Renogy Dual Input DC-DC On-Board with MPPT Battery Charger

Before Getting Started

This quick guide provides important operation and maintenance instructions for the Renogy 12V/24V 50A IP67 Dual Input DC-DC On-Board with MPPT Battery Charger (hereinafter referred to as battery charger).

⚠️ Read the quick guide carefully before operation and save it for future reference. Failure to observe the instructions or precautions in the quick guide can result in electrical shock, serious injury, or death, or can damage the battery charger, potentially rendering it inoperable.

Online Manual

Access the full online manual and quick guide via QR codes:

• Quick Guide: [QR Code for Quick Guide]
• User Manual: [QR Code for User Manual]

What's In the Box?

The following items are included:

• Renogy 12V/24V 50A IP67 Dual Input DC-DC On-Board with MPPT Battery Charger x 1
• Quick Guide x 1
• Mounting Screws x 4 (ST4*20 mm)
• Battery Temperature Sensor (3 m) x 1
• 15/32 in Lugs (M12 Ring Terminals) x 4

⚠️ Make sure that all accessories are complete and free of any signs of damage.

⚠️ The accessories and product manual listed are crucial for the installation, excluding warranty information and any additional items. Please note that the package contents may vary depending on the specific product model.

⚠️ The 15/32-inch lugs (M12 ring terminals) are used to connect the starter battery on your vehicle to your auxiliary battery.

Illustration shows the battery charger unit, a folded quick guide, four mounting screws, a battery temperature sensor with cable, and four ring terminal lugs.

Dimensions

Diagram shows the physical dimensions of the Renogy DC-DC MPPT Battery Charger. Key dimensions include: Length 12 in (305 mm), Width 4.84 in (123 mm), Height 4.06 in (103 mm). Port dimensions are also indicated, such as 0.2 in (5 mm) for cable entry. Overall dimensions are approximately 7 in (178 mm) long and 4.72 in (120 mm) wide. A dimension tolerance of ±0.2 in (0.5 mm) is noted.

Get to Know Renogy Battery Charger

Illustration of the Renogy DC-DC MPPT Battery Charger with labels pointing to its components: Bluetooth Antenna, Battery Type Setting Button, Solar Charging Indicator, Alternator Charging Indicator, Battery Type Indicator, Auxiliary Battery Indicator. It also shows the cable connections: Positive Auxiliary Battery Cable (brown), Positive Solar Cable (yellow), Battery Temperature Sensor Cable (with connectors), Positive Starter Battery Cable (red), Negative Common Cable (black). Mounting Holes and CAN Communication Ports are also indicated.

Notes:

• The battery temperature sensor cable can only be used with lead-acid batteries.
• For CAN Communication Ports wiring details, refer to the user manual of the battery charger at renogy.com/support/downloads.

System Setup

Wiring diagram illustrating the system setup. It shows connections between Solar Panel(s), an Auxiliary Battery (12V/24V), a Starter Battery, the Renogy DC-DC MPPT Battery Charger, and RV-C or Renogy devices supporting CAN communication. A legend indicates lines for Positive (red), Negative (black), Temperature (purple), and Communication (cyan).

Recommended Tools & Accessories

The following tools and accessories are recommended for installation:

• Phillips Screwdriver (#1)
• Insulating Gloves
• Wire stripper
• Insulation Tape
• Manual Hydraulic Pliers
• Heat Gun
• Heat Shrink Tubing
• Measuring Tape

Illustrations show each of the recommended tools and accessories.

Components for Wiring

The following wiring components are used:

• Bare Wires
• Butt-Splices
• Busbar (60A to 100A)
• 3/8 in Lugs (M10 Ring Terminals)

⚠️ Prior to installing and configuring the battery charger, prepare the recommended tools, components, and accessories.

⚠️ The 3/8-inch lugs (M10 ring terminals) are used to connect the busbar and ANL fuse.

In this manual, the red cable represents the positive cable, and the gray cable represents the negative cable.

Illustrations show bare wires, butt-splices, a busbar with multiple terminals, and several 3/8 inch ring terminal lugs.

How to Size Wires?

Select proper bare wires based on the cable length in your power system. Refer to the table below for recommended gauge sizes.

⚠️ The cable specifications listed above account for critical, less than 3% voltage drop and may not account for all configurations.

⚠️ The specification of fuse cable is consistent with the input or output terminal of the battery charger.

How to Install 15/32 in Lugs or 3/8 in Lugs?

