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

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

SKU: RNG-DCC1212-20-UK
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12V 20A DC to DC On-Board Battery Charger
12V 20A DC to DC On-Board Battery Charger
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12V 20A DC to DC On-Board Battery Charger

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-Compatible with multiple battery types.
-All-round electronic protections for ultra safety.
-Compact and robust design with CE certification.
-Smart 3-stage charging: bulk, boost, and float.
-Protect your starter battery.

The 20A DC to DC Battery Charger is the most effective way to charge your house/secondary 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! If you have any questions regarding this product, please submit a case !

Empower Your Journey on the Go
Maximize charging efficiency on the go with enhanced versatility.
Compatible with Multiple Battery Types
The DC-DC battery charger is highly compatible with AGM, Flooded, Gel, and Lithium batteries, ensuring optimal performance for various battery types.
Seamless Charging, Ultimate Safety
Isolated input/output with multifunctional safety technology for error-free and secure house battery charging.
Protect Your Starter Battery
Renogy's DC-DC battery charger works seamlessly with traditional and smart alternators. The included D+ Ignition cable identifies generator starts, safeguarding the starting battery from over-discharge and protecting the generator. (Recommended: 18-16AWG copper cable. D+ Ignition Cable not included.)
Smart Charging Protection
The DC-DC battery charger's LC wire automatically adjusts the charging current, safeguarding the house battery from potential damage due to excessive charging. (Recommended: 18-16AWG copper cable. LC cable not included.)
Smart 3-Stage Charging
Efficiently charge your house batteries from the starter battery with Bulk, Boost, and Float stages, ensuring automatic and optimal charging up to 100%.
Prolong Battery Lifespan
Automatically adapts charging modes to match battery voltages, while the temperature sensor provides -3mV/°C/2V compensation, ensuring optimal charging in varying temperatures. (Please note that the temperature sensor is not included. If the lithium battery has a built-in BMS, an external temperature sensor is unnecessary.)
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Renogy 20A DC to DC Battery Charger  
Nominal Voltage: 12V Rated Charge Current: 20A
Output: 250W 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: 8.31 x 6.89 x 2.68 inches / 21.1 x 17.5 x 6.8 cm
Weight: 2.93lbs / 1.33kg  
Package includes:  
The first option: battery charger x1 The second option: battery charger x1 and temperature sensor x1

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!  
12V 20/40A DC to DC Battery Charger w/o Solar Input Datasheet
12V 20/40A DC to DC Battery Charger w/o Solar Input Maunal

19 Reviews Hide Reviews Show Reviews

  • 5
    nice item

    Posted by moodyblues18 on Aug 14th 2023

    nice item, as described, excellent service

  • 5
    Looks a good item

    Posted by andyt438 on Aug 14th 2023

    Looks a good item, well packaged.

  • 5
    great service and super fast delivery thanks +++++

    Posted by charlie*20 on Aug 14th 2023

    great service and super fast delivery thanks +++++

  • 5
    Great seller

    Posted by wildboar-outdoor on Aug 14th 2023

    Great seller, prompt delivery

  • 5
    Fast delivery Super great item A*****

    Posted by vxpete on Aug 14th 2023

    Fast delivery Super great item A*****

  • 5
    Thank you for great service

    Posted by fisher005 on Aug 14th 2023

    Thank you for great service.

  • 5
    Great price and fast delivery

    Posted by mcrtchly on Aug 14th 2023

    Great price and fast delivery, recommended

  • 5
    good service thanks

    Posted by agosto4 on Aug 14th 2023

    good service thanks

  • 5
    Nice item and good delivery too

    Posted by vince_s on Aug 14th 2023

    Nice item and good delivery too.