The most comprehensive line of Battery Isolators on the market. A battery isolator is a device that typically runs between a starter battery and a secondary battery.More efficient and reliable than mechanical or solenoid systems.Sold-State Electronics : Isolates each battery circuit and allows each battery to discharge and charge according to its own needs.Perform as well or better than existing factory installed compnents.Eliminate multi-battery drain when two or more battery banks are in a charging system.The Original, not an imitation! The Battery Isolator was 'invented' by Sure Power Industries in 1959!.They are more efficient and reliable then mechanical or solenoid systems, and have the reputation as the most comprehensive line of Battery Isolators on the market.įor optimum system performance it is recommended that a battery labeled "Deep Cycle" be used in the auxiliary position. Specifically designed to exceed OEM Specifications, they are equipped with Solid-State Electronics, which isolate each battery circuit and allows each battery to discharge and charge according to its own needs. They perform as well or battery then existing factory installed components. Multi-Battery Isolators are used to eliminate multi-battery drain when two or more battery banks are in a charging system. Sure Power Multi-Battery Isolators are the original Battery Isolator, and still the best on the market. Make sure you choose a modern FET battery. Diode-type battery isolators are a lower cost alternative that is fraught with compromises, but still used in OEM installations to save a few dollars.1203 Sure Power Battery Isolator 120 Amp | 1-Input, 3-Output | Multi-Battery Isolator | Group 1 Select your battery isolator based on the alternator max amperage and the number of battery banks to charge. What Is A Battery Isolator A battery isolators primary role is as sort of a traffic cop for your battery system. Companies like Balmar, Blue Sea Systems, Charles Industries, Newmar, West Marine and Xantrex all produce suitable battery combiners today. They have minuscule amounts of voltage drop and do not generate the heat levels that the diode-type isolators do. The bottom line here is that today, a modern solid-state battery combiner is the best way to go for this application.
All diodes used in electronic systems have an inherent loss of electrical voltage as current passes through them, typically about 0.6-0.7 volts, described by techies as “voltage drop.” This can adversely impact the efficiency of a boat’s battery-charging system depending upon how the installer connects the isolator into the circuit. Yet another drawback of the diode-type alternators is that diodes have a troubling little electrical nuance that can create some interesting problems with modern charging systems for batteries.
#MULTI BATTERY ISOLATOR INSTALL#
Often boat owners install higher output alternators and forget that if a diode type isolator is installed (quite often), then it may also have to be upgraded to match the higher amperage output of the new alternator. These devices all have to be rated to handle the maximum amount of amperage the system alternator is rated for. Another cause for failure with these diode types is amperage rating mismatch. That said, one of the most common causes of failure for diode type isolators is that they get mounted in a location on the boat (like engine rooms) with inherently high temperatures and/or poor air circulation. The diodes used to facilitate electrical isolation of one battery from another generate a significant amount of heat that must be radiated away by those cooling fins to prevent the diodes from burning out, causing component failure. First of all, the finned case as shown is important because these isolators get quite hot when they are in operation. Diode-type battery isolators definitely have some disadvantages compared to the more modern electronic battery combiner devices available to us today. But to your question, they are not necessarily the best choice for modern systems. This device has been a mainstay in battery systems on boats for the last 40 years or so. Designed to be used in multi-battery applications as a solenoid priority system, these isolators protect the primary battery from excessive discharge, while allowing the auxiliary battery to supply non-essential loads and accessories. Answer: You’re quite right, the device in the photo is indeed what is known as a diode-type battery isolator. Adventure further and for longer with REDARC dual battery isolators. Diode-type isolators like this one have drawbacks compared to more modern solid-state units.
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