True® Heavy Duty Dual Battery Isolator for Ford 150, GMC Sierra, Silverado, Toyota 4Runner, Tundra – All Trucks, RVs and Fishing Boat

4,300.00

  • 12V 140A  Heavy-duty dual battery isolators for your truck, SUV, cars, and even fishing boat
  • Used to managed battery charging system to keep you fully loaded while on travel
  • Separates primary from Auxillary battery and automatically charge when the voltage goes down
  • Average of 3 years lifespan,  full year warranty and technical support online
  • Belong to top 5 dual battery isolators from USA
  • Manufacture by True Technology and distributed by Dfna – the official retailer of True

 

SKU: TrueSBIDBK Category:

Kit Composition

  •  True® Smart Battery Isolator for all automotive models and fishing boat that rely on dual battery setup
  •  1 (SBI) Smart Battery Isolator install kit with mounting screws
  •  20 feet #6 high flex red cable with tinned copper cable lugs
  •  3 feet #6 high flex black cable with tinned copper cable lugs
  •  2 positive brass alloy battery terminal ends
  •  1 negative brass alloy battery terminal end
  •  3 loose crimp-on tinned copper cable lugs
  •  2 sections of adhesive lined shrink tube
  •  5 zip ties
  •  1 – 2nd battery kit installation booklet
  • 12v dual battery wiring kit diagram included
  • Official retailer of True® dual battery relay kit
  • Delivery: USPS first class or priority mail

 


 

Why you should have dual battery setup with automatic isolator?

 

Advantages of  True® Heavy Duty Dual Battery Isolator Kit, designed for rugged automotive, marine, and off-road applications:

? Smart Dual Voltage Management System

  • 140A Voltage-Sensitive Relay (VSR): Automatically prioritizes charging the starter battery and engages the auxiliary battery once voltage reaches 13.3V.
  • Dual Sensing Technology: Detects charge from either battery—if one is being charged (e.g., via solar or shore power), both batteries receive charge.
  • Automatic Separation: When voltage drops below 12.8V, the the True smart battery isolator disengages to prevent draining the starter battery.

⚙️ Heavy-Duty Build

  • Waterproof & Shockproof Casing: Withstands harsh environments, including heat up to 130°C.
  • Heat-Resistant Cables: Includes high-flex #6 gauge red and black cables with tinned copper lugs for secure, corrosion-resistant connections.
  • Brass Alloy Terminals: Durable and conductive for long-term reliability.

? DIY-Friendly Installation

  • Complete Kit: Comes with mounting screws, shrink tubing, zip ties, and a detailed wiring diagram for easy setup.
  • No Factory Wire Cutting: Preserves vehicle warranty by avoiding alternator wire rerouting.

? Versatile Applications

  • Ideal for trucks, RVs, boats, SUVs, and campers—especially useful for powering winches, lights, fridges, and sound systems without risking a dead starter battery.

This isolator is a favorite among overlanders, boaters, and off-roaders who need reliable power distribution for extended trips. Want help comparing it with other isolators or integrating it into your setup?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Description

 

🔋 Power Management & Performance

  1. PEP® Technology – Optimizes performance for stator charging systems.
  2. Voltage-Sensitive Relay (VSR) – Engages at 13.4V and disengages at 12.9V to protect the starter battery.
  3. Dual Sensing – Charges both batteries from either source (solar, alternator, etc.).
  4. Zero Voltage Drop – Maintains full power flow between batteries.
  5. Automatic Isolation – Prevents accessory drain from affecting the starter battery.
  6. Surge Protection – Shields electronics from ignition spikes.

⚙️ Build Quality & Durability

  1. 140A Continuous Current Rating – Handles high-demand accessories with ease.
  2. 170A Intermittent Current Rating – Supports short bursts of heavy load.
  3. Waterproof Housing – Built to withstand rain, mud, and splashes.
  4. Shockproof Design – Resists vibration and rough terrain.
  5. Heat Resistance – Operates safely up to 130°C.
  6. Brass Alloy Terminals – Durable and corrosion-resistant.

🧰 Installation & Compatibility

  1. Plug-and-Play Setup – No alternator wire cutting required.
  2. Compact Size – Fits tight spaces (2.7″ x 2.7″ x 1.95″).
  3. LED Indicator – Blue light shows when batteries are connected.
  4. 3M Dual Lock™ Mounting – Flexible install options: fixed or suspended.
  5. No Fuse Required – Built-in protection simplifies wiring.
  6. Works with All 12V Systems – Compatible with most vehicles and battery types (except lithium).

🇺🇸 Brand & Support

  1. Made in the USA – Manufactured by True Amalgamated, known for quality.
  2. Trusted by Off-Roaders – Proven in harsh environments and long expeditions.

If you’re running winches, fridges, lights, or sound systems, this isolator is a powerhouse.

 

 

 

 

 

 

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