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12V 20A DC to DC On-Board Battery Charger

SKU: RNG-DCC1212-20-US
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12V 20A DC to DC On-Board Battery Charger
$109.99
$159.99
$109.99
$159.99
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-Compatible with AGM, Flooded, Gel, and Lithium batteries.
-Use 3-stage charging-Bulk, Boost, and Float to ensure charge to 100%.
-Various Protections For Ultra Safety.
-Protect Your Starter Battery.
-Certified with CE. Robust design makes it suitable for all conditions
 

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.

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, please call us at 1 (909) 287-7111 or or submit a ticket for troubleshooting assistance.
  • More questions about your off-grid power system? Learn more from Renogy Learning Center!
RV
MARINE
CAMPING
OUTDOOR
CABIN
TRUCK

 

 

Package Includes

Renogy 20A DC to DC Battery Charger

Renogy 20A DC to DC Battery Charger

1 x

 

 
Renogy 20A DC to DC Battery Charger 
System Voltage: 12VDC Equalization Voltage: N/A
Rated Charge Current: 20A Float Voltage: 13.2-13.8v
Rated Max Power: 250W Boost Voltage: 14.1-14.7v
Idle Power Consumption: <0.4A Operating Temperature: -20°C to +50°C
Input Voltage Range: 8V-16V Dimensions: 8.3 x 6.9 x 2.7 in / 211 x 175 x 68 mm
Weight: 3 lbs. / 1.3 kg  Certification: CE ROHS


Warranty Information

Accessories 1-year material warranty
 

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!

 
 
Renogy DC-DC Battery Charger Manual
 

44 Reviews Hide Reviews Show Reviews

  • 5
    Quick shipping and as described

    Posted by towersales on Aug 14th 2023

    Quick shipping and as described. Great seller. Thanks!

  • 5
    Looks good about to hook it up

    Posted by jostun19 on Jul 17th 2023

    Looks good about to hook it up

  • 5
    Box was partially crushed in shipping but item shows no damage

    Posted by brandonlee012 on May 24th 2023

    Box was partially crushed in shipping but item shows no damage. Item arrived quickly.

  • 5
    Arrived on time and as described/

    Posted by jnau8777 on Mar 20th 2023

    Arrived on time and as described/

  • 5
    Nice addition for charging on the road

    Posted by Wayne57 on Mar 4th 2023

    I mounted this in the front tub of our teardrop trailer to charge my 100aH lifepo4 battery while going down the road. Nice instructions and it works great. I like the ability to charge at either 10 or 20 amps. I have the D+ cable wired into the running lights of the trailer so I can turn the charger on/off by just turning the running lights on/off.

  • 5
    Fast shipment

    Posted by rivermtnman on Feb 21st 2023

    Fast shipment, Great Seller!!!

  • 5
    Works as expected

    Posted by bailey3d on Nov 10th 2022

    Works as expected. No issues so far. Easy install!

  • 4
    Does what it should. Double check settings.

    Posted by JJ on Aug 8th 2022

    Does exactly what you expect it to. The fan runs quite a bit at full current and often even at half current. Double check what position is going on vs. off for dipswitches and triple check which numbers you have in which positions. I got it wrong the first time even though I was warned in advance.

  • 5
    Love this

    Posted by Brian Athey on Jul 23rd 2022

    This is a life saver on those cloudy rainy days. Doesn't take long to rechargy battery bank