Hi,
I have a 5 kva inverter like axpert with 80 A MPPT controller ( no name brand) it had 72.90 version and today it stops running and show error 90. I tried to flash but the reflash tool stops with connect fail see attached .pictures. I test the communication with monitoring tool and it works. I changed the cables etc Please let me know if you have any ideea why I cannot conect to inverter.
P.S: the inverter is made for Europe.
Thank you