The most popular dual battery isolator of 2023

Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete VSR Double Battery Automatic Charger, Fits Trucks, SUV, ATV, ATV, UTV, Boats & More, Upgraded
344 Reviews
Dual Battery Isolator Kit – HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, Complete VSR Double Battery Automatic Charger, Fits Trucks, SUV, ATV, ATV, UTV, Boats & More, Upgraded
  • RUGGED DURABILITY -This dual battery isolator kit is all you need to charge a dual battery system. It features a voltage sensitive chip ensuring your primary battery is always ready for your vehicle to run. This dual battery isolator is also built to withstand extreme weather environments, vibration and is water resistant.
  • EASY TO INSTALL – No alternator or ignition connection needed,You don’t need any additional components to complete installation as everything is included in the kit, including leads, connectors, screws, zip ties, and more.
  • VOLTAGE SENSITIVE RELAY – The Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It’s like having two separate power sources for each battery while only having one alternator!
  • FITS A WIDE VARIETY OF VEHICLES – This Dual Battery Isolator Kit with Printed Installation Instruction Manual Gives You the Power for Your Recreation Without Needing to Worry About Getting Home After.12V, 140A, 13.3V cut-in voltage, 12.8V Cut-out Voltage, Suitable for 12V 4WD, Marine, Truck, Caravan & Camping Applications.
  • BUY WITH CONFIDENCE – Every 140 Amp Dual Battery Isolator is Backed by an Industry Leading 12-month Warranty. If You are Not 100% Satisfied with Your Purchase, Simply Take Advantage of the “No Questions Asked, 30-Day Money Back” Guarantee.
1,123 Reviews
KeyLine Chargers 12V 140 Amp Dual Battery Isolator Voltage Sensitive Relay (VSR) Pro Dual Battery Kit
  • ZERO VOLTAGE DROP: Forget the traditional diode relays and so-called “solid state” devices that can rob you of almost 2 amps of output power! The KeyLine Dual Battery Isolator is the only unit designed with cutting edge programming to deliver optimum performance – with ZERO sacrifice. This compact battery isolator was built ultra-small (2.6″ x 2.6″ x 2″) to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries.
  • VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It’s like having two separate power sources for each battery while only having one alternator!
  • RUGGED DURABILITY: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your KeyLine isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. Great for extreme vibration applications as well.
  • WHAT YOU GET: (1) 140 Amp Voltage Sensitive Relay (VSR); (1) 20 ft red battery cable; (1) 2ft black ground battery cable; (2) positive brass marine type battery terminals; (1) negative brass marine type battery terminal; tinned copper lugs & heat shrink; cable ties; easy-to-follow instructions. Easy-to-follow directions for the most novice DIYer. Power wire in, power wire out. What could be easier?
  • BUY WITH CONFIDENCE: Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty. If you are not 100% satisfied with your purchase, simply take advantage of the No Questions Asked, 30-Day Money Back Guarantee!!
Spartan Power Smart Dual Battery Isolator 12V 140A Voltage Sensitive Relay VSR for Vans, Trucks, RV's, Motorhomes, ATV, UTV, Boats, Off Road Vehicles
34 Reviews
Spartan Power Smart Dual Battery Isolator 12V 140A Voltage Sensitive Relay VSR for Vans, Trucks, RV’s, Motorhomes, ATV, UTV, Boats, Off Road Vehicles
  • NOW ON AMAZON – EASY TO INSTALL: Designed for dual battery systems or second battery bank in your van, truck, RV, UTV, off-road vehicles, marine boats, etc.
  • VSR – VOLTAGE SENSITIVE RELAY: Automatic 140 Amp Dual Battery Isolator enables you to charge two battery systems from one alternator at the same time. A Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts.
  • VANLIFE? Now you can safely add additional batteries to help support your accessories such as power inverters, MPPT charge controllers, solar panels, refrigerators, audio, lights, pumps, winches, etc.
  • IP65 Protected: IP65 enclosure offers complete protection from dust, oil, and other non-corrosive material. Waterproof protection up to water projected by a nozzle against enclosure from any direction.
  • 3 YEAR WARRANTY: Every Spartan Power 12V 140 Amp Dual Battery Isolator is backed by a 3 year warranty. Have a question? We are an American company located in Reno, Nevada. Our expert technicians will be glad to answer any question that you may have!
Dual Battery Isolator Kit 12 Volt 140 Amp Voltage Sensitive Relay Complete VSR Double Battery Automatic Charger
141 Reviews
Dual Battery Isolator Kit 12 Volt 140 Amp Voltage Sensitive Relay Complete VSR Double Battery Automatic Charger
  • This item can install to most of vehicle,for example Truck, SUV, RV, ATV, UTV, Boat and so on.
  • Function: Cause your accessories to run from a separate battery while the engine is not working on your vehicle, and at the mean time holding your main battery charged and your vehicle always ready to work.
  • This package is including 12 Volt 140 Amp Voltage Sensitive Relay Isolator and includes all other accessrioes.It is including instruction.
  • It can work in dusty, wet and unexpected extreme weather condition.
