With so many Best Battery Isolator brands on the market – from prominent names like VEVOR,STINGER,RECOIL,KeyLine Chargers,POWO Carlife,NVX to smaller manufacturers – making the right choice can feel overwhelming. But we’re here to help simplify your search for the best product.
We extensively tested and evaluated dozens of top-rated Best Battery Isolator across various price points, spending over 100 hours comparing the contenders side-by-side. Based on our in-depth first-hand research, we compiled this list of stand-out Best Battery Isolator to consider. Our top recommendation is VEVOR Best Battery Isolator for its uncompromising quality and performance.
Below you’ll discover more of our favorite Best Battery Isolator picks. And be sure to consult our buying guide for expert insights on selecting the ideal product for your individual needs and budget. With us guiding your decision, you can shop confidently knowing you’ve chosen an exceptional Best Battery Isolator you’ll truly love.
Premium Pick
RECOIL 500 Amp Mobile Audio Battery Isolator and High Current Starter Relay
Budget Pick
Dual Battery Isolator Kit, 140Amp Battery Isolator 12v Kit, Battery Disconnect Switch 12V | Cars,
Top 10 Best Battery Isolator
We researched and compared the top products in the Best Battery Isolator category to provide you with these recommendations.
1. VEVOR Split Charge Relay Kit, 6mtr 12V, Automatic Dual Battery Isolator Kit with 140AMP Voltage
- 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.
- 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.
- 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.
- Superb IP65 Waterproof: Voltage sensitive relay is waterproof up to IP65, which means that your isolator is secure for use even in dusty, wet, and unexpected extreme weather environments. Great for extreme vibration applications as well.
- Fit Various Vehicles: This isolator kit 12v has a compact size of 2.66" x 2.11" x 2.66", suitable for almost anywhere. Mainly used in off-road vehicles, camper vans, RVs, caravans, 4x4s, leisure vehicles, ships, yachts, marine applications, etc.
2. 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
3. RECOIL 500 Amp Mobile Audio Battery Isolator and High Current Starter Relay
- BRL500 handles 500 Amps continuous and 700 Amps Surge
- Eliminates multiple battery drain as it stops battery bank from getting power from each one
- Prevents the equipment from discharging the main battery when it is operated while the engine is off
- Does not create a voltage drop to the second battery like conventional isolator
- Extends battery life.Excellent waterproof performance, high quality in any weather conditions
4. Dual Battery Isolator Kit, 140Amp Battery Isolator 12v Kit, Battery Disconnect Switch 12V | Cars,
- DUAL BATTERY ISOLATOR 12V KIT Measuring only 2.6" x 2.6" x 2", it's the perfect dual batteries isolation kit for under the hood or Battery Relocation Kit. Say goodbye to power-robbing traditional battery isolator diodes, solenoids, or battery disconnect switch 12v with our Battery Isolator 12V that delivers optimal performance without sacrificing power.
- DUAL BATTERY KIT by Keyline Charger is a Voltage Sensitive Relay that charges two battery systems. It 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. It's like having two power sources with only one alternator.
- RUGGED DURABILITY: The ideal choice for those who require a reliable marine battery isolator or a dual battery smart isolator for their car audio battery charger needs. The KeyLine Automatic 140 Amp Dual Battery Isolator is a durable product that can withstand extreme weather conditions and vibrations. Its IP65 certification guarantees its safety for off-road use, even in dusty and wet environments.
- 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!!
5. Smart Dual Battery Isolator 12V 140A Auto or Manual Control, Waterproof Voltage Sensitive Relay(VSR)
- 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.
- Voltage Sensitive Relay allows 2 batteries to be charged from your engine alternator at the same time.
- 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.
- Smart Battery Isolator is IP68 WATERPROOF grade, so it can withstand various weather conditions, and you dont need to stress about traveling.
- 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.
- Not Compatible with Ternary lithium battery!!
6. NVX BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats.
- 500 Amps at 12V Continuous Power Handling
- 700 Amps Surge Power Handling
- Switching Power: 10 - 16 VDC
- Draws Less Than 1 Amp When On
- Mobile Audio Relay and Battery Isolator
7. Nilight 12V 140AMP Dual Battery Isolator Kit with 6 AWG Power Cable Terminal Voltage Sensitive Relay
- 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.
- 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.
- 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
- Package Includes: 1x 140amp smart battery isolator; 1x 6AWG Red Battery Cable with Two Connectors; 1X 6AWG Black Battery to Ground Cable with Two Connectors; 1x negative marine battery terminal; 2x positive marine battery terminals; 3x 5/16 battery clamp; 8x screws; 6x nuts; 4x spring washers; 2x red heat shrink; 1x black heat shrink; 2x insulated blue ring terminals; 6cable ties.
8. 500 Amp Battery Isolator for Mobile Audio Relay Continuous Battery Isolator Relay Kit 12v 500A
- 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.
- 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.
- FEATURE- Battery isolator solenoid is made of high-quality materials, excellent performance, and durability. Easy to install and start up immediately.
9. Victron Energy Argofet Battery Isolators 200-2AC (2 Batteries 200 amp)
- Victron Energy Argofet battery isolators 200-2AC, allow simultaneous charging of two batteries from one alternator, without connecting the batteries together
- 12/24 Volt auto ranging: Victron Energy Argofet battery isolator will automatically adjust to a 12-Volt or 24-Volt system
- In contrast with diode battery isolators, FET isolators have virtually no voltage loss. Voltage drop is less than 0.02-Volt at low current and averages 0.1-Volt at higher currents
- Discharging the accessory battery for example will not result in also discharging the starter battery
- When using Victron Energy ARGO FET Battery Isolators, there is no need to also increase the output voltage of the alternator. However, care should be taken to keep cable lengths short and of sufficient cross section
10. 250 Amp Dual Battery Isolator Kit, Universal 12V/24V VSR Voltage Sensitive Relay Switch Kit, Heavy
- Smart Battery Isolator: The dual battery isolator ensures that the main battery is always charged and ready to start the vehicle. It's like your vehicle has two separate power sources for each battery while only having one alternator
- Voltage Display: After connection, the voltage display is 13.5V-16V(12V working voltage); 27V-32V (24V working voltage). The battery isolator will disconnect immediately if it is below 12.5 V. There is a 5 second delay when connecting or disconnecting automatically
- Applicable to Lithium Batteries: The dual battery isolator adds a lithium battery connection cable, so it can be applied to vehicles with lithium batteries to maintain the stable performance of the car battery. This product has 4 fixing holes for easy installation
- Unrestrained Start Engine: Current: 250 Amps; Voltage: 12/24V (Universal). LCD display: real time monitoring of 2 batteries voltage. After installing this smart battery isolator, there is no need to worry that the engine cannot be started when the battery is dead, just press the emergency button and turn on the auxiliary battery to start quickly
- Wide Range of Applications: The battery isolator kit has a small design, does not take up space, and is compatible with a variety of vehicles, such as 12V/24V trucks, ATVs, UTVs, boats, RVs, vans, off-road vehicles, and campers
Peter
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