Spilt Charge Relays & Kits
Split charge relays are a cornerstone of electrical system design in campervans and motorhomes, ensuring that multiple batteries are charged efficiently while preventing drainage of the vehicle's starter battery. This technology allows for the separation and management of different battery banks, typically one for starting the engine and another (or more) for powering appliances and amenities within the living space. This article explores the functionality, benefits, and key considerations of using split charge relays in campervans and motorhomes.
What is a Split Charge Relay?
A split charge relay is an electrical device that automatically manages the charging process between a vehicle's starter battery and its leisure battery (or batteries). When the engine is running, and the starter battery is fully charged, the relay activates to allow charging of the leisure battery from the alternator. This ensures that the leisure battery is charged without compromising the starter battery's ability to start the engine.
Benefits of Split Charge Relays
Optimized Battery Management: The primary advantage of a split charge relay is its ability to ensure that the leisure battery is charged while the engine is running, without risking the depletion of the starter battery. This setup is crucial for campervans and motorhomes, where electrical demands for living comforts can be significant.
Simple and Efficient: Split charge relays are favored for their simplicity and efficiency. They are easy to install and operate automatically once set up, requiring minimal maintenance or manual intervention.
Cost-Effective: Compared to more complex battery charging systems, split charge relays offer a cost-effective solution for managing dual battery systems in vehicles.
Safety: By isolating the starter battery when the engine is off, split charge relays prevent accidental battery drainage, ensuring the vehicle can always be started. This adds an important safety layer, especially in remote locations.
10 Products Found
£45.95
Cyrix-ct 12/24V-120A Intelligent Battery Combiner
Efficient Power Management with Victron Cyrix-ct 12/24V-120A Intelligent Battery Combiner
Maximize your energy solutions with the Victron Cyrix-ct 12/24V-120A Intelligent Battery Combiner, a state-of-the-art device designed for seamless battery management. Ideal for marine, RV, and off-grid applications, this robust battery combiner ensures optimal performance and reliability.
Key Features:
Intelligent Voltage Sensing: Automatically detects voltage levels, ensuring efficient charging and discharging between multiple battery banks.
High Current Capacity: With a 120A continuous current rating, it effortlessly handles the demands of most electrical systems.
Dual Voltage Compatibility: Perfectly suited for both 12V and 24V systems, making it a versatile choice for various setups.
Priority Charging Feature: Prioritizes the charging of your main battery, ensuring critical operations are always powered.
Bi-directional Charging: Allows for charging in both directions, enhancing the flexibility and efficiency of your power system.
Overload Protection: Integrated protection mechanisms safeguard against overcurrent and short circuits, ensuring longevity and safety.
Compact and Durable Design: Engineered for the toughest conditions, it's compact enough to fit in tight spaces and durable enough to withstand harsh environments.
Benefits:
Enhanced Battery Life: By intelligently managing the charge, it extends the life of your batteries.
Energy Efficiency: Reduces energy waste, ensuring you get the most out of your power sources.
Easy Installation: Simple setup process makes it accessible even for those with basic technical knowledge.
Versatility: Ideal for a wide range of applications, from boats and RVs to renewable energy systems.
Why Choose Victron Cyrix-ct 12/24V-120A?
The Victron Cyrix-ct is more than just a battery combiner; it's a smart investment in your energy system. Its intelligent features and robust design make it a top choice for professionals and enthusiasts alike who demand reliability and efficiency. Whether you're sailing the seas, exploring the open road, or harnessing renewable energy, the Victron Cyrix-ct is your trusted partner in power management.
Cyrix Battery Combiners: A Closer Look
Cyrix Battery Combiners are a revolutionary solution in the realm of battery management. These devices are designed to maximize the efficiency and reliability of your battery systems, making them an ideal choice for a variety of applications.
Understanding the Technology
At the heart of Cyrix Battery Combiners is a microprocessor-controlled heavy-duty relay. This advanced technology ensures minimal voltage loss, a common issue with traditional diode isolators. By optimizing battery charging and discharging, Cyrix Battery Combiners maintain the health and longevity of your batteries.
Functionality and Benefits
One of the key functionalities of Cyrix Battery Combiners is their ability to automatically connect batteries in parallel during charging and disconnect them when the voltage drops below a certain level. This feature not only enhances the efficiency of your battery system but also its reliability.
Diverse Applications
Whether you're dealing with automotive, marine, off-grid, backup, or island systems, Cyrix Battery Combiners are up to the task. Their compatibility with various alternators and battery chargers makes them a versatile component in any power management setup.
Easy Installation and Maintenance
Installing and maintaining your Cyrix Battery Combiner is straightforward. The step-by-step guide ensures a hassle-free setup, and the tips provided help in maintaining optimal performance. In case of any issues, the troubleshooting section offers practical solutions.