  • Warranty : We provide 6-month warranty,If you have any questions ,You can contact us and we will reply you within 24 hours
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Stinger SGP32 200 AMP Battery Relay Isolator and Relay
1,224 Reviews
Stinger SGP32 200 AMP Battery Relay Isolator and Relay
  • 200 AMP Battery Isolator and Relay
  • Prevents primary battery discharge
  • Maximum current transfer
  • Extends battery life
  • Universal 12V Applications
TRUE® UTV-SBI-CM UTV Dual Battery Connect & Monitor Kit
615 Reviews
TRUE® UTV-SBI-CM UTV Dual Battery Connect & Monitor Kit
  • RETURNS AUTHORIZEDAMAZON WILL NOTACCEPTED
  • 1- True UTV-SBI-18 Isolator with silicon insulators andDual Lock fastner
  • 1- 36mm blue led volt meter with dual rdisplay (requires29mm mounting hole), inludesx 18ga duplex wire with connectors
  • 1 ea- Trueinch sealed 6ga Red and Black Cables with 6mm lugs
250 AMP Dual Battery Smart Isolator Universal 12V/24V Voltage Sensitive Relay Intelligent Dual Battery Isolator for Car, Truck, ATV, Battery Starter Controller Heavy Duty Power Switch Charge Relay
44 Reviews
250 AMP Dual Battery Smart Isolator Universal 12V/24V Voltage Sensitive Relay Intelligent Dual Battery Isolator for Car, Truck, ATV, Battery Starter Controller Heavy Duty Power Switch Charge Relay
  • Voltage: High current 250 Amp/ Continue Current: 250A normally open/ Universal application 12V/24V, LCD display voltage of two batteries
  • Automatically Connection Voltage (Delay 5 seconds) : 13.5V-16V(12V working voltage);27V-32V(24V working voltage)/ Automatically Disconnect Voltage (Delay 5 seconds) : 12.5V,disconnect immediately if it is below 12.5 V
  • Function: 250Amp battery isolator is a primary battery saver, which used to combine two batteries when an alternator is charging (engine running) and isolate them when not charging (engine off) so you can still start your vehicle.
  • Designed with Small Size, Can Fit Anywhere!/ Wide Use on a variety of vehicles–12V/24V Trucks, ATVs, UTVs, Boats, RVs, Vans, Off-road Vehicle, Caravan & Camping Applications.
  • Easy to install, Just power wire in, power wire out. No Need to discharge your vehicle’s original battery by trying your new equipment off-road
MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator
365 Reviews
MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator
  • 12V, 140A, 13.3V cut-in voltage, 12.8V cut-out voltage,; Package Include All the Bits and Pieces Needed for a Complete Installation
  • Working Voltage: Having Voltage Sensitive Chip,Rely Cuts in at 13.3 Volts and Cuts out at 12.8 Volts to Ensuring Primary Battery is Always Ready for Vehicle to Run.
  • Fuction:Like Having Two Separate Power Sources,The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine is not running on your vehicle While keeping your Main Battery Charged and Your Vehicle Always Ready to Go and Start When You Want It.
  • Compatibility: This battery isolators are small and suitable for almost anywhere, for ATV, UTV, Boats, RV’s,marine vehicle, truck, caravan
  • LIFETIME WARRANTY :100% High Quality and Enjoy Full Life Warranty, Free Exchange
250 AMP Battery Isolator Universal 12V-24V VSR Voltage Sensitive Relay Intelligent Dual Battery Isolator Kit for Car, Truck, RV, Emergency Battery Starter Switch Heavy Duty Charge Power Relay
123 Reviews
250 AMP Battery Isolator Universal 12V-24V VSR Voltage Sensitive Relay Intelligent Dual Battery Isolator Kit for Car, Truck, RV, Emergency Battery Starter Switch Heavy Duty Charge Power Relay
  • High current 250 Amp Battery Isolator, Universal application 12V/24V, LCD display voltage of two batteries.
  • Function: Dual battery isolator switch is a primary battery saver, which used to combine two batteries when an alternator is charging (engine running) and isolate them when not charging (engine off) so you can still start your vehicle.
  • Dual battery isolation protection controller, which automatically detects and identifies the system voltage after the isolator is powered on.Automatically Connection Voltage (Delay 5 seconds) : 13.5V-16V(12V working voltage);27V-32V(24V working voltage)/ Automatically Disconnect Voltage (Delay 5 seconds) : 12.5V,disconnect immediately if it is below 12.5 V.
  • Voltage Sensitive Relay designed with samll size, portable and compatible for a wide variety of vehicles as 12V/24V Jeep, Truck, SUV, RV, Caravan & Camping Applications. Don’t need to drain the original battery on your vehicles trying out your new devices when off-roading, the dual battery isolator will be a nice solution to lengthen the life of the primary battery when your vehicle engine is off…
  • With this dual battery isolator kit, no worries of engine cannot be started when original battery out of power, by pressing the emergency button to turn on the sub battery to start the engine. Easy to install, Just power wire in, power wire out.

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