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

SKU: RNG-DCC1212-40-EU
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€227.99
€179.99
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RNG-DCC1212-40
12V 40A DC to DC On-Board Battery Charger
€227.99
€179.99
€227.99
€179.99
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DESCRIPTION
【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】 Offers Over-voltage Protection, Over-temperature Protection, and Reverse Polarity Protection to ensure the operation safety. It also isolates the input and output to prevent voltage transmission errors and interfere with house battery charging.
【Protect Your Starter Battery】 The DC-DC battery charger is capable of identifying whether the generator is started, to prevent over-discharge of the starting battery and protect the generator.
【Reliable Quality】 The compact and robust design makes it suitable for all conditions. CE certification.
 

The DCC12 Series battery chargers are the most effective way to charge your auxiliary or house batteries from the alternator/starter battery. Compatible with a multitude of alternator types, the DCC12 offers correct charging for AGM, Flooded, Gel, and even Lithium deep cycle batteries! Featuring a 3-stage battery charger and multiple electronic protections, owners can feel confident that their batteries are being charged optimally and automatically. For added safety to personnel, the DCC12 isolates the input from the output preventing incorrect voltage transmission. Easily install the compact yet sturdy DC1212 on RV’s, commercial vehicles, boats, yachts and many more applications!

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

Note: Our product department found that there are some errors in the paper manual attached to the battery charger sold before March , and now the manual on the website has been updated. Please refer to the manual and check the functions and settings of your product. If you have any questions, please contact us in time.

Note: The DCC12 series battery chargers are incompatible with RTSDCC-G1 battery temperature sensor, only compatible with the sensor RTSDCC-G1.

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.

Please note the LC cable is not included.

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.

This diagram shows the whole connection of the DC-DC On-Board Battery Charger.

NOTE
  • If you have any questions regarding this product, pleaseemail us at supporteu@renogy.com for troubleshooting assistance.
 

Package Include

 

Renogy 40A DC to DC Battery Charger

03-1.jpg

1 x

Renogy 20A DC to DC Battery Charger

 
Renogy 40A DC to DC Battery Charger  
Nominal Voltage: 12V Rated Charge Current: 40A
Output: 500W 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: 10.28 x 6.89 x 2.68 inches
Weight: 4.14lbs/1.88kg  
 

Warranty Information

Accessories 1-year material warranty
 

Certification

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.
More questions about your off-grid power system? Learn more from Renogy Learning Center!
 
 
12V DC to DC On-Board Battery Charger manual
12V DC to DC On-Board Battery Charger manual
Please refer to the manual below if you bought the battery charger before 03/25/2020:
12V DC to DC On-board Battery Charger Manual V1.2
 
 

31 Reviews Hide Reviews Show Reviews

  • 5
    Excellent

    Posted by N W on Dec 14th 2023

    Very Happy

  • 5
    Renogy? 40 amp DC to DC charger

    Posted by txlady on Dec 2nd 2023

    Got this to put in the back of our Jeep Wrangler JL to charge our 100ah Lithium battery. Works excellent. The 100ah lithium battery was at 51% charge turned the Renogy on, it came up to 39.8 amps and about 1 hr of driving to town and back to get gas and it had our battery totally charged back up. Nice DC to DC charger I Highly recommend this charger.

  • 5
    Flawless for 1 year

    Posted by R Braun on Nov 11th 2023

    I've had this for one year and it's been flawless. After the initial unpacking I connected to my variable dc power supply. I varied the input voltage from 10.5 to 16 and the output of the Renogy remained at 14.6 vdc. Exactly what is required to charge my batteries. Impressed. It has been working perfect now for over 25,000 miles / first year vanlife. And you can see in my photo that it is installed upside down in terms of cooling fan air flow. This was to minimize cable length.

  • 5
    Works great

    Posted by Jerry82 on Oct 7th 2023

    I bought this for my campervan and it works great.? It was fairly easy to set up.? It is fairly quiet.? The only thing is, I wish it had a switch.

  • 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