• Renogy DCDC with MPPT Battery Charger on a white background
  • Diagram showing a battery, power converter, and solar panel with text about voltage boost and efficiency.
  • Compact waterproof DC-DC charger with a car driving through water, emphasizing its IP67 rating.
  • Solar panel system with charging mode auto-switching feature, showing solar panels, alternator, and battery charger.
  • Diagram of a truck with solar panels and batteries labeled 'Starter Battery' and 'House Battery' on a light blue background.
  • Smartphone app for energy monitoring with a vehicle and rooftop tent in the background
  • Renogy battery charger with features highlighted on a blue background
  • Advertisement for Renogy battery products with text about battery types and system upgrades.
Renogy DCDC with MPPT Battery Charger on a white background
Diagram showing a battery, power converter, and solar panel with text about voltage boost and efficiency.
Compact waterproof DC-DC charger with a car driving through water, emphasizing its IP67 rating.
Solar panel system with charging mode auto-switching feature, showing solar panels, alternator, and battery charger.
Diagram of a truck with solar panels and batteries labeled 'Starter Battery' and 'House Battery' on a light blue background.
Smartphone app for energy monitoring with a vehicle and rooftop tent in the background
Renogy battery charger with features highlighted on a blue background
Advertisement for Renogy battery products with text about battery types and system upgrades.
Excellent 4.8 across all reviews

Renogy

Renogy 12V/24V IP67 50A DC-DC Battery Charger with MPPT

SKU RBC2125DS-21W-US
$399.99
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Renogy DCDC with MPPT Battery Charger on a white background Diagram showing a battery, power converter, and solar panel with text about voltage boost and efficiency. Compact waterproof DC-DC charger with a car driving through water, emphasizing its IP67 rating. Solar panel system with charging mode auto-switching feature, showing solar panels, alternator, and battery charger. Diagram of a truck with solar panels and batteries labeled 'Starter Battery' and 'House Battery' on a light blue background. Smartphone app for energy monitoring with a vehicle and rooftop tent in the background Renogy battery charger with features highlighted on a blue background Advertisement for Renogy battery products with text about battery types and system upgrades.
Renogy DCDC with MPPT Battery Charger on a white background Diagram showing a battery, power converter, and solar panel with text about voltage boost and efficiency. Compact waterproof DC-DC charger with a car driving through water, emphasizing its IP67 rating. Solar panel system with charging mode auto-switching feature, showing solar panels, alternator, and battery charger. Diagram of a truck with solar panels and batteries labeled 'Starter Battery' and 'House Battery' on a light blue background. Smartphone app for energy monitoring with a vehicle and rooftop tent in the background Renogy battery charger with features highlighted on a blue background Advertisement for Renogy battery products with text about battery types and system upgrades.
Renogy DCDC with MPPT Battery Charger on a white background
Excellent 4.8 across all reviews

Renogy

Renogy 12V/24V IP67 50A DC-DC Battery Charger with MPPT

SKU RBC2125DS-21W-US

Have Questions?

Talk to an Expert

Our U.S.-based team can help you choose the right gear, configure the perfect setup, or put together a custom quote for your project.

Call (877) 834-4299 Request a Quote

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Estimated Shipping Time

We offer free shipping on all orders across the contiguous United States. Orders are typically processed within 1–3 business days, and standard delivery takes 5–10 business days. Freight and oversized items take 10–21 business days and may require a scheduled delivery.

What Is Your Return Policy?

We offer a 30-day return window on eligible items from the date of delivery. Products must be unused, in original condition, and returned in their original packaging. To start a return, contact us at support@adventuremotion.com or call (877) 834-4299. Return shipping costs may apply for non-defective items. Damaged or defective items are replaced at no cost to you.

Frequently Asked Questions

Do you offer financing?

Yes — we partner with Affirm so you can split your purchase into easy monthly payments with 0% APR options. Just select Affirm at checkout.

Are you an authorized dealer?

Yes. Adventure Motion is an authorized online dealer for all brands we carry. That means your manufacturer warranty is fully valid and protected.

Can you help me choose the right product?

Absolutely. Call us at (877) 834-4299 or email support@adventuremotion.com — our team specializes in outdoor gear and can match you to the right product.

What if my item arrives damaged?

Contact us within 48 hours of delivery at support@adventuremotion.com. We'll arrange a replacement at zero cost to you — no questions asked.

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The Renogy 12V/24V IP67 50A DC-DC Battery Charger with MPPT is a compact, fully sealed dual-input charger that keeps a house battery topped up from both the vehicle alternator and solar panels. Its boost and buck logic lets it work across 12V and 24V setups, so a 12V source can charge either a 12V or a 24V house battery, which makes it a flexible choice for vans, RVs, and other mobile power builds.

