True® Smart Battery Isolator
$43.00
Item number: IP-DS14012.913.4
Suggested retail price $104.95
NOW features PEP® making it the most efficient isolator on the market.
True® Smart Battery Isolator – Intelligent Dual Battery Management
Engineered for off-road vehicles, RVs, boats, and trucks, the True® Smart Battery Isolator delivers zero-compromise power control in a rugged, compact form. This 12V system uses advanced voltage-sensitive technology to automatically manage dual battery setups—ensuring your starter battery is never drained by auxiliary loads.
Electronic Specifications
| True part number | Rating Voltage | Continuous Current | Intermittent Current | Cut in voltage | Cut out voltage | Ignition Protection |
IP-DS14012.913.4 |
12V |
140 Amp |
170 Amp |
13.4 V* |
12.9 V* |
UL1107/UL1500 |
LED Indications
On: Isolator engaged
Off: Isolator disengaged
Dimensions
2.7(L) x 2.7(W) x 1.95(H) inches
Description
- When the engine is running and the charging source raises the voltage of the start battery to 13.4 volts* (cut in threshold), the True Smart Battery Isolator (SBI) engages and connects the two batteries to charge simultaneously. The SBI's internal LED will glow blue.
- When all voltage sources drop below 12.9 volts* (cut out threshold) the Smart Battery Isolator will disengage and the blue LED will go out.
- When the SBI LED is out the batteries are separated thus preventing the power of your start battery from being drained by use of the accessories powered from the second battery.
- When the vehicle is restarted and the start battery has recharged to 13.4 volts* the Smart Battery Isolator engages, the LED will illuminate and the second battery is connected to receive charging.
*The True Smart Battery Isolator is programmed with a 10 second delay before engaging or disengaging.
Trucks & 4WDs
Powers winches, lighting, fridges, and inverters from an auxiliary battery while protecting the starter battery from drain—ideal for off-road, worksite, and overland setups.
Cars & SUVs
Supports aftermarket accessories like sound systems, dash cams, and emergency lighting without compromising engine start reliability.
Boats & Marine Vessels
Separates house and engine batteries, ensuring navigation, bilge pumps, and onboard electronics run independently and safely.
RVs & Campers
Keeps living space powered with solar, lighting, and appliances while maintaining a charged starter battery for travel.
Commercial Fleets
Enables reliable accessory use (e.g., GPS, radios, refrigeration) in delivery vans and service vehicles without risking downtime.
Emergency and Service Vehicles
Essential for maintaining the charge of batteries dedicated to life-saving or essential service equipment, ensuring reliability when the vehicle is stationary or idling.
“The True® Lithium Kit was a game-changer for my 4WD setup. Easy to install and rock-solid performance on long trips.”
— Mark T., Minnesota
“Installed it in my boat—no voltage drop, no drama. The waterproof cabling and smart relay are top-notch.”
— William L., Utah
“Perfect for my caravan. The automatic battery management saves me time and worry—highly recommended.”
— Dave R., Colorado
Amazon Rating
1. 12V, 140A
2. Designed for multiple battery systems
3. Suitable for all types of 12V charging systems
4. Works will all types of batteries except Lithium
5. Provides ignition surge protection
6. Unique design provides simple installation
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Our perks
1-year all-inclusive warranty
We’ll replace it with a new one
Free shipping on returns
Send it back for free
Free, contactless delivery
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