Follow these steps to properly install lugs onto wires:

1. Strip approximately 0.4 in (10 mm) of insulation from the wire end.
2. Slide a piece of heat shrink tubing over the wire, ensuring it covers the area where the lug will be crimped.
3. Insert the stripped wire end into the lug barrel.
4. Ensure the heat shrink tubing is positioned correctly to cover the crimped area after heating.
5. Use manual hydraulic pliers to crimp the lug securely onto the wire.
6. Slide the heat shrink tubing over the crimped connection.
7. Use a heat gun to shrink the tubing, creating a secure and insulated connection.

A series of illustrations show the steps: stripping wire, sliding heat shrink tubing, inserting wire into lug, crimping with pliers, and heating the tubing.

How to Install Cables on the Battery Charger?

Positive Cable

The illustrations show the process for the Positive Auxiliary Battery Cable. Butt-splice connectors and heat shrink tubings are used.

1. Connect the bare wire end of the battery charger's positive cable to the corresponding wire (e.g., brown for auxiliary).
2. Prepare the positive cable for connection (e.g., red bare wire).
3. Slide heat shrink tubing onto the cable.
4. Insert the prepared cable end into a butt-splice connector.
5. Crimp the butt-splice connector securely.
6. Slide the heat shrink tubing over the crimped connection.
7. Use a heat gun to shrink the tubing, creating a sealed connection.

Illustrations depict connecting wires using butt-splices and heat shrink tubing for positive cables.

Negative Cable Installation

For the negative terminals, a busbar is recommended. Install the 3/8-inch lugs (M10 ring terminals) on the solar panel, auxiliary battery, starter battery negative cables, and the battery charger's negative common cable (black) onto the busbar.

Diagram shows the negative cable from the battery charger connecting to a busbar using a 3/8 inch lug. A close-up shows the connection with a nut and washer.

Step 1. Plan a Mounting Site

The battery charger requires adequate clearance for installation, wiring, and ventilation. The minimum clearance is provided below.

Diagram shows the battery charger mounted on a surface with required clearance of 5.91 inches (150 mm) on all sides (top, bottom, left, right). It also indicates environmental operating conditions: Temperature range from -31°F to 176°F (-35°C to 80°C) and Humidity from 0% to 95%. Icons represent temperature, humidity, fragility, and ventilation.

⚠️ The battery charger should be installed on a flat surface protected from direct sunlight.

Step 2. Connect the Battery Charger to a Busbar

Connect the negative common cable (black) from the battery charger to the busbar using a 3/8 in lug (M10 Ring Terminal).

Illustration shows the negative common cable being connected to the busbar with a 3/8 inch lug. A close-up view details the connection with a nut and washer.

Step 3. Connect the Battery Charger to an Auxiliary Battery

The battery charger is compatible with 12V or 24V deep-cycle gel-sealed lead-acid batteries (GEL), flooded lead-acid batteries (FLD), sealed lead-acid batteries (SLD/AGM), or lithium iron phosphate batteries (LI).

Recommended Components & Accessories

• 12V/24V Battery (11V to 32V)
• ANL Fuse (60A) x 1

⚠️ Components and accessories marked with "*" are available on renogy.com.

⚠️ For installation details, see the user manual of the battery in use.

⚠️ Always connect the battery charger to a battery before connecting it to a solar panel to ensure safe and efficient operation.

Illustrations show a 12V/24V battery and an ANL fuse holder.

Step 4. Connect the Battery Charger to a Solar Panel

• For 12V batteries, the maximum charging current from solar panels is 50A.
• For 24V batteries, the maximum charging current from solar panels is 25A.

Recommended Components & Accessories

• Solar Panel (s)
• Solar Panel Fuse
• Solar Panel Extension Cables

⚠️ Components and accessories marked with "*" are available on renogy.com.

⚠️ Connecting the battery charger to a solar panel exceeding 720W (≤50V) results in damage to the battery charger.

⚠️ The appropriate current rating for the solar panel fuse should be determined by multiplying the total short current amperage of the solar panel array by 1.56.

Illustrations show a solar panel, a solar panel fuse holder, and solar panel extension cables.

Step 5. Connect the Battery Charger to a Starter Battery

Before installing the charger, consult your vehicle's user manual or contact the vehicle manufacturer to ensure that the output current ranges from 75A to 100A.

The starter battery stops charging the auxiliary battery when the starter battery voltage drops below 12.7V for 12V systems or 25.4V for 24V systems.

Recommended Accessories

• ANL Fuse (70A) x 1

⚠️ Accessories marked with "*" are available on renogy.com.

⚠️ The starter battery stops charging the auxiliary battery when the starter battery voltage drops below 12.7V for 12V systems or 25.4V for 24V systems.

