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I would normally offer suggestions on firmware versions, but the VM III series is so chaotic that I have no idea what's going on. I might be able to research this topic, but it will be very time consuming, and other projects are far more urgent at present.
I don't even have a single 71.xx firmware for a VM III, other than 71.03 itself. It's from March 2024.

Each brand name of voltronic inverters has a different firmware version with slightly different features. I recommend going through this post so you understand the concept
Collection of DSP Axpert Firmware for VM III TWIN and VM IV TWIN
If your inverters are not clowns, you can use any available version for the specific models, and please note that the latest firmware for Axpert VM III 4k,6K Twin which was released for TribleA brand is 60.10.

I have been waiting for a similar response to this topic for a week, and unfortunately, the response was in an old version. If you find the latest version, I hope to publish it. Thank you very much.

Hello All,
I have got recently Axpert VMIII 4K twin. It has the main CPU firmware version is 00071.03, and the secondary CPU firmware version is 00057.16
Do I have the latest firmware for this inverter?
Thanks