#1.Keyline Chargers Dual Battery Isolator
If you are looking for the best dual battery isolator, we have to give it to the Keyline Chargers Dual Battery Isolator. This is a cheap and powerful product that is the perfect solution to a dead battery issue. We really like it because the price is very agreeable, the product itself is reliable, and the instructions are incredibly intuitive and clear.
Best Dual Battery Isolator
- #1.Keyline Chargers Dual Battery Isolator
- #2.JayCorp Smart Dual Battery 140A Isolator
- #3.DB Electrical Dual Battery Isolator
- #4.Standard Motor Products Dual Battery Isolator
- #5.WirthCo Battery Doctor Dual Battery Isolator
#1.Keyline Chargers Dual Battery Isolator
When it comes to the best dual battery isolator, we highly recommend the Keyline Chargers Dual Battery Isolator. It works pretty much spot on to what is described and is pretty easy to install as an amateur. We won‘t bog you down with the specifications so if you want to know about them, check out the link below. In general, we find that it works really great at keeping the aux battery charged.
The instructions are crystal clear and it really takes a dummy to mess it up. Overall we are very impressed with its performance and it is small and compact. It is the miracle solution to your dead battery issues. Finally, there are a few things to consider. The relay is loud and the terminal lugs are not closed on the ring end. Other than that it is very efficient and charges perfectly.
#2.JayCorp Smart Dual Battery 140A Isolator
Next, we have the JayCorp Smart Dual Battery 140A Isolator, which is the best dual battery isolator for those who want a smart isolator, with a dual sensing mechanism that senses the charge of both batteries. Although it is a bit more costly than your traditional diode isolators, it will do a much better job of saving your batteries. It works better than most in keeping your starter battery from being discharged.
Just keep in mind that this is a premium isolator which is a smart device that senses both batteries. If at least one is receiving a charge, it will enable the charging of both batteries. And finally, we just want to mention that the installation is incredibly quick and easy that you don’t need a professional to help you. Just be sure to follow the instructions exactly.
#3.DB Electrical Dual Battery Isolator
Another great option when it comes to the best dual battery isolator is the DB Electrical branded product. It is a great aftermarket unit that is built to fully meet OEM specifications. The pricing is pretty fair for a dual battery isolator of this quality and we really like the fact that it comes with a 1-year warranty to protect you from all defects.
In terms of efficacy and performance, we put it right up there with the previously mentioned brands. It will definitely save a dying battery and other dead battery issues. Of course, it goes without saying that you need to follow the instructions very clearly. We think the instructions are pretty clear so hopefully, you won’t have any problems here.
#4.Standard Motor Products Dual Battery Isolator
The Standard Motor Products Dual Battery Isolator is a great little dual battery isolator for those who want a reliable product but don’t want to pay too much. This dual battery isolator is DC volts 6-50 and has a max Amps of 95. While it is certainly not as well marketed as some of the previous brands we mentioned, we think it is just as good.
The only issue we have with it is that the instructions are a little confusing. If you are the type that can’t be bothered with trying to figure something out, this isolator is probably not for you. Additionally, we can’t say much about the long-term durability of this product as we have not run long-term tests on it. It is a bit of a gamble, but hopefully, it will pay off as it is cheaper.
#5.WirthCo Battery Doctor Dual Battery Isolator
Lastly, we have the WirthCo Battery Doctor Dual Battery Isolator. This dual battery isolator is water-resistant IP62, which also makes it suitable for marine use. We really like this isolator because it is a smart battery isolator, charger, and jump starter all in one unit. We think it offers tremendous value and will save you tons of money.
When installed, you can effectively run power into your secondary battery without affecting the main starting battery. Also, we think that the performance is quite reliable and the installation is quite easy. When compared to similarly priced products on the market and factoring in that you also get a charger and jump starter in this unit, we think that it is a really good bargain.