The SmartStart® can be used with dissimilar battery types. The SmartStart® is ideal for installations that cannot tolerate the voltage drop associated with diode battery isolators. The SmartStart® features sophisticated fault detection and indication to warn the user of faults including overvoltage, voltage drop and excessive current draw conditions. When the system voltage drops below 12.7V the solenoid opens isolating the start battery from the auxiliary battery. The SmartStart® monitors the start battery voltage and when the start battery reaches 13.2V the SmartStart® connects the auxiliary battery to the charging system. Cost-effective protection against a flat battery.The Maximum inrush load rating for this model is 400 amp. The SBI12 model isolator has a voltage range of 9-15v and offers a 100 amp continuous load rating. The Redarc SmartStart ® is Australia’s most trusted dual battery isolator and is used by 4WD clubs throughout Australia. The Redarc SmartStart ® is designed primarily for use in 4WD and commercial vehicles. The Redarc SmartStart ® is a microprocessor-controlled battery isolator designed for use in multi-battery applications as a solenoid priority system, protecting the start battery from excessive discharge, whilst allowing the auxiliary battery to supply non-essential loads. If you are not sure what solution best suits your needs please feel free to call us on 1300 377 128 and our team will help you out.REDARC SmartStart® Dual Battery Isolator SBI12 12v 100A Not all DC-DC Chargers have a solar regulator built in. The DC-DC Charger is the most expensive option, however provides the most value, because it contains an isolator, solar regulator and DC-DC Charger. The ignition relay costs cheaper than a voltage sensitive relay and will work on vehicles with smart alternators. The Redarc SBI12 has this feature and instructions to setup. If you have a vehicle with a smart alternator you will need to override the switch by connecting the blue wire to an ignition source. To overcome this, a trigger based on the ignition switch has to be installed so that the DC charger knows when the vehicle is turned on or off.Ī manual isolating switch is the cheapest solution for a dual battery system but requires you to remember to manually turn on and off the switch.Ī voltage sensitive relay costs more than a manual isolating switch and automatically turns on and off the switch. When smart alternators increase and decrease the voltage it causes a Voltage sensitive relay (inside the Redarc DC Charger) to fluctuate which causes the DC charger not to charge correctly. If your vehicle has a smart alternator you will need to have a compatible DC-DC Charger like the Redarc BCDC1225D. This charger is a MPPT Solar Regulator (9V to 32V), isolator and 25 Amp DC-DC Charger in one unit. An example of this is a Redarc BCDC1225D charger. I gnition relay (isolating switch) which allows current to flow when the ignition is turned on with the key and prevents the flow when the ignition is turned off with the key.ĭC-DC charger which has a built in isolator. Thus the house battery can drain and not drain the start battery. ![]() When the vehicle is turned off, the alternator does not produce voltage and the relay disconnects the current flow between the start battery and the house battery. When the vehicle is running the alternator provides enough voltage to trigger the relay, which connects the start battery and house battery together. When the voltage on the input (start) is low enough the current is prevented flowing between the start battery and the house battery. When the voltage on the start side is high enough it will allow current to flow between the start battery and house battery. This device turns the isolating switch on and off when it detects a voltage on the input side (start). Voltage sensitive relay (isolating switch). ![]() If the house battery drains it will not drain the start battery. When the switch is turned off it prevents the current flowing between the start battery and house battery. The switch allows current to flow between the start battery and the house battery. There are many options for dual battery systems:
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