HBJ 4S-8S 50A Smart BMS with Bluetooth for 12V & 24V Li-ion and LiFePO4

The HBJ 4S-8S 50A Smart BMS is a compact, metal-enclosed battery management system for lithium-ion and LiFePO₄ packs from 4 to 8 cells in series, covering both 12V and 24V systems with Bluetooth app monitoring. It brings smart monitoring to the most common small lithium packs. A 4S LiFePO₄ pack (12.8V) is the standard 12V lithium battery, and 8S LiFePO₄ (25.6V) or 7S Li-ion (25.9V) the standard 24V one - this single board handles all of them, with chemistry and cell count set through the app. 50A continuous discharge gives about 640W at 12V and 1,280W at 24V, enough for 12V and 24V inverters up to roughly 1,000W, solar storage, UPS banks, e-bikes and portable power stations. The Bluetooth app shows every cell voltage, pack voltage, current and BMS status in real time. On a 12V or 24V pack that means you can see state of charge and cell balance at a glance, and catch a weak cell before it shortens runtime or trips the pack. The metal enclosure protects the electronics from knocks, dust and vibration, making the board equally at home in a fixed solar install or a vehicle. The common-port design uses one pair of high-current terminals for both charging and discharging, which keeps wiring simple for solar and backup setups where the charger and load share a connection. Protection covers overcharge, over-discharge, overcurrent and short circuit, with cell-level monitoring. For loads above 50A - larger 24V inverters and high-power EVs - the HBJ 4S-8S 100A smart BMS is the step up.