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30A/50A 12V DC-DC On-Board Battery Charger with MPPT

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  • 30A 12V  DC-DC On-Board Battery Charger with MPPT w/Renogy ONE CORE
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CAD $249.99
CAD $329.99

30A/50A 12V DC-DC On-Board Battery Charger with MPPT

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CAD $249.99
CAD $329.99
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Renogy 50A DC-DC On-Board Battery Charger with MPPT
30A/50A 12V DC-DC On-Board Battery Charger with MPPT
CAD $249.99
CAD $329.99
  • 30A 12V  DC-DC On-Board Battery Charger with MPPT w/Renogy ONE CORE
CAD $249.99
CAD $329.99
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Renogy 50A DC-DC On-Board Battery Charger with MPPT

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Renogy's DC to DC MPPT on-board Battery Charger is designed to give you options! This multi-stage, multi-input battery charger can charge a service battery from a starting battery linked to an alternator or by utilizing solar panels connected directly to the unit. While your vehicle's alternator prioritizes your starting battery, this unit will allow your solar system to charge your service battery first! It's the smart way to keep yourself fully charged and off-grid longer! And with multi-stage charging and multi-chemistry functionality, Renogy's DC to DC MPPT Charger has you covered whether you're using Flooded, Gel, AGM, or Lithium batteries. With RJ45 communication port featured, you can unlock monitoring features exclusively using the BT-2 Bluetooth Module and Renogy DC Home App, control and monitor the device remotely through your phone in real time.

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Key Features

    • Multi-input for Battery Charging
    • Renogy DC-DC On-Board Battery Charger is designed to charge service batteries from a starting battery linked to an alternator or by utilizing solar panels connected directly to the unit, offering multiple charging options and ensuring your battery stay fully charged.
  • 3-phase MPPT Charging Technology
    With Built-in Maximum Power Point Tracking (MPPT), Renogy DC-DC On-Board Battery Charger will charge your service batteries with maximized solar power, providing 3-phase charging (Bulk, Boost and Float) to regulate the whole charging and ensure the batteries will be accurately charged at the correct voltage levels to 100%.
  • Multiple Protections
    Renogy DC-DC On-Board Battery Charger has multiple intelligent protections includes battery isolation, over-voltage protection, battery temperature protection, over-current protection, overheat protection, reverse current protection, solar panel and alternator reverse polarity protection, guaranteeing charging safety and protecting your batteries.
  • Light & Small, Ready to be Set Up
    With only 9.6in in length, 5.7in in height, and 3.13lbs in weight, Renogy DC-DC On-Board Battery Charger is ready to be installed and adapt to any tiny narrow installation space, resolving your concern from limited room in your vehicle.
  • Works With RENOGY ONE&RJ45 Communication Port Featured
        Exclusively available with the BT-2 Bluetooth Module accessory and Renogy DC Home App available on the IOS and Google Play Stores, you can monitor this device remotely and simply through your phone and stay constantly updated.
        Add Renogy ONE M1 to achieve smart energy monitoring with intuitive visuals and real-time data. This all-in-one display provides you access to accurate energy system data anywhere, anytime via the DC Home app.


Package Includes

30A/50A DC-DC On-Board Battery Charger with MPPT

12V 50A DC-DC On-Board Battery Charger with MPPT

1 x

Battery Temperature Sensor

Battery Temperature Sensor

1 x

IGN Signal Wire

IGN Signal Wire

1 x

RS485 Communication Cable

RS485 Communication Cable

1 x

OPTION:Monitoring Screen for DC-DC MPPT Battery Charger Series

Monitoring Screen

1 x

OPTIONS:BT-2 Bluetooth Module W/ RS485 Port

BT-2 Bluetooth Module W/ RS485 Port

1 x

30A Electrical Parameters 30A Mechanical Specifications
System Voltage : 12VDC Ground Type : Negative
Battery voltage Range : 9-16VDC Terminal Size : M8*1.25 - 10mm
Maximum Charging Current : 30A Temperature Compensation : -3mV/C/2V
Battery Types : SLD/AGM, GEL, FLD, LISER Operating Temperature Range : -31°F - 149°F
Service Battery Charging Mode : MPPT Storage Temperature Range : -40°F - 176°F
Charging Efficiency : Up to 97% Operating / Storage Humidity : 0%-95%, No Condensation
Max. Solar Input Voltage : 30V Dimensions : 9.6*5.7*3.0 in
Max. Solar Input Power: 400W @ 30A Weight: 3.13Ibs/1.42 kg

