Enhance your vehicle's electrical system with our Voltage Sensitive Automatic Charging Relay, a dual battery isolator designed for efficiency and reliability. This advanced relay ensures your batteries are charged optimally, providing peace of mind and superior performance. Seamless Integration The relay's dimensions are perfectly suited to fit the Heavy Duty Modular Fuse Box Series (BF43x) and Battery Switch. This compatibility ensures it matches most mainstream products in the market, making it an easy addition to your existing setup. Efficient Dual Battery Charging Designed to optimize your vehicle's charging system, this relay automatically begins charging a second battery once your main starter battery reaches a sufficient charge. This feature ensures both batteries are maintained effectively, maximizing their lifespan and reliability. Flexible Installation Options With both surface and panel mount options available, this relay provides the flexibility needed for various installation scenarios. Whether you're working with limited space or specific mounting preferences, this relay accommodates your needs effortlessly. Zero Voltage Drops Unlike traditional battery isolator diodes that experience voltage drops of 0.6V, this relay eliminates such losses. This ensures more efficient power delivery and better overall performance of your electrical system. Durable Construction Encased in a solid glass fiber reinforced nylon shell, this relay boasts exceptional durability. Its robust construction is designed to withstand harsh conditions, ensuring long-term reliability and performance. Upgrade your vehicle with our Voltage Sensitive Automatic Charging Relay and experience enhanced charging efficiency and reliability. It's the ideal solution for anyone looking to maintain optimal battery performance and extend the life of their vehicle's electrical components.