Conclusion
In conclusion, Cyrix Battery Combiners are an essential component for anyone looking to enhance the efficiency and reliability of their battery systems. With their advanced technology and wide range of applications, they are a smart investment for both short-term performance and long-term battery health.
Cyrix-ct Datasheet
Cyrix-ct 12/24V-120A Intelligent Battery Combiner Datasheet
Cyrix Wiring Diagram
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£21.99
Sinolec Professional 12V 140A Split Charge Voltage Sensitive Relay - VSR
Sinolec Professional 12V 140A Split Charge Voltage Sensitive Relay - VSR - EU Certified
Voltage Sensitive Relay / 140A 12Vdc (125A Continuous) / Voltage Range 12.8V to 13.3V / 10mA Standby Power Drain / Built in LED / RoHS, CE / JH-VSR2008.
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£35.19
Sterling Split Charge Diode - 70A 1 in 2 out
Sterling has developed a range of low cost split charge diodes. These diodes have enhanced performance over conventional diodes and at a lower cost. The difference is in the devices. All other split charge diode manufacturers use conventional alternator diodes, which at low current flow have about a 0.93 voltage drop. When the full rated current of these diodes is approached, the voltage drop increases to about 0.95 volts. Specification: Alt Input: 1 Battery Banks: 2 Output: 70A For cable information for all Sterling Products click here
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£72.50
VICTRON ENERGY CYRIX-LI-CT 12/24V 120A INTELLIGENT LI-ION BATTERY COMBINER – CYR010120412
The functionality of the Cyrix-Li-ct is analogous to the Cyrix-ct.
The Cyrix-Li-ct will parallel connect a lead acid starter battery and a LiFePO4 battery:
if the Charge Disconnect output of the VE.Bus BMS is high, and
if it senses 13,4V (resp. 26,8V) or more on one of its power terminals
The Cyrix will disengage immediately:
when its control output becomes free floating, signalling cell over voltage or cell over temperature, and/or
when battery voltage drops below 13,2V. Start assist function: a short positive pulse will close the relay during 30 seconds
A built-in transient voltage suppressor will limit the voltage spike that may occur when the Cyrix suddenly disengages due to cell overvoltage or over temperature.
Brand
Victron Energy
Manufacturer Part Number
CYR010120412
Voltage
12/24
Continuous current & Breaking capacity at 12V or 24V
120A
Current Consumption When Open
4 mA
Protection Category
IP54
Dimensions
H46 x W46 x D80mm
Weight (kg)
0.11
Warranty
5 Years
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£124.99
VSR Kit - Victron Cyrix-Ct 120A kit with all required components
This voltage-sensitive relay kit comes complete with all the necessary components to integrate the Victron Cyrix-ct 120A into your campervan or motorhome's electrical setup. The kit comprises:
Victron Cyrix-ct 120A battery combiner
2 x 150A MEGA fuses
2 x Victron MEGA fuse holders
Red and black cables - 50mm2 for lengths up to 8m
6mm Control Cables
Cable lugs for connections to the starter battery and leisure battery
Cyrix-ct 120A Battery Combiner
The Cyrix-ct 120A functions as a voltage-sensitive relay, automatically linking your leisure and starter batteries when a specific charge voltage is reached, and separating them when the voltage drops below the float level, indicating discharge. This model is capable of charging a leisure battery at up to 120A/hr. For additional details, refer to our split charge relay explanation.
IMPORTANT: The Cyrix-ct battery combiner, a voltage-sensitive relay, is not suitable for vehicles with Euro 5 or Euro 6 engines that utilize a smart alternator. Most vehicles registered post-September 2013 fall under Euro 5 or 6, which you can verify with your V5C document. In such cases, a battery-to-battery charger is recommended.
Applications
A voltage-sensitive relay (VSR) is only viable in vehicles without Euro 5 or Euro 6 engines and with lead-acid (not lithium) leisure batteries.
Intelligent Battery Monitoring
Unlike basic relays, the Cyrix-ct 120A employs advanced software to monitor battery voltage trends over time, connecting or disconnecting batteries not just on immediate voltage levels but also considering the direction of voltage change with a specific time delay. This method prevents disconnection during short, high-amperage loads and ensures connectivity with large, discharged battery banks without immediate disengagement due to voltage drop.
Overheating Protection
The Cyrix disengages in the event of excessive contact temperature and will reengage once it cools down, providing an additional layer of protection for your system.
