Eissa

Here are some schematics that I reverse engineered from Anern Victor Max 10.2kW inverter. Should be very similar to Axpert VM models. Of course, part references and connector pinouts are different. Also ADC and GPIO assignments do not match genuine Voltronic's.
The SCC board schematic is complete - PV boost circuit, voltage and current measurement, AC power supply and bus soft start circuit.
Then there's a schematic of the two power supplies on the main board - this inverter uses an auxillary 150V power supply to start from the battery.
Also a I attempted to trace the analog part of the control/DSP board. This was little bit harder as there were no printed part references on the board. But all op-amps are there, nothing important (for understanding the circuit function) should be missing. [15/Aug/2025 added the remaining "digital" part]
I think there will be some errors, so every feedback is appreciated. I can provide KiCad project files if anyone is interested.

MAXE11K_TWIN_DSP_78.11(1).7z

MAXE11K_TWIN_DSP_78.11(1).7z

I give the sun performance a 3. Compared to the 64.62 firmware for 90 volts. I liked it. But the display firmware is completely raw. Can anyone help?

Ok, I'll forego "doing it properly" for expedience. I recently discovered that a lot of what I thought I understood about the MPPT code was wrong, so it's even more work to do it properly than I thought.
Perhaps another time. For now, I really want to keep my patching scripts out of the hands of the cloners, if at all possible.
These are patched firmware versions x11.05, based on factory firmware version 11.05 for the Axpert Max E 11kW '28066 Duplex. Do not use with any other firmware; in particular, not with any non-Duplex model. Duplex models have extra hardware for switching two AC-in sources, possibly in addition to two AC-out ports. The patched firmwares apply all of Georg594's original 90.06 patches to work around the "stuck at 90V" issue. They also fix the premature float bug, and return a version number like 211.05 from monitoring software. Use at your own risk.
dsp_211.05_patched.inv contains version 211.05 forces the minimum MPPT voltage to 200V.
dsp_211.05_patched.inv contains version 111.05 forces the minimum MPPT voltage to 150V.
dsp_211.05_patched.inv contains version 911.05 forces the minimum MPPT voltage to 90V, as does the original, but it applies all the other patches (reduced current threshold, etc). Use only for systems with very small PV arrays, e.g. 4 72-cell panels per MPPT.
dsp_original.inv contains the unpatched factory firmware version 11.05.
The .inv files are just hex files, but irritatingly the Arena reflash tool looks for the .inv extension unless you override it.
Firmware upload instructions for models with a removable display.
dsp x11.05 Max E 11kW '28066 Duplex patched.zip

These are patched firmware versions x11.06, based on factory firmware version 11.06 for the Axpert Max E 11kW '28066 Duplex. Do not use with any other firmware; in particular, not with any non-Duplex model. Duplex models have extra hardware for switching two AC-in sources, possibly in addition to two AC-out ports. The patched firmwares apply all of Georg594's original 90.06 patches to work around the "stuck at 90V" issue. They also fix the premature float bug, and return a version number like 211.06 from monitoring software. Use at your own risk.
dsp_211.06_patched.inv contains version 211.06 forces the minimum MPPT voltage to 200V.
dsp_111.06_patched.inv contains version 111.06 forces the minimum MPPT voltage to 150V.
dsp_911.06_patched.inv contains version 911.06 forces the minimum MPPT voltage to 90V, as does the original, but it applies all the other patches (reduced current threshold, etc). Use only for systems with very small PV arrays, e.g. 4 72-cell panels per MPPT.
dsp_original.inv contains the unpatched factory firmware version 11.06.
The .inv files are just hex files, but irritatingly the Arena reflash tool looks for the .inv extension unless you override it.
Firmware upload instructions for models with a removable display.
dsp_x11.06_patched Max E '28066 Duplex.zip