Renogy 12V 40A DC to DC Battery Charger with MPPT
This sleek, versatile charger keeps you powered wherever you go. It switches seamlessly from DC input while driving to solar charging when parked. With a simple press of the SELECT button, you can easily set solar priority mode for maximum efficiency.
Effortlessly switch between solar and DC inputs to keep your battery charged efficiently, all while enjoying the reliability and superior performance you expect.
Seamlessly Mode Switch
The system automatically switches to the alternate charging mode when the input voltage in the primary mode drops below the default threshold, ensuring continuous, efficient charging.
DC Priority
Solar Priority
RV
SUV
Boat
Stay Charged on the Move
Stay Charged on the Drive
Stay Charged on the Water
Multiple Safety Certifications
Achieving peak standards for reliable off-grid power
Wiring Diagram
Effortless installation with pre-installed wires and clear labels
Get the Proper Specs for Your System
For longer cable runs, use a larger gauge to minimize voltage drop, reduce power loss, and safeguard your batteries, ensuring efficient and reliable power transfer.
Recommended Accessories
Complete your setup with all the essential accessories from Renogy for a seamless, one-stop shopping experience.
This cable ensures a reliable and efficient connection between your solar panels and charger.
This cable maximizes efficiency, easily delivering power from your charger to your battery.
Safeguarding your system from overloads and maintaining peak performance.
Package Includes
Battery Charger
x 1
Heat-shrink tubings
x 7
Mounting Screws
x 4
Frequently Asked Questions
What type of alternator is this DC to DC on board battery charger compatible with?
This battery charger is designed to work with both conventional and smart alternators. However, because conventional alternators maintain a consistent voltage during charging, while smart alternators adjust their charging output based on operating conditions, it is necessary to connect the charger to the smart alternator using the IGN cable (ACC labeled) from the product through the Vehicle Ignition Port.
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?
Solar and DC charging will automatically switch based on the following conditions: 1) When the generator is running, the system will switch from DC to solar charging if DC input voltage is <11.3V and solar input voltage is >13V. 2) When the generator is off, it will switch to solar charging if DC input voltage is <12.7V and solar input voltage is >13V.
