- Purpose: The KeyLine Voltage Sensitive Relay is specifically engineered for dual battery systems, perfect for Acid Lead batteries (not suitable for Lithium batteries). It enables effective charging and isolation between two separate power sources using a single alternator. - Voltage Management: The KeyLine Automatic 12V 140 Amp Dual Battery Isolator features a Voltage Sensitive Relay (VSR) that activates at 13.3 volts and deactivates at 12.8 volts. This ensures that your primary battery remains charged and ready for operation, preventing unexpected breakdowns. - Advanced Features: This dual power isolator utilizes an imported power management chip for intelligent and automatic circuit management. Its strong waterproof design, combined with low energy loss, good heat dissipation, and high efficiency, guarantees reliable performance in various conditions. - Compatibility: Ideal for DC 12V dual battery systems, this isolator is compatible with a wide range of vehicles and applications, including cars, RVs, ATVs, UTVs, and boats. It's the perfect solution for anyone needing to manage multiple battery systems efficiently. - Practical Applications: - Use it in RVs to maintain your starting battery while powering additional accessories. - Ideal for boats, ensuring your navigation and communication batteries remain charged while using the engine battery. - Perfect for off-road vehicles like ATVs and UTVs, allowing you to run multiple accessories without draining the main battery. With its combination of functionality, compatibility, and cutting-edge technology, the KeyLine Voltage Sensitive Relay is an essential tool for anyone managing dual battery systems.