When sunlight is available the charger favors solar input and switches over to alternator power automatically when needed, delivering up to 50A and 720W of output without manual intervention. It works with both smart and traditional alternators, can send a trickle charge back to the starter battery, and supports AGM, gel, flooded, lithium, and user-defined battery profiles.

The slim sheet-metal body is filled with potting compound for water resistance and carries an IP67 rating, so it can be mounted in tight or exposed spots. Built-in Bluetooth connects to the Renogy DC Home or Core app for live charging data and settings, and wired CAN communication is also available.

What's in the Box

  • 1 x IP67 50A DC-DC Battery Charger with MPPT
  • 1 x Battery Temperature Sensor
  • 4 x Terminal Rings
  • 1 x Install Screw (ST4*20mm)

Electrical

  • System Voltage: 12V/24V
  • Solar Input Voltage: 50 VDC
  • Output Voltage: 9–32 VDC
  • Alternator Input Voltage: 9–32 VDC
  • Maximum Output Current:
    12V @ 50A
    24V @ 25A
  • Output Power: 720W
  • Battery Types Supported: AGM/SLD, GEL, Flooded (FLD), Lithium (LI), User-Defined
  • Input Fuse Rating: 60A–80A
  • Output Fuse Rating: 75A–100A
  • MPPT Tracking Efficiency: 99%
  • MPPT Charging Efficiency: 97%
  • Conversion Efficiency: 94%
  • Temperature Compensation:
    Non-Lithium: -3mV/°C/2V
    Lithium: 0mV/°C/2V (No compensation)
  • Idle Power Consumption: <100mA

General Data

  • Model: RBC2125DS
  • Terminal Range: 8AWG–4AWG
  • Communication Protocols: Modbus, RV-C
  • Operating Temperature: -31°F to 176°F (-35°C to 80°C)
  • Storage Temperature: -40°F to 212°F (-40°C to 100°C)
  • Humidity: 0%–95% (non-condensing)
  • Maximum Operating Altitude: 3500m
  • Enclosure Rating: IP67 (waterproof & dustproof)
  • Dimensions: 7.01 × 4.78 × 1.47 in (178.2 × 121.5 × 37.5 mm)
  • Weight: 4.10 lb (1.86 kg)
  • Certifications: UL1741, CE, RoHS, FCC Part 15 Class B
  • Built-In Protections:
    Reverse Polarity
    Overvoltage
    Over-discharge
    Overcurrent
    Over-temperature

Warranty

  • Material & Workmanship Warranty: 5-year material warranty
  • Charge Controllers: DCCS Dual Input
  • Battery Chargers: DCCS Dual Input

  • Dual charging from alternator and solar with automatic mode switching that gives priority to solar power
  • Boost and buck logic supports 12V or 24V inputs charging 12V or 24V house batteries
  • Up to 50A (12V) or 25A (24V) output with 720W of charging power
  • MPPT tracking efficiency of 99% for solar input up to 50V
  • Compatible with both smart and traditional alternators
  • IP67 waterproof and dustproof enclosure with full glue filling and a drop-resistant sheet-metal casing
  • Operates from -31°F to 176°F (-35°C to 80°C)
  • Built-in Bluetooth monitoring through the Renogy DC Home or Core app, plus wired CAN communication
  • Trickle charges the starter battery
  • Protection against reverse polarity, overvoltage, over-discharge, overcurrent, and over-temperature

What is the significance of the system voltage value of 12/24v-12/24v for this ip67 charger?
When the ip67 charger is connected to a solar panel, it can use a 12v solar panel to boost the voltage to charge a 24v house battery, or buck the voltage to charge a 12v house battery. when the charger is connected to the starter battery, a 12v starter battery can be used to boost the voltage to charge a 24v house battery, or directly charge a 12v house battery.
What are the solar input requirements for this charger?
The charger supports up to 720w of solar input, is compatible with solar panel input voltages up to 50v, and works with both rigid and flexible solar modules.
What type of alternator is this charger compatible with?
The charger is compatible with both smart alternators and traditional alternators. because each alternator type has different working voltages, the charger’s built-in bluetooth allows you to connect to the renogy dc home or core app and adjust the appropriate input voltage based on your alternator’s characteristics.
How do i set the battery type on this charger?
There are two ways to set the battery type: (1) use the physical button next to the “type” indicator on the charger and press briefly to cycle through available battery types. (2) use the built-in bluetooth function to connect to the renogy core or dc home app and select the desired battery type in the app.
How can i view system and charging data without a display?
This charger includes bluetooth communication, so you can connect it to the renogy core or dc home app to view real-time charging data, system status, and settings directly from your phone or tablet.

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