Voltage Sensitive Split Charge Systems vs. DC to DC Charge Systems
If you own a motorhome, campervan, or boat, you know that having a reliable power source is essential.
One way to ensure that you have a reliable power source is to install a split charging system. A split charging system allows you to connect the vehicle (starter) battery to one or more leisure batteries for powering your auxiliary, or ‘domestic’ devices.
There are two main types of split charging systems: voltage sensitive split charge systems and DC to DC charge systems.
Voltage Sensitive Split Charge Systems
A voltage sensitive split charge system (VSR) is a simple and inexpensive way to split charge batteries. A VSR works by sensing the voltage of the batteries and connecting or disconnecting them as needed. When the voltage of the starter battery reaches a certain threshold, the VSR will connect the additional leisure batteries, allowing the alternator to charge to pass through and charge the leisure batteries. When the voltage of the starter battery drops below a certain threshold, the VSR will disconnect the leisure batteries, preventing the auxiliary battery from being overcharged.
VSRs are easy to install and require no modifications to your vehicle’s electrical system. However, VSRs have a few limitations. First, VSRs are not as efficient as DC to DC charge systems. This is because VSRs simply connect the batteries together, allowing the alternator to charge them at the same rate. DC to DC charge systems, on the other hand, can charge batteries at different rates, which can help to extend the life of your batteries. Secondly, VSRs are incompatible with many modern vehicles that utilise smart alternators.
DC to DC (DC-DC) Charge Systems
A DC to DC charge system is a more sophisticated type of split charging system. By using a microprocessor to control the charging process, the charger monitors the voltage and current of both the starter battery and leisure batteries, adjusting the charging rate accordingly. This ensures that all batteries are charged efficiently and that they do not overcharge.
DC to DC charge systems are generally more expensive than VSRs, but they offer several advantages. First, DC to DC charge systems can charge batteries at different rates. This can help to extend the life of your batteries. Second, DC to DC charge systems are more efficient than VSRs. This means that they can charge your batteries faster and with less heat. Third, DC to DC charge systems can be used to charge a wide variety of batteries, including lead-acid, lithium, and AGM batteries.
Which System is Right for You?
The best split charging system for you will depend on your needs and budget. If you are looking for a simple and inexpensive system, a VSR may be a good option for you. However, if you want a more efficient system that can charge a variety of batteries, a DC to DC charge system will be a better choice.
Here is a table that summarises the pros and cons of each type of system:
Feature VSR Charge System DC-DC Charge System
Cost Inexpensive Expensive
Installation Easy More difficult
Charging speed Slow Fast
Battery protection No Yes
Performance Good Excellent
Conclusion
Ultimately, the best way to decide which system is right for you is to consult with a professional installer. They can help you assess your needs and recommend the best system for your specific application. Please contact us and we’d be delighted to help.