Starting batteries should therefore be kept open circuit, but charged at least once every two weeks to prevent sulfation and a loss of capability. Starting batteries kept on a continuous float charge will suffer corrosion of the electrodes which will also result in premature failure. Repeated deep discharges will result in capacity loss and ultimately in premature failure. They have a large number of thin plates designed for maximum surface area and maximum current output, which can easily be damaged by a deep discharge. Starting Batteries: Meant to give momentary high-power bursts to energize the starting motors on big marine outboards. Additionally, battery technology can be divided into four basic categories – flooded cell lead acid, absorbed glass mat (AGM), Gel, and Lithium/Iron. There are a trio of functional battery types, specifically, Starting, Deep-Cycle and Dual Purpose. Prices for a standard group-24 series 12V power cell can range from $100 to $1,000 or more, depending on the battery type and technology. Not all marine batteries are created equal. This month’s focus is on 12V marine battery basics, along with some of the requisite accessories that are needed to make things happen onboard. T his system eliminates the possibility of draining the start battery and protects sensitive electronic equipment powered from the house battery from harmful engine start up spike.The one thing all of our fishing boats typically have in common is the reliance on some sort of 12-volt marine power cell to either start up the engine(s), run the electrical system, or both. When the voltage drops below 12.8 volts (eg the engine is stopped), the relay disengages, separating the batteries. When the engine is started and either battery reaches 13.3 volts, the relay engages, allowing two battery banks (start and accessory) to be charged simultaneously. How it works: The smart isolator allows two batteries to be charged at the same time. If placed in linear sequence between each battery the isolator units can provide proper charging for several batteries in a multiple battery setup such as in larger boats that may have 2 or more house batteries. This prevents problems that may result from your charging source being too low in amps to charge all batteries as once. The advanced technology always insures that the first battery is fully charged (13.3v) before connection is made to the second battery. a battery charger is connected to the auxiliary battery the relay will engage and charge both batteries. If either battery is receiving a charge, e.g. The smart isolator is also “Dual Sensing” which senses the charge of both batteries. The small size and rugged construction of these units allow for quick simple installation for even the most novice DIYer. These units can be installed between batteries with a common ground to automatically control the charging process to the batteries but continue to provide isolation when a charging source is unavailable. Positive Marine type battery clamp.įully automatic priority charging for main battery.ġ2V 140A isolator with Cut-In:13.3V, Cut-Out:12.8VĪ smart isolator is the ultra-simple and most technologically advanced method of automatic battery isolation. Perfect for “house” and starter battery applications in power-sports applications.Įspecially important for vehicles with winches, large stereo systems, cab heaters,light bars and accessories with large electrical demand.ġ2v 140amp Smart Battery Isolator with mounting screws.Ĩ.5 mm x 6000mm Red Cable with two 8x 5/16 connecters.ġ0mm x 600mm Black Cable with two 4x 5/16 connecters. This automatic relay distributes charging amperage between two batteries. Installation kit Specifically designed for RV & Boats. No alternator or ignition connection needed.When the engine is stopped and the battery voltage falls below 12.8 volts the VSR disengages separating the start and auxiliary batteries, at this point the indicator light will be out and the auxiliary battery continues to power any accessories without risk of draining the starting battery.This is indicated by the red light in the top LH corner being illuminated. When the charge voltage reaches 13.3 volts the Voltage Sensitive Relay engages allowing both starting and auxiliary batteries to be charged. When the engine is started, starting and auxiliary batteries are separated allowing only the starting battery to be charged.The battery isolator is surge protected, keeping your vehicle and battery safe from unexpected surges. You can use it with your 4WD, marine vehicle, truck, caravan, or for camping applications. If you need to isolate your vehicle's starting battery from its auxiliary battery, this SCA dual battery isolator kit is an easy to install option.12V, 140A, 13.3V cut-in voltage, 12.8V cut-out voltage, Suitable for 12V 4WD, marine, truck, caravan & camping applications.
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