DCDC Chargers

If you’re using an auxiliary battery in your outdoor power setup, you’ll almost certainly need a DCDC charger. A DCDC charger serves the purpose of efficiently managing and regulating the flow of electrical power between two Direct Current (or DC) power sources. Usually this involves taking charge from your vehicle’s alternator or your solar panels, and using it to charge your auxiliary battery. A DCDC charger will ensure your auxiliary battery receives a stable and appropriate charging voltage, preventing damage caused by overcharging or undercharging. This is crucial for maintaining the health and longevity of your auxiliary battery.

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DCDC Chargers FAQ

What does a DCDC charger do?

A DCDC charger regulates and optimises the power drawn from your vehicle’s alternator, ensuring that your auxiliary battery is charged correctly and efficiently. It provides a stable output, compensating for voltage drops, and can also integrate solar power through an inbuilt MPPT controller, making it essential for off-grid adventures.

Do I need a DCDC charger for lithium battery?

Yes, a DCDC charger is highly recommended for lithium batteries as it provides the precise charging profiles needed to maximise battery life and performance. Unlike traditional lead-acid batteries, lithium batteries require a consistent and controlled charge, which a DCDC charger delivers.

Does a DCDC charger isolate main battery?

Yes, most DCDC chargers are designed to isolate your main starting battery from your auxiliary battery, preventing the auxiliary battery from draining the starting battery. This ensures that your vehicle can always start, even if the auxiliary battery is depleted.

Do I need a DCDC charger for solar?

Yes, if you plan to use solar panels to charge your auxiliary battery, a DCDC charger with an inbuilt MPPT solar charge controller is crucial. It optimises the energy harvested from solar panels, ensuring your batteries are charged efficiently even in varying sunlight conditions.

What size DCDC charger do I need?

The size of the DCDC charger you need depends on your power requirements. For light to medium applications, a 25A DC-DC charger may suffice. For more demanding setups, particularly those with larger battery banks or higher power consumption, a 40A DC-DC charger is recommended. Consider your battery type, the total capacity, and your energy usage when selecting a charger.