.zip

Edited October 6, 20241 yr by Coulomb

I have an Easun smw 11kw with a removable display. I have 64/09. I tried to upload 64.62 from a USB pendrive. After about 10 minutes, the display returns to the main menu and freezes. nothing can be switched. I have to turn the inverter off and on but the software is still old. what am I doing wrong? Should there be only the "dsp.hex" file on the pendrive? or some other file?

On 2024/10/12 at 6:41 PM, bleki315 said:

Should there be only the "dsp.hex" file on the pendrive?

I've never succeeded with that method, but I've not tried hard.

My understanding is that for this model, all you need is the hex file, renamed if necessary to dsp.hex, and it must be in the root directory of the USB stick.

Is it in the root directory?

I assume that's a USB-A to micro-USB adapter between the stick and the inverter?

You end up with the UPD YES on the display and press some key?

BTW,  64.62 is slightly older than 64.09, but it does have the "presumed  good" MPPT logic, unlike 64.09.

On 2024/10/12 at 11:41 AM, bleki315 said:

Should there be only the "dsp.hex" file on the pendrive? or some other file?

There should not be any other files/folders on the root directory of the flash drive other than the update file itself. In your case just make sure that the filename is correct (refer to Coulomb's details). It is known that it might cause a lot of issues when performing a firmware reflash for any kind of equipment. The file readers in these basic equipment are not full fledged file managers, they're so tiny and too simple to handle file management.

thank you @Coulomb i will test it and give info on how is working. I've downloaded new versions if someone wants to test them, they are directly downloaded from voltronic

 

Remote Panel_Reflash_MCU(38.18).rar MAXE11K_TWIN_6409.7z

Edited December 9, 20241 yr by Mtodorov

Good evening, I have an Easun 11 kW Twin Inverter with this firmware version U1= 64.08, U2= 34.08, I would like to eliminate the 90V mppt bug. Kindly thank you.

Edited January 15, 20251 yr by Eruca

On 2023/10/02 at 11:19 AM, Coulomb said:

At the end of this post is patched firmware version 264.62, based on factory firmware version 64.62 for the Axpert Max E 11 kW Twin and the '2809 DSP chip. I note that there was a .rar file released where the final conversion to hex file was not created properly, so the update file actually would have flashed to an earlier version. Fortunately, I was able to correct this; for reference, the corrected original factory firmware update file (now in a zip archive) is here:

64.62＿ISOLAR SMW 11KW TWIN recovered.zip 1.49 MB · 74 downloads

The patched firmware implements all of Georg594's original patches, although one patch (for each MPPT, so two total) could not be exactly applied. I've applied it as best I can "in the spirit" of the original patch. It also fixes the premature float bug, and changes the version number reported by monitoring software to 264.62. The removable display will still show 64.62 (i.e. U1 64 62). The current threshold is changed from 0.50 A to 0.05 A, and the minimum MPPT operating voltage is changed from 90 V to 200 V.

Do not use with any other model, not even the Axpert Max E 11 kW Twin with '28066 DSP chip (but there is a separate patched firmware for that combination). Use at your own risk.

Firmware upload instructions for models with a removable display.

This is the patched firmware (with the original included as dsp_original.hex):

dsp_264.62 patched_200V.zip 1.77 MB · 86 downloads

Hi Coulomb,

Is this the same for te Axpert Max E 11 kW Dual (2 ac in)?
i have MAX DUPLEX 11K
U1 11-05
U2 62-03
U3 00-00
U4 58-03

On 2025/02/13 at 7:47 PM, porzioev said:

Is this the same for te Axpert Max E 11 kW Dual (2 ac in)?
i have MAX DUPLEX 11K
U1 11-05

No, 64.xx is for the Axpert Max E 11kW '2809 Twin . You have an Axpert Max E 11kW '28066 Duplex.

All these "dimensions" are important:

• Axpert versus Infini (Infinis are grid tie)
• Max versus VM IV versus Ultra versus...
• E versus II
• 11kW versus 8kW versus ...
• '2809 versus '28066
• For Max models, Twin versus non-Twin versus Duplex.

Each difference requires a different firmware.

All you can run at present is 11.05, which you already have, or patched firmware versions x11.05 that are based on factory firmware version 11.05.

Buongiorno a tutti

Ho un VOLTRONIC 7.2KW anno 03.2023 versione U2 112 14

Ho acquistato batteria GooSun da 16kw protocollo phylontech, ma anche collegando il cavo fornito dal produttore della batterie e cablato corretto, non si collega e dopo 10 minuti stacca tutto.

Ammetto che non siamo esperti, qualcuno può aiutarci?

Leggo di tutto ma mi confondo sempre di piu, ringrazio in anticipo.

On 2025/04/16 at 1:29 AM, Francescovoltronic said:

Buongiorno a tutti

Please post in English on this forum.

On 2025/04/16 at 1:29 AM, Francescovoltronic said:

Good morning everyone

I have a VOLTRONIC 7.2KW year 03.2023 version U2 112 14

I purchased a 16kw GooSun battery with phylontech protocol, but even when connecting the cable provided by the battery manufacturer and wired correctly, it does not connect and after 10 minutes it disconnects everything.

I admit that we are not experts, can anyone help us?

I read everything but I get more and more confused, thanks in advance.

The needed cable wiring depends on the inverter as well as the battery. They probably provided a cable to suit a Deye or other common inverter.

To fix that, we need to know the pinout at the battery end, or if the Pylontech compatibility includes the communications connector. There are usually several RJ-45 connectors on the battery, most of them 8-pin, so you also have to plug into the correct one.

Hopefully you got a user manual with the battery, or at least there is a web site to download it from.

Also, your display firmware, which handles communication with the battery's BMS, is fairly old. It might be worth updating it to version 12.28 or 12.29.

Edit: They drop the leading "1" digit with recent display firmware, so recent 12.xx are compatible with older 112.xx display firmwares.

Edited April 19, 20251 yr by Coulomb

If anyone needs it. I haven't tested it, it's probably for 28066. Maybe Coulomb can see it and tell which inverter it is for.

MAXE11K_TWIN_DSP_78.10.zip

Edited February 13Feb 13 by jevko

Factory firmware version 64.09 does not have "presumably good" MPPT logic - tested. 264.62 has "presumably good" MPPT logic - tested, also has SOC. Updated and Remote Panel_Reflash_MCU(38.18) I didn't notice any difference.

Edited February 13Feb 13 by jevko

On 2026/02/13 at 11:04 PM, jevko said:

Maybe Coulomb can see it and tell which inverter it is for.

Yes, 78.10 is for the Axpert Max E 11kW '28066 Twin. It has the QDOP command, so it should be able to have settings based on SoC% (from the display at least, as long as the display firmware is recent enough).

As usual for "production" firmwares (minor version number < 60), it does not have the "presumed good" MPPT voltage control algorithm.

Edited February 23Feb 23 by Coulomb
Added text re minor version number