thank you for your quick feedback. did you open a dispute? did you try to fix the old one? can you trace back the differences, whether there is a connection between the serial number and the defect between the two bms?
sorry for my Bad English haha
hello, how did you solve the problem? I now have the same error after 2 days of use. hankzor needs to consult with the engineer. When I ask if I can continue to operate the bms with the error without being afraid, I get the answer "never mind" ?
I'm not good at soldering and would be afraid of...