What type of alternator is this DC to DC on board battery charger compatible with?

Works with both alternators. But smart alternators vary voltage, so you MUST connect the charger's IGN (ACC) cable to the Vehicle Ignition Port for them to work properly.

What types of battery does the charger support?

It's suitable for 12V Lithium, Gel, AGM, and Calcium batteries. This charger enables the batteries to reach a full 100% charge. Additionally, it has the capability to revive lithium batteries that have become discharged to a low voltage.

How do l set the battery since there is no display screen?

To change the battery type, press and hold the SELECT button on the side of the battery charger. The LED lights corresponding to each battery type will illuminate in sequence, indicating the available options.

If both solar power and the engine are available, can we prioritize using solar power to charge the battery?

Our product defaults to DC charging. To prioritize solar charging, simply press the SELECT button on the side.

Can solar charging and DC charging be switched automatically?

Charging automatically switches to solar when:

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🔌 Power your adventures with smart, unstoppable energy!

BUILT FOR EXTREMES - Operates flawlessly from desert heat to marine salt spray—reliability wherever you roam.
SMART SAFETY SHIELD - Auto shutoff, reverse polarity, and temperature protection keep your batteries safe and sound.
PLUG PLAY POWER HUB - Color-coded cables and LED indicators make installation and monitoring effortless.
ALL BATTERY COMPATIBILITY - Optimized charging for LiFePO4, Gel, Flooded & SLA batteries—one charger to rule them all.
DUAL MODE CHARGING MASTERY - Seamlessly switches between solar and alternator inputs for nonstop power.

The RENOGY 12V 40A DC to DC Charger with MPPT is a versatile, rugged battery charger designed for RV, marine, and off-grid use. It intelligently switches between solar and alternator inputs, supports multiple battery chemistries with a 4-stage charging process, and offers comprehensive safety features. Built to withstand harsh environments, it ensures efficient, reliable charging wherever your journey takes you.

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