This is factory firmware version 72.08 for the Axpert Max E 8kW '28066 non-Twin. Do not use with any other model or version.

Use at your own risk. The hex file is dated 23/10/2024. As of this post, it is the most recent firmware for this model, but it does not have the "presumed good" MPPT logic. As a result, low light performance may be poor. For better MPPT performance in low light, consider factory firmware version 72.75, or patched firmware version 272.66.

Firmware upload instructions for models with a removable display.

This firmware processes the QDOP command, so with suitably recent display firmware, it should support SoC% for settings 12,13, and 29 when connected to a suitable battery's BMS.

MAX_8K_72.08.7z

On 2025/03/16 at 3:50 AM, Coulomb said:

This is factory firmware version 72.08 for the Axpert Max E 8kW '28066 non-Twin. Do not use with any other model or version.

Use at your own risk. The hex file is dated 23/10/2024. As of this post, it is the most recent firmware for this model, but it does not have the "presumed good" MPPT logic. As a result, low light performance may be poor. For better MPPT performance in low light, consider factory firmware version 72.75, or patched firmware version 272.66.

Firmware upload instructions for models with a removable display.

This firmware processes the QDOP command, so with suitably recent display firmware, it should support SoC% for settings 12,13, and 29 when connected to a suitable battery's BMS.

MAX_8K_72.08.7z

Can I use this on original Axpert a mecer SOL-I-AX-8m

If your present main (U1) firmware version is 78.xx, then yes, otherwise no.