Hello, I do have a clone of AXPERT MAX II 2 MPPT on which I have installed firmware 90.09 with 200V.
So you advise me to install firmware 556.05.

7 hours ago, Septain21 said:

So you advise me to install firmware 556.05.

Yes. Or 256.05, since you are already running a 280 V patched firmware. Though if that was without the 200 V string, 556.05 may be better. Unfortunately, with these types of patched firmwares, it's trial and error. It's possible that in later MPPT patches you won't have to choose the minimum voltage (one size fits all).

Hello friends, greetings from Bulgaria!
I have an inverter EaSun SMW 8KW and i also have trouble sleeping on 90 volts.
Can you tell me which firmware is suitable for my inverter.
Here are pictures of a model and the software it currently has.

Thanks!

 

Edited July 26, 20242 yr by radoslaf

Main CPU firmware version 72.04 means that you have the '28066 DSP and the Max E 8kW model. So any patched firmwares in this section that are for the '28066 DSP and for the Max E model should work, e.g. version 272.66.

https://forums.aeva.asn.au/viewtopic.php?p=98208#mppt_8kW

Hello friends!

I had one cable that turned out to be faulty and I couldn't flash it with it.

Unfortunately, I only find such a cable here, and I don't know if it will work with it.

How do you think it will do with this cable?

Thanks!

2 hours ago, radoslaf said:

How do you think it will do with this cable?

No, this cable will NOT work with an Axpert inverter, although you could probably cut the cable and re-join the wires in the correct order.

You are supposed to use a USB to RS-232 adapter, which will end in a male D9 connector. This should be plugged into the D9 to RJ-45 cable that should have come with your inverter.

There is a standard for using RS-232 on an RJ-45 connector, and Voltronic don't use it. I wonder if the Cisco routers use the standard; I would hope so.

Edit: See this post or this post for known working adapters available in South Africa.

Edited August 3, 20241 yr by Coulomb

On 2023/05/21 at 7:00 AM, birdibird said:

There is now an original 46.71 on the MPP Solar website:

https://www.mppsolar.com/v3/8048maxmppt/

That firmware seems to have vanished, and this firmware seems to be the only Max E 8 kW '2809 non-Twin firmware with the "good" solar charge logic, so I'll post the update file here.

This is factory firmware version 46.71 for the Axpert Max E 8 kW '2809 non-Twin. Do not use with any other model. The update file has "PV voltage stuck at 90v" in one of the paths, suggesting that it solves this problem. It also has "U1 90.01" in the path, but that seems to be a copy and paste error. I removed "U1 90.01" from the zip file name to reduce confusion.

I was initially sceptical, but have now decided based on user reports that this problem has finally been solved. I note that later firmwares have dropped these changes.

Use at your own risk.

Firmware upload instructions for models with a removable display.

8K MAX - PV voltage stuck at 90v_DSP_4671-20230521T034350Z-001.zip

Edited August 24, 20241 yr by Coulomb

On 2023/05/03 at 5:59 AM, sharkut said:

New firmware 72.68 freshly published !

Now presumably obsoleted by 72.74.

This is factory firmware version 72.74 for the Axpert Max E 8 kW '28066 non-Twin. Hex file is dated 2024-3-05. Do not use with any other model. This does NOT have the presumed "good" solar charge control logic that would fix the "stuck at 90 V" issue. Use at your own risk.

Firmware upload instructions for models with a removable display.

MAX_8K DSP_72.74.7z

My experience:

 

Axpert Max 8k 28066

Both solutions worked for me for the stuck 90V problem!

If you are brave enough, disconnect the solar connector from the additional power supply and the factory: 72.66 FW
(Consumes approx. 40 W from grid or battery, even in sunlight)

If you don't want to install it electrically... 272.66 CFW could be the solution

PS: (If the RGB LED is turned off by the user before the firmware update, then the RGB LED will glow dim red after the update.
Turn on the led strip before updating, and turn it off after updating... if you don't want to see it!!)

 

 

Edited August 31, 20241 yr by Tomeek

Hi,
 I also have 2 Easun inverters with small problems and please help me if possible.
The first is an Easun Isolar 11kW, 48V and whose own consumption is very high (around 100-120W). Probably because of the fans that run at high speeds all the time. Is there any firmware for it to reduce self consumption ?
The second is an Easun IGrid SV II 5kW, 48V and which does not support lithium batteries (battery voltage range). Is there a firmware that solves this problem?
if somehow I got the topic wrong, I apologize. thanks in advance
@ Coulomb - I am extremely impressed with your work.

On 2022/10/22 at 9:12 AM, Coulomb said:

Ok, that blows my earlier theory. 

