Here are some common questions people ask about dual battery isolators, especially for vehicles like UTVs, RVs, and off-road setups:
1. What is a dual battery isolator and how does it work?
A dual battery isolator is a device used in vehicles with multiple batteries to prevent the primary battery from draining while allowing the secondary battery to charge. It ensures that the starter battery remains fully charged and ready to start the engine, while the auxiliary battery powers accessories like lights, radios, or winches. It charges both batteries when the engine is running and isolates them when it’s off.
How Battery Isolator Works?
- Battery Separation: This smart isolator automatically cuts off power between your main battery and secondary battery when the engine isn’t running, protecting both from draining.
- Charging Process: While driving, your alternator powers both batteries. The smart isolator makes sure your main battery charges first, then safely directs power to your auxiliary battery when it’s ready.
- Automatic Switching: When you turn off your engine, the isolator automatically cuts off the extra battery. This keeps your main battery fully charged so your vehicle starts up every time.
- Protection Against Overcharging: Some advanced isolators include voltage-sensitive relays (VSR) that regulate charging and prevent overcharging of the auxiliary battery.
2. Do I really need a dual battery isolator?
Yes, if you use a winch, sound system, fridge, or lights that draw a lot of power while the engine is off. It ensures your starter battery is always ready.
3. What’s the difference between a smart isolator and a manual one?
Smart isolators automatically detect voltage and manage charging, while manual ones require switches or solenoids to operate. The Smart Isolator automatically manages battery charging via voltage sensors—ideal for hands-free operation. Manual Isolator requires user switching; cheaper but less convenient. Smart versions protect batteries better.
4. Can a dual battery isolator drain my battery?
No, when working properly, an isolator prevents your main battery from draining by separating the two batteries when the vehicle is off. a faulty or incorrectly installed isolator can cause discharge, leading to potential battery depletion over time.
5. What is the simple test if your Smart Battery Isolator is working or set up properly?
To test if your True® Smart Battery Isolator is working correctly, follow these steps:
- Start Your Vehicle – Once the engine is running, the electrical system should reach 13.4 volts or higher, triggering the isolator to illuminate, indicating that both batteries are connected and charging.
- Turn Off the Engine – The isolator should disconnect when the voltage drops to 12.9 volts or below, turning off the blue LED.
- Verify with Accessories – If the isolator remains engaged, turn on accessories (like headlights) for a few minutes to bring the battery to its resting level, allowing the isolator to disengage
6. Will it affect my alternator or charging system?
A dual battery isolator generally does not harm your alternator or charging system when installed correctly. In fact, it helps manage power distribution efficiently. However, potential issues can arise if:
- The isolator is not rated for your alternator’s output, leading to overloading.
- Poor wiring or incorrect installation causes voltage drops or charging inefficiencies.
- Some older isolators may increase resistance, slightly affecting charging speed.
A True® smart isolator is often preferred because it optimizes charging and reduces strain on the system
7. Do I need special batteries for an isolator system?
Not necessarily, but both batteries must be in good condition. Lithium batteries may need a specialized lithium battery isolator kit by True® to align with their specific charging requirements.
8. Can I install it myself, or do I need a professional?
If you’re familiar with basic wiring and have instructions, the True® smart isolator is DIY-friendly. Installing a True® dual battery isolator is a straightforward and reliable process with the help of printed wiring diagram and online videos, designed to make managing multiple batteries hassle-free.
Otherwise, it’s safer to consult a pro. or contact our expert service.
For more inquiries, please visit our FAQ’s page.
