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May 20, 2022

Heavy Duty Industrial, Marine, and Military 12 Volt Battery Chargers for use in 72V systems. 5 year warranty.

For more DC/DC battery chargers

A DC input lead acid battery charger with 72 volt input to charge 12 volt batteries. Either 2 or 3 stage charge, which is user selected. Note, all the products below are conformal coated, and they are suitable for use in marine environments.
DC-DC Converters Heavy Duty
20 Amp
DC to DC Battery Charger
72V to 12V DC/DC battery charger, heavy duty industrial and military
Marine Grade IP66 water tight
20 Amp
DC to DC Battery Charger
72V to 12V DC/DC battery charger, heavy duty industrial and military
Ruggedized with wide temperature range
20 Amp
DC to DC Battery Charger
72V to 12V DC/DC battery charger, heavy duty industrial and military
Part Number
and Price
Allow up to 45 days for manufacturing
Allow up to 45 days for manufacturing
Allow up to 45 days for manufacturing
Country of Origin Canada, NAFTA eligible
Input Voltage 65 to 90 VDC
Nominal Input Voltage 72V
Max Input current at No Load mA
Float Voltage 13.6VDC
Absorption Voltage 14.4VDC
Switch to Float Current 3A
Max Output Current(s) 20 Amps
Voltage Adjustment ±1 Volt
Max Output Power 300W
Output current limit? Yes
Operating Temperature Range -25°C to +40°C
(-13°F to +104°F)
-25°C to +40°C
(-13°F to +104°F)
-40°C to +55°C
(-40°F to +104°F)
Derating 2.5% per °C up to +50°C 2.5% per °C up to +50°C 2.5% per °C up to +85°C
Efficiency at maximum output >75 %
Line Regulation <±0.05V
Load Regulation <±0.05V
Switching frequency kHz
Output ripple noise <25 mV rms
Noise inserted on the input terminals <25 mV rms
Isolation Fully isolated to 1500VDC input-output, 1500VDC output-ground, 500VDC output-case
Low input voltage alarm 65V
Remote power on/off No
Input Fuse MDA-10
Connections Screw terminals output
Wire leads input.
Protection Input Undervoltage, Output Over Voltage , Current Limiting, Short Circuit (automatic recovery), Reverse Polarity , Over Load, Over Temperature Shtudown
Dimensions 244 x 208 x 64mm (9.6x 8.2 x 3.5 inches)
Weight 3.4 Kg (7.5 pounds)
Audible Noise None
Cooling Convection, no fan
Warranty 5 years 1 Year 1 Year
Duty Cycle 24 hours a day, 100% continuous

drawing of the PBCD315 showing dimensions

The following table describes the display of LED lights at different stages of charging:
Q: Can I leave the battery continuously on the charger?
A: Yes, the charger will go into "maintenance mode" and keep the battery topped off.
Q: Can I draw power from the battery when the charger is connected?
A: Probably. . . There is some pulsing going on with the charger which your equipment might not be happy with (it is a pulse-charger, 1 second pulses with 20mS gaps), but if you combine this with the battery the battery will fill in the gaps, so the ripple is no more than it would see in an automotive application.
Q: If I discharge the battery while the charger is attached will the charger maintain a full charge?
A: Yes, When the charger detects that the battery voltage has dropped it knows that the battery needs to be charged and goes into "bulk charge" mode again automatically.
Q: Can the charger be left connected to the battery when the charger is not turned on, or when the input voltage of the charger has been cut off?
A: Yes.


OEM Battery Chargers Charging lighting system batteries, and scooters in a train, locomotive, boat, or electric vehicle.

OEM Battery Chargers Fully automatic without intervention.

OEM Battery Chargers Output short circuit and battery polarity protections. Input low voltage and high voltage connections.

OEM Battery Chargers Charging 12 volt "jump start" batteries from a 12 volt locomotive or float.

OEM Battery Chargers Charging 12 volt electric bicycle from a train.

Universal Power Input OEM Power Supplies and OEM Battery Chargers Three stage charge--constant current, constant voltage, and float. It is suitable for any size 12 volt lead acid battery.

Installation Notes:
  1. A qualified automotive electrical technician should be used to wire the charger into the vehicle.
  2. The PBCD315-72-12 converts 72 volt power into 12 volt power with 75% efficiency, so for a 20 amp output the input needs over 4.4 amps. Make sure that the wires connecting the are adequate for the current and the length of the run. If the voltage drop in the wires are too much the "Low Battery Voltage" alarm will come on. Wires that are too small may also overheat and melt the insulation, causing a dangerous situation. 12 gauge is usually adequate for runs up to 20 feet of wire (adding together the positive and negative wire lengths).
  3. It is OK to leave the unit on the charger when the power to the charger goes on and off.
  4. Mount in an area that will get adequate ventilation and will be free from rain, spray, or excessive dust.

Model PBCD315-72-12 DC input battery chargers. DC Input Voltage 65-90V Charging Voltage 12V Nominal, 14.4 volt maximum. Maximum Charging Current 20A Charging method: multistage charge. Protections include (1) Input and output polarity protect (2) Output short circuit protect (3) Over temperature protect

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