How do I use a DC to DC controller to charge my trailer’s lithium battery?

Please take a moment to watch the video below for step-by-step guidance, or follow the step-by-step written directions.

If you need additional help, our After Sales team at Escape Trailer will be happy to assist you. You can submit a support ticket using this form. 

1. Understand what the device does

• The DC to DC controller boosts your vehicle’s alternator voltage.

• This allows it to properly charge a lithium trailer battery to about 14.2–14.4 volts (full charge level for lithium batteries).

• Without it, most vehicle alternators only output voltage suited for lead-acid batteries, which may not fully charge lithium batteries.

2. Connect the trailer to your vehicle

• Plug the 7-pin connector from your trailer into your tow vehicle.

• This connection is what powers and activates the DC to DC controller.

• Once plugged in, the device becomes “live” and begins operating automatically.

3. Start driving to charge the battery

• When your vehicle is running and the 7-pin is connected:

  • The controller automatically boosts voltage from the alternator.

  • Your trailer’s lithium battery begins charging efficiently while you drive.

• No manual switching is required for charging operation.

4. (Optional) Connect to the app

• If you want to check settings or monitor the system:

  • Make sure the 7-pin connector is plugged in and the device is powered on.

  • Then connect using the Viron Connect app.

• The app will not work if the device is not powered through the 7-pin connection.

5. Find important device information

• Look at the white sticker on the unit for:

  • Part number

  • Serial number

  • Bluetooth PIN (for app connection)

  • PUK code (used to reset Bluetooth if needed)

6. Reset Bluetooth (if needed)

• Use the PUK code on the sticker if you need to reset Bluetooth pairing.

• Follow the app or manufacturer instructions after entering the code.