Updated January 03, 2019 by Sam Kraft

The 10 Best 12V Battery Isolators

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Best High-End
Best Mid-Range
Best Inexpensive

We spent 21 hours on research, videography, and editing, to review the top options for this wiki. If you own a truck, boat, RV or ATV that uses dual batteries, you may have noticed that when one of them drains or fails, it negatively impacts the performance of the other. These 12-volt isolators will allow you to charge both batteries simultaneously so that ancillary features, like car stereos and complex navigation equipment, don’t decrease your battery life. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best 12v battery isolator on Amazon.

10. Audew Master

9. Zoostliss Power

8. PAC 200

7. Metra Electronics Install Bay

6. Aopec Caravan

5. Ehdis Relay

4. JayCorp Dual

3. Stinger SGP38

2. WirthCo 20092

1. KeyLine Smart

Editor's Notes

January 02, 2019: While the Zoostliss Power isn’t constructed to handle a ton of current, reports indicate that it’s an ideal choice for light duty that provides remarkable value. A few models — such as the JayCorp Dual and KeyLine Smart — are designed with advanced technology that enables them to monitor the voltage of each battery individually to prioritize which requires focus for charging.


Sam Kraft
Last updated on January 03, 2019 by Sam Kraft

In addition to his corporate career as a marketing and communications professional in Chicago, Sam runs a popular blog that focuses on the city’s flourishing craft beer and brewery scene. He received his degree in journalism from DePaul University (which spurred his interest in freelance writing) and has since spent years developing expertise in copywriting, digital marketing and public relations. A lifetime of fishing, hiking and camping trips has left him well-versed in just about any outdoors-related topic, and over several years spent working in the trades during his youth, he accumulated a wealth of knowledge about tools and machinery. He’s a travel junkie, a health and fitness enthusiast, and an avid biker.


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