Hello, în having trouble with Voltronic 8kw twin, it doesn’t want to comunicate with the life’s battery , it JK BMs 200 A , I’ve tryed diferent setting but they still don’t comunicate  , any ideea of what i should do? 

On 2025/01/07 at 7:47 AM, Voltronic8kw said:

Hello, în having trouble with Voltronic 8kw twin, it doesn’t want to comunicate with the life’s battery , it JK BMs 200 A , I’ve tryed diferent setting but they still don’t comunicate  , any ideea of what i should do? 

Hi @Voltronic8kw  could you open a new topic for your issue ?

Best Regards

On 2024/04/28 at 1:46 PM, Coulomb said:

Well, 72.72 does have the full QDOP command, meaning that with the right display firmware (12.21 is enough, I believe), you get SoC% for battery settings 12, 13, and 29 (back to utility, back to battery, and low DC cut-off). These seem to be popular with owners that have a Pylontech or other battery with a BMS that the inverters or monitoring software can talk to.

I also see that 272.66 is one of my early minimalist patches that didn't do the full suite of Georg's MPPT patches. That makes it PV voltage independent, but it seems that the full suite is still the best. Would there be demand for a set of X72.72 patches, all with the premature float bug fixed, and several minimum PV voltage options? I haven't done a patch set in a while, and I'd like to not have the rust set in too badly 🤎🤓

If you currently run 12.xx or 112.xx, then yes. Since 12.21, they are all chipset independent (if only they realised they could do something similar with the main firmwares as well!). I don't know what the differences are with 12.28, though I'll take a look tonight.

Hi Coloumb, All confusion set aside between Max and Max II, can you confirm if there is any firmware yet for the Axpert MAX II 8kW, that WILL allow SOC% in settings 12, 13 & 29?

 

Kind regards, Kurt

On 2025/01/15 at 5:20 AM, Kurtbe said:

can you confirm if there is any firmware yet for the Axpert MAX II 8kW, that WILL allow SOC% in settings 12, 13 & 29?

I only have 4 non-Twin firmwares for the Max II 8kW: 54.06 and 54.63 for the '2809 DSP, and 81.07 and 81.63. Sadly, none of these have the required support. The latest of these (54.06 and 81.07) have hex files dated 5th September 2023. We need slightly later firmware versions for the above SoC% support.

Hi Coulomb,

 I’m attaching the files that my seller uploaded to my inverter max expert 8k to enable the SOC management. After 2 months of operation, I can say that there is only one issue. The Watchpower app does not recognize the SOC, but only the volts for the back to grid and discharge.

Thank you for your tireless work.

MAX_8K_72.75.zip Remote Panel_Reflash_MCU 12.28.zip

Edited January 21, 20251 yr by smsteves

@smsteves

Is this the one with the removable display non twin model?

Doesn't 90/120V stick in cloudy weather?

90V or 120V starting PV voltage?

 

Thanks!

 

Edited January 21, 20251 yr by Tomeek

On 2025/01/21 at 6:35 PM, Tomeek said:

@smsteves

Is this the one with the removable display non twin model?

Doesn't 90/120V stick in cloudy weather?

90V or 120V starting PV voltage?

..

Hi Tomeek,

My inverter is Aexpert max 8k Twin.

The label says 90 volts, but from my tests it seems to activate at a higher voltage, then it may drop a bit. Currently, I have two arrays of 6 panels (about 220V), and it is complicated for me to check at a lower voltage. How did you obtain the graphs? With Dessmonitor?

On 2024/12/17 at 7:27 AM, Coulomb said:

Duh! If course, it's a Max II, so it will have 39.xx not 38.xx display firmware.

The latest I know of is 39.27, much more recent than 39.06, and available from the link below. Max II displays use the same firmware as VM IVs.

 

53 minutes ago, smsteves said:

Hi Tomeek,

My inverter is Aexpert max 8k Twin.

The label says 90 volts, but from my tests it seems to activate at a higher voltage, then it may drop a bit. Currently, I have two arrays of 6 panels (about 220V), and it is complicated for me to check at a lower voltage. How did you obtain the graphs? With Dessmonitor?

Yes, Dessmonitor will allow you to see the voltages. In the main page under "details". You get a reading every 5 minutes or so. At the bottom of the screen you can select the pagenumber which will bring you to the toime zone that you are lokking for. It will show the Voltage, Power and many things more.

@smsteves

On 12/12/2024 at 3:36 PM, Tomeek said:

Note:

If the display is 12.28, after updating the main cpu to 72.72 SN: 55355535553555
Other FW (72.66, 72.74, 172.62, 272.66...... ) factory SN: 92932xxxxx

I want a FW that shows the battery SOC (BMS)

Still 172.62 is the best. 272.66 is often PV voltage fluctuation. 272.66 Can't find a job or are you looking for it very often

A FW like 172.62 (0.25A) would be perfect for me, only the battery SOC indicates it

 

 

This is original Axpert max 8kW (display removed)

 

I tried the firmware: 72.75. I have a problem with the serial number...
That's not good for me either

 

On 12/20/2024 at 6:50 PM, Tomeek said:

72.68 older version supports battery SOC value. (HAX_HV_8k 72.68.7z ) 
The starting PV voltage is 120V. It's a very cloudy day. Successful breakout. It doesn't stick.
The loss is small.

The inverter display shows the SOC, but the dessmonitor and Viewpower show the voltage  12 (back to utility), 13 (back to battery), and 29 (low battery cut-off voltage)

The serial number is displayed correctly. 
No error
Help board supply solar connector remove

Which one is true? (Display VS PC Monitoring)

Is it worth changing both MPPTs to 0.25A?

