Professional DC-DC battery charger for 12 V systems
This modern, 30 A galvanically isolated DC-DC battery charger is the ideal solution for safely and efficiently charging onboard batteries in vehicles, motorhomes, boats, and solar systems. It reliably charges the secondary (consumer) battery from the starter battery or another 12 V source while protecting the system from overload and voltage fluctuations.
Isolated DC-DC charging for maximum safety
The galvanically isolated DC-DC charger prevents ground loops, reduces electrical noise, and protects the sensitive circuits of onboard electronics. It is particularly recommended for systems where multiple battery banks, different chargers, and sensitive control electronics operate together.
- Complete galvanic isolation between input and output
- Safe connection between separate battery circuits
- Reduced risk of ground loop and interference formation
- Longer lifespan for batteries and onboard devices
Smartphone control via Bluetooth connection
Thanks to the built-in Bluetooth module, the charger can be easily monitored and configured from a smartphone or tablet. With the VictronConnect app, you can get detailed information about the charging process, voltages, currents, and easily modify the settings.
- Real-time charging data display
- Charging profiles customizable for different battery types
- Immediate display of error codes and alerts
- Wireless installation of firmware updates
Intelligent, multi-stage charging algorithm
The device uses an advanced, multi-stage (bulk, absorption, float) charging algorithm for gentle and complete charging of the battery. The appropriate charging curve helps prevent over- or under-charging, significantly increasing the battery's lifespan.
- Bulk phase: Charging with maximum current for rapid capacity recovery.
- Absorption phase: Voltage-limited charging for cell balancing.
- Float phase: Maintenance charging to compensate for self-discharge.
The charger is suitable for charging various battery technologies, such as AGM, gel, lead-acid, and lithium (LiFePO4) batteries, with the appropriate settings.
Stable 30 A charging current for demanding systems
The rated 30 A output current provides sufficient reserve for higher consumption onboard systems. It is an ideal choice for motorhomes, 4x4 vehicles, boats, construction machines, and off-grid systems where multiple consumers (refrigerator, inverter, lighting, communication devices, etc.) operate from the secondary battery.
- High 30 A output current for fast battery charging
- Reliable operation even in extreme conditions
- Compact size, easy integration in tight spaces
- Low constant consumption and high efficiency
Protection of the starter battery and engine run detection
The DC-DC charger is designed not to overload the starter battery. Thanks to the engine run detection and programmable input voltage threshold values, it only charges when the generator or main power source provides sufficient reserve.
- Programmable input voltage switching points
- Protection against draining the starter battery
- Compatible with traditional and intelligent (smart) generators
- Suitable for Euro 5 / Euro 6 vehicles as well
Safety features and protection
The charger has numerous built-in safety features that protect the device, the battery, and the entire electrical system. These features are particularly important in mobile and off-grid applications, where operational reliability is a primary concern.
- Overheating protection and temperature compensation
- Short circuit, overload, and overcurrent protection
- Reverse polarity protection (with proper fusing)
- Automatic restart in fault-free condition
Flexible installation and integration
The 12 V–12 V isolated DC-DC charger can be easily integrated into existing electrical systems, whether in a motorhome, boat, trailer, or solar energy storage. The screw connectors and clear labeling make installation easy for both professionals and knowledgeable users.
- Wide input voltage range for different power sources
- Possibility of parallel connection for higher current (as recommended by the manufacturer)
- Compatible with solar systems and inverters
- Easy maintenance, diagnostics via Bluetooth
Applications
The 30 A isolated DC-DC battery charger is versatile for any situation where reliable 12 V power supply and safe battery charging are needed.
- Charging secondary batteries in motorhomes, camper vehicles
- Charging onboard batteries in boats and yachts from a generator
- Dual battery systems in off-road, 4x4, and expedition vehicles
- Optimizing battery charging in solar systems from an auxiliary source
- Power supply for construction machines, service vehicles, mobile workshops
Why use a smart DC-DC battery charger?
A modern, smart DC-DC battery charger offers significant advantages over traditional voltage divider relays. It not only connects batteries but also provides regulated charging, taking into account the battery type and operating conditions.
- Longer battery life due to precise charging
- Reliable power supply for larger consumers
- Detailed monitoring and logging via Bluetooth
- Better compatibility with modern, variable voltage generators
Summary
This 12 V, 30 A isolated DC-DC battery charger is the ideal choice for any user who wants to charge their onboard batteries safely, efficiently, and intelligently from an existing 12 V power source. The advanced charging algorithm, Bluetooth monitoring, galvanic isolation, and versatile protection features together ensure reliable operation and a long-term return on investment in any vehicle or solar power supply system.
