Can Ark DC-DC Battery Charger Charge Lithium Batteries From Truck Alternator
Updated 09/30/2026 | Published 09/27/2026
Question:
I'm building out a new off-grid travel trailer with lithium batteries and want them to charge while I'm driving. Will the ARK46FR work with my lithium batteries?
asked by: Jason M
Expert Reply:
Hey Jason! Yes, the Ark DC-DC Battery Charger # ARK46FR is compatible with lithium batteries and has a 50 amp DC-to-DC charging output. This is a great way to charge your trailer's battery bank from the tow vehicle while you're driving instead of relying on the limited charging you typically get through the 7-way.
This is also a great setup for off-grid camping since it has a built-in MPPT solar controller along with a smart shunt for monitoring your battery bank. It also uses vehicle-sense technology, so you don't have to run a separate ignition or D+ trigger wire to tell the charger when the vehicle is running.
Where are you headed once you finish the build?
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Product Page this Question was Asked From
Ark DMC50 DC-DC Battery Charger with Integrated MPPT Solar Controller - 12V - 50 Amp
- Battery Charger
- Battery Charger
- Car/Truck/SUV
- RV/Camper
- Boat
- 12V
- Charges and Maintains
- AGM
- Calcium
- Gel
- Lead Acid
- Lithium
- Solar Panels to Auxiliary Battery
- Vehicle Battery to Auxiliary Battery
- Smart Charge
- Ark
more information >
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Jason
9/30/2026
Thanks, that sounds like exactly what I'm looking for. I'm planning on running a 400AH battery bank plus solar, so having the alternator charging, the solar controller, and monitoring all together should really simplify the setup.