The 10 Best 12V Battery Isolators

Updated January 03, 2019 by Sam Kraft

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.

help support our research

patreon logoezvid wiki logo small

Last updated on January 03, 2019 by Sam Kraft

Sam is a marketing/communications professional and freelance writer who resides in Chicago, IL and is perpetually celebrating the Cubs’ 2016 World Series victory.

Thanks for reading the fine print. About the Wiki: We don't accept sponsorships, free goods, samples, promotional products, or other benefits from any of the product brands featured on this page, except in cases where those brands are manufactured by the retailer to which we are linking. For our full ranking methodology, please read about us, linked below. The Wiki is a participant in associate programs from Amazon, Walmart, Ebay, Target, and others, and may earn advertising fees when you use our links to these websites. These fees will not increase your purchase price, which will be the same as any direct visitor to the merchant’s website. If you believe that your product should be included in this review, you may contact us, but we cannot guarantee a response, even if you send us flowers.