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Battery Charger and Control System

Espey designed and manufactures this battery charger and control system consisting of a charger assembly and a battery rack assembly. This system provides starting power and control systems power to a shipboard Emergency Diesel Generator (EDG). In addition, the charger assembly also provides conditioned 24 VDC to the EDG Auxiliary Logic Controller during “normal power” as well as emergency situations.

Electrical Specifications

  • Charger Input: 440 VAC nominal, single phase, 2 kVA maximum, 4.5 A maximum, .8 lagging to .95 leading PF
  • Charger Output: Charger: 27 V (adjustable), 0 to 50 Amps
  • Aux Output: 24V nominal, 0 to 4 Amps
  • Battery Connected Load: 850 Amp maximum

Mechanical Specifications

  • Combined Weight: Approximately 1020 lbs when loaded with batteries
  • Shock: MIL-S-901 Grade A
  • Vibration: MIL-STD-167-1, Type I, from 4 to 15 Hz
  • Enclosure: IP54
  • Cooling: Natural convection


  • Multi Stage Charging Algorithm
  • LCD User Interface
  • LED Status Indicators
  • Manual and Automatic Control Mode
  • Output voltage adjustable
  • Communication via Profibus DB, 500 Kb/s
  • Programmable Low Voltage Shutdown prevents full battery discharge
  • Temperature Compensation maximizes battery life
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