 

 

 

 

 

Edited January 23, 20251 yr by Tomeek

On 2025/01/21 at 10:12 PM, smsteves said:

 I’m attaching the files that my seller uploaded to my inverter max expert 8k to enable the SOC management.

Thanks! The latest I had was 72.74. This one has the "presumed good" MPPT logic! Though of course with the 0.50 A current threshold.

12.28 display firmware I already had.

On 2025/01/21 at 10:12 PM, smsteves said:

After 2 months of operation, I can say that there is only one issue. The Watchpower app does not recognize the SOC, but only the volts for the back to grid and discharge.

Oh. Both of these firmwares seem to support the QDOP command, so I believe that it should work. Of course, you have to be successfully connected to a supported battery BMS. Does the battery icon flash?

On 2025/01/22 at 3:35 AM, Tomeek said:

Is this the one with the removable display non twin model?

Yes, 72.75 is for the Axpert Max E 8kW '28066 non-Twin. Hex (.inv) file is dated 2024-7-19.

On 2025/01/22 at 3:35 AM, Tomeek said:

Doesn't 90/120V stick in cloudy weather?

It should be pretty good, I believe. 

On 2025/01/22 at 3:35 AM, Tomeek said:

90V or 120V starting PV voltage?

All factory Max firmwares use a minimum MPPT voltage of 90 V, I believe.

16 minutes ago, Coulomb said:

Oh. Both of these firmwares seem to support the QDOP command, so I believe that it should work. Of course, you have to be successfully connected to a supported battery BMS. Does the battery icon flash?

Yes the icon battery is flashing, i've 2 us5000 pylontech connected with the comms cable to inverter without problems or warnings.

 

On 2025/01/18 at 10:47 AM, Coulomb said:

I only have 4 non-Twin firmwares for the Max II 8kW: 54.06 and 54.63 for the '2809 DSP, and 81.07 and 81.63. Sadly, none of these have the required support. The latest of these (54.06 and 81.07) have hex files dated 5th September 2023. We need slightly later firmware versions for the above SoC% support.

Hi Coulomb,

I am running 81.07. Do I understand correctly that 81.63 is an earlier version? (not that it matters much, if I cannot use SOC, then it is of no use to me.)

I also take it that, if you do not have the later firmware, it means that it does not exist yet...

Greetings, Kurt

Edited January 23, 20251 yr by Kurtbe

Hey , i have the inverter from the photo. In cloudy days he is stuck at 120 , can somebody help me with a new firmware. Or pached .

On 2025/02/02 at 11:06 PM, dorin said:

can somebody help me with a new firmware. Or patched .

Alas, no. I have no 75.xx for Axpert Max II 11kW '28066 Twins, and only one Max II 11kW firmware at all (65.08, dated July 2023, older than your inverter).

One day I'll try again to make a '28066 firmware from a '2809 firmware; I tried once but I don't think it worked well. I'm suspecting a difference in clock speed now; that should be easy enough to check. But I have way too much on my plate at present, sorry.

Edited February 3, 20251 yr by Coulomb

Hello, pls which fw can use for Axpert Max II twin 11k with round display, original fw is 65.06 and secondary 39.06. I have problem with 90V stuck :-( Thanks very much.

1 hour ago, grinava said:

which fw can use for Axpert Max II twin 11k with round display, original fw is 65.06...

The only patched firmware available for this issue on your model is patched firmware versions x65.08.

Edited March 8, 20251 yr by Coulomb

10 hours ago, Coulomb said:

The only patched firmware available for this issue on your model is patched firmware versions x65.08.

So it is possible flash my 65.06 firmware with this dsp_x65.08? Thank you very much ;-)

9 hours ago, grinava said:

So it is possible flash my 65.06 firmware with this dsp_x65.08?

Yes, that's the whole idea. 99.9% of the patched firmware is the same as factory firmware version 65.08, a slightly later version of the 65.06 firmware you are running now. The handful of changes are to improve the low light PV production, and to fix the premature float bug.

1 hour ago, Coulomb said:

Yes, that's the whole idea. 99.9% of the patched firmware is the same as factory firmware version 65.08, a slightly later version of the 65.06 firmware you are running now. The handful of changes are to improve the low light PV production, and to fix the premature float bug.

Many thanks, i try it next week when arrive rs232 cable :-D

@Coulomb pls info, can i flash dsp_x65.08_patched via USB OTG ? Or only with rs232? When can use usb, file on the root of usb must be called dsp.hex or mks2.hex (when my inverter is axpert max II, and solar assistant recognized him like MKS2-11000) ?

1 hour ago, grinava said:

@Coulomb pls info, can i flash dsp_x65.08_patched via USB OTG ? Or only with rs232?

The RS232 is safer than USB. USB could have sometimes connection issues. Use always RS232 for firmware flashing.

19 hours ago, grinava said:

can i flash dsp_x65.08_patched via USB OTG ?

You should be able to, yes.

19 hours ago, grinava said:

When can use usb, file on the root of usb must be called dsp.hex or mks2.hex

I believe it's mks2.hex for Axpert Maxs (and of course MKS IIs and a few other models).

invertor upgraded via RS232 to version 165.08, works great, thank you very much for this firmware ;-)

2 hours ago, grinava said:

invertor upgraded via RS232 to version 165.08, works great, thank you very much for this firmware ;-)

You're welcome 😇