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Are you looking for the Best Battery Isolator. You are in the right place. Our team went through about 46027 reviews available online for Battery Isolator. We chose the finest ones, and prepared this list for you.

Comparison Chart of Top 10 Battery Isolator

Best Battery Isolator
NoProductScoreAction
1Dual Battery Isolator Kit - HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit9.8Buy On Amazon
2KeyLine Chargers 12V 140 Amp Dual Battery Isolator Voltage Sensitive Relay (VSR) Pro Dual Battery Kit9.6Buy On Amazon
3RECOIL 500 Amp Mobile Audio Battery Isolator and High Current Starter Relay9.4Buy On Amazon
4Dual Battery Smart Isolator DEWINNER - VSR - Voltage Sensitive Relay9.2Buy On Amazon
5Stinger SGP32 200 AMP Battery Relay Isolator and Relay9Buy On Amazon
6Stinger SGP38 80-AMP Battery Isolator and Relay8.8Buy On Amazon
7MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator8.6Buy On Amazon
8WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator8.6Buy On Amazon
9250 AMP Dual Battery Smart Isolator Universal 12V/24V Voltage Sensitive Relay Intelligent Dual Battery Isolator for Car8.4Buy On Amazon
10Stinger SGP35 500-AMP Relay and Isolator8.2Buy On Amazon

Battery Isolator Reviews

We have checked about 46027 reviews for battery isolator. It was quite difficult to shortlist the ideal ones from thousands of variants online. However, we've tried our best to make sure that you get only the best one from our suggestions.

Table Of Content:

1. Dual Battery Isolator Kit – HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit

  • RUGGED DURABILITY -This dual battery isolator kit is all you need to charge a dual battery system.
  • 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.
  • 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.
  • BUY WITH CONFIDENCE – Every 140 Amp Dual Battery Isolator is Backed by an Industry Leading 12-month Warranty.

2. 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.
  • VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems.
  • RUGGED DURABILITY: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified.
  • 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.
  • BUY WITH CONFIDENCE: Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty.

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 Smart Isolator DEWINNER – VSR – Voltage Sensitive Relay

  • Easy to Install: No alternator or ignition connection needed.
  • VOLTAGE SENSITIVE RELAY: DEWINNER Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems.
  • FITS A WIDE VARIETY OF VEHICLES -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.
  • WHAT YOU GET: SingleIsolator: 140 Amp Smart Battery Isolator; Easy-to-follow directions for the novice DIYer.
  • BUY WITH CONFIDENCE: Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty.

5. 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

6. Stinger SGP38 80-AMP Battery Isolator and Relay

  • 80 AMP Battery Isolator and Relay
  • Prevents primary battery discharge.80A constant 150A peak
  • Maximum current transfer
  • Extends battery life
  • Universal 12V Applications

7. MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator

  • 12V, 140A, 13.
  • Working Voltage: Having Voltage Sensitive Chip,Rely Cuts in at 13.
  • 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

8. WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator

  • Water resistant (IP62) – suitable for marine use
  • Priority charging for starting battery
  • Automatically charges auxiliary battery
  • Manual override for starting battery
  • Over current and surge protected for vehicles with electronic systems

9. 250 AMP Dual Battery Smart Isolator Universal 12V/24V Voltage Sensitive Relay Intelligent Dual Battery Isolator for Car

  • 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.
  • 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.

10. Stinger SGP35 500-AMP Relay and Isolator

  • 500 AMP High Current Relay/Isolator
  • Prevents primary battery discharge
  • Power on demand
  • Extends battery life
  • Universal 12 volt applications

Battery Isolator Buying Guide


Does the thought of finding a great Battery Isolator stress you out? Has your mind been juggling between choices when it comes to buying Battery Isolator in general, specifically regarding which model to choose?
If that’s the case, know that you’re not alone. Many people find it tough to buy the perfect Battery Isolator for themselves. We understand the stress associated with the buying process!
Since you’re here, you are obviously curious about Battery Isolator Reviews. You’ve been bombarded with information, so you need to find a reputable source with credible options before you make any decisions on which product would be best for your needs.
There are many sources that’ll provide you with that information- buying guides or ratings websites, word-of-mouth testimonials from friends or family members, online forums where users share their personal experiences, product reviews specifically found all over the internet and YouTube channels. Only thorough research will ensure that you get the right product.
But that’s not always easy, right? That's why we've taken time to compile a list of the best Battery Isolator in today's market, on your behalf, so that there will be no more worries for you.
How did we come up with the list, you ask? How did we create this buying guide?
  • First, our algorithms collected as much information available about these products from trusted sources.
  • We employed both Artificial Intelligence and large data volume to validate all collected information.
  • Then our AI ranked them on their quality-to-price ratio using industry-standard criteria that let us pick the best Battery Isolator currently on the market!
The products aren’t chosen randomly. We consider several criteria before assembling a list. Some of the criteria are discussed below-
  1. Brand Value: What happens when you go for a not-so-reputable brand just because the price seems cheap? Well, the chance of getting a short-lasting product goes higher. That’s because the renowned brands have a reputation to maintain, others don’t.
Top Battery Isolator brands try to offer some unique features that make them stand out in the crowd. Thus hopefully, you’ll find one ideal product or another in our list.
  1. Features: You don’t need heaps of features, but useful ones. We look at the features that matter and choose the top Battery Isolator based on that.
  2. Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products of higher specifications, but with the right balance.
  3. Customer Ratings: The hundreds of customers using the Battery Isolator before you won’t say wrong, would they? Better ratings mean better service experienced by a good number of people.
  4. Customer Reviews: Like ratings, customer reviews give you actual and trustworthy information, coming from real-world consumers about the Battery Isolator they used.
  5. Seller Rank: Now, this is interesting! You don’t just need a good Battery Isolator, you need a product that is trendy and growing in sales. It serves two objectives. Firstly, the growing number of users indicates the product is good. Secondly, the manufacturers will hopefully provide better quality and after-sales service because of that growing number.
  6. Value For The Money: They say you get what you pay for. Cheap isn’t always good. But that doesn’t mean splashing tons of money on a flashy but underserving product is good either. We try to measure how much value for the money you can get from your Battery Isolator before putting them on the list.
  7. Durability: Durability and reliability go hand to hand. A robust and durable Battery Isolator will serve you for months and years to come.
  8. Availability: Products come and go, new products take the place of the old ones. Probably some new features were added, some necessary modifications were done. What’s the point of using a supposedly good Battery Isolator if that’s no longer continued by the manufacturer? We try to feature products that are up-to-date and sold by at least one reliable seller, if not several.
  9. Negative Ratings: Yes, we take that into consideration too! When we pick the top rated Battery Isolator on the market, the products that got mostly negative ratings get filtered and discarded.

These are the criteria we have chosen our Battery Isolator on. Does our process stop there? Heck, no! The most important thing that you should know about us is, we're always updating our website to provide timely and relevant information.
Since reader satisfaction is our utmost priority, we have a final layer of filtration. And that is you, the reader! If you find any Battery Isolator featured here Incorrect, irrelevant, not up to the mark, or simply outdated, please let us know. Your feedback is always welcome and we’ll try to promptly correct our list as per your reasonable suggestion.