12v Isolator Switches of 2025
Best Choice1
Clicked 6 times in the last monthAWBLINAWBLIN Upgrade Battery Disconnect Switch with Voltmeter, DC 5-60V Master Isolator Cut/Shut Off Switch for Marine Boat Car Truck Camper RV Trailer Vehicles Engine Application (On/Off)
Main highlights- WIDE APPLICATION: Battery isolator switch is universal used for RV, Marine, Car, Boat, Camper, Travel Trailer, Truck, ATV, UTV battery and other engine application, makes it an effortless job of turning the battery on and off.
- PACKAGE INCLUDE: Equiped with 1* Battery Switch, 4*Removeable Side Plate, 1*Rubble Gasket, 1*Rear Cover, 4*Nut, 4*Screw, 1*2/8" Terminal. If you have any questions,please contact us via email. We are always here to support you.
- MORE STURDY, BETTER CONDUCTIVITY: Compared with the traditional ABS plastic shell material, the heavy duty cut off switch uses a better nylon 66 shell, high temperature resistance effect is better, more safe to use; The internal screw of the cutoff switch uses copper plated silver + silver contacts, which has better electrical conductivity, oxidation resistance and longer service life.
- LED DIGITAL VOLTMETER DISPLAY: The battery isolator switch surface is equipped with an LED display, which displays the current voltage status in real time, allowing you to better monitor the battery status at any time. When the battery switch is on, the upper button screen monitors the voltage in real time. When the master disconnect switch is off, the screen does not display.
- EASY TO OPERATE: On/Off 2 position, Suitable for various 6V/12V/24V/48V/60V systems. Current: 250A Continuous at DC 12V; 300A for 30 minutes. Clockwise to turn on , counter clockwise to turn off.
- COMPATIBILITY & SAFETY: This Battery Kill Switch Used for DC 5 - 60V systems to isolate and secure the electrical system; eliminate any power draw from the battery when vehicle is not in use, disconnects the battery safely; provide a reliable way to shutdown electrical power during maintenance and protect batteries from excessive drain.
9.8Exceptional
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Value for Money2
POWO CarlifeSmart Dual Battery Isolator 12V 140A Auto or Manual Control, Waterproof Voltage Sensitive Relay(VSR) with Digital Voltmeter for Car, RV, ATV, UTV, Boat, Marine
Main highlights- When your engine is turned on and the main battery is fully charged, the relay will start charging the Auxiliary battery at the same time.
- Voltage Sensitive Relay allows 2 batteries to be charged from your engine alternator at the same time.
- Smart battery isolator kit compatible with most RVs, Cars Vehicles, ATVs, UTVs, Polaris, Can-Am, Boats, 12VDC Marine, 4wd, caravan, etc. A compact battery isolator can be placed almost anywhere.
- Smart Voltage Sensitive Relay can automatically disconnect or connect the auxiliary battery according to the voltage of the main battery.
- Smart Voltage Sensitive Relay can automatically disconnect or connect the auxiliary battery according to the voltage of the main battery.
- Smart Battery Isolator is IP68 WATERPROOF grade, so it can withstand various weather conditions, and you don’t need to stress about traveling.
- Not Compatible with Ternary lithium battery!!
- Input voltage lower than 11V or Input voltage more than 17V, circuit will be automatically disconnected to protect main battery from over discharging.
9.5Excellent
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3
Nilight21% OffNilight - 90015A Battery Switch 12-48V Waterproof Heavy Duty Battery Power Cut Master Switch Disconnect Isolator for Car Vehicle RV and Marine Boat (On/Off),2 Years Warranty
9.5 worth the money9.5 Easy installation9.3 Simple to useWhy we love it
Durable ABS plastic construction.
Ideal for various vehicles.
Simple to install.
9.4Excellent
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4
Gioyonil35% OffBattery Disconnect Switch Master, 12V-48V Waterproof Power Isolator On-Off Kill Switch 275Amps High Current for Car RV Marine Boat Truck ATV Vehicles
9.5 Easy installation9.3 worth the money9.3 DurabilityWhy we love it
The Battery Isolator Switch is a great way to ensure that your battery is properly shut off when not in use, and to protect it from excessive drain.
It is also a great way to make sure that your electrical system is properly isolated and secure.
This Battery Isolator Switch is also very easy to use, and comes with 4 mounting bolts.
9.3Excellent
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5
NilightNilight 12V 140AMP Dual Battery Isolator Voltage Sensitive Relay Smart VSR Dual Battery Automatic Charger Relays Auto Disconnect Switch Waterproof for Truck Van RV ATV UTV Boat Can Am
Main highlights- Wide Application: 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. Suitable for 12v camper van trucks, caravans, RV, ATV, UTV, Boat and camping applications.
- Versatile: Our VSR Battery Isolator can be used to protect any 12 Volt battery; It eliminates the possibility of running the battery out and keeps it fully charged for when you need it most. Important Note: This item is not compatible with Lithium Batteries
- Safe and efficient: The dual battery isolator is made of high-quality material casing and a silicone seal, withstanding extreme weather conditions and vibrations. Its IP66 waterproof rating ensures safe off-road use in dusty, wet, and unpredictable environments, providing you with a reliable and durable solution for your marine or automotive dual battery needs.
