Updated: 17 Feb 2025

red battery isolators

Explore up to 45% Off

Updated: 17 Feb 2025

#1

Best Choice
KEMIMOTO Dual Battery Isolator Kit, 12V 140Amp UTV-SBI-CM Dual Battery Kit for UTV ATV RV Car Truck Marine Boat, Compatible with Can am, Pioneer, Jeep Chevy, Voltage Sensitive Relay VSR, Accessories

9.9

KEMIMOTO

Read more

Why we love it

Compatible with various vehicles including ATVs and boats.

Separates power sources for efficient battery management.

Smart charging prioritizes starting battery, ensuring reliability.

Main highlights

Wide Compatibility and Smart Charging
The Kemimoto Battery Isolator Kit is compatible with various vehicles and features smart charging to prioritize and balance battery power efficiently.

Ideal for Dual Battery Vehicles
Perfect for ATVs, boats, RVs, UTVs, trucks, and camper vans, ensuring reliable power management for both starting and auxiliary batteries.

Easy Installation and Performance
Customers praise the easy installation process and effective performance, highlighting the clear instructions and reliable operation of the isolator kit.
#2

Value for Money
NVX BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats.

9.8

NVX

Read more

Main highlights

Switching Power: 10 - 16 VDC

700 Amps Surge Power Handling

500 Amps at 12V Continuous Power Handling
Curious about how we select the top products for you? Explore How It Works

How do we rank
Our AI-powered platform ranks products using multiple weighted factors from millions of products and user reviews across the web, providing the most valuable and real data. Higher scores rank first.
#3
Seachoice Battery Select Switch, Disconnect Isolator Cutoff, Dual, 12 -50V

9.6

SEACHOICE

Read more

Main highlights

UL listed, ignition protected and CE approved

Permits selection between batteries for starting, charging or operation in parallel

For use with two or more batteries and systems under 50V
#4
Stinger SGP32 200 AMP Battery Relay Isolator and Relay

9.5

STINGER

-45%

Read more

Main highlights

Prevents primary battery discharge

Maximum current transfer

200 AMP Battery Isolator and Relay

-45%
#5
Nilight 12V 140 AMP Dual Battery Isolator Auto Manual Voltage Sensitive Relay with Digital Voltmeter Smart VSR Automatic Charger Disconnect w/Voltmeter for Truck RV UTV Boat Can Am

9.4

Nilight

Read more

Why we love it

Charges two batteries simultaneously.

Durable in extreme conditions.

Real-time voltage monitoring.

Main highlights

Dual Battery Charging Efficiency
Simultaneously charges two batteries using one alternator, ensuring readiness.

Versatile Application Scenarios
Ideal for RVs, boats, and off-road vehicles, maintaining charge.

Real-Time Voltage Display Feature
LED display for real-time voltage status, praised for convenience.
#6
500 Amp Battery Isolator for Mobile Audio Relay Continuous Battery Isolator, 12v Battery Disconnect Relay 500A Relay and Isolator

9.3

KanSmart

-11%

Read more

Main highlights

POWERFUL FUNCTION - 12v battery isolator can continuously power handling 500 amps at 12V and handling of 700 amps at surge power | Doesn't create a voltage drop to your second battery unlike common isolators do. battery isolator 500 amp with a maximum current transfer, power on demand.

ELIMINATES BATTERY DRAIN - Normally, when two car batteries are connected in parallel, they are easy to charge and discharge each other | The relay battery isolator stops the battery bank from getting power from each one, eliminating that negative effect | Reducing the natural consumption of batteries after power off, lengthens the life of the primary battery.

500 AMP BATTERY ISOLATOR - Perfect for any application with multiple batteries that need to be isolated including Marine, Mobile Audio, Off-Road, Power Sports, etc. | battery disconnect relay is used to isolate the second battery which powers audio, visual navigation, or other equipment.

-11%
#7
Smart Dual Battery Isolator 12V 140A Auto or Manual Control, Waterproof Voltage Sensitive Relay(VSR) with Digital Voltmeter for Car, RV, ATV, UTV, Boat, Marine

9.0

POWO Carlife

Read more

Main highlights

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.

Input voltage lower than 11V or Input voltage more than 17V, circuit will be automatically disconnected to protect main battery from over discharging.
#8
Blue Sea Systems 9001E e-Series Battery Switch, Selector 4 Position, Red

8.9

Blue Sea Systems

Read more

Why we love it

4 power positions

Safe for boats

Waterproof certified

Main highlights

Key Features
Offers 4-position switching for isolated battery banks, ignition protection for safe use on gas boats, and IP66 waterproof rating for durability.

Ideal Use Cases
Perfect for marine applications, combining or isolating battery banks in boats, and ensuring safety and performance in gasoline-powered marine environments.

Customer Reviews
Highly praised for its robust build quality, reliable performance in demanding marine conditions, and ease of installation.
#9
Recoil SRL500 Microprocessor Controlled 500A Smart Battery Isolator and High Current Starter Relay, Dual Sensing Smart Relay, with Ring Terminals

8.7

RECOIL

Read more

Main highlights

SRL500 handles 500 Amps continuous at 12V and 700 Amps Surge. Microprocessor-controlled smart relay does not create a voltage drop to the second battery like conventional isolator.