Maybe when the grid is connected, the firmware keeps a small power coming in from the grid, so that common drops in load don't burp energy back into the grid. 

When the grid is disconnected, that power comes from PV instead, dropping the PV voltage if the sun is weak. 

100% right sir

On 15/11/2022 at 16:41, Georg594 said:

Oggi ho ricevuto un nuovo EASUN da 8 KW

è dotato del firmware 46.08 principale e 12.21 secondario.

flash senza problemi al firmware basato su 90.06 (90.09)

 

 

Ciao georg594, ho inverter 8k master Power stesso come dalle foto però verde di colore con versione software originale  U1 46.08  U2 112.15  ho fatto aggiornamento su U1 alla versione 9021, versione con tempo nuvoloso, ho notato che il blocco a 90 V non si verifica piu', ma a 115 V,  

Ho 1 stringa da 10 pannelli voc 370 V a sud-est 

 1 stringa da 8 pannelli voc 296 V sud - ovest

Quale versione mi consiglieresti ?

 

 

Hello friends, greetings from Ukraina!
I have an inverter Axioma ISMPPT BFP 8000and i also have trouble sleeping on 90 volts.
Can you tell me which firmware is suitable for my inverter.
Here are pictures of a model and the software it currently has.

Thanks!

11 hours ago, Sanyas15 said:

I have an inverter Axioma ISMPPT BFP 8000and i also have trouble sleeping on 90 volts.
Can you tell me which firmware is suitable for my inverter.

The only patched firmware for your model is at present version 281.05. This is a 200 V minimum MPPT version, so DO NOT use this if you have panels that routinely operate best below 200 V. I note that your display photo shows PV1  voltage as 88 V, suggesting that you have few panels on that MPPT. I would not use the 200 V patched firmware with fewer than 6 panels (assuming 72-cell panels, but high wattage panels these days probably have many more cells than that). Your Voc (panel voltage with normal sun and no load) should be at least 260 V.

If you have a lower Voc than that and adding panels is not practical, let me know what panels you have and I may be able to produce a lower voltage patch.

The photo was taken in the evening, so the voltage is 88V. I have two strings of 9 panels of 48V each, so during the day the voltage of the string is more than 360-380V. Here is a photo from this morning.

Edited November 30, 20241 yr by Sanyas15

Hello friends, greetings from Ukraine!
I have an Axioma ISMPPT BFP 8000 inverter. I know that the component base is similar to MPPT Solar, Altek, Qpawer, and I have a question, is it possible to reflash it with firmware to the 11 kilowatt version? I looked at the reviews, the power elements of 8 and 11 kilowatts match. Maybe someone has already done this upgrade?
Can you tell me which firmware is suitable for my inverter. I would be very grateful if someone gives a detailed comment.
Here are photos of the model and the software that it currently has.

On 2024/12/10 at 1:03 AM, Artur said:

I have a question, is it possible to reflash it with firmware to the 11 kilowatt version? I looked at the reviews, the power elements of 8 and 11 kilowatts match.

I'm not sure that it's merely a firmware change. There may be subtle changes, like to air flow, PCB trace augmentation, more silver on the relay contacts etc, that makes this unsafe. But if someone knows more, I'd be very interested.

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)

Edited December 12, 20241 yr by Tomeek

12 hours ago, Tomeek said:

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

Mangling of the serial number to the "null" number of 55355535553555 is quite serious. It could lead to fault code 90 down the line.

Does the serial number appear correct again if you go to one of the other firmwares, or is the loss of serial number permanent? If not permanent, it would mean that the serial number is not stored at the same address in the EEPROM in versions 72.72. I'm surprised that 72.72 behaves differently to 72.74; at first glance, they seem to be using the same addresses.

12 hours ago, Tomeek said:

Can't find a job or are you looking for it very often

I don't understand this sentence; perhaps a bad translation?

12 hours ago, Tomeek said:

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

Do you mean you want it to show the SoC from the BMS instead of its usual very bad voltage-based guess? If so, you need the BMS cable connected, although Solar Assistant and possibly other monitoring software might be able to fix this if they connect to the BMS.

If you mean you want to be able to use SoC% in settings 12 (back to utility), 13 (back to battery), and 29 (low battery cut-off voltage), then you need main and display firmware that processes the QDOP command. I may make a list of these. Only firmwares released recently (I forget the cut-off, perhaps late 2023?) will have this.

12 hours ago, Tomeek said:

This is original Axpert max 8kW (display removed)

Did you mean to post an image here? Or do you mean that you are somehow bypassing the removable display? I don't recommend doing that, as some commands are subtly different between the ones you see via the display, and the ones you get connecting directly to the DSP.

