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Battery Back-up Exchange Box

SKU: MTS-BE25A Category:


  • Easy hook up Battery Backup Exchange Box with 
13.8 V DC INPUT Source.
  • In normal operation, the DC load is powered by the 13.8 V DC INPUT (permanent source).
  • When the 13.8 V DC permanent source is accidental cut-off, the unit will switch to use the 12 V Battery (by Voltage Comparator Circuitry) to power up the DC load for Backup purpose.
  • The unit is designed to accept a voltage range 11 – 15 V DC at the 13.8 V DC INPUT.
  • While powering up the load, at the same time, the 13.8 V DC INPUT will deliver a small charging current to maintain the 12 V battery’s state of charge.


Input Voltage

13.8V DC

Input Voltage Range


Output Load Current

25A (Continuous)

Max. Charging Voltage

12.5V DC (@13.3V DC Input); 13.0V DC (@13.8V DC Input); 14.2V DC (@15.0V DC Input)

Max. Charging Current