⚠️ The battery charger can be connected separately to the solar panel for charging the auxiliary battery or to the vehicle's starting battery for charging the auxiliary battery.

Illustration shows an ANL Fuse (70A).

Step 6. Install a Battery Temperature Sensor

The temperature sensor measures the surrounding temperature of the battery and compensates the floating charge voltage when the battery temperature is low.

⚠️ Do not use the temperature sensor on a LiFePO4 (LFP) battery which comes with a battery management system (BMS).

Mount the sensor securely at a suitable location in close proximity to the battery.

Diagram shows the battery temperature sensor cable connected to the battery charger and the sensor probe positioned near an auxiliary battery.

LED Indicators

The battery charger turns on automatically after power on with the LED indicators working in accordance with the relative operating status.

Solar Charging Indicator

• Off: Not charging
• Solid: MPPT charging
• Slow flash: Boost charging
• Single flash: Float charging
• Double flash: Limited-current charging
• Fast flash: Equalization charging

Alternator Charging Indicator

• Off: Not charging
• Solid: The starter battery connected to the alternator is charging the auxiliary battery.
• Slow flash: The solar panel is charging the starter battery.

Battery Type Indicator

• Solid: FLD (Flooded Battery)
• Solid: GEL (Gel Battery)
• Solid: SLD/AGM (Sealed Lead Acid Battery)
• Solid: 12V LI (12V Lithium Battery)
• Solid: 24V LI (24V Lithium Battery)
• Solid: User Mode (Custom Battery)

Auxiliary Battery Indicator

• Off: No battery detected
• Solid: Full charge
• Solid: Normal battery voltage
• Solid: Undervoltage warning
• Slow flash: Overdischarge warning
• Fast flash: Overtemperature/Overvoltage warning

Diagram shows the indicator LEDs on the battery charger labeled Solar, Alt, Bat, Type, and their corresponding functions.

LED Patterns

Check out the graphic indications of ON, OFF, Solid, Slow Flash, Fast Flash, Single Flash, and Double Flash of LEDs in the table below:

Set a Battery Type

Upon installing the battery charger, set a correct battery type by using the Battery Type Setting Button. For non-lithium batteries, the battery charger can automatically detect their voltage (12V or 24V).

⚠️ It is essential to ensure that the battery type setting is configured correctly to avoid any potential damage to the battery charger because any damage to the battery charger resulting from an incorrect battery type setting voids the warranty.

Diagram shows the battery charger with different battery types (FLD, GEL, SLD/AGM, 24V LI, 12V LI, User Mode) indicated by colored paths leading to the 'Type' button. The paths show how to cycle through types by pressing the button.

USER Mode

Setting the battery type to User Mode allows you to customize your battery parameters. You can modify the parameters in the DC Home app.

⚠️ When customizing settings, consult the user manual provided by the battery manufacturer. If necessary, contact the manufacturer for further assistance.

For detailed parameter settings, see the user manual of the battery charger at renogy.com/support/downloads.

Illustration shows a hand pressing the 'Type' button on the battery charger, with an arrow pointing to a smartphone displaying the DC Home app interface showing customizable parameters like Battery Type, House Battery Volts, Starter Battery Volts, etc.

Monitor the Battery Charger

Download the DC Home app. Login to the app with your account.

A QR code is displayed for downloading the DC Home app. Below it are icons for Google Play and the App Store.

⚠️ For CAN communication details, see the user manual of the battery charger at renogy.com/support/downloads.

⚠️ The version of the DC Home app might have been updated. Illustrations in the user manual are for reference only. Follow the instructions based on the current app version.

⚠️ To ensure optimal system performance, keep the phone or RENOGY ONE within 10 feet (3 m) of the battery charger.

⚠️ You can receive fault alarms on DC Home and Renogy ONE when the battery charger is faulty. Please login to the DC Home app or Renogy ONE for troubleshooting details.

Short-Range Monitoring via DC Home App

Pair the battery charger with the DC Home app. Monitor and modify the parameters of the battery charger via the app.

A sequence of smartphone screen mockups illustrates the pairing process: 'My Renogy' screen showing 'No device found', then a 'Searching for device' screen with Bluetooth pairing instructions, and finally a 'My Renogy' screen showing the connected 'DC-DC' controller.

Wireless Long-Range Monitoring

Utilize the RENOGY ONE Core for wireless long-range monitoring.

Diagram shows the Renogy DC-DC MPPT Battery Charger communicating via Bluetooth to a RENOGY ONE Core device, which then connects to the internet. A smartphone displays the 'My Renogy' app interface, showing device status.

