Renogy 12V 40A DC to DC Battery Charger with MPPT
This compact, versatile charger keeps you powered on the go. It defaults to DC input while driving and automatically switches to solar charging when parked. Easily set solar priority mode with the SELECT button.
Seamlessly Switch Between Solar and DC Inputs for Efficient, Reliable Battery Charging
Seamlessly Mode Switch
It will automatically switch to the alternate charging mode when the input voltage in the primary mode falls below the default voltage.
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
Get the Proper Specs for Your System
Longer cables need a larger gauge to reduce voltage drop and power loss. Increased resistance from longer cables can cause inefficiency and potential damage. A larger gauge wire ensures efficient power transfer and protects your batteries.
Recommended Accessories
Get all necessary accessories for your kit from Renogy for a 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.
