Daly SMART LiFePO4/LFP 4 Cells (4S) 12V(12.8V) 100A BMS - Bluetooth & Balancing

High Current Smart BMS

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Available Options


  • 1m long balance cables (5 pin)
  • New Bluetooth module with Wake-Up Button
  • Temperature sensor (NTC)
    • If any cables are incorrect the unit will be permanently destroyed, the video instruction guide demonstates how to test this BEFORE connecting the plugs into the BMS

The 4S 100A SMART BMS is for LiFePO4 cells only.  You MUST use 4 cells in series and they MUST be LiFePO4. This BMS is ideal for a 1000W inverter.

  • Using top quality (A-level) protective integrated circuit IC, from Seiko of Japan. The IC itself has power a balancing function. The circuit is simple and reliable
  • Strong load ability, high constant discharge current, using high voltage tolerant and ultra low resistance power MOSFETs. Daly's extra large heat sinks and sealed thermal coating greatly assist cooling
  • Voltage detection for each cell so each cell will be protected from over charge or over discharge. The over current and short circuit protection function is a built-in feature to preserve the life of both the BMS and cells.
  • Temperature protection during charging and discharging
  • Extremely low power consumption. The consumption of the whole device is between 50 - 600uA depending on the model without Bluetooth. While the Bluetooth module is on, 15mA.
  • Look up SMART BMS by DalyBMS on the Android Play Store or iOS App Store
    • Monitor state of charge
    • Current in/out (IMPORTANT - Current less than ~1A ignored)
    • Power in/out
    • Temperature
    • Charge/discharge MOSFETs open/closed
    • If balancing
    • Individual cell voltages, overall voltage, maximum cell voltage, minimum cell voltage, differential voltage
  • Please see the "Download Manual" link under the main product image for all specifications


Continuous Discharge Current: 100A

Charrge Voltage: 14.6V

Continuous Charge Current 50A

Overcharge Voltage 3.75V

Overcharge Release Voltage: 3.55V

Balance Detect Voltage: 3.35V

Balance Current: 30mA

Over Discharge Voltage: 2.7V

Over Discharge Release Voltage: 2.9V

Over Charge Current: 100A (1 second)

Over Discharge Current: 150A (1 second)

Short Circuit Delay: 320 uS

Charge Temperature: 3 to 50C

Discharge Temperature: -15 to 55C

Self Consumption (with Bluetooth): 15mA

Main Circuit Resistance: <20 mOhm

Over Discharge Current: 50uA

Working Temperature Range: -20 to 70C

Daly guarantee a 3-year product warranty, if the damage is caused by improper operation, we will conduct the repair with charge.

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