Important Safety Instructions

General

• Wear proper protective equipment and use insulated tools during installation and operation.
• Do not wear jewelry or other metal objects when working on or around the battery charger.
• Keep the battery charger out of the reach of children.
• Do not dispose of the battery charger as household waste. Comply with local, state, and federal laws and regulations and use recycling channels as required.
• In case of fire, put out the fire with a FM-200 or CO₂ fire extinguisher.
• Installing the battery charger improperly on a boat may cause damage to components of the boat. Have the devices installed by a qualified electrician.
• Do not expose the battery charger to flammable or harsh chemicals or vapors.
• Clean the battery charger regularly.
• Do not puncture, drop, crush, penetrate, shake, strike, or step on the battery charger.
• Do not open, disassemble, repair, tamper with, or modify the battery charger.
• Connect the negative prior to the positive terminal when connecting any device.
• It is recommended that all cables should not exceed 10 meters because excessively long cables result in a voltage drop.
• The cable specifications listed in the quick guide account for critical, less than 3% voltage drop and may not account for all configurations.

Battery Charger Safety

• Install the battery charger on a vertical surface - protected from direct sunlight, high temperatures, and water. Make sure there is good ventilation.
• Keep the battery charger away from heating equipment.
• Do not insert foreign objects into the battery charger.
• Confirm the polarities of the devices before connection. A reverse polarity contact can result in damage to the battery charger, thus voiding the warranty.
• Do not touch the connector contacts while the battery charger is in operation.
• Disconnect all connectors from the battery charger before maintenance or cleaning.

Battery Safety

• Do not use batteries if there is any damage.
• Do not touch the exposed electrolyte or powder if the battery is damaged.
• Risk of explosion! Never install the battery charger in a sealed enclosure with flooded batteries! Do not install the battery charger in a confined area where battery gases can accumulate.
• Prior to installing the battery charger, ensure all battery groups are installed properly.

Solar Panel Safety

• Do not use the solar panel(s) if there is any damage.
• Prior to connecting the battery charger to the solar panel(s), shade the solar panel(s).
• Always connect the battery charger to the battery first before connecting it to the solar panel. This prevents damage caused by open-circuit voltage from the solar panel.

Renogy Support

To discuss inaccuracies or omissions in this quick guide or user manual, visit or contact us at:

• renogy.com/support/downloads
• contentservice@renogy.com

A QR code is displayed for a Questionnaire Investigation.

To explore more possibilities of solar systems, visit Renogy Learning Center at: renogy.com/learning-center

Technical Support

For technical questions about your product in the U.S., contact the Renogy technical support team through:

• renogy.com/contact-us
• 1(909)2877111

For technical support outside the U.S., visit the local website below:

FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause undesired operation.

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
4. Consult the dealer or an experienced radio/TV technician for help.

FCC Radiation Exposure Statement

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

Disclaimer

Renogy 12V/24V 50A IP67 Dual Input DC-DC On-Board with MPPT Battery Charger Quick Guide © 2024 Renogy. All rights reserved.

RENOGY and RENOGY are registered trademarks of Renogy.

• All information in the quick guide is subject to copyright and other intellectual property rights of Renogy and its licensors. The quick guide may not be modified, reproduced, or copied, in whole or in part, without the prior written permissions of Renogy and its licensors.
• The registered trademarks in the quick guide are the property of Renogy. The unauthorized use of the trademarks is strictly prohibited.
• Renogy ensures the accuracy, sufficiency, and the applicability of information in the quick guide at the time of printing due to continual product improvements that may occur.

• Renogy assumes no responsibility or liability for personal and property losses, whether directly and indirectly, caused by the user's failure to install and use the product in compliance with the quick guide.
• Renogy is not responsible or liable for any failure, damage, or injury resulting from repair attempts by unqualified personnel, improper installation, and unsuitable operation.
• The illustrations in the quick guide are for demonstration purposes only. Details may appear slightly different depending on product revision and market region.
• Renogy reserves the right to change the information in the quick guide without notice. For the latest quick guide, visit renogy.com.

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Renogy reserves the right to change the contents of this quick guide without notice.

Manufacturer Information

Manufacturer: RENOGY New Energy Co., Ltd

Address: No.66, East Ningbo Road Room 624-625, Taicang German Overseas Students Pioneer Park, JiangSu 215000 CN

Representative (EC REP): eVatmaster Consulting GmbH, Battinastr. 30, 60325 Frankfurt am Main, Germany. Contact: contact@evatmaster.com

Representative (UK REP): EVATOST CONSULTING LTD, Suite 11, First Floor, Moy Road Business Centre, Taffs Well, Cardiff, Wales, CF15 7QR. Contact: contact@evatmaster.com

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