On 2024/10/22 at 2:11 AM, mdaverio said:

i'm interresting to update my Axpert II 10kWh with this files. Goal : 90V issues !
But before, i would like to be sure that they are compatible with my device.

Data :
Main CPU : Firmware Version 82.02

I finally found firmware version 82.07 for the Axpert Max II 10kW '28066 non-Twin. So I've now patched it.

This is patched firmware version x82.07, based on factory firmware version 82.07 for the Axpert Max 10kW '28066 non-Twin. Do not use with any other model. The original hex (.inv) file is dated 23/10/2024.

This firmware works around the "stuck at 90 V" problem with a suite of patches, including changing the current threshold from 0.50 A to 0.10 A. It also fixes the premature float bug, and changes the reported version number to x82.07 (e.g. 382.07). The front panel display will continue to show version U1 82 07. It also optionally changes the PV voltage at which charge current starts derating from 360 V to 450 V.

Use at your own risk; I cannot test this firmware as I do not own an Axpert Max. It has been "sanity checked" by disassembling the firmware and confirming that the intended changes are present.

Firmware upload instructions. https://forums.aeva.asn.au/viewtopic.php?p=87767#p87767

Choose the minimum MPPT voltage that is higher than your working panel voltage even in poor light. With each pair, the one with the derating PV voltage change is the one with the higher first digit.

dsp_282.07_patched.inv: Minimum MPPT voltage 200V, no derating PV voltage change.

dsp_382.07_patched.inv: Minimum MPPT voltage 200V, derating PV voltage changed to 450 V.

dsp_182.07_patched.inv: Minimum MPPT voltage 150V, no derating PV voltage change.

dsp_582.07_patched.inv: Minimum MPPT voltage 150V, derating PV voltage changed to 450 V.

dsp_882.07_patched.inv: Minimum MPPT voltage 90V, no derating PV voltage change. For extremely low panel voltage.

dsp_982.07_patched.inv: Minimum MPPT voltage 90V, derating PV voltage changed to 450 V. For extremely low panel voltage.

dsp_original_82.07: Unpatched factory firmware version 82.07.

dsp x82.07_patched Max II 10kW non-Twin.zip

Edited May 29May 29 by Coulomb
Added zip file, duh.

Hello, Trust you are well.

I have a kodak inverter OG-10 non twin. I am in need of the panel flash firmware 35.03 please.

Can someone assist.

Regards

DTN

22 hours ago, Denash said:

I am in need of the panel flash firmware 35.03

Strangely, I have no 35.xx display firmwares in my collection at all.

If you are DESPERATE, you could try the latest 22.xx display firmware. I have no idea why there is more than one Max II (and VM IV) non-Twin display firmware, and what the consequences are of mixing them.

This is factory display (U2) firmware for the Axpert Max II (with colour display, NOT the removable display) or Axpert VM IV, non-Twin. Do not use with any other model. This display firmware may or may not work with models that come with display firmware 35.xx. Use at your own risk. Hex file is dated 16/May/2024. It has the QDOP command, so when paired with suitable DSP firmware and connected to a battery BMS, three settings should use SoC% instead of battery voltage when using the display directly (not via monitoring software, I believe).

Remote Panel_Reflash_MCU(22.25).rar

Hi, thank you for the above firmware, its highly appreciated.

Tried to load bot not going through.

I think the MCU board could be damaged.

Will check for a new one.

Regards

DTN

Hi everyone,

I'm new to the forum and hoping someone can assist. I suspect my 10 kW Kodak OG-10.0 inverter may have an AC-input synchronization or relay-timing issue.

The inverter is currently running Main CPU firmware 82.07 and Secondary CPU firmware 35.03. I've come across several discussions suggesting that firmware version 82.63 may resolve unexplained tripping problems.

Could anyone confirm whether firmware version 82.63 is compatible with my inverter, and whether it is likely to address this issue?

Thanks in advance for any advice.

On 2026/06/12 at 4:34 PM, Kevin1 said:

Could anyone confirm whether firmware version 82.63 is compatible with my inverter, and whether it is likely to address this issue?

It should be compatible, despite 82.07 being a few months later than 82.63. 82.07 has more complex checking of the EEPROM contents, which I think is an attempt to behave properly with various EEPROM layouts.

82.63 has the "presumed good" MPPT logic, meaning that it's not as good as patched MPPT firmware for solar production, but is better than most factory firmwares.

The good news is that you can revert back to 82.07 if needed. There is also patched x82.07. That zip file also has factory firmware version 82.07.

It would be good to hear from owners running 82.xx firmware, to be sure of compatibility. I'm 99% sure that no harm will come of trying 82.63, and reverting if problems seem to arise.