![]() It’s almost as simple as placing the unit. Moreover, installing a diode isolator is pretty simple because there are no moving parts. That lets you connect with the secondary battery without having to discharger your starter. A diode isolator is positioned between your alternator and your batteries, and the built-in diodes let your alternator charge those batteries while keeping them both isolated from each other. Each have their own advantages and disadvantages. ![]() You’ll have to choose between diode isolators or relay isolators. Systems with more robust batteries should take advantage of equally robust supporting equipment. Though you can find more powerful kits for niche scenarios, most people will be well-suited by almost any properly constructed battery isolator. For the better battery isolators on the market, these typically range between 120A and 150A. You want isolators rated to carry the amount of voltage and amperage you expect to draw. Different batteries have different needs. Isolation aside, different vehicles have different batteries. Seemingly simple features, like start isolation, can ensure that your sensitive electronics won’t be subjected to the kind of sags in voltage that may occur when engine cranking happens. ![]() Expanding beyond two batteries isn’t only prohibitively expensive, it’s totally unnecessary in most circumstances. But for someone seeking a simple two battery solution, what you’re looking for is a dual battery isolator. If you’re planning on running a giant battery bank, filled with hundreds or thousands of batteries, then you’d need a pretty impressive isolator. Luckily, it’s not that tough to choose an effective battery isolator. You don’t want your battery isolator to cause problems with your vehicle’s electrical systems, or with the devices connected to whatever local grid you’re working on. Perhaps more importantly, ending up with the wrong detector could be more trouble than its worth. The local auto parts stores around here don't have this size crimp connector, so I got mine from Crutchfield's web site, they are available in 2 hole sizes 5mm and 8mm, the small ones fit the #10-32 studs on the Camco's and the big ones fit the larger terminals on the isolator.Choosing the Right 12V DC Dual Battery Isolator On another note, our Dolphin's got a 4 gauge wire from the truck batt to the isolator and #4 also from the isolator to the house battery. The Amps for these vary from 10 to 50 in 10 Amp steps, both styles. That # is the number for the plastic body straight mount type, If you search around Amazon does sell the metal cased side mount ckt breakers with a different Camco # and a picture of the plastic straight-mount kind!!! A side note to get the free shipping from amazon you must bump up the dollar value, I got the Camco ckt breakers from them also to get the free shipping.One note on that, Camco makes 2 types of the breakers and on Amazons web site the PICTURES are wrong on all their pages!!!! the description matches the Camco part#, matches what you will get but the picture on that same Amazon web page further down shows the metal cased side-mount ckt breaker but the description says"Camco 65224 30 Amp 1/Card Straight Mount Ckt Breaker". Yes that's the good one, don't get the $10.00 cheepo from some web sites. I was testing it, with the headlights letting it go on and off really quick and it stopped working.
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