Hello. Please help me to determine which parts I have burned out. This is a bafang BBS01 or BBS02 idk new version 48V 750W C571-30-512 controller. I d

[Hardstyle2R]

Hello. Please help me to determine which parts I have burned out. This is a bafang BBS01 or BBS02 idk new version 48V 750W C571-30-512 controller. I don't know its history, I got it like this. Thank you.

 

[Sabhan]

هل عكست اقطاب البطارية ام حاولت تشغيلها بدون شاشة