Quote

Does the serial number appear correct again if you go to one of the other firmwares, or is the loss of serial number permanent? If not permanent, it would mean that the serial number is not stored at the same address in the EEPROM in versions 72.72. I'm surprised that 72.72 behaves differently to 72.74; at first glance, they seem to be using the same addresses.

It is displayed correctly again on other firmware

 

Quote

 don't understand this sentence; perhaps a bad translation?

Sorry, I was tired

No clouds, no shade. PV voltage fluctuates between 200-300V every 5-10 seconds (VOC 340V)  272.66

 

Quote

If you mean you want to be able to use SoC% in settings 12 (back to utility), 13 (back to battery), and 29 (low battery cut-off voltage), then you need main and display firmware that processes the QDOP command. I may make a list of these. Only firmwares released recently (I forget the cut-off, perhaps late 2023?) will have this.

Yes, that's I understand. But with the properties of 172.62. (It has no fixed voltage and the PV current is 0.25A)

 

Quote

Did you mean to post an image here? Or do you mean that you are somehow bypassing the removable display? I don't recommend doing that, as some commands are subtly different between the ones you see via the display, and the ones you get connecting directly to the DSP.

I'll forget about that then

Edited December 13, 20241 yr by Tomeek

3 hours ago, Tomeek said:

[ serial number ] It is displayed correctly again on other firmware

Phew!

I guess 72.72 is deprecated then.

72.74 is 6 months later, and seems to have fixed that serial number problem, but is missing 6 commands compared with 72.72, and one of those is QDOP. Hence 72.74 does not have the ability to use SoC% for settings 12, 13, and 29.

The latest 72.xx firmware with QDOP and the "presumed good" MPPT logic is 72.66, now about 21 months old.

I'll see if I can patch 72.66 with the 0.25 A change, a la 172.62. This might be the best we can do for any firmware: the "presumed good" logic plus halving the current threshold. Maybe slashing the current threshold to a tenth as in 90.08 etc is too much.

Just now, Coulomb said:

I'll see if I can patch 72.66 with the 0.25 A change, a la 172.62.

@Tomeek, thanks for the detailed testing. It seems that 0.50 A (as per factory firmware) is too high a current threshold, and 0.05 A (as per Georg594's original 90.06 based patches) may be too small. 0.25 A seems to be best for you, but perhaps some lower value yet larger than 0.05 is better still.

In the pursuit of the ideal current threshold, I've made MPPT1 0.25 A as requested, and MPPT2 half that at 0.12 A. That's still 2.4x large than 0.05 A. No other MPPT patches are made. The only other changes are that the firmware reports version 372.66 to monitoring software, and the premature float bug is fixed. Tomeek or others, if you could compare the performance of MPPT1 versus MPPT2 and report the results here, that would be great.

I'm happy to make another patched version with whichever current threshold seems to work best, for both MPPTs. It's comparatively little extra work now that I have 372.66 written.

 

This is patched firmware version 372.66 for the Axpert Max E 8 kW '28066 non-Twin. Do not use with any other model or chipset. It is the latest of the available 72.xx firmware versions that has the "presumed good" MPPT logic, has the QDOP command, and does not have the bug with reading the serial number. The current threshold for MPPT1 is reduced from 0.50 A to 0.25 A, and for MPPT2 from 0.50 A to 0.12 A. Use at you own risk.

Firmware upload instructions for models with a removable display.

dsp 372.66 patched 25 12 Max E 8kW 28066 non-Twin.zip

Thanks!

I will try it soon. Today I updated about 10 times (test).

MPPT 2, (200V) 30' east, the other MPPT 1, 10' south (340V)

I will replace it in 1-2 days and we will see which one is better. (0.25A-0.12A)

Now the best 172.62 
(Unfortunately there is no % soc )

I will apply soon..

I am very grateful for your work.

On 2024/12/11 at 5:47 AM, Coulomb said:

I'm not sure that it's merely a firmware change. There may be subtle changes, like to air flow, PCB trace augmentation, more silver on the relay contacts etc, that makes this unsafe. But if someone knows more, I'd be very interested.

If you check the marking of the mppt board, it coincides between the 8 and 11 kilowatt versions.  check the low-voltage transistors on the battery and they match.  .  The only difference is in the marking of the sine cut transistors.   It's just that I have a 5-kilowatt solar field, and in the 8-kilowatt version, the limit is exactly 4,000 watts.  Therefore, if someone asks for 8 by 11, write.

Hi everyone, it's definitely not the right topic and I apologize in advance, has anyone of you managed to get the Easun SV2 inverter to communicate with Home Assistant with the SP32 D1 Mini with RE232, or found something online but once connected it sees it but it gives me all the zero data, I'll leave some photos to help you understand better, thanks in advance and sorry if it's not the right topic