Renogy 12V 20A DC to DC On Board Battery Charger 1 / 7
Renogy

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

SKU: RNG-DCC1212-20-G1-US

Brand Renogy In Stock
$109.99 In Stock
No sales tax collected at checkout where applicable.
5% off Save 5% on eligible items Copy this code and apply it at checkout when eligible. Code: GET5
Extra 5% offUse GET5 at checkout

Applies to eligible items.

Estimated delivery Calculating current delivery window…
Secure checkoutProtected payment Free shippingView shipping policy Eligible returnsView return policy Authorized dealerRenogy warranty
Free shippingAuthorized dealer

Will this run what you need?

Check your setup with our team.

Call our teamOpen Power Planner
Shipping & returnsDelivery details, return eligibility & fees

Shipping
Free shipping. Check the availability and delivery information above for your selected option.

Returns

Approval is required. The 30-day window covers eligible products that have not been used or installed, with their original packaging and supplied contents retained.

For non-defective returns, you pay return shipping and may incur restocking charges of up to 20%. Processing fees of 3–4% are not refundable. The full policy explains exceptions and how to request a return.

Shipping policy ↗Return policy ↗

Secure checkout · Protected payment
Authorized dealer · Renogy warranty

No sales tax collected at checkout where applicable.

Need help choosing? Find the right setup for you. Talk it through with our team, or size your system with the Power Planner. Call 1-844-747-6767 Open Power Planner

Quantity

Your selection

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

In Stock
Renogy 12V 20A DC to DC On Board Battery Charger
Quantity$109.99 each
1

The Renogy RNG-DCC1212-20 is a 12V-to-12V, 20A DC-to-DC charger for transferring power from a vehicle starter-battery/alternator system to a compatible 12V house battery. It is an alternator-fed charger, not a solar MPPT input.

Renogy specifies an 8–16V DC input range, adjustable charging voltage from 13.2–14.7V and up to 250W rated output for this 20A model. Set the charging profile to the house battery manufacturer’s requirements and check alternator reserve, cable size, fusing and ventilation before installation.

The unit weighs about 2.93 lb. The attached Renogy documentation provides the installation and wiring details for the exact RNG-DCC1212-20 model.

Plan alternator charging

Our RV DC-to-DC charger guide explains when a DC-to-DC charger is useful in an RV battery system and which electrical limits to check.

Compare a related option

Compare 20A and 60A DC-to-DC charging rates, alternator limits and battery acceptance before selecting a charger.

Renogy 12V 60A DC to DC On Board Battery Charger

Renogy 12V 20A DC to DC On Board Battery Charger
Package Includes
1x Renogy 12V 20A DC to DC On Board Battery Charger
Includes the selected item based on the current package option.
Renogy 12V 60A DC-DC Battery Charger
Selected variant SKU RNG-DCC1212-20-G1-US
Specifications
Model RNG-DCC1212-20
Transformation 12V to 12V
Nominal Input Voltage 12V
Input Voltage Range 8V to 16V
Charging Current 20A
Charging Voltage 13.2V to 14.7V
Output 250W
Residual Ripple of Output Voltage at Rated Current <50 mVeff
Efficiency Up to 90%
Idle Power Consumption <0.4A
Ambient Temperature for Operation -4°F to 122°F / -20°C to 50°C
Ambient Humidity ≤95% Non-Condensing
Dimensions (W x D x H) 211 x 175 x 68mm / 8.3 x 6.39 x 2.7 in
Weight 1.33kg / 2.93 lbs
Protective Function Specifications
Protections at Input High-Voltage, Low-Voltage, Reverse-Polarity, High-Temperature, Short-Circuit
Low Voltage Cut Off 8V
Low Voltage Restart 10V
High-Voltage Shutdown 16V
High Voltage Restart 15.5V
Certifications
CE Yes
📘
User Manual
Installation instructions, setup guidance, operation, and troubleshooting.
View PDF
📄
Specification Sheet
Product documentation and manufacturer terms.
View PDF
📄
Warranty Sheet
Product documentation and manufacturer terms.
View PDF

Frequently Asked Questions

Clear answers to common questions about this product, setup, compatibility, and use.

Can the Renogy 20A onboard charger accept a solar panel as a second input? No. This RNG-DCC1212-20 is the alternator-fed DC-to-DC model, not Renogy's dual-input charger with MPPT. Route solar through a separate compatible charge controller or choose a charger explicitly designed with a solar input. Will this charger work between a 12V vehicle and a 24V house battery? No. It is a 12V-to-12V onboard charger. Both the source system and house bank must match its supported nominal voltage, and the selected charging profile must match the house battery chemistry and manufacturer's limits. Will a 20A DC-to-DC charger overload a small or smart alternator? It can if the vehicle's available charging capacity and control strategy are not considered. Verify alternator reserve at idle and while driving, the required ignition or D+ connection, source-cable voltage drop, and any vehicle-manufacturer restrictions before installation. Why can input current differ from the charger's 20A battery output rating? The 20A figure describes the controlled charging output. Conversion loss and the voltage difference between the starter and house sides can make source current differ, so size both cable runs and their fuses from the manual rather than using the output number alone. What protection must be added around the onboard charger? Use correctly rated protection near both battery sources, copper conductors sized for current and round-trip distance, secure grounds, strain relief, and an accessible disconnect where required. Mount the charger within its ventilation and environmental limits and follow the specified connection order.