Auto Charge D2

Product Code: 091-74-12


  • 33A total: 28A battery charger, 5A battery saver
  • Designed for DDEC Vehicles
  • Automatic operation regulates output to 3 battery banks
  • A patented built-in sense circuit checks battery voltage 120 times per second to compensate for voltage drop in charging wires providing quick re-charge, with no overcharge
  • Separate 5A "Battery Saver" output eliminates drain on vehicle battery when in station
  • Designed for rigors of emergency vehicle use; heavy duty aluminum case 
  • 3 year warranty

Battery Saver is not recommended for powering highly sensitive electronic loads

The Auto Charge D2 is a triple battery system automatic battery charger designed especially for vehicles with a DDEC engine control, a dual battery system and a separate engine battery. These vehicles have a unique problem. The vehicle may have a number of batteries in parallel in order to obtain sufficient capacity for the electrical loads. These batteries may be organized into two banks to provide redundancy. The engine usually has only a single battery isolated from the vehicle battery and dedicated to powering the engine electronic controls. This configuration requires a dual, high output charger for the two banks of vehicle batteries and a smaller charger to maintain the engine battery. 

The Auto Charge D2 provides 25 amperes to the 2 banks of vehicle batteries. Each bank is individually controlled, charged only as much as required. In addition, a 3 ampere charger maintains the engine battery.

A triple bar graph display is provided to indicate the state of charge of each battery. The display is conveniently labeled "BATTERY 1", "BATTERY 2" and "ELECTRONICS" battery. 

A 5 ampere "BATTERY SAVER" is provided to power rechargeable hand lights or other accessories. The "BATTERY SAVER" automatically disconnects these accessory loads from the battery and powers them from an internal power supply. This removes the accessory loads from the battery during charging.

Charger with Battery Bank Triple
Charger, Output Amperage 28
Battery Saver 5 Amp
Charger, Input Voltage VAC 120
Charger- Hz 50/60
Input Fuse 12 Amps, Fast Acting
Input 120 Vac, 50/60 Hz, 8 Amps Max
Output Vehicle Battery - 12 Vdc, 25 Amp, Engine Battery - 12 Vdc, 3 Amps
Output Fuse Vehicle Battery - 50 Amps (Part Number: 090-0050-0), Engine Battery - 6 Amps
Warranty 3 years
Weight 28 lbs
Charge Indicator Remote Triple Bar Graph Display
Battery Saver Overload Indicator Indicates Battery Saver Exceeded 5 Amps
Power Indicator Indicates Input Power Applied
EV Series no