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250A Smart Dual Battery Isolator 12V/24V Universal Voltage Sensitive Relay VSR for RV, ATV, UTV, Car,Camper, Truck, Boat, Off-Road Vehicles

4.5 (2) Write Review
Free shipping on orders over $31.42

$72.41

$ 33 .94 $33.94

In Stock

About this item

  • ✅【Smart Isolated Connection】: Auto-connect voltage:13.5V-16V (12V)/27V-32V (24V).Auto disconnect voltage: 12.5V, disconnect immediately if lower than 12.5V. Overvoltage: 16V/32V.LCD display voltage of two batteries.
  • ✅【Intelligent Power Borrowing】: When the need for high-power appliances such as winches or the main and secondary batteries are short of power, press the "emergency button", the blue light is on, in manual mode, the main and secondary batteries are connected, you can borrow power to start the car engine.
  • ✅【Protection Function】: Automatic detection of voltage and implementation of protection functions. Intelligent isolation connection to reduce the internal consumption between batteries and prolong the service life, and to charge and maintain the secondary battery when its voltage is insufficient.
  • ✅【Widely Applicable】: Widely used in various vehicles - 12V/24V cars, jeeps, trucks, RVs, ATVs, UTVs, boats, vans, off-road vehicles, caravans, camping, etc.
  • ✅【Easy to Use】: Just plug in the power cord and take out the power cable. Pure copper connecting rod makes the connection easy. Four fixing holes, easy to install.


Connection instructions.
The two thick wires of the isolator are connected to the positive terminal of the main and secondary batteries respectively according to the connection diagram. The thin black wire is connected to the negative terminal of the main battery, and the emergency start switch wire is connected to the signal wire of the ignition switch control.
Under the normal operation of the isolator, the blue light will be on or flashing. When the main and vice battery are out of power, press the emergency start button to borrow power to start the car engine.

  • Input voltage: 12V/24V working voltage and load voltage
  • Continuous current:250A normally open type
  • Peak current:250A Normally open
  • Auto-connect voltage:13.5V-16V (12V)/27V-32V (24V)
  • Auto disconnect voltage: 12.5V, disconnect immediately if lower than 12.5V
  • Overvoltage: 16V/32V
  • Weight: 700g
  • Size: 6*5.8*1.6inch
Do not place this product underwater.

Suresh kumar
Reviewed in Canada on March 31, 2025
I don’t know Chinese language?
The MotorMan
Reviewed in Canada on November 5, 2024
So far so good!
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