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£174.99
Sterling Pro Split R 12V 120A 2 Out Split Isolator
The ProSplit R is an advanced split charge management device, developed specifically to deal with the complex nature of modern multi battery systems in boats and vehicles. For single or dual alternator inputs to two, three or four battery bank installations. Complex software with some 1000 lines of code analyses every perceivable condition to ensure charging priorities are managed as you want with specific focus on preserving charge in the engine starter battery. Each input & output terminal is independently monitored to establish status before deciding where charge will be delivered and to prevent discharge from one battery to another. Truly zero voltage drop is one key feature of the Pro Split R. Many alternative products claim to have no voltage loss but, under test, are proven not to be so - especially with heavy loads - when it really matters. It may not seem significant but 1V drop equates to as much as 30% lost charging power in a 12V system. ? Unlike conventional Voltage Sensitive Relays (VSRs), the ProSplit R has the ability to identify and reverse current or over-voltage conditions and disconnect individual batteries to avoid damage or discharge. The ignition sense connection also ensures that the device knows the engine is running and protects the start battery when the engine is off ? Specification: Alt Volts: 12 Max Alt Amps: 12 Output Battery Bank: 2 out Unit Size (mm): 150 x 80 x 120 Unit Weight: 0.6 For cable information for all Sterling Products click here
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£50.71
Sterling Split Charge Diode - 90A 1 in 2 out
Sterling has developed a range of low cost split charge diodes. These diodes have enhanced performance over conventional diodes and at a lower cost. The difference is in the devices. All other split charge diode manufacturers use conventional alternator diodes, which at low current flow have about a 0.93 voltage drop. When the full rated current of these diodes is approached, the voltage drop increases to about 0.95 volts. Specification: Alt Input: 1 Battery Banks: 2 Output: 90A For cable information for all Sterling Products click here
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£89.99
Victron Energy CYRIX-CT 12/24V 120A Battery Combiner Kit – CYR010120110R
This Battery Combiner Kit is for adding a 2nd or 3rd battery system in your car, boat, RV or whatever you wish. It utilizes the simplest and most advanced technology to keep all your batteries charged using the engines electrical system, but isolates the starting battery when charging ceases so you never get stranded. This kit includes the Battery Combiner, cables and lugs.
Brand
Victron Energy
Manufacturer Part Number
CYR010120110R
Voltage
12/24
LED Status Indication
No
Continuous Current
120 A
Cranking Rating (5 seconds)
180 A
Start Assist
Yes (Cyrix remains engaged during 30 seconds)
Protection Category
IP54
Dimensions
H46 x W46 x D80
Weight (kg)
0.11
Warranty
5 Years
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£193.86
Sterling Pro Split R 12V 120A 3 Out Split Isolator
The ProSplit R is an advanced split charge management device, developed specifically to deal with the complex nature of modern multi battery systems in boats and vehicles. For single or dual alternator inputs to two, three or four battery bank installations. Complex software with some 1000 lines of code analyses every perceivable condition to ensure charging priorities are managed as you want with specific focus on preserving charge in the engine starter battery. Each input & output terminal is independently monitored to establish status before deciding where charge will be delivered and to prevent discharge from one battery to another. Truly zero voltage drop is one key feature of the Pro Split R. Many alternative products claim to have no voltage loss but, under test, are proven not to be so - especially with heavy loads - when it really matters. It may not seem significant but 1V drop equates to as much as 30% lost charging power in a 12V system. ? Unlike conventional Voltage Sensitive Relays (VSRs), the ProSplit R has the ability to identify and reverse current or over-voltage conditions and disconnect individual batteries to avoid damage or discharge. The ignition sense connection also ensures that the device knows the engine is running and protects the start battery when the engine is off. ? Specification: Alt Volts: 12 Max Alt Amps: 120 Output Battery Bank: 3 out Unit Size (mm): 150 x 80 x 130 Unit Weight (kg): 0.9 For cable information for all Sterling Products click here
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£124.99
Cyrix-ct 12/24V-230A Intelligent Battery Combiner
The Cyrix Battery Combiner is a microprocessor controlled heavy duty relay that automatically connects batteries in parallel when one of them has reached a pre-set voltage (indicating that the battery is being charged), and disconnects when the voltage decreases below float level (indicating that one or more batteries are being discharged).
Cyrix Battery Combiners are an excellent replacement for diode isolators. The main feature is that there is virtually no voltage loss so that the output voltage of alternators or battery chargers does not need to be increased.
Specifications:
Continuous current: 230A
Cranking current (5 secs): 500A
Standby consumption: <4mA
Rated voltage: 12V / 24V
Terminal size: 8mm
Dimensions: 65 x 100 x 50 mm
Weight: 270g
Cyrix-ct Datasheet
Cyrix-ct 12/24V-230A Intelligent Battery Combiner Datasheet
Cyrix Wiring Diagram
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