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Top 10 Best 12V Battery Isolators Reviews & Buying Guide

If you’re in the market for a 12V Battery Isolators, you have a few different options to choose from. We’ll discuss the types currently available in the market, the pros and cons of each, and our top pick for the Best 12V Battery Isolators.

12V Battery Isolators – Best Sellers

Best 12V Battery Isolators – Top Picks

I have already minimized your options from hundreds to only 10 12V Battery Isolators and here you go with a quick comparison chart which should leave no confusion.

12V 140Amp Dual Battery Isolator, Ampper Battery Voltage Sensitive Relay (VSR) Smart Battery Isolator for Car, Vehicle, RV, ATV, UTV and Boat
  • Purpose: this voltage sensitive relay is design for two battery systems (SUITABLE for Acid-Lead batteries, NOT SUITABLE for Lithium batteries), allow to having two separate power sources while charging by one alternator, it's all need to charge and isolate two battery systems.
  • Primary Battery Protected: cuts in at 13.3 volts and cuts out at 12.8 volts. Ensure your primary battery is always charged and ready to start your engine, the secondary will be charged after the primary battery's volts exceed 13.3 volts.
  • Heavy Duty: this voltage sensitive relay is heavy built to suitable for almost anywhere even off-road, which is water resistant, shock resistant, dust proof and withstand unexpected extreme weather environments.
  • Compatible: used for DC 12 V two battery systems isolate and charge, universal used for car, vehicle, RV, ATV, UTV and boat, also two battery electrical equipment.
  • Easy to use: this VSR comes with mounting plate and 4 bolts for install. 100% SATISFACTION: no reason for return or change.
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
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!!
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
Ampper Battery Switch, 12-48 V Battery Power Cut Master Switch Disconnect Isolator for Car, Vehicle, RV and Boat (On/Off)
  • Heavy Duty: ABS plastic housing, durable made for safety use, rear cover insulates terminals against any short of circuits, equiped with 4 sets of bolts.
  • Operation: On/Off 2 positions, 275 A continuous at DC 12V, 455 A intermittent at DC 12V, 1250 A momentary at DC 12V.
  • Compatible: used for DC 12 - 48 V systems to isolate and secure the electrical system, can stand alone or be locked together with other switch.
  • Purpose: eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely.
  • Copper terminal stud size: 3/8" (10 mm) x 2, very easy to install, universal used for car, vehicle, Rv and boat, also electrical equipment's switch.
Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK
  • 80 AMP Battery Isolator and Relay
  • Prevents primary battery discharge.80A constant 150A peak
  • Maximum current transfer
  • Extends battery life
  • Universal 12V Applications
I LITTON Dual Battery Isolator 12V 140 Amp with Voltage Display Smart Battery Isolator Auto & Manual Mode Voltage Sensitive Relay (VSR) Auto Charger Battery Isolator for Truck ATV UTV Marine RV Boat
  • 【Manual State Function】: Long Press the button for 3 seconds, the BLUE led will be On, and the manual mode is on. Press the button each time, you can complete the circuit connection and disconnection. Circuit switched on the red indicator, voltmeter lights up at the same time. Switched off the red indicator, voltmeter lights off.
  • 【Auto State Function】: Long press the button for 3 button again, the BLUE led will be Off, the Auto mode is on. Voltage exceed 13.3V: Circuit will be automatically connected. Voltmeter & Indicator ON. Voltmeter lower than 12.7V: Circuit will be automatically disconnected. Voltmeter & Indicator Off.
  • 【Voltage Display】: This dual battery isolator is constructed with a voltmeter which will display the real-time voltage. If you connect 2 batteries, then the voltmeter will display the battery that has high voltage. The smart battery isolator is universal fit for truck, UTV/ATV, boat, marine, bus, etc.
  • 【Voltage Sensitive Relay】: Cut-in voltage: 13.3V and Cut-out voltage: 12.8V. Ensure the main battery is always charged so that you won’t worry about the the battery will drain out and stuck on the road. Very convenient and safe to use.
  • 【Pressure Protection】: Input voltage lower than 11V or Input voltage more than 17V: Circuit will be automatically disconnected so as to protect the main battery from over discharging. Please buy and use the dual battery isolator with confident because we offer quick and excellent after-sales service and “12 Months Warranty” for the products.
Smart Dual Battery Isolator 12V 140A Voltage Sensitive Relay (VSR) for Car, Vehicle, Vans, Trucks, RV, ATV, UTV and Boat
  • AutoDunk dual battery isolator kit. Ensures your main battery is always charged and ready to start your vehicle. The voltage sensitive relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts. It's like having two separate power sources for each battery and only one alternator.
  • This compact battery isolator was built ultra-small to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries. Suitable for almost anywhere even off-road, which is water resistant, shock resistant, dust proof and withstand unexpected extreme weather environments.
  • Used for DC 12 V two battery systems isolate and charge, universal used for car, vehicle, RV, ATV, UTV and boat, also two battery electrical equipment.
  • All AutoDunk products are manufactured using the highest quality materials. We are confident that they are the most durable in the market and will give you many years of reliable service. We stand behind this product with a comprehensive 2-year warranty and a 30-day money
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!
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

