DC-DC Chargers

Keep your auxiliary battery charged while the kilometres roll by with Durst DC-DC chargers for 4WDs, caravans, campers and service vehicles. Compare 25A and 60A 12V chargers with vehicle and solar inputs, or a 50A dual-voltage model for 12V and 24V systems. The collection also includes 15A and 40A MPPT solar controllers. Match the charger to your source vehicle, battery bank and installation requirements before choosing.

Choosing the Right DC-DC Charger

A DC-DC charger manages power from the vehicle electrical system and supplies the charging profile required by an auxiliary battery. Choosing the right model starts with understanding both sides of the system—not simply picking the highest current rating.

Confirm Your System Voltages

Check the source-vehicle voltage and auxiliary-battery voltage separately. The Durst AP25DC and AP60DC charge 12V auxiliary batteries, while the DC/DC 50.12/24 supports 12V and 24V battery systems with automatic voltage detection.

Do not assume that a charger’s input-voltage range is also its supported auxiliary-battery voltage. Confirm both values on the individual product page and manual.

Match the Charging Current to the Battery

The collection includes 25A, 50A and 60A DC-DC charging options. The AP60DC also provides selectable 30A slow and 60A fast modes.

Consider:


  • The battery manufacturer’s recommended charging rate

  • Auxiliary-battery capacity and chemistry

  • Available alternator output

  • Expected driving and recharge time

  • Cable length, cable size and voltage drop

A larger charger is not automatically the correct choice. The battery, alternator and installation must all support the selected charging current.

Check Battery Chemistry and Solar Capability

The AP25DC and AP60DC support lead-acid, AGM, calcium and LiFePO4 batteries. The dual-voltage model supports lead-acid, GEL, AGM and LiFePO4 batteries. Compatibility remains model-specific, so match the exact charging profile to the battery manufacturer’s requirements.

The DC-DC chargers provide vehicle and solar charging capability, while the collection’s 15A and 40A MPPT controllers are standalone solar regulators. These solar controllers should not be treated as alternator-to-auxiliary-battery chargers.

Plan the Complete Installation

Cable size, fusing, grounding, mounting position, ventilation and solar-input limits affect both performance and safety. Follow the exact Durst manual for the selected model and use suitably rated components throughout the system.

Compare the individual specifications or contact Durst if you need help matching a charger to your vehicle, battery and intended use.

Frequently Asked Questions

DC-DC Charger Questions, Answered

What Does a DC-DC Charger Do?

A DC-DC charger uses power from your vehicle’s electrical system to charge an auxiliary battery while driving, making it useful for 4WDs, caravans, campers and service vehicles.
What Size DC-DC Charger Do I Need?

Match the charger current to your battery’s capacity, chemistry and recommended charge rate. Also consider alternator capacity, cabling and desired recharge time—a higher current is not automatically better.
Can Durst DC-DC Chargers Charge Lithium Batteries?

Yes. The current Durst DC-DC chargers list LiFePO4 compatibility. Confirm the battery’s required charging profile and maximum charge current before choosing a model.
Can They Charge From an Alternator and Solar?

Yes. The AP25DC and AP60DC accept vehicle and solar inputs, while the DC/DC 50.12/24 includes an MPPT solar regulator. All three models also list smart-alternator compatibility.
Do I Need a 12V or 24V Charger?

Match the charger to your auxiliary-battery voltage. The AP25DC and AP60DC charge 12V batteries, while the DC/DC 50.12/24 supports both 12V and 24V systems.
What Do I Need to Install a DC-DC Charger?

You’ll need correctly sized cables, suitable fuses and a secure mounting location. Follow the product manual or use a qualified installer.

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