The True® Auxiliary Battery Isolator Kit is widely considered one of the best options for dual battery management, and here’s why it stands out compared to other brands:
⚡ Intelligent Design
- Automatic Voltage Sensing: The True isolator engages when your system reaches charging voltage (around 13.4V) and disconnects when it drops (around 12.9V). This ensures efficient charging without manual intervention.
- Starter Battery Protection: It prioritizes your main battery, so you’ll never be stranded with a dead starter after running accessories.
🛠️ Heavy‑Duty Build
- Marine‑Grade & Off‑Road Ready: Built with corrosion‑resistant materials, waterproof housing, and heat resistance up to 130°C.
- Compact & Durable: Small enough to fit tight spaces, yet rugged enough to handle vibration, mud, saltwater, and extreme conditions.
🔋 Versatility
- Works across a wide range of vehicles: trucks, SUVs, boats, RVs, ATVs, and off‑road rigs.
- Compatible with most 12V lead‑acid and AGM batteries, making it flexible for different setups.
✅ Ease of Use
- Plug‑and‑Play Installation: Comes with clear instructions, wiring diagrams, and all necessary hardware.
- Maintenance‑Free Operation: Once installed, the system automatically manages charging and isolation — no switches or monitoring required.
| Feature | Generic Isolators | True® Isolator Kit |
|---|---|---|
| Automatic Voltage Control | ❌ Often missing | ✅ Built‑in smart sensing |
| Durability | ❌ Standard parts | ✅ Marine‑grade, heavy‑duty |
| Installation | ❌ Complex wiring | ✅ Simple, DIY‑friendly |
| Starter Battery Safety | ❌ Not guaranteed | ✅ Always protected |
| Versatility | ❌ Limited use | ✅ Works on trucks, boats, RVs
|
Trusted by Enthusiasts
True® has built a reputation among off‑roaders, overlanders, and marine users because it consistently delivers reliability. When you’re miles from civilization or anchored offshore, dependable power management isn’t optional — it’s essential.
Bottom Line: The True® Auxiliary Battery Isolator Kit is the best because it combines smart technology, rugged durability, and ease of use. It gives you confidence that your starter battery is always protected while powering all your accessories, making it the go‑to choice for serious adventurers and professionals alike.
The True® auxiliary battery kit is designed for people who love DIY. Characterized by easy to install technology, this battery isolator system is perfect for your automobiles, UTV’s, RVs and recently a customer used it to manages the isolation of batteries while charging from solar power.
With the auxiliary battery isolator kit, all your batteries will be charged up and nothing to worries of being drawn down by regular use.
Features:
Installation is no brainer- 12V 140Amp smart auxiliary battery kit with Cut-in 13.3V
- Automatic switching using dual-sensing voltage-sensitive relay
- This technology is guaranteed no volt drop
- Compact size complete with battery connecting cables
- Maintenance-free auxiliary battery isolator kit
- Heat resistant casing and waterproof cables
- Order and dispatch today with USPS first class or priority mail
- Absolutely free delivery charges
Kit Composition
The recent growth in the demand for electrical accessory has brought strain to the vehicles or marine batteries. Car owners started to complain after experiencing difficulty in engine start-up. The worst story from UTV’s owner becomes stack in the wild after they use excessive lights. Auxiliary battery kit is the best solutions to the problem. True, for 5 years has been keeping your driving in hassle-free and absolute comfort by keeping your primary battery fully charge.