Description
How True® Lithium Isolator Works
1. Once the engine is running and the charging system boosts the start battery’s voltage to 13.5 volts—the SBI’s cut-in threshold—the True® Smart Lithium Battery Isolator activates. It then links both batteries, allowing them to charge at the same time. A blue glow from the internal LED signals that the system is engaged.
2. When every voltage source falls below 13.2 volts—the SBI’s cut-out threshold—the True® Lithium Battery Isolation Manager disengages, separating the batteries. The internal blue LED switches off, indicating that the system is no longer actively charging.
3. When the True® lithium battery isolator’s LED indicator turns off, it signifies that the primary and secondary batteries have been electrically isolated. This disconnection prevents parasitic loads on the auxiliary battery from depleting the charge of the start battery.
4. After restarting the vehicle, once the start battery reaches 13.5 volts—the designated engagement threshold—the True® Lithium Smart Battery Isolator activates. The LED lights up, signaling that the secondary battery is now connected and charging.
LED Indications
On: Lithium Isolator engaged
Off: Lithium Isolator disengaged
Dimensions: 2.7(L) x 2.7(W) x 1.95(H) inches
🔧 Advanced Technical Features
- Automatic dual-sensing detects voltage from either battery to trigger engagement
- Cut-in at 13.5V / Cut-out at 13.2V for lithium-specific voltage thresholds
- Reverse polarity protection prevents damage from incorrect wiring
- Short circuit protection adds an extra layer of safety
- Maintenance-free operation—This battery isolator for lithium battery has no manual resets or adjustments needed
🛠️ Installation & Build Quality
- Compact footprint (2.7″ x 2.7″ x 1.95″) fits tight spaces
- 3M Dual Lock™ mounting system for secure, vibration-resistant installation
- Suspension mounting option—can hang freely in cabling
- Fully sealed housing resists moisture, dust, and debris
- Silicone-coated circuit board for enhanced durability
- Color-coded wiring simplifies installation for DIY users
- LED status indicator provides instant visual feedback
- Made in the USA with high-quality components and rigorous testing
If you’re building a dual lithium battery setup for a UTV, RV, boat, or solar rig, this isolator is engineered to deliver reliable performance in extreme conditions.
Testimonials
Joseph Robinson –
A Bit Pricey, But Justified
Cheaper isolators fried my lithium battery. This one does the job right. The cost is worth the peace of mind.
Michael Harris –
Cables Could Be Longer”
Had to buy extensions for my truck’s dual-battery setup. Isolator itself is fantastic, but include longer cables, True®!
Megan Lewis –
Plug-and-Play Simplicity
Installed in 20 minutes—no fuss. The LED lights make it easy to diagnose charging status. Perfect for my RV’s dual-battery system.
Christopher Taylor –
Silent and Efficient
No annoying clicks or delays—just smooth, automatic switching. My fridge runs all night without draining the starter battery. Worth every penny
Jessica Miller –
Installation Took Some Effort
Performance is stellar, but the wiring diagram could be clearer. Had to consult a forum to get it right. Once set up, it’s been bulletproof.
Joseph Martinez –
No Heat Issues
“Runs cool even in 100°F weather. Previous isolators overheated; this one doesn’t. Huge win for desert camping
Emily Johnson –
Perfect for My Overland Rig
Keeps my LiFePO4 battery charged without overloading the starter battery. Handles my fridge and lights effortlessly. Zero issues after 8 months of rugged use!
Michael Brown –
Lithium-Specific? Finally!
Most isolators don’t work well with lithium batteries—this one does. Charges at the right voltage and stops when full. A game-changer for my solar setup.
Matthew Davis –
Wish It Had Bluetooth Monitoring
Works flawlessly, but for the price, I’d love an app to check battery status remotely. Still, the best isolator I’ve used for my campervan.
David Wilson –
Saved My Boat Batteries
No more dead cranking battery! This isolator intelligently manages power between my lithium house battery and lead-acid starter. Marine-proof and reliable.
James Anderson –
Works with Smart Alternators!
Finally, an isolator that plays nice with my Jeep’s smart alternator. Charges my lithium auxiliary battery perfectly, even at variable voltages.
Christopher Martin –
Zero Voltage Drop
My winch used to kill my primary battery. Now, the isolator ensures my lithium battery takes the load. Voltage stays rock-steady.
Amanda Thompson –
Ideal for Solar + Lithium Combos
Pairs perfectly with my 200W solar panel. Charges efficiently and protects both batteries. No more anxiety about power on long trips.