Battery Disconnect Switch — Fully Enclosed 12–48V, 275A Continuous / 1250A Max Key benefits — why you need it Prevents battery over-discharge and reduces parasitic drain when vehicles are parked, extending battery life and avoiding unexpected no-starts. Provides a secure, visible way to isolate power for maintenance or storage so you can work safely and avoid accidental shorts. Built for harsh environments: fully enclosed design and corrosion-resistant connections keep the switch reliable in marine, off-road, and outdoor applications. What makes it stand out Fully enclosed ABS plastic housing protects internal components from dust, water, and oxidation for long-term reliability. Copper-plated studs deliver stable, low-resistance connections that resist corrosion under heavy use. Simple 2-position turn operation with clear color-coded status: red = OFF (open circuit, clockwise), green = ON (closed circuit, counterclockwise). Key features and performance Voltage range: DC 12–48V — suitable for common vehicle and marine electrical systems. Continuous current rating: 275A; maximum surge rating: 1250A for high-start-current events. Short-term load capability: rated for 455A for 5 minutes to handle temporary heavy loads. Two-position rotary switch: clockwise to open (disconnect), counterclockwise to close (connect). Color-coded labels (red/green) for quick, unambiguous status checks. Includes bolts and nuts for fast installation and secure clamping to battery terminals; design resists loosening from vibration. Compatibility and installation Compatible with RVs, boats, trucks, ATVs, campers and similar DC 12–48V systems. Installs in minutes using the included hardware; places between battery and load to isolate the entire DC circuit. Secure fastening prevents accidental disconnection in high-vibration environments commonly encountered on boats and off-road vehicles. Practical use scenarios Winter storage for an RV: switch to OFF to eliminate parasitic draw from alarms, chargers, and electronics, preserving battery health over months of inactivity. Marine maintenance: isolate the battery before servicing bilge pumps or electronics to work safely without disconnecting terminal clamps repeatedly. Off-road or expedition vehicle: quickly cut power to reduce drain while parked, and rely on corrosion-resistant connections and a sealed enclosure when exposed to mud, water, and dust. Materials and reliability ABS plastic enclosure for impact resistance and environmental protection. Copper-plated studs for improved conductivity and corrosion resistance. Built and rated for continuous and surge currents to match common automotive and marine electrical demands. What you get Fully enclosed battery disconnect switch with copper-plated studs, color-coded ON/OFF indicator, and included bolts/nuts for installation. A straightforward, durable solution to protect batteries, simplify maintenance, and control power in 12–48V DC systems.