Axpert Max E 11K Clone?

Hello to all!

I'm Mauro from Italy

A my dear friend made a present to me: he bought from far east (aliexpress) an axpert max E 11K Twin

(in my home installation i already have two original axpert max 7200 working fine) with Coulomb and George 90V patches production yeld in the morning has really increased!!

Returning to this new inverter, i'm afraid this inverter is a probably clone

The label is marked as non twin … but it is twin

It has and external wi fi dongle called “ Solar plug RWB01” and wi fi module inside LCD panel is not installed., so cloud application is not more Wath Power , but Solar of things.

Firmware DSP 64.03 Panel 38.04 Processor is 2809

problem is that it is not working in Home assistant Syssi PIP integration

These are the tests i done:

1: my homeassitant RS232 external home made interface ( ESP01 + max 3232 ttl 3v3// RS232 UART interface) actually used in the others 7200inverter doesn't work on the RS232 port … no data …. ( waits for dongle!!)

2: another test with the display panel borrowed from an original Voltronic: voltronic cloud correctly works and all data are showed in the native voltronic application watch power .

RS232 port is still not working

So I'm afraid a firmware update is needed.

This is QPIGS report from an original 7k2 in axpert tools:

[2025-10-28 17:51:34] Send: QPIGS

[2025-10-28 17:51:35] [1704ms] Return: (000.0 00.0 229.9 49.9 1194 1190 016 387 53.00 000 089 0034 00.0 000.0 00.00 00024 00010000 00 00 00000 010È

This is QPIGS report from 11k clone in axpert tools:

[2025-10-28 17:45:36] Send: QPIGS

[2025-10-28 17:45:38] [1766ms] Return: (229.6 50.0 000.0 00.0 00000 00000 000 000 00.00 000 000 0030 00.0 000.0 00.00 00000 00000000 00 00 00000 000 0 00 0000

(this last one only powered with grid no battery no load … seems correct only last part of string is different …longer)

Protocol seems different ... in last part of string ..

BUT It works correctly works with watch power installation in my PC windows also in RS232 interface ,

but not yet in Home assistant .... the response to QPIGS commands is not understood by home assistant which reports ""UNKNOWN"

I also updated DSP and display with late firmware : same rusults

I believe protocol is written in 24c256 eeprom located near microcontroller in DSP 2809 board, i also have an image of this eeprom found on the net,

but i'm sure i will loose my serial number and will soon obtain F90 error in next future

Some one knows location of the eeprom where SN is written ?

, i could edit eeprom file and insert directly it in my file ..

is this possible?

Some ideas?

Thank you all of you for the kindness

Edited November 22, 2025Nov 22 by Maurorr