DALY New K/M/S Smart BMS Wifi Module/Bluetooth/UART/ RS485/NTC/ LCD Touch Screen. DIY 13S 8P Li-ion Battery Box Holder+13S 48V 20A/30A Li-ion BMS+Welding Nickel. Daly BMS 4S-16S 12V 48V 60V 300-500A Li-ion LiFePo4 Smart BMS w/Bluetooth Module.
eBay