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April 21, 2023

DC Source Chargers for charging 12 volt lead acid batteries from a 24 volt (20-30 volt) power source

DC Source Battery Charger for wheelchairs, scooters, bicycles, and wheel chairs

Inexpensive multistage microcontroller based lead acid battery charger voltage charger with 20 VDC to 30 VDC input. Charge 12 volt lead acid batteries. Charge any lead acid battery from a large one, or from a Humvee, truck, fork lift, truck, tractor or back-hoe.

24V to 12V DC/DC battery charger, heavy duty industrial and military
Heavy Duty, Industrial, Marine, and Military DC input battery chargers click here.

For 12V to 12V, 12V to 24V, 24V to 24V DC chargers click here

Model Number PST-BC2412-15
DCDC Charger
24V to 12V charger
DC Source Battery Charger for wheelchairs, scooters, bicycles, and wheel chairs
XLR Charger Cable
charger cable with a standard wheelchair connector
DC/DC Converter Regulator
Model Number PST-BC2412-15
DCDC Charger
Input Voltage Range 24 Volt nominal, range 20 VDC to 30 VDC
Battery Voltage (nominal) 12 Volts
Continuous Charging Current 7.5 Amps
Charge Current Options The peak charge current can be adjusted to 1-7.5
Charging Algorithm 4 stage, 3 level adaptive microprocessor controlled
State diagram showing the charge algorithm
Battery Size 0.5 AH to 100+ AH
Protections Low input voltage protection
High input voltage protection
Over temperature protection
Output short circuit protection
Battery polarity protection
Dimensions 200 x 164 x 67 mm
7.9 x 6.7 x 2.8 inches
Click Here for a Dimensioned Drawing.
Connection Input: screw terminals
Output: binding posts
Isolation Non-isolated, the negatives are common on the input and output
Cooling Controlled DC Fan
Operating Temperature 0-55°C
Weight 1.5 kg, 3.3 pounds
The following table describes the display of LED lights at different stages of charging:
Status Completion Red LED 1 Red LED 2 Yellow LED Green LED
Standby   LEDs cycle while waiting
Trickle before bulk charge 0-10% The two red LEDs cycle Off Off
Bulk charge 10-90% Off Red 2 and yellow cycle Off
Fill charge (also known as "over charge") 90-99%     Yellow and green cycle
Float charge 100%       Green flash
Low battery voltage alarm   Flash Off Off Off
High battery voltage alarm   Off Flash Off Off
Low input voltage alarm   Flash Off On Off
High input voltage alarm   Off Flash On Off
Over temperature alarm   Off Off Flash Off

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.
Q: Can the charger be adjusted to lower currents?
A: Yes. There are two trimpots that we can adjust here or click here to view the instructions


OEM Battery Chargers Inexpensive DC input charger.

OEM Battery Chargers Protects even small 12 volt batteries from gassing or damage.

OEM Power Supplies Charge time is typically 58% charge in 1 hour, 82% in 2 hours, 93% in 3 hours, 98% in 4 hours.

Universal Power Input OEM Power Supplies and OEM Battery Chargers Charge efficiency is 95% for the a SLA, VRLA, or Gel Cell battery and 85% for the charger, making a combined efficiency of 81%. So a 24 volt 100 AH battery would be able to charge a 12 volt 10 AH battery 16 or 18 times before the host battery needed recharge.


OEM Battery Chargers Auxiliary batteries, hobby batteries, bicycles, and scooters in a car, van or bus.

OEM Battery Chargers Microprocessor controlled 4 stage adaptive charging algorithm suitable for Gel, Absorbed Glass Mat, VRLA, or flooded lead acid batteries.

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 sealed lead acid batteries from a vehicle.

OEM Battery Chargers Charging 12 volt "jump start" batteries from a 24 volt tow truck or service vehicle.

OEM Battery Chargers Charging 12 volt electric bicycle from a 24 volt vehicle.

Universal Power Input OEM Power Supplies and OEM Battery Chargers Four stage charge--constant current, constant voltage, fill, and float. This charges your battery the fastest way possible without damaging the battery. 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 BC-2412-15 converts 24 volt power into 12 volt power, so for a 7.5 amp output the input needs over 4 amps. Make sure that the wires connecting the BC-2412-15 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. PowerStream has available the connector that fits into many wheelchair ( we have the 3 pin XLR style in stock ). Consult the manufacturer or a wheel chair technician to obtain the proper cable and plug. (If you know about such things please educate us!)
  4. Try to connect or disconnect the battery when the charger power is "on." It is possible but extremely rare for the charger to go into a temporary fault mode if the battery is connected first, but cycling the power switch will clear this "false fault."
  5. It is OK to leave the unit on the charger when the power to the charger goes on and off.
  6. Mount the BC-2412-15 in an area that will get adequate ventilation and will be free from rain, spray, or excessive dust.

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