12V 20A DC to DC Battery Charger
5(35) 12V 20A DC to DC Battery Charger
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SKU: RNG-DCC1212-20-AU
AU$149.99 AU$119.99
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AU stock, usually ships in 1 to 3 business days.

Key Features
-Compatible with multiple battery types.
-Smart 3-stage charging: bulk, boost, and float.
-All-round electronic protections for ultra safety.
-Protect your starter battery.
-Compact and robust design with CE certification.
-Footy Frenzy Sale: Use code POWER50 to enjoy up to 50% off on any items. Click here to know more about Save big on September!

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! Click here to know more about the inverter of the 2nd bundle option: Renogy 1000W 12V to 230V/240V Pure Sine Wave Inverter (with UPS Function)!

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: Temperature sensor not included, not compatible with Lithium batteries.)
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Package Includes

  • If you have any questions regarding this product, please call us at 1 (909) 287-7111 or submit a ticket for troubleshooting assistance.
  • More questions about your off-grid power system? Learn more from Renogy Learning Center!

Renogy ONE Core


1 x


Quick Guide




Power Cable




Mounting Screw


M3.5 x14mm x5


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!  
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Reviews Hide Reviews

Thank you for an easy

noelontherun on Aug 14th 2023

Thank you for an easy, pleasant transaction

Great seller

jcr250 on Aug 13th 2023

Great seller, super fast postage, perfect


tra056 on Aug 13th 2023


All good

au5066 on Aug 13th 2023

All good.

On time delivery and works as advertised

630500 on Aug 11th 2023

On time delivery and works as advertised

Product as described

okrustyone on Aug 10th 2023

Product as described, thanks.


leo36681 on Aug 10th 2023


Arrived quickly exactly as described

floater1107 on Aug 8th 2023

Arrived quickly exactly as described. Am yet to fit it