Trusted by Leading Brands A TRUE® exclusive! The True® 4th gen 4runner dual battery kit comes with all necessary mounting hardware, allowing for easy secure installation. It works with dry cells, flooded lead-acid batteries, AGMs, and hybrids. True® 4Runner battery isolator works1. Separation of Functions: Typically, one battery is used for starting the engine (the starter battery), and the other is used for powering auxiliary devices, such as lights, radios, refrigerators, and other electronic devices when the engine is off. The 4th gen 4runner dual battery kit ensures that the starter battery remains fully charged and unaffected by the drain from auxiliary devices.2. Simultaneous Charging: When the engine is running, the alternator generates electricity, which the 5th gen 4runner dual battery kit then uses to charge both batteries. However, it prioritizes the starter battery to ensure it is always fully charged and ready to start the engine. Once the starter battery is fully charged, the isolator then directs charge to the service battery.3. Prevent Battery Drain: Without a True 4runner battery isolator, using auxiliary devices could potentially drain the starter battery, leaving you unable to start the vehicle or boat. The isolator prevents this by ensuring that only the service battery is used for auxiliary power.4. Optimal Charging: True® dual battery isolator for 3rd, 4th, 5th 4runners are designed to manage different types of batteries that may have different charging needs. They ensure that each battery receives the correct charge required to maintain its health and longevity.5. Safety and Reliability: By separating the batteries and managing their charge independently, (3rd,4th,5th,SDHQ) 4runner dual battery kit improve the overall safety and reliability of the vehicle’s electrical system. This setup helps in reducing the likelihood of electrical failures and extends the life of the batteries. “I run a 2021 Chevy Silverado with dual batteries, a winch, and a sound system with a large speaker setup that hits hard. Before installing the True® Large Battery Isolator, I was always second-guessing my setup—especially during long job sites or weekend overlanding trips.This isolator changed everything. It automatically manages the charge between my starter and auxiliary batteries without me lifting a finger. No switches, no worries. I can run my gear all day and still fire up the truck without hesitation.Install was clean, and the unit feels built for real-world abuse. If you’ve got a Silverado and serious power needs, this isolator is the upgrade you didn’t know you needed—but won’t want to live without.” Austine Jones, Arizona Frequently Asked Questions 1. What is P.E.P.® (Proprietary Efficiency Programming)? P.E.P.® is TrueAm’s smart logic that optimizes battery protection and charging efficiency.It ensures the isolator only connects when safe and beneficial for both batteries 2. Does it regulate charging amps? No, the SBI doesn’t regulate amperage. That’s handled by your alternator and voltage regulator.The SBI simply controls when the second battery is connected based on voltage thresholds. 3. Why should I use this kit? Prevents your main battery from being drained by accessories. Provides dependable power for winches, lights, inverters, and other gear. Ensures your truck always has starting power available. 4. Can I manually override or shut it off? The male connector underneath can be wired for remote shutoff.Inline switches are optional but not required—SBI handles disconnection automatically. 5. How do I monitor battery status? Optional Single Meter Dual Display (SMDD) shows real-time voltage for both batteries.Saves space and simplifies monitoring 6. What vehicles can use this kit? It’s designed specifically for Chevy Silverado and GMC Sierra trucks, but can also be adapted for other GM vehicles with similar 12V systems 7. Is it compatible with all batteries? The kit works with most 12V battery types (AGM, gel, standard lead-acid). It is not recommended for lithium batteries unless specified.
