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

SKU: RNG-DCC1212-40-EU
€135,99 €169,99
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+ 1350   Renogy Rays after purchase.
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  • 【Compatible with Multiple Battery Types】 The Renogy DC-DC battery charger is compatible with a variety of alternator types, ensuring proper charging for AGM, Flooded, Gel, and Lithium batteries.
  • 【Smart 3-Stage Charging】 This DC-DC charger utilizes a 3-stage charging process (Bulk, Boost, and Float) to efficiently charge your house batteries from the starter battery. The process ensures optimal performance and automatic charging to 100%.
  • 【Comprehensive Protections for Ultimate Safety】 Equipped with advanced safety features, including over-voltage, over-temperature, and reverse polarity protection, this charger guarantees safe operation. Additionally, it isolates the input and output to prevent voltage transmission errors and interference during house battery charging.
  • 【Protect Your Starter Battery】 The DC-DC charger detects when the generator is running, preventing over-discharge of the starter battery and safeguarding the generator. This ensures the reliable operation of your vehicle's electrical system.
  • 【Reliable and Durable Design】 With its compact and robust construction, the DC-DC charger is designed to withstand harsh environments. It is CE-certified for quality assurance and delivers dependable performance in various off-grid applications.
Temperature Sensor
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Delivery time: 4-9 business days. (Excludes LTL shipping.) Shipping by weight
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The diagram below illustrates the complete connection setup for the DC-DC On-Board Battery Charger.

The DCC12 Series battery chargers are one of the most effective ways to charge auxiliary or house batteries from the alternator or starter battery. Compatible with various alternator types, the DCC12 delivers precise charging for AGM, Flooded, Gel, and Lithium deep cycle batteries. Featuring a 3-stage battery charger and multiple electronic protections, it ensures batteries are charged optimally and automatically. To enhance safety, the DCC12 isolates the input from the output, preventing incorrect voltage transmission. The compact and sturdy DCC12 can be installed on RVs, commercial vehicles, boats, yachts, and other applications.

If you have any questions regarding this product, please submit a case.

Protect Your Starter Battery

Compatible with both traditional and smart alternators, the D+ Ignition cable detects when the generator has started, preventing over-discharge of the starter battery and protecting the generator. It is recommended to use 18-16 AWG copper cable.

Compatible with Multiple Battery Types

The DC-DC battery charger delivers optimal charging for AGM, Flooded, Gel, and Lithium batteries.

Smart 3-Stage Charging

The DC-DC battery charger charges house batteries from the starter battery using a 3-stage charging process (Bulk, Boost, and Float), providing optimal and automatic charging up to 100% capacity.

Prolong Battery Lifespan

Prolong Battery Lifespan The charger selects the appropriate charging mode based on battery voltage. With the addition of a DC-DC temperature sensor, the charger protects batteries from extreme temperatures through a -3mV/°C/2V compensation, allowing the charger to recognize voltage more accurately and maintain stable, consistent charging. Note: The temperature sensor is not included and cannot be used with Lithium batteries.

Various Protections for Safety

The DC-DC battery charger isolates the input and output to prevent voltage transmission errors and interference during house battery charging. It features advanced safety technologies, including over-voltage protection, over-temperature protection, and reverse polarity protection, to ensure safer operation.

Protect Your House Battery

The LC wire automatically adjusts the charging current to prevent excessive current, protecting the house battery from potential damage. It is recommended to use 18-16 AWG copper cable for optimal performance.

Package Includes

Renogy 40A DC to DC Battery Charger

x 1
Nominal Voltage
12V
Rated Charge Current
40A
Output
750W
Idle Power Consumption
<0.4A
Input Voltage Range
8V-16V
Equalization Voltage
N/A
Float Voltage
13.2-13.8v
Boost Voltage
14.1-14.7v
Operating Temperature
-20°C to +50°C
Dimensions
12.24 x 6.89 x 2.68 inches / 31.1 x 17.5 x 6.8 cm
Weight
5.29lbs / 2.4kg
Certifications
CE, ROHS
Warranty Period
2-year material and workmanship warranty

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Manual Book

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Frequently Asked Questions

1. What is a DC-DC charger? What is its purpose?

The DC-DC battery charger is installed between the starter battery and the house battery. For the RV system, The generator ensures stable power supply to the starter battery, and uses the extra power of the starter battery to supply power to the house battery.

2. How to choose a suitable battery charger?

1. Make sure that the entire system is a 12V system 2. Ensure that the maximum charging current provided by the DC-DC battery charger does not exceed the maximum charging current allowed by the house battery

3. How to set the charging voltage value of the charger?

The DC-DC battery charger adopts the design of the DIP switch and it provides 6 charging voltage settings through five gears. These six charging voltages meet the requirements of lithium batteries and lead-acid batteries in order to provide more charging options. SW5 switch is the selection switch for switching between lead-acid batteries and lithium batteries.

4. What is the D+ Ignition cable? Is it necessary to connect?

The D+ Ignition cable is a design method used to identify whether the generator is started. This design method can well prevent the starting battery from being over-discharged during the charging process. When the generator is started, a signal will be obtained on the D+ Ignition cable, which will light up the indicator light of the charger. The DC-DC will not power on or operate until the D+ ignition cable is connected.

5. How can I get these cables?

The battery temperature sensor for DC-to-DC car battery chargers can be purchased at the Renogy store. The D+ ignition cable can be purchased at the local store or online, it suits both D+ and LC terminals. 18-16AWG copper cable recommended.

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