Sterling Power DC Battery to Battery Charger 24v input to 12V output at 70 amps. DC to DC converter.

Product SKU: BB241235
  • $521.32
    Unit price per 
Shipping calculated at checkout.

DC to DC converter. Charge your auxiliary battery bank with the correct multistage, temperature compensated charging curve by using the input power of any vehicles alternator thru the start battery system automatically while the vehicle is running.

24v input at up to 35 amps and output is 12v at up to 35amps.

Simply connect in between a starting battery and house bank and any time the vehicle's alternator is running this smart charger will smart charge the output bank.

Preset Charge Profiles and one user customizable battery charging profile available.

Sterling's range of Battery to Battery Chargers (B2Bs) has grown significantly over the past few years. This is in an effort to supplement the ever-growing demand from the commercial vehicle, recreational vehicle and marine industries. The B2Bs have become extremely popular as they fast charge batteries as you cruise along without the need for complex wiring, touching your alternator, voiding the alternator's warranty and tampering with the electronic control units (ECUs). You can provide the onboard batteries with a fast 4 stage charging profile with a very simple and speedy installation. All of the benefits of advanced charging without any of the drawbacks. Simply connect the B2B between the battery being charged and the battery you wish to charge.


1) Multiple Activation Modes: Automatic for most non vehicle applications,

Manual for remote activation.

Regenerative braking (requiring ignition feed),

Automatic regenerative braking, requiring no ignition feed.

2) Input 24v & Output charging at 12V

3) Much larger model up to 3000W coming soon.

4) Current is NOT taken from the input battery and given to the output battery. The B2B uses alternator power to charge the output battery. Manual mode and regenerative braking mode allows you to override this.

5) Safety features:

100% fire proof plastic box.

No screws to corrode.

Thermal power reduction.

Multi stage fan cooling.

The internal heat sink temp is between 158 – 180F. The unit shall drop to half power by this point – additionally reducing temperature.

6) Night Time Setting: Allows the unit to ran at half the power so the fan noise is kept down.

7) Boost / Reduce Charging: The B2Bs ensure batteries get the correct charging profile irrespective of high or low input voltages.

8) B2B turns on at 13.3V and turns off at 13.0V (x 2 for 24V). Thus, does not drain input battery. Regenerative braking mode allows the input voltage to drop to 12.2V (x 2 for 24V).

9) Customizable Profile: Choose your own charging profile on the front panel.

10) 9 preset battery chemistry options: Including AGM, LiFePO4, Gel, Flooded and sealed lead acid.

11) 4 stage battery charging: The B2B charges batteries between 5-20 times faster than a standalone alternator.

12) Very Simple to install: No electronic Control Unit (ECU) issues. No complex wiring. No warranty issues. Fully prepared for smart alternators (regenerative braking).

Remote control optional.

Additional information:

  • brand: Sterling Power
  • charge-current-a: 70
  • dc-input-voltage: 24 V
  • dc-system-voltage: 12 V
  • height-1: 4
  • length-1: 8
  • lithium-compatible: Yes
  • width-1: 6


We use cookies to provide and improve our services. By using our site, you consent to cookies.