Firefly International Energy, USA has developed a real-time & novel active battery management solution known as Battery
equalizing and Monitoring System (BEMS). It equalizes old and new batteries connected in series string while extending battery life & provide more energy by preventing premature battery failure like battery dry up.



  • Auto calibration for number of batteries in string.
  • Accurate balancing up to ±5mVpC .
  • Voltage sense resolution of 0.5mV/ VPC
  • High balancing current up to 6A for faster equalization.
  • Parallel & fast equalization of low batteries in string.
  • Sub-strings can be cascaded for string voltages higher than 48V.
  • Battery undervoltage & overvoltage fault indication.
  • External relay compatibility for enabling shutdown.
  • IP67 design.