Alternator Input Voltage:

Traditional Alternator: 13.2-16VDC
Smart Alternator (Euro 6): 12-16VDC

Communication Protocol: RS485
Max. Alternator Input Power: 400W @ 30A Certifications:CE,ROHS,FCC Part 15 class B
Self-consumption: 60mA  
System Voltage : 12V - 12V Model: RBC50D1S
Input Voltage: 50 VDC Terminal Size: M8 x 1.25 - 10mm
Output Voltage: 9-16 VDC Terminal Range: 8AWG-4AWG
Alternator Input:Traditional Alternator: 13.2-16 VDC / Smart Alternator (Euro 6): 12-16 VDC Max. Solar Input Voltage : 50V
Maximum Output Current Rating: 50A Communication Protocol: RS485
Output Power: 660W Operating Temperature Range: -31℉ to 149℉/-35℃ to 65℃
Battery Types: AGM/SLD , GEL ,FLD ,LI,USER Storage Temperature Range: -40℉ to 176℉/-40℃ to 80℃
Input Fuse Rating: 75A-100A Humidity: 0%-95%, No Condensation
Output Fuse Rating: 75A-100A Maximum Operating Altitude: NA
Charging Efficiency: 0.94 Enclosure Rating: NA
Temperature Compensation:'-3mV / ℃ / 2V (Non-Lithium) / '0mV / ℃ / 2V (Lithium) Dimensions: 9.61 x 5.75 x 3.78 inch/244 x 146 x 96mm
Idle Power Consumption: <30mA Weight: 4.10 lb / 1.86 kg
  Certification: CE; ROHS;FCC Part 15 class B;
ETL listed to UL 1741 & CSA C22.2
  Warranty: 2-year material warranty
  Protection: Reverse Polarity Protection/Overvoltage Protection/Over Discharge Protection/Overcurrent Protection/Over Temperature Protection/Overcurrent Protection
Communication Protocol: RS232  Port Type: RJ45
Input Voltage: 5V or 12V Protection Grade: IP54
Standby Power Consumption: 0.04W Operating Power Consumption: 0.05W
Communication Range: ≤82ft Serial Baud Rate: Fixed Baud Rate 9600bps
Cable Length: 5.00 m (16.4 ft) Dimensions: 2.65 X 1.38 X 0.55 in (67.3 X 35 X 14 mm)
Installation Dimensions: 67.3 φ3.5mm(2.66 φ 0.14in) Operation Temperature: -4°F to 185°F (-20℃~85℃)
Weight: 130g (4.58oz) Certifications:FCC Class B Part 15 Compliant
Supply Voltage: 5VDC Communication Port: RJ45 (RS485 Protocol)
Supply Current: 30mA Display: Backlit LCD
Power Consumption: <1W  User Interface: 4 Front Menu Buttons
Operating Temperature Range: -4°F~113°F / -20°C~45°C Mounting System: Wall Mount
Cable Length: 5.00 m (16.4 ft) Voltage Accuracy: ±0.1V
Dimension: 2.76 x 4.33 x 1.25 inch / 70 x 110 x 31.8 mm Operation Temperature: -4°F to 185°F (-20℃~85℃)
Current Accuracy: ±0.1A Weight: 0.14 lbs / 62 g

