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

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

SKU: RNG-DCC1212-40-EU
5 (36)
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€169.99
€135.99
+   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.
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12V 40A DC to DC On-Board Battery Charger
12V 40A DC to DC On-Board Battery Charger
€169.99
€135.99
€169.99
€135.99
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12V 40A DC to DC On-Board Battery Charger
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5 (36)
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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.

Note: Our product department has identified errors in the paper manual included with battery chargers sold before March. The manual on our website has been updated. Refer to the updated manual to verify your product's functions and settings. If you have any questions, feel free to contact us.

Note: The DCC12 Series battery chargers are compatible exclusively with the RTSDCC-G1 sensor.

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.
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 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.
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.
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.
The diagram below illustrates the complete connection setup for the DC-DC On-Board Battery Charger.
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
1-year
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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36 Reviews Hide Reviews Show Reviews

  • 5
    Trustworthy

    Posted by Edith L Greer on Sep 22nd 2023

    House LifePO4 battery charged up like a champ from the car, never had a worry after 2 months of car-camping. Quality workmanship and design.

  • 4
    Check the fan direction

    Posted by Thomas on Sep 16th 2023

    I followed the instructions and mounted and wired it up to find out it over heated and shut off.? At least the high temperature cutoff works.? Come to find out the fans on the input side blow outwards, so its backwards for airflow.? Otherwise seems to charge at around 39 amps with 25 feet of 2 awg wire going to the lithium batteries.? Oh also, i think there is some voltage leakage from starter to house batteries, i am buying a circuit breaker so i can disconnect it when not driving.

  • 5
    Good value compared to other brands.

    Posted by Andrew L.. on Sep 6th 2023

    40 amp but set up for 20 amp with 40 available if I change to lithium batteries in the future.? best to set up dip swithches and control wires befor mounting since the makings are small to see once mounted.

  • 5
    DC to Dc charger

    Posted by Terry Willman on Aug 27th 2023

    Works as advertized be sure to know the details of your needs? exactly the size your layout calls for

  • 5
    Worked great, keeps my lithium batteries charged

    Posted by rl123 on Aug 20th 2023

    Small, charged and maintained my lithium batteries, did not have to use the generator

  • 5
    RV Upgrade

    Posted by Joe Noel on Aug 13th 2023

    We change our Class C RV from 120 VAC 30 amps to 220 VAC 50 amp. Replaced all the wiring and Electronics, batteries, and installed fuses and circuit breakers

  • 5
    Perfect to charge 2nd house battery for 12V car fridge

    Posted by Joe Noel on Aug 8th 2023

    This is exactly what I wanted and worked exactly the way I wanted it to. I got a 12 V DC car fridge for our 4,000 mile, 2 week road trip. I installed a 2nd ¡°house¡± battery in my vehicle and used this to charge the 2nd house battery while we were driving. The house battery ran the fridge during the night while we were stopped, and got charged during the day while we were driving. I never drained my primary battery for starting my vehicle. This product perfectly charged my battery at the optimal voltage and current limit to prevent overheating the battery and prevent overloading the alternator on my vehicle. Since both batteries and the charger were in the engine compartment, I installed a switch so I could turn off the charger in slow traffic when there wasn¡¯t good airflow, then turned it back on at highway speeds. This product was exactly what I wanted. Hopefully it lasts a long time, I really like it. Instructions were good. I basically installed it just like the instructions and diag

  • 5
    Good DC to DC supply

    Posted by Colm Lynam on Jul 30th 2023

    This seemed to work well, however I could never tell how much it was charging. Would be really nice to be able to connect up to it and see what it's actually doing when it's doing it.

  • 5
    Muy buenos

    Posted by Jos¨¦ Martinez on Jul 27th 2023

    F¨¢cil de instalar

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