Renogy 40A DC-DC Battery Charger with MPPT
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Need Fast and Reliable Off-Grid Charging? The Renogy 40A DC-DC Battery Charger with MPPT Keeps Your Batteries Powered Wherever You Go
If you're looking for a reliable way to keep your auxiliary batteries charged while travelling, the Renogy 40A DC-DC Battery Charger with MPPT is built to make off-grid power easier. Whether you're heading away in a caravan, camper trailer, 4WD or motorhome, this charger helps ensure your batteries stay charged and ready to power your essential equipment.
The 40A DC-DC Battery Charger with MPPT combines alternator charging and solar charging into one smart unit. While you're driving, it uses power from your vehicle's alternator to charge your auxiliary battery. When solar panels are connected, the integrated MPPT technology works to maximise the energy collected from the sun, helping you get more out of your solar setup.
With a powerful 40A charging capacity, this charger is ideal for larger battery banks and users with higher energy demands. It delivers efficient multi-stage charging that helps maintain battery health, improve charging performance and extend the overall lifespan of your batteries. This means less time worrying about power and more time enjoying your adventure.
The built-in MPPT solar controller continuously monitors solar input and adjusts to find the optimal charging point. This allows the system to capture more usable energy, even when weather conditions or sunlight levels change throughout the day. The result is faster and more efficient charging compared to traditional solar regulators.
Designed for tough Australian conditions, the Renogy 40A DC-DC Battery Charger with MPPT offers dependable performance wherever your travels take you. Whether you're powering a fridge, lighting, communication devices or other off-grid essentials, this charger provides a simple and effective solution for keeping your batteries charged and your power system running smoothly.

Package Contents
- Battery Charger x 1
- Heat-shrink tubings x 7
- Mounting Screws x 4

Renogy 40A DC-DC Battery Charger with MPPT Specifications
| Output Voltage | 0-16V |
| Solar Input Voltage Range | 12V -30V |
| DC Input Voltage Range | 11.2V-24V |
| Alternator Input | Traditional Alternator: 13.2-16.0VDC Smart Alternator (Euro 6): 12-16.0VDC |
| Maximum Output Current Rating | 40A |
| Output Power | 584W |
| Battery Types | AGM, Gel, Flooded, Lithium-iron Phosphate |
| Input Fuse Rating | 60A |
| Output Fuse Rating | 50A |
| Charging Efficiency | ≥93% |
| Idle Power Consumption | <10 mA |
| Model | RBC40D1S |
| Terminal Size | / |
| Grounding | Common Negative |
| Communication | / |
| Operating Temperature | -4℉ -113℉ /-20 ℃ - 45℃ |
| Storage Temperature | -4℉ -140℉ /-20 ℃ - 60℃ |
| Humidity | 0%~95% RH |
| Cooling | Heat Sink |
| Enclosure Rating | IP31 |
| Dimensions (LxWxH) | 1.2 kg /2.65 lb |
| Weight | 1.2 kg /2.65 lb |
| Regulatory and Safety Specifications | FCC Path 15, Class B,CE,RoHS,SAA |
