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.
12V 40A DC-DC Battery Charger with MPPT
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.
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.
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
Connecting Solar Panels To Charge Controller
This cable ensures a reliable and efficient connection between your solar panels and charger.
Battery to Charge Controller Tray Cables
This cable maximizes efficiency, easily delivering power from your charger to your battery.
ANL Fuse Set w/ Fuse
Safeguarding your system from overloads and maintaining peak performance.
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
Package Includes
Battery Charger
x 1
Heat-shrink tubings
x 7
Mounting Screws
x 4
RENOGY 40A DC-DC Battery Charger with MPPT
Charging Data
System Voltage
12V-12V
Solar Input Voltage
10-30 VDC
Output Voltage
10-16 VDC
Alternator Input
Traditional Alternator: 13.2-16.0VDC
Smart Alternator (Euro 6): 12-16.0VDC
Smart Alternator (Euro 6): 12-16.0VDC
Maximum Output Current Rating
40A
Output Power
616W
Battery Types
AGM, Gel, Flooded, Lithium-iron Phosphate
Input Fuse Rating
60A
Output Fuse Rating
50A
Charging Efficiency
≥93%
Idle Power Consumption
＜10 mA
GENERAL DATA
Model
RBC40D1S
Terminal Size
/
Grounding
Common Negative
Communication
/
Operating Temperature
-4℉ -113℉ /-20 ℃ - 45℃
Storage Temperature
-4℉ -140℉ /-20 ℃ - 60℃
Humidity
0%~95% RH
Cooling
Heat Sink
Enclosure Rating
IP31
Dimensions (LxWxH)
195 x 149 x 48 mm / 7.68 x 5.87 x 1.89 inch
Weight
1.2 kg /2.65 lb
Regulatory and Safety Specifications
FCC Path 15, Class B,CE,RoHS，SAA
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.