- Package Includes: 140amp smart battery isolator; Mounting Hardware(screws, nuts, spring washers, ring terminal).
- Function: The Voltage Sensitive Relay (VSR) ensures that the primary battery is always charged and ready to start the vehicle by cutting in at 13.3 volts and cutting out at 12.8 volts. When your engine is turned on and the starting battery is fully charged, the isolation will start charging the second (auxiliary) battery at the same time. Enables you to charge two batteries from one alternator at the same time.
9.2Excellent
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6
MalicteleBattery Disconnect Switch, Malictele On/Off Side Post Battery Switch 275A 12-48V Power Cut Master Disconnect Isolator for Car Vehicle RV and Boat
Why we love it
Simple installation process.
Ideal for multiple vehicle types.
Ensures stable electrical connections.
9.0Excellent
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7
FEITON500A High Current 12V-36V Battery Cut Off Switch with Lock-Out Plate, Replace 20247, Waterproof Master Battery Disconnect Switch Fixed Handle Isolator for Car, Truck, RV, Yacht, Boat
Main highlights- UNIVERSAL BATTERY DISCONNECT SWITCH - Which protects against electrical fires and theft when equipment is not in use and provides a reliable way to shutdown electrical power during maintenance and protect batteries from excessive battery drain. Disconnect the battery when you are not driving a Car / Boat / RV / Yachts / Vehicle / ATV / Trucks / Off-road / Tractors / Agricultural Equipment, etc. Keep you safe all the time.
- SIMPLE OPERATION - High Current Battery Cut Off Switch with Lock-Out Plate, turn the knob to turn it on or off. The heavy duty rotary handle is locked to the panel through a padlock hole to prevent accidental opening or closing, as well as tampering or unauthorized use.
- HIGH CURRENT & WATERPROOF - 12V-36V, 500A rated current, 5000A instantaneous current, replacement part number: 20247, 10MM threaded studs with nuts, polarity negative, metal material, watertightness processing.
- EASY TO INSTALL - Compared to the remote control switch, there is no need for programming or code, just connect the product with wire, the operation is very simple. For the specific connection mode, please refer to the wiring diagram in our product picture. If you have any questions, please contact us in any time.
8.9Very Good
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8
AmpperAmpper Side Post Battery Disconnect Switch, 12-48 V Battery Power Cut Master Switch Disconnect Isolator for Car, Vehicle, RV and Boat (On/Off)
Why we love it
Easy installation with no modifications needed.
Durable and safe ABS plastic housing.
Ideal for multiple vehicle types.
8.7Very Good
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9
SpurtarSpurtar Battery Disconnect Switch 12V 24V 36V with Lock-Out Plate 500A High Current Battery Kill Switch Power Cut Off Shut Off Isolator for Car Truck Winch RV Boat Backhoe Tractor Motorhome Hot Rods
Main highlights- Wide Application: Spurtar battery disconnect switch 12v heavy duty is widely used for vehicles including truck, RV, backhoe, hot rods, tractor, camper, motor or equipment likes winch, generator, hydraulic pump, trolling motor and more disconnect
- Safety Protection: This heavy duty battery isolator provides a crucial safety feature by disconnecting the battery to prevent accidental electrical fires, short circuits, or parasitic drain when the vehicle or equipment is not in use
- High-Security: Spurtar battery disconnect switch with lockout plate ensures that power adjustments on electrical system remain firmly under the user's command, preventing unauthorized access and potential hazards, preventing tampering, theft, or accidental disconnection
- High Current Battery Disconnect Switch: With a rated current of 500 Amp Continuous, and 5000A Intermittent, Spurtar battery shut off switch safely isolate and secures 12-36V DC electrical system connections
- Easy Operation: The battery shut-off switch is toggled smoothly with a clear click sound, without jamming. Spurtar battery cut off switch with on / off indicated face plate is easy to install, and can be used for professional installation
8.6Very Good
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10
GANETZOON/Off Battery Disconnect Switch 12V 48V - 275A Side Post Power Cutoff Isolator for Car RV Marine ATV Boat, Heavy Duty Batteries Kill Switches (Negative,Vertical)
Main highlights- UNIVERSAL COMPATIBILITY: Fits most of top-post batteries, including common automotive and marine models. Compact design adapts to tight spaces without interfering with existing systems
- SIMPLE & EASY SETUP: Directly connects to standard side post batteries negative (17-19mm terminals) with no modifications. Effortless installation in under 5 minutes, eliminating complex wiring or extra parts.
- RELIABLE POWER ISOLATION: Designed for 12-48V DC systems, instantly cuts off battery drain during vehicle storage and supports 300A continuous / 500A intermittent / 1300A momentary current (12V). Ideal for cars, boats, RVs, ATV, marines and seasonal equipment to prevent accidental discharge.
- EXTENDED BATTERY LIFESPAN: Safeguards against parasitic power loss, proven to maintain battery health during extended inactivity. Backed 24/7 support.
- BUILT FOR TOUGH ENVIRONMENTS: Reinforced ABS housing resists extreme temperatures and moisture. Smooth switching mechanism ensures long-term reliability
8.4Good
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