What to Consider Before Buying 12V Battery Isolators

Even deciding on an insignificant purchase can make you feel like choosing between the red pill or the blue one. But is the headache really worth it? Online shopping was meant to make our experience simpler, easier and enjoyable. But in reality it is quite easy to get confused on the decision which one to buy?.

This is where our efforts come in! This list of 12v battery isolators will surely save you valuable time and effort. However another question remains, what makes our compilation the best? Or on what basis you should trust this 12v battery isolators list.

Is it virtually possible to know every detail of a product for making a perfect purchase? The answer is definitely NO, it’s not! Then how do you make the correct decision while buying 12v battery isolators? Well, the complexity of selecting a single product from a sea of them can be simplified taking into consideration a few key metrics regarding the product.

We feed thousands of data to our AI regarding these products through advanced algorithms. Based on the relevant data i.e. brand, features, specs, ratings and reviews and many others (which are discussed below) a list of best 12v battery isolators has been prepared by the AI.

Brand Reputation:

Branded products might seem pricey but the point is they are charging those extra bucks for reliability. Unlike many other things, trust doesn’t come cheap. 8 out of 10 times you can trust a branded one.

Unique Features:

Enough and useful features make a product purchase worthy. This is the basic criteria to be followed.

Useful Specifications:

Matching the right specs according to your need is very important and we miss no important things.

Star Ratings:

Healthy ratings indicate a good product. Highest rated products rarely disappoint users. So, we pick the best rated units on our list.

Number of Reviews:

Higher number of reviews in the shortest period of time shows the product is accepted widely by a lot of customers. Customer feedback aka customer reviews are the most insightful source of judging a product’s merit. We take serious consideration into customer reviews and total numbers while choosing them.

Ratio of Positive Reviews Against Bad:

The final rating is an average of all ratings provided by users. But we can get a deeper look at the product’s performance if we analyze the ratings on each star level.

Ranking of the Seller:

Shows the reputation of the seller. Even if you choose the correct item, a bad seller can be a big hassle. So stare clear of them.

Product Ranking in Relevant Category:

These small little details are never left out of our consideration. This is what makes our selection even more confident and authentic.

Bang for the Buck:

Spending a fortune on 12v battery isolators is not a wise thing to do. Our every selected item should provide you the best value for the money you spent.

Selling Growth Over the Product Lifetime:

A product might have thousands of reviews and good ratings, still can be a bad choice. Once hyped products can be an outdated choice now. So, a gradual positive growth of any product indicates its reliability.

Latest Models:

Every product is perfected with every new edition. Those little improvements, upgrades and adjustments come real handy in user experience. So, we keep in mind to choose the latest ones.

Product Availability:

Unavailable product is like a dead lion. Discontinued items are surely not recommended.

Rating By Features:

There is a special segment in amazon where the product is rated according to different relevant features. This one is mostly overlooked by everyone. But we keep a keen eye on this!

Overall Versatility:

A product needs to be versatile and user friendly. Our aim is to prepare a list of best 12v battery isolators which will serve you in a wide range.

Amazon’s Preference:

Amazon’s choice can be a factor to consider. It creates a sense of reliability among customers. We value amazon’s choice and prepare all lists keeping this fact in mind.

Conclusion

After reading through all of the reviews and features of the different 12v battery isolators, it is clear that there are a lot of great options to choose from. However, the best option for each person will vary depending on their individual needs and preferences. But here, the products we have listed above, have great features and are highly rated by customers. If you are looking for the Best 12V Battery Isolators, then any of these 10 would be a great choice for you.

Last update on 2023-02-01 at 02:04 / Affiliate links / Images from Amazon Product Advertising API

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