Sebastian788

OK. I'll try with the new RS-2323 converter. I'll report back.

I've tried 56.72 from this link https://drive.google.com/file/d/1xeMlnAYGXQ8v7O-j6gIBgiLYeLFvQ06G/view At the moment inverter is still accepting loading a firmware but it's failing every time. Even if i try to upload the same firmware it will fail in two different stages (ie first at 7% and then at second attempt at 23%), so maybe it's a problem with RS232 converter that I use (I'm using RJ45-DB9 cable supplied with inverter plus RS232 converter). Sunmart company don't have any support at all. I think only option now is to get firmware from the same unit (somehow download it?) and then load it to my inverter.

Hi. As per topic I'm looking for Sunmart IV Twin 6kw firmware. The current firmware loaded is 56.02 and I've tried to upgrade it with 56.xx available on this forum. It loaded with an error and now my inverter is bricked. Can someone please share original sunmart firmware?

Try this. Log into JK BMS app, go to settings and set UART1 to (007) Voltronic protocol. Set inverter battery type as (05) LIB. This should enable communication between inverter and battery pack.

When you tried to connect with your PC using RS485 did you choose correct protocol in UART1 ?