![]() ![]() The most common reason to install a battery isolator is to prevent the secondary batteries from draining the starter battery. We alluded to some of these reasons already, but let’s look at them in more detail here. There are several reasons why you might want to install a battery isolator in your vehicle. The diode battery isolator is the most commonly used, so that is the one we will discuss in this article. Diode battery isolators, on the other hand, are less complicated and have a longer lifespan, using only two high-current diodes on the isolator to get the current to move to the battery. It utilizes many relays to manage the electrical current. The solenoid battery isolator is a bit more complicated. There are two kinds of battery isolators: solenoid and diode. You can even get smart isolators that are microprocessor-controlled. Not only does a single direction of current prevent the batteries from draining each other, it also protects the batteries from being damaged by voltage spikes, which we will discuss in more detail later. It does this by using a series of diodes that only allow current to flow in one direction. Said in another way, it is a device that lets you charge multiple batteries from one alternator. A battery isolator is a device that prevents electrical current from flowing between two batteries. Conclusion to How to Wire a Battery Isolatorįirst, let’s talk about what a battery isolator is.
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