DCC30S 12V 30A Dual Input DC to DC Battery Charger with MPPT
5(6) DCC30S 12V 30A Dual Input DC to DC Battery Charger with MPPT
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AU$339.99 AU$279.99
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Out of stock, will shipped by 2023/04/19



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.

If you have any questions regarding this product, please submit a case !

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 you 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 you vehicle.

  • RJ45 Communication Port Featured

Bluetooth Monitoring Ready! 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.

Package Includes


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

12V 30A 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: Renogy BT-2 Bluetooth Module

Renogy BT-2 Bluetooth Module

1 x


Option: Monitoring Screen

Monitoring Screen

1 x


System Voltage : 12VDC Battery Voltage Range : 9-16VDC
Maximum Charging Current  : 30A Battery Type : SLD/AGM, GEL, FLD, LISER
Service Battery Charging Mode: MPPT Charging Efficiency : Up to 97%
Max. Solar Input Voltage : 25V Maximum Solar Input Power : 400W
Alternator Input Voltage : Traditional Alternator: 13.2-16VDC
Smart Alternator (Euro 6): 12-16VDC
Maximum Alternator Input Power : 400W
Self-consumption : 60mA Operating Temperature Range : -31°F ~ 149°F 
Dimensions : 9.6*5.7*3.0in Weight : 3.13 lbs / 1.42 kg
Communication Protocol:RS485 Ground Type:Negative
Terminal Size:M8*1.25 - 10mm Temperature Compensation: '-3mV/C/2V
Storage Temperature Range: -40°F - 176°F Operating / Storage Humidity: 0%-95%, No Condensation
Options: Monitoring Screen  
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
Wire Length: 16.4ft / 5m
Options: BT-2 Bluetooth Module  
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)
FCC Class B Part 15 Compliant YES

Warranty Information

Accessories 2-year material warranty
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.
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 input current will be 15A for each; if the battery charger only connects one of the two DC inputs, the maximum input current will be 30A.
More questions about your off-grid power system? Learn more from Renogy Learning Center!
Renogy Monitoring Screen
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Please click the links below to download Manual:
RBC3050D1S Fuse Installation Instructions
Renogy BT-2 Bluetooth Module
Renogy Monitoring Screen

Reviews Hide Reviews


Darren Buchanan on Dec 21st 2022

Works a treat Only been installed a week ago but is doing everything needed to charge the 100mamp Lithium Battery

30 amp DC DC charger with Solar.

Troy Larke on Dec 19th 2022

So happy with my Renogy gear. This unit is keeping my setup fully charged and trouble free running 24/7. I have fridge running constantly and lights etc at night. Have zero power concerns, will 100% buy again and recommend to all my friends, thanks Renogy for a great product.

30a dcdc

Matt Gilfillan on Apr 18th 2022

Recently purchased the renogy 30a dcdc & to same I'm amazed as to how well it Preforms is an understatement!!!!


Terry on Mar 21st 2022

This is the second unit I have purchased and it is performing very well. All functions are good and I like very much the starter battery trickle charge when all house batteries are full .

DCC30S 12V 30A DC to DC Battery Charger with MPPT

Kev Ross on Nov 17th 2020

A basic test install without the additional sense and temperature lines. With various meters set up to watch the changes in volts and current as the unit wet through all steps , soft start etc. The start battery is typical wet cel and the house battery is Lithium. The unit perform as expected with no surprises , while on solar cell only and once the house battery was full , it began checking and changing the start battery. Excellent.

Great product

Harsha Dissanayaka on Oct 19th 2020

Awesome product & looking forward to using more of these great products of yours more in my builds for different customers. Only disappointment was a very delayed postage/delivery. Apart from that great product to use . Thank you, Harsha Dissa, Director, Yakka ATS Pty Ltd Australia.