12V 40A DC to DC On-Board Battery Charger

Golden Harvest Solar

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Price: $199.99
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12V 40A DC to DC On-Board Battery Charger

The DC-DC Battery Chargers are the most effective way to charge your house batteries from the starter battery. Compatible with a multitude of alternator types, the DC-DC battery charger offers correct charging for AGM, Flooded, Gel, and even Lithium deep cycle batteries! Featuring a 3-stage battery charger and multiple electronic protections, users can feel confident that their batteries are being charged optimally and automatically. For additional safety, it isolates the input from the output preventing incorrect voltage transmission. Easily install the compact yet sturdy DC-DC battery charger on RV's, commercial vehicles, boats, yachts, and many more applications!

Compatible Multiple Battery Types

Compatible with a multitude of alternator types, the DC-DC battery charger offers correct charging for AGM, Flooded, Gel, and Lithium batteries.

Smart 3-stage Charging

The DC-DC battery charger will charge your house batteries from the starter battery by 3-stage charging (Bulk, Boost, and Float), to make sure it optimally and automatically charge to 100%

Various Protections For Ultra Safety

The DC-DC battery charger isolates the input and output to prevent voltage transmission errors and interfere with house battery charging. It has multifunctional safety technology including over-voltage protection, over-temperature protection, and reverse polarity protection to make it safer for use.

Protect Your Starter Battery

This Renogy DC-DC battery charger is compatible with traditional and smart alternators. The D+ Ignition cable is capable of identifying whether the generator is started, to prevent over-discharge of the starting battery and protect the generator. 18-16AWG copper cable recommended.

Please note the D+ Ignition Cable is not included.

Protect Your House Battery

The LC wire can automatically adjust the charging current to prevent excessive charging current from damaging the house battery. 18-16AWG copper cable recommended.


Prolong Battery Lifespan

The charger needs to select the charging mode according to the battery voltage. By utilizing the DC-DC temperature sensor, this charger is able to protect your battery from high or low temperature by giving -3mV/°C/2V compensation so that the charger recognizes the voltage more accurately and assures stable and constant charging to the battery.

Please note the temperature sensor is not included and it cannot use with Lithium batteries.



System Voltage: 12VDC

Rated Charge Current: 40A

Output: 500W

Idle Power Consumption: <0.4A

Input Voltage Range: 8V-16V

Weight: 4 lbs. / 1.9 kg

Equalization Voltage: N/A

Float Voltage: 13.2-13.8v

Boost Voltage: 14.1-14.7v

Operating Temperature: -20°C to +50°C

Dimensions: 10.3 x 6.9 x 2.7 in / 261 x 175 x 68 mm

Certification: CE ROHS


Accessories: 1-year material warranty


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