Applicable Models: BB1230, BB122440 

The battery to battery charger made by Sterling Power solves a huge issue that many of us have: charging your battery bank off of your cars alternator. Sterling accomplished this by creating a charger that takes power from the starter battery, regulates the voltage and current, then sends it to the battery bank.

Here is a step by step guide on setting this unit up with Battle Born Batteries!

Before starting this installation, make sure that your vehicle is powered off.

Step 1:

Take unit out of box and remove lower front red face plate to expose the input terminals.

Step 2:

Connect the negative terminal of the house batteries to the negative terminal of the starter battery with a 6 or 8 AWG cable. We used a 6 AWG cable throughout our installation.

Step 3:

Run a positive cable from the positive terminal of the starter battery to the “IN+” terminal of the battery charger.

Run a negative cable from the negative terminal of the starting battery to the “NEG-” terminal of the battery charger.

Step 4:

Bring a cable from the positive terminal of your house battery and connect it to the “OUT +” of the battery charger.

Double check that you have made all of the correct connections and then start the vehicle and the unit will power on.

Step 5:

Once the charger is fully powered on press both of the buttons, “SETUP” and “SELECT”, for 10-12 seconds (10-12 flashes). Then use the left or right button to move the LED up to the “Custom” position. Press and hold the two buttons again for 2 seconds to select this setting.

Step 6:

A LED at the top of the unit will be blinking over “Bulk/Boost.” Use the two buttons to move the LEDs so that both the 14.2 V and 14.6 V are illuminated. Press and hold the two buttons again for 2 seconds to select this setting.

Step 7:

The “Conditioning” LED will now be flashing. As before, use the two buttons to move the LEDs so that they are illuminating 13.4 V and 13.8 V. Press and hold the two buttons again for 2 seconds to select this setting.

Step 8:

The “Float” LED will now be flashing. Use the two buttons to move the LEDs so that they are illuminating 13.4 V and 13.8 V. Press and hold the two buttons again for 2 seconds to select this setting.

Step 9:

Two LEDs at the top of the unit should now be flashing, the “Bulk/Boost” and “Float” LEDs. Press the two buttons for two seconds. Now the “Conditioning” and “Float” LED will illuminate. Press and hold the two buttons for two seconds. Press and hold the two buttons for two seconds for the third and final time.

Now you can either press the two buttons again or let the unit sit for 30 seconds to restart it. It will then power off and restart with the correct charging parameters.

Step 10:

If your vehicle does not have regenerative breaking, you can turn it off by pressing the “SETUP” button for 10-12 seconds. You will then see the “Absorption” light blinking. Press the two buttons for two seconds and then wait 30 seconds for the unit to restart.

Step 11:

With the vehicle on, use a multi-meter to make sure that the charger is outputting the correct voltages. If it is not, you can reset the unit by following this video.

If you have any issues, please give us a call at (855) 292-2831 or email us at [email protected] and we will be happy to help with the process.

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