June 11Jun 11 Hello everyone I am new in photovoltaics and I have just acquired an inverter, does it exist a up to date firmware for the Max II 11 kW Twin ?Mine was shipped with the version 75.01 for the Main CPU and 39.06 for the secondary CPU. Edited Friday at 08:305 days by Atac777
8 hours ago8 hr I posted about 75.85 in response to one of your other posts.The oldest 39.xx display firmware I have is 39.16; your clone has quite old firmware. The latest Voltronic 39.xx firmware I have is 39.36. I have no idea if it will work in a clone.====This is display / BMS comms (U2) factory firmware version 39.36 for the Axpert VM IV and Axpert Max Twin. Do not use with any other model or version.Use at your own risk. The hex file is dated 09/1/2026.Firmware upload instructions for models with a colour display.This firmware processes the QDOP command, so with suitably recent main firmware, it should support SoC% for settings 12,13, and 29 when connected to a suitable battery's BMS.Remote Panel_Reflash_MCU(39.36).rar
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