Feature: 1. Flexible Design: LED display, real time monitoring of two battery voltages. If the engine cannot be started with the primary battery, simply press the emergency button to turn on the auxiliary battery to start the engine. 2. Smart Isolation Connection: Support automatic connection voltage (delay 5 seconds) 13.5V‑16V (12V working voltage), 27V‑32V (24V working voltage), and automatic disconnection voltage (delay 5 seconds) 12.5V; overvoltage 16V/32V . 3. Reliable to Use: 200 amp dual battery isolator ensures the main battery is always charged and ready to start the vehicle. It's like having two separate power sources for each battery and only one alternator. 4. Wide Application: Small design, voltage sensitive relay can be widely used in various vehicles such as 12V 24V cars, trucks, RVs, ATVs, UTVs, boats, vans, SUVs, caravans, camping applications. 5. Easy Installation: The dual battery isolator is easy to use, only the power cord is needed. Pure copper terminal, easy to connect. Four fixing holes for easy installation. Specification: Item Type: Dual Battery Isolator Material: ABS+Copper+Metal Working Voltage: 12V-24V Rated Current: 200A Application Introduction: Some vehicles usually need to be equipped with secondary batteries to meet the needs of appliances. However, the secondary battery cannot be directly connected in parallel with the original vehicle battery. Power outages may cause the original car battery to run out of power, making it difficult to start the car. On the other hand, when two batteries are charged together, the line is heavily loaded. Therefore, a battery isolator is required. A battery isolator, also known as a split charging relay, uses the vehicle's power to charge the auxiliary battery and prevents the starter battery from being drained by the device when the engine is off. The auxiliary battery isolator will only allow the extra battery to charge at whatever rate the alternator can manage. Applicable Models: Dual battery systems such as cars, RVs, ATVs, UTVs, campers, trucks, boats, etc., to solve the problem of main and auxiliary battery discharge problem. Package List: 1 x Dual Battery Isolator16 x Accessories1 x Manual