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 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 RVs, 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), ensuring it optimally and automatically charges to 100%.
Various Protections For Ultra Safety
The DC-DC battery charger isolates the input and output to prevent voltage transmission errors and prevents interference with house battery charging. It has multifunctional safety technology, including over-voltage protection, over-temperature protection, and reverse polarity protection to make it safer.
Protect Your Starter Battery
This Renogy DC-DC battery charger is compatible with traditional and smart alternators. The D+ Ignition cable detects whether the generator is started, preventing over-discharge of the starting battery and protecting 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 overcharging, which could damage the house battery. 18-16AWG copper cable recommended. Please note the LC cable is not included.
Prolong Battery Lifespan
It selects the charging mode according to the battery voltage. By utilizing the DC-DC temperature sensor, the charger protects your battery from high or low temperatures by providing -3mV/°C/2V compensation. This helps the charger recognize the voltage more accurately and ensures stable, constant charging. Please note the temperature sensor is not included, and it cannot be used with Lithium batteries.
This diagram shows the whole connection of the DC-DC On-Board Battery Charger.
Package Includes
Renogy 20A DC to DC Battery Charger
x 1
System Voltage
12VDC
Rated Charge Current
20A
Rated Max Power
250W
Idle Power Consumption
<0.4A
Input Voltage Range
8V-16V
Weight
1.3 kg
Equalization Voltage
N/A
Float Voltage
13.2-13.8v
Boost Voltage
14.1-14.7v
Operating Temperature
-20°C to +50°C
Dimensions
211 x 175 x 68 mm
Certification
CE ROHS
WARRANTY INFORMATION
Accessories: 1-year material warranty
Frequently Asked Questions
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
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.
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.