Warranty Information

Material and workmanship warranty 2 Year


1. What type of alternator is this on-board battery charger compatible with?
This battery charger is compatible with both traditional and smart alternators. However, since standard/traditional alternator has a fixed voltage when charging, while smart alternator has a controlled charging output based on operating conditions, it is required to connect the charger to the smart alternator through the Vehicle Ignition Port by the IGN Signal Wire comes with the package.
2. What will happen if the service battery is fully charged?
This Renogy's DC to DC MPPT on-board Battery Charger has a built-in Voltage Sensitive Relay (VSR), thanks to which the charger will Trickle Charge the service battery and maintain its fully charged status, and will also Trickle Charge the starting battery via solar panels. The VSR also ensures reliable isolation between the starting battery and service battery, avoiding charging interference.
3. What types of battery does the charger support?
This controller supports Gel, AGM, Flooded, and Lithium battery, but please make sure to set the correct battery type once it is installed. For battery settings please refer to the Manual Book on page 12&15.
4. How do I set the battery since there is no display screen?
To change the battery type you will need to press the push button that is located on the PV+ and ALT+ side of the DCDC, then continue to press the button and the LED will display different colors with each representing a single type of battery. Please refer to the manual on page 15 for Battery Type LED.
5. Notes 
1. Do not reverse the polarity since the reverse polarity of the battery connections can cause injury and damage to the device.
2. When connecting the charger and the battery, make sure the battery poles are clean when connecting the terminals, select a sufficient cross-section for the connection cable, tighten the nuts and bolts with proper torque as loose connections may cause overheating.
3. Be careful not to over-torque the terminals on the DCDC as over-torquing may cause irreparable damage (Do not exceed 16 N-m / 3.3 ft-lb).
4. Use the following cable colors:
Red: positive connection
Black: negative connection"
5.If the battery charger is connected to the starting battery and solar panels at the same time, the maximum charing current will be 25A for each; if the battery charger only connects one of the two DC inputs, the maximum charing current will be 50A.
More questions about your off-grid power system? Learn more from Renogy Learning Center!
Renogy Rover PG 20 Amp MPPT Solar Charge Controller

Please click the links below to download Manual:  RBC3050D1S Fuse Installation Instructions

19 Reviews Hide Reviews Show Reviews

  • 5
    So Good, We bought 2

    Posted by Westfalia Journal on Dec 13th 2023

    Originally this unit was first installed on our VW Westfalia camper van to work with 300 watts of solar. The ability to charge 2 battery banks simultaneously & isolated is fantastic in camper systems, the solar panels take care of the starter battery & house while stationary, while driving the alternator services both banks. This functions so well we are installing it on a large sailboat with flexi solar panels.

  • 5
    Great product

    Posted by Kerr Turner on Aug 3rd 2023

    I have had this set up for about a week and it’s working well. It’s well designed and easy to install. I have not used the alternator input yet but this is the main reason I bought this unit.

  • 5
    30A/50A 12V DC-DC On-Board Battery Charger with MPPT

    Posted by Daniel Gauthier on Jul 5th 2023

    The product by itself work fine I have a BT-2 bluetoot interface not recognized

  • 5
    Dc to Dc charging

    Posted by Wade Viznaugh on Jun 18th 2023

    Works well, combines two units into one, saves space.

  • 5
    I Like It

    Posted by Han Derry day on Jun 8th 2023

    I use this charger with a truck/camper and I really like it. The house batteries charge while traveling. I have 400 watts of solar which takes care of the hotel loads on nice days with this unit, plus adds a trickle charge. I see about 30 amps of charging from the alternators when the truck is parked and idling if we're in one spot for multi days in bad weather. This is a great product IMO.

  • 5
    Top-notch Charger for Reliable Power

    Posted by Alexander on May 17th 2023

    The Renogy 50A 12V DCC50S DC-DC On-Board Battery Charger with MPPT is an exceptional product. Its efficiency and reliability are unmatched. The MPPT technology guarantees maximum power output, ensuring my battery is charged swiftly. The compact size allows for easy installation in tight spaces. If you're seeking a top-notch charger that delivers consistent and reliable power, this is it.

  • 4
    Efficient and Reliable Charger

    Posted by Liam on May 17th 2023

    The Renogy 50A 12V DCC50S DC-DC On-Board Battery Charger with MPPT is a game-changer. It charges my battery quickly and efficiently, and the built-in MPPT technology ensures optimal power conversion. The compact design is a plus, fitting perfectly in my setup. Highly recommend for anyone in need of a reliable charger.

  • 5
    DC charger with mppt

    Posted by Christian Breton on May 14th 2023

    Simple to hook up. Works great. Seems to work fine with non renogy solar panels, it charges my renogy 100 ah battery as intended. Like the little boost and starter battery charging. With dchome app you get a look at energy consumption and charging.

  • 5
    Chargeur DC-DC

    Posted by Michel on Mar 19th 2023

    Je vais l'expérimenter l'été prochain avec le VR, Ca devrait bien fonctionner!