Renogy 40A DC-DC Battery Charger with MPPT
📝 Renogy 40A DC-DC Battery Charger with MPPT
Affordable, reliable, and built for high-performance — the Renogy 40A DC-DC Battery Charger with MPPT is a smart upgrade for optimising any off-grid setup. This advanced dual-input charger keeps your auxiliary battery charged wherever you go — switching seamlessly from DC alternator input while driving to solar charging when parked.
With the simple SELECT button, you can prioritise solar or DC charging on demand, making it perfect for travellers, 4WD owners, and anyone serious about off-grid reliability.
⭐ Essential Benefits
• Dual Charging Inputs – charges from both alternator and solar for uninterrupted power supply.
• MPPT Solar Regulation – maximises energy harvest from solar panels with industry-leading efficiency.
• Automatic Mode Switching – easily toggle between DC or Solar Priority for continuous charging.
• Battery Compatibility – supports LiFePO₄, Gel, Flooded, and Sealed Lead-Acid batteries.
• Comprehensive Protection – safeguards against over-voltage, over-current, overheating, and reverse polarity.
• Easy Operation – built-in lights and buttons provide quick feedback and error alerts.
• Certified Quality – meets FCC, CE, RoHS, and SAA compliance for safety and reliability.
• Long-Term Warranty – includes a 2-year manufacturer warranty for peace of mind.
⚙️ Functionality
The Renogy 40A DC-DC Charger intelligently manages charging from both your vehicle’s alternator and connected solar panels. It ensures your auxiliary battery stays topped up efficiently, automatically switching sources based on power availability.
For longer cable runs, the system recommends using a larger gauge wire to minimise voltage drop and maintain peak efficiency — ensuring consistent, reliable charging across any setup.
🔌 Compatibility
• Compatible with 12V battery systems
• Works with LiFePO₄, Gel, Flooded, and Sealed Lead-Acid batteries
• Ideal for caravans, camper trailers, 4WDs, boats, and off-grid setups
🧰 Installation Difficulty
🟡 3/5 (Moderate) – requires basic 12v wiring knowledge for alternator and solar setup, with straightforward labelled terminals for ease of use.
🔍 Features
• Dual-input design for solar and DC charging
• Built-in MPPT solar controller for optimal energy conversion
• Smart solar/DC priority selection modes
• Full electrical protection for safety and reliability
• Visual indicators for charge mode and error status
• High-efficiency charging for long-term battery health
• Rugged, compact design suitable for all off-grid applications
📊 Specifications
| Specification | Detail |
|---|---|
| System Voltage | 12V DC |
| Rated Charge Current | 40A |
| Supported Battery Types | LiFePO₄, Gel, Flooded, Sealed Lead-Acid |
| Charging Inputs | Alternator (DC) & Solar |
| Solar Input Power | Up to 520W |
| Solar Input Voltage | Up to 25V |
| Protection Features | Over-voltage, over-temp, reverse polarity, short circuit |
| Certifications | FCC, RoHS, CE, SAA |
| Warranty | 2 Years |
| Indicators | LED charge and error lights |
| Enclosure | Compact, durable, weather-resistant casing |
| Dimensions | 244 × 146 × 77 mm |
| Weight | 1.4 kg |
📦 What’s Included
• 1 × Renogy 40A DC-DC Battery Charger with MPPT
• 7 × Heat-Shrink Tubes
• 4 × Mounting Screws
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
📝 Renogy 40A DC-DC Battery Charger with MPPT
Affordable, reliable, and built for high-performance — the Renogy 40A DC-DC Battery Charger with MPPT is a smart upgrade for optimising any off-grid setup. This advanced dual-input charger keeps your auxiliary battery charged wherever you go — switching seamlessly from DC alternator input while driving to solar charging when parked.
With the simple SELECT button, you can prioritise solar or DC charging on demand, making it perfect for travellers, 4WD owners, and anyone serious about off-grid reliability.
⭐ Essential Benefits
• Dual Charging Inputs – charges from both alternator and solar for uninterrupted power supply.
• MPPT Solar Regulation – maximises energy harvest from solar panels with industry-leading efficiency.
• Automatic Mode Switching – easily toggle between DC or Solar Priority for continuous charging.
• Battery Compatibility – supports LiFePO₄, Gel, Flooded, and Sealed Lead-Acid batteries.
• Comprehensive Protection – safeguards against over-voltage, over-current, overheating, and reverse polarity.
• Easy Operation – built-in lights and buttons provide quick feedback and error alerts.
• Certified Quality – meets FCC, CE, RoHS, and SAA compliance for safety and reliability.
• Long-Term Warranty – includes a 2-year manufacturer warranty for peace of mind.
⚙️ Functionality
The Renogy 40A DC-DC Charger intelligently manages charging from both your vehicle’s alternator and connected solar panels. It ensures your auxiliary battery stays topped up efficiently, automatically switching sources based on power availability.
For longer cable runs, the system recommends using a larger gauge wire to minimise voltage drop and maintain peak efficiency — ensuring consistent, reliable charging across any setup.
🔌 Compatibility
• Compatible with 12V battery systems
• Works with LiFePO₄, Gel, Flooded, and Sealed Lead-Acid batteries
• Ideal for caravans, camper trailers, 4WDs, boats, and off-grid setups
🧰 Installation Difficulty
🟡 3/5 (Moderate) – requires basic 12v wiring knowledge for alternator and solar setup, with straightforward labelled terminals for ease of use.
🔍 Features
• Dual-input design for solar and DC charging
• Built-in MPPT solar controller for optimal energy conversion
• Smart solar/DC priority selection modes
• Full electrical protection for safety and reliability
• Visual indicators for charge mode and error status
• High-efficiency charging for long-term battery health
• Rugged, compact design suitable for all off-grid applications
📊 Specifications
| Specification | Detail |
|---|---|
| System Voltage | 12V DC |
| Rated Charge Current | 40A |
| Supported Battery Types | LiFePO₄, Gel, Flooded, Sealed Lead-Acid |
| Charging Inputs | Alternator (DC) & Solar |
| Solar Input Power | Up to 520W |
| Solar Input Voltage | Up to 25V |
| Protection Features | Over-voltage, over-temp, reverse polarity, short circuit |
| Certifications | FCC, RoHS, CE, SAA |
| Warranty | 2 Years |
| Indicators | LED charge and error lights |
| Enclosure | Compact, durable, weather-resistant casing |
| Dimensions | 244 × 146 × 77 mm |
| Weight | 1.4 kg |
📦 What’s Included
• 1 × Renogy 40A DC-DC Battery Charger with MPPT
• 7 × Heat-Shrink Tubes
• 4 × Mounting Screws
