12V 4S 20A LiFePO4 Battery Management System Smart Protection for 12.8V Battery Packs

The 12V 4S 20A BMS is engineered to deliver dependable, intelligent protection for LiFePO4 battery packs. With a high-efficiency 18A charge/discharge capacity and precision cell balancing, it ensures optimal performance and longevity.

Fast-reacting safety circuits cut power in milliseconds to prevent damage, while auto-recovery and thermal protection make it maintenance-free and reliable. Whether used for solar energy systems, e-bikes, or DIY battery projects, this BMS offers robust performance and peace of mind.

Built from high-quality components with a compact layout, it’s the ideal solution for maintaining your 12.8V LiFePO4 packs safely and efficiently.

Technical Specifications:

Battery Type: LiFePO4 (Lithium Iron Phosphate)
Configuration: 4S (12.8V nominal)
Max Continuous Charge Current: 18A
Max Continuous Discharge Current: 18A
Charging Voltage: 14.6V (CC/CV)
Balance Voltage (per cell): 3.6V
Balance Current: 50mA
Overcharge Detection: 3.75 ± 0.05V
Overcharge Release: 3.6 ± 0.05V
Over discharge Detection: 2.1 ± 0.05V
Over discharge Release: 2.3 ± 0.05V
Overcurrent Protection: 56A ± 10A
Short Circuit Response Time: ≤320 µs
Over temperature Cut-off: 65°C
Recovery Temperature: 45°C
Protection Type: Auto Recovery