Intelligent battery charge separator relay for 24/48V systems, with 120A load capacity
This advanced, microprocessor-controlled charge separator relay is specifically designed for lithium battery systems, for networks with nominal voltages of 24V and 48V. An ideal solution for boats, motorhomes, industrial power supply systems, and off-grid solar installations where safe, automated battery charging and reliable separation of power sources are important.
Main features and benefits
- Compatible with 24V and 48V DC systems
- Up to 120A continuous current capacity
- Automatic battery protection for lithium cells (with BMS support)
- Intelligent charge separation between generator, charger, and battery
- Safe switching with overload and overvoltage monitoring
- Low-loss, high-efficiency relay technology
- Simple wiring with logical connection points
- Reliable operation in mobile and fixed installation systems
How does intelligent charge separation work?
The relay's task is to monitor the signals from the battery management system (BMS) and automatically connect or disconnect the generator, charger, and battery bank based on these signals. When the BMS allows charging, the relay closes and enables the optimal charging current to pass through. If the BMS stops charging due to overcharging, overheating, or other protective reasons, the relay immediately disconnects the load or power source, preventing damage to the battery.
Thanks to the intelligent control, the system operates fully automatically, requiring no manual intervention. This is particularly important for lithium energy storage systems, where precise voltage and temperature control of the cells is essential for long lifespan.
Who is it recommended for?
- Boat owners equipped with lithium batteries (sailing, motor boats, yachts)
- Motorhome, caravan, and camping vehicle owners
- Operators of off-grid solar systems
- Owners of industrial uninterruptible power supplies, mobile power supply systems
- Applications where safe separation of generator and batteries is crucial
Why is a charge separator relay important for lithium batteries?
Lithium technology energy storage systems are more sensitive to overcharging and deep discharging than traditional lead-acid batteries. Therefore, built-in or external BMS systems are often used, which continuously monitor the state of the cells. This intelligent relay can receive control signals from the BMS and switch the charging circuits accordingly.
The main advantages of the solution include:
- Prevents overcharging and harmful voltage spikes
- Protects the generator from overload when the lithium battery would draw high current
- Ensures longer battery life
- Minimizes maintenance needs and potential failures
Typical application examples
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Marine application
The auxiliary battery consists of lithium cells, while the boat motor's generator charges the onboard system. The relay decides based on the BMS signals when to allow the connection between the generator and the battery, thus protecting both the generator and the energy storage.
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Motorhome and camping systems
The vehicle's starter battery and the living space's lithium battery bank remain safely separated, but the generator properly charges the living space batteries while driving. The relay prevents the living space load from draining the starter battery.
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Solar off-grid systems
The solar inverter, grid charger, and generator can all be used as charging sources. The relay ensures that the lithium battery is only connected to the charging source when the BMS deems it safe.
Main technical specifications
- Nominal system voltage: 24V / 48V DC
- Maximum continuous current: 120A
- Intelligent control based on BMS signal
- Low standby consumption, high efficiency
- Safe relay technology optimized for arc protection
- Mechanically stable, vibration-resistant design for mobile applications
Simple installation and system integration
The relay's design allows for quick, clear wiring. The connection points are logically arranged, making it easy to identify which terminal belongs to the generator, the charging source, and the battery. After connecting the BMS control signal, the system operates fully automatically, requiring no further adjustments.
The charge control relay integrates particularly well with solar charge controllers, grid chargers, and DC-DC chargers, making it an ideal central component of any modern lithium energy storage system.
SEO relevant keywords
- intelligent charge separator relay for lithium batteries
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- 120A high current battery relay
- battery protection for BMS systems
- safe separation of generator and battery
- optimization of lithium battery charging
Summary
This intelligent charge separator relay is a reliable, safe, and efficient solution for any 24V or 48V lithium battery system where professional control of the generator, charging sources, and energy storage is important. It helps protect the battery and the entire energy supply system while being easy to install and ensuring stable long-term operation.
