Many vehicles have multiple batteries: one to start the engine and others to power accessories. Without a battery isolator a battery with a lower charge will rob power from a battery with a higher charge, until the batteries equalize. This problem is known as multiple battery drain and could leave you with dead batteries.
To eliminate the multi-battery drain problem, a battery isolator acts as a check valve between the batteries, preventing the current from flowing from one battery to another. Each battery is isolated and acts as an independent power source. So no matter how drained your accessory batteries become, they will never drain power from the battery you’re depending on to start your engine.
When the alternator is charging, current can only flow from one direction, from the alternator to the batteries. Each battery then determines the amount of current which flows into it by its own state of charge based on the voltage regulator setting.
With this system, the alternator is protected, the batteries are protected. The balanced circuit electronic isolator is the absolutely the best way that proper isolation and control can be accomplished, solving every multi-battery drain problem.
Intelligent battery monitoring to prevent unwanted switching
Some battery isolators will disconnect a battery in case of a short but high amperage load. A battery isolator also may fail to connect a large but discharged battery bank because the DC voltage immediately drops below the disengage value once the batteries are connected. The battery isolator does more than simply connect and disconnect based on battery voltage and with a fixed time delay. The battery isolator looks at the general trend (voltage increasing or decreasing) and reverses a previous action only if the trend has reversed during a certain period of time. The time delay depends on the voltage deviation from the trend.
No voltage loss
The battery isolator is a microprocessor controlled heavy duty relay that automatically connects batteries in parallel when one battery has reached a preset voltage (indicating that the battery is being charged), and disconnects when the voltage decreases below float level (indicating that one or both batteries are being discharged).
TYTXRV battery isolators are an excellent replacement for diode isolators. The main feature is that there is virtually no voltage loss so that the output voltage of alternators or battery chargers does not need to be increased.
Prioritising the starter battery
In a typical setup the alternator is directly connected to the starter battery. The accessory battery and other batteries are each connected to the starter battery with battery isolators. When the battery isolator senses that the starter battery has reached the connect voltage it will engage, to allow for parallel charging of the other batteries.
Bidirectional voltage sensing and power supply from both batteries
The battery isolator senses the voltage of both connected batteries. It will therefore also engage if for example the accessory battery is being charged by a battery charger.
The battery isolator has a dual power supply. It will therefore also close if the voltage on one battery is too low to operate the isolator.
Parallel connection in case of emergency (Remote boot switch)
The isolator can also be engaged with a push button or a switch to connect batteries in parallel manually. This is especially useful in case of emergency when the starter battery is discharged or damaged.
How to operate: Press the emergency boot button on the battery isolator for above 3 seconds, when the indicator light is on, the button can be released, now the main and auxiliary batteries are connected. After 60 seconds, the isolator will enter the automation mode without further manual intervention.
An inching switch (not supplied) can be installed at a proper location wired from the battery isolator’s remote control connection cord (supplied).
INSTALLATION (Refer to the attached wiring diagram)
The isolator can only be used in 12V or 24V installations with a negative common. It can automatically adjust to a 12V/24V system.
+ Proper and correct connections and safety features must be followed according to local applicable regulations.
+ Use suitable sized cables and connectors and keep the cable connections as short as possible.
+ Use reliable terminals and torque the bolts tightly.
CAUTION! Isolator ratings must be equal or greater than alternator amperage rating.
CAUTION! DO NOT INSTALL IN THE PRESENCE OF RUNNING ENGINES OR ANY BURNING MATERIAL.
1. Disconnect the wires from the negative pole of the two batteries.
NOTE: FOLLOW VEHICLE MANUFACTURER’S RECOMMENDATIONS FOR DISCONNECTING BATTERY.
2. Mount the isolator in a convenient location near the main battery bank and away from any sources of heat, allowing for proper ventilation. Never mount directly on the engine.
3. Cut one 20mm2 red wire of suitable length and terminate each end with a suitably sized ring lug connector. Run the red wire from the main (start) battery positive pole to the isolator’s positive A pole.
4. Cut another 20mm2 red wire of suitable length and terminate each end with a suitably sized ring lug connector. Connect the red wire from the auxiliary battery positive pole to the isolator’s positive B pole and install a properly sized fuse in the wire between the battery and the isolator.
5. Use a wire of suitable length to connect the auxiliary battery negative pole to the chassis (ground) of the car.
6. Connect the isolator’s ground cable (supplied) to the chassis (ground) of the car.
7. In the automation mode, when both batteries’ voltage is lower than 10V, the isolator will not start function. When either battery’s voltage is zero, the isolator will disengage to effectively protect the alternator and the circuit.
8. When first powered, the indicator light will flash for 6 seconds before entering the normal working mode. When engaged, the indicator light will always be on. When separated, the indicator light will flash once every 5 seconds; when ready to engage, flash twice every 5 seconds; when ready to isolate, the indicator light will be dark twice every 5 seconds.
TYTXRV develops a full series of intelligent battery isolator products with rated currents ranging from 80A to 1500A, suitable for cars, yachts, RVs, SUVs, special devices, solar energy bases, ships and flights.
Input voltage: 9-36V
Continuous pass-through current: Refer to Isolator’s rated current
Peak current: Double of Isolator’s rated current (30 sec)
Connect voltage (Delay 2 min): 13/26V
Connect voltage (Delay 1 min): 13.8/27.6V
Disconnect voltage (Delay 5 min): 12.8/25.6V
Disconnect voltage (Delay 20 sec): 11.8/23.6V
Press 3 sec to close the remote switch: Disconnection in 60 sec
OVP voltage (No Delay): 16/32V
Idle current consumption: <30mA
Production level: IP54
Weight: 0.6 kg
Dimensions: 110x100x55 mm
Included in package: 1x Battery Isolator