12-24V Knife Blade Main Switch with post terminals designed for battery switching and power isolation in vehicles and boats. It provides quick on/off control to connect or disconnect the main battery and to isolate power for safety and maintenance. - What it does: Acts as a battery switch and power isolator for 12/24V electrical systems in cars, trucks, boats, and other vehicles. - Why you need it: Enables fast power disconnection to prevent parasitic drain, protect sensitive equipment, and simplify servicing. - Compatibility and size: Suitable for standard 12/24V vehicle and boat wiring systems; features a post terminal design for straightforward wiring. - Performance: Built for reliable, repeatable operation to maintain clean isolation of circuits during use, storage, or maintenance. - Installation notes: Post terminals allow direct wiring with common lugs; no special tools required beyond standard electrical hardware. - Use scenarios: 1) Boat winterization: disconnect the battery to prevent discharge during storage. 2) RV or off-grid setups: isolate the battery bank when not in use. 3) Vehicle service work: safely disconnect main power during electrical repairs. This knife blade main switch provides clear, dependable control of 12/24V power, helping protect your electrical system and simplify maintenance on both marine and automotive applications.