Once the main battery reaches 13.2V, the smart relay connects two batteries. Once the system drops below 12.7V, it disconnects two batteries.

Eliminates multiple battery drain as it stops battery bank from getting power from each one and extends battery life. Prevents the equipment from discharging the main battery when it is operated while the engine is off.
#10
VEVOR Split Charge Relay Kit, 6mtr 12V, Automatic Dual Battery Isolator Kit with 140AMP Voltage Sense Relay VSR, Compatible with RV Marine Car Vehicle Truck Caravan Camper Yacht ATV UTV Boats Workshop

8.6

VEVOR

Read more

Main highlights

Rugged & Durable: Split charge relay is made of a premium plastic material, which is shockproof and dustproof, ensuring maximum strength and durability for long-lasting usage. You will always be prepared and confident to take on any challenge.

Easy to Install: This split charge relay kit comes with complete accessories, allowing you to start installing directly without purchasing additional components. Besides, we have detailed instructions for you to complete the installation easily and flawlessly.

Dual Battery Isolator: The smart battery isolator 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 can charge two batteries simultaneously and isolate them from each other when the vehicle is turned off.

Discover top deals and categories on Amazon Check Deals

red battery isolators

KEMIMOTO Dual Battery Isolator Kit, 12V 140Amp UTV-SBI-CM Dual Battery Kit for UTV ATV RV Car Truck Marine Boat, Compatible with Can am, Pioneer, Jeep Chevy, Voltage Sensitive Relay VSR, Accessories

9.9

Why we love it

Main highlights

NVX BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats.

9.8

Main highlights

Seachoice Battery Select Switch, Disconnect Isolator Cutoff, Dual, 12 -50V

9.6

Main highlights

Stinger SGP32 200 AMP Battery Relay Isolator and Relay

9.5

Main highlights

Nilight 12V 140 AMP Dual Battery Isolator Auto Manual Voltage Sensitive Relay with Digital Voltmeter Smart VSR Automatic Charger Disconnect w/Voltmeter for Truck RV UTV Boat Can Am

9.4

Why we love it

Main highlights

500 Amp Battery Isolator for Mobile Audio Relay Continuous Battery Isolator, 12v Battery Disconnect Relay 500A Relay and Isolator

9.3

Main highlights

Smart Dual Battery Isolator 12V 140A Auto or Manual Control, Waterproof Voltage Sensitive Relay(VSR) with Digital Voltmeter for Car, RV, ATV, UTV, Boat, Marine

9.0

Main highlights

Blue Sea Systems 9001E e-Series Battery Switch, Selector 4 Position, Red

8.9

Why we love it

Main highlights

Recoil SRL500 Microprocessor Controlled 500A Smart Battery Isolator and High Current Starter Relay, Dual Sensing Smart Relay, with Ring Terminals

8.7

Main highlights

VEVOR Split Charge Relay Kit, 6mtr 12V, Automatic Dual Battery Isolator Kit with 140AMP Voltage Sense Relay VSR, Compatible with RV Marine Car Vehicle Truck Caravan Camper Yacht ATV UTV Boats Workshop

8.6

Main highlights

Similar products on Amazon

AIVWUMOT Spare Mini Red Key 2 PCS for Battery Disconnect Isolator Power Kill Switch Fit for Marine Car Boat RV ATV Auto Truck

6 Pack Mini Red Keys for Battery Disconnect Isolator Power Kill Switch - Spare Keys for Marine, Car, Boat, RV, ATV, and Truck Use

Nilight 1-2-Both-Off Battery Switch, 12V-48V Battery Disconnect Master Cutoff Switch for Marine Boat Car RV ATV UTV Vehicle, Waterproof Heavy Duty Battery Isolator Switch

AutoE 2pcs Battery Cut Off Kill Isolator Switch Spare Keys Marine Auto Boat Truck (Cap Shape), Red

AIVWUMOT 6 Pcs Spare Mini Red Keys for Battery Disconnect Isolator Power Kill Switch for Marine Car Boat RV ATV Auto Truck

Top Post Battery Disconnect Switch,Battery Shut Off Switch 12V Heavy Duty,Powersports Switches,Universal Car Auto Battery Link Terminal Cut Off Switch Master Disconnect Isolator(Red)

Molloparts 2X Battery Disconnect Switch Key Spare Mini Key Battery Disconnect Isolator Power Kill Switch Compatible with Marine Boat RV Car ATV Auto Truck Red Battery Cut Off Kill Isolator Switch

2PCS Battery Disconnect Switch Key, Mini Battery Disconnect Isolator Red Key, Power RV Battery Disconnect Key, Car Truck Marine RV ATV Battery Kill Switch Key

Dual Battery Isolator 12V 140Amp, Voltage Sensitive Relay VSR, Compatible with UTV Marine Car RV Boat Truck Trailer ATV Camper Moto, Not Fit for Lithium Batteries

RECOIL 500 Amp Mobile Audio Battery Isolator and High Current Starter Relay

More products you might like

Sign up and get exclusive special deals