Heavy-Duty Battery Solution for 12-48V DC systems. This unit is built to handle up to 300A continuous current with 1000A intermittent current, providing total electrical system isolation for boats, RVs, and vehicles. It prevents standby power loss during extended non-use and offers essential overcurrent protection. Key benefits and features - Reliable isolation and protection: reduces standby power draw and guards the electrical system against overcurrents. - Wide compatibility: designed for 12-48V DC systems and capable of 300A continuous and 1000A intermittent current. - Flexible use: modular design supports simple function or secure locking with multiple keys for expanded configurations. - Durable construction: all-aluminum housing with bright chrome plating, resistant to corrosion, extreme temperatures, moisture, and harsh conditions while shielding internal components. Complete installation kit - Includes key and faceplate, 2 rubber terminal insulators, 2 copper 3/8-inch lugs, and 2 heavy-duty heat shrink tubes for proper insulation and dependable high-current connections. 2-3 practical use scenarios - Marine applications: isolate the house battery bank to prevent standby draw during long sea passages while providing robust overcurrent protection. - RV and overland setups: quickly disconnect high-current accessories or critical systems to protect the battery and wiring when parked or in storage. - Off-grid or solar installations: suitable for 12-48V systems that require high-current disconnects with secure locking options and reliable performance in demanding environments.