12V 120A Car Double Battery Isolator Protector Auto Dual Battery Controller Smart Battery Manager Max to 300A Main And Secondary Batteries Are Automatically Charged And De-energized

Auto Double Battery Protector :

It is suitable for dual battery systems such as RVs, off-road vehicles and cruise ships to solve the problems of charging and discharging the main and auxiliary batteries and borrowing electricity. 1. 12V~120A, Max 300A 2. Automatic connection voltage (delay 5 seconds): 13.2V 3. Automatic disconnection voltage (delay 5 seconds): 12.4V 4. The device is powered by 0.3A, powered off 0.01A 5. Size 85 * 58MM 6. Main functions: When the main battery is high, the auxiliary battery is automatically turned on for charging; when the main battery is low, the power to the auxiliary battery is automatically cut off to prevent the car from starting because the main battery is too low

Positive wiring diagram

Tips:

The main battery is lower and the battery is energized automatically, so that the main battery is low and the car cannot be started. When the main battery is higher, the sub-battery is automatically charged.

Negative wiring diagram

Tips for use

This equipment is automatically powered on and off, you could add a normal switch to the positive line of the device, so that can manually control the power of the device.

Voltage setting method

1. Under normal display, short press left button to display: P0 2. Press the middle button 1 to display: P1 3. Press the left button 1 to display: voltage number 4. Press the middle and right keys to adjust the power-off voltage 5. After adjusting, wait a few seconds to recover the battery real-time voltage. P0 should be f, P1 is recommended for power-off voltage 11.4 (representing 12.2V disconnect) P2 is recommended to restore the power supply voltage 13 (representing the main battery is greater than 13V to charge the secondary battery) Note: The power-on status digital display plus 0.7 is the battery real voltage. If you have any questions, please contact us.

Products real shot

Instructions for use

If the positive line of the device is connected to the main battery (the original car battery), then when the car is started, the voltage rises and the device automatically energizes and charges the sub-battery. When the engine is turned off, the battery voltage is high at the beginning of the stage. The primary and secondary batteries are still energized. When the secondary battery is used, the two batteries are powered at the same time. When the main battery voltage is lower than 12.2V, the equipment is disconnected, and the electrical equipment connected to the secondary battery only consumes the electricity of the secondary battery, ensuring that the main battery does not consume electricity and can start the car next time. The main and secondary batteries are automatically charged after the next car start.