The simplest form of a dual battery system is two batteries wired in parallel (negative to negative and positive to positive). Read on as I explain the many ways of accomplishing this.Īnother example with both batteries running parallel to each other. Now that we have two batteries, we must find a way to charge them with one charging source, your alternator. It is an additional battery placed in the vehicle with the intended purpose of powering your auxiliary accessories. But what is it? How does it work? And, how do I know if I need one?Ī dual battery system is exactly what it sounds like. You hear a lot about it in the off-road and overland community. So, what do we do about it? Enter the dual battery system. In a similar way, after adding multiple accessories to your battery, it is taxed as much as your tires are in off-road conditions. Our tires take abuse in these situations and losing one would mean the end of the trip. Another reason could be that designing and installing a proper power system isn’t really the most exciting upgrade.Ĭonsider this: You wouldn’t head out on an epic road trip, off-road adventure, or overland adventure without a spare tire, would you? Of course not. Why do we choose to add all these fancy electronics without paying attention to what’s powering them? Simple oversight could be one reason. At the most, it can make for a dangerous situation.Īn example of a dual battery system cleanly laid out by utilizing the vehicle’s open space under the hood. At the very least, a dead battery is a major inconvenience. In Issue 20 of OutdoorX4, Brian Wurts of Overland Solar provided an overview on the various types of batteries to power your vehicle-based adventures and let’s be honest: Having additional accessories can enhance and maximize functionality and self-sufficiency while traveling, until your one and only battery source dies…in the backcountry… by yourself. What do all these accessories have in common? They need a power source. These accessories could include a portable fridge, additional lighting, CB and/or Ham radios, air compressors, winches, etc. You may already be preparing for these adventures by adding accessories to your vehicle that will make your trip more comfortable or enjoyable. It is safe to say that anyone reading this likes to venture into the backcountry from time to time, or is planning to do so at some point. REDARC are always here to answer any of your questions too.Dual battery systems and how they benefit your overland vehicle It comes with everything you need to install your isolator, so you can just plug in and play. If you need some help with the set up, check out REDARC’s Smart Start Battery Isolator and Wiring Kit. Not to mention, it features sophisticated fault detection and LED indication to warn the user of faults including over-voltage, voltage drop and excessive current draw conditions.Įasy to install and compact in size, REDARC’s isolators will suit all of your battery charging needs. The dual sensing model can also be used to isolate the start and auxiliary batteries in a system where the auxiliary battery is being charged by another source, such as 4WD solar panels. Microprocessor controlled, this dual battery isolator is designed to protect the start battery from excessive discharge while allowing the auxiliary battery to supply charge to non-essential loads. REDARC’s Smart Start (SBI) battery isolators prevent your secondary battery draining your main battery, so you can stay out on the road for longer.
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