Hello, I need help I put together a 48 volt 3.2V 120Ah Lithium Iron Phosphate LiFePO4 battery pack. I had bms all hooked up everything was reading good I got 52 volts, i connected it to my growatt 3k all in one based off the blueprint on the mobile solar sight the only thing I had different was a 48 to 12 conversion box for my tong jack. I used a pre charge resistor no sparks when I connected everything then 30 seconds later sparks flying and one batter catches fire. The ground wire to the converter melted off, I’m not sure what I did wrong or where I should go from here are all the cells bad or just the ones that leaked? Where do you think I went wrong on my wiring. Please help!