Ampper Battery Disconnect Switch 12V-48V | Marine, Car, RV & Boat Power Cut Off Kit

Reliable DC power isolation for cars, boats, and recreational vehicles

The Ampper Battery Disconnect Switch is a compact, rugged master switch designed to safely isolate your electrical system when a vehicle or vessel is not in use. Built for DC 12–48V applications, it helps prevent battery drain and provides a clear on/off control for easy power management. The unit combines durable materials with practical design to support everyday setups, from cars and campers to sailboats and workboats.

Crafted with a tough ABS plastic housing and a rear cover that insulates terminals against accidental shorts, this switch prioritizes safety while remaining straightforward to install. Its 2-position On/Off operation lets you quickly cut or restore power, helping you manage electrical systems without hassle. The kit includes everything you need to mount and connect the switch, making it a convenient choice for both standalone use and modular configurations with other switches.

Key design features

• Heavy-duty housing and insulated rear cover to reduce the risk of short circuits during installation or use.
• On/Off 2-position operation for simple, immediate control of the electrical system.
• Copper terminal studs with nuts and washers for strong, reliable connections.
• Four mounting screw holes enable flexible placement in tight spaces on vehicles or vessels.
• High current ratings at DC 12V: 275 A continuous, 455 A intermittent, and 1250 A momentary, with compatibility up to 48V systems.
• Can stand alone or be locked together with other switches for expanded configurations.
• Designed to eliminate parasitic power draw when not in use and to disconnect the battery safely.
• Universal applicability for Car, RV, Boat, and other DC electrical equipment.

Two practical use scenarios

When a boat is moored for longer periods, you can switch off power to reduce engine bay drain and avoid unintended battery discharge. For a weekend RV trip, you can quickly disable the electrical system after parking, then restore power with a single flip before departure. These options offer straightforward control without requiring tools or extended setup time.

What’s included in the complete kit

• 1 x battery switch
• 4 sets of mounting bolts
• 4 x 2x3/8" copper lugs
• A wrench
• 4 x heat shrink tubing

Overall, the Ampper battery disconnect switch blends practical features with a simple installation path. It’s a sensible component for keeping your electrical system organized, accessible, and ready for action when you need it. While results may vary by setup, many users appreciate the clarity, ease of use, and the peace of mind that comes with reliable power control.