MOTOFLEX ON/OFF Battery Disconnect Switch 12V-48V | 300A Heavy-Duty Side-Post Kill Switch

Overview

Meet the MOTOFLEX ON/OFF Battery Disconnect Switch, a compact, corrosion‑resistant control designed to safely isolate a 12V–48V electrical system when it’s not in use. Its sturdy, mechanical action lets you flip the red knob to cut power quickly, helping prevent parasitic drain and providing a straightforward theft-deterrent option without relying on electronics.

Durability and environment-ready design

Built for demanding environments—from busy engine bays to marine decks—the switch uses a rugged PA66 housing rated for temperatures from -40°F to 284°F. Marine‑grade tin‑plated copper terminals resist corrosion while maintaining solid conductivity, so connections stay dependable even in challenging conditions. At about 1.5 inches tall, it fits tight spaces where space is premium.

Key specs at a glance

• 300 A continuous current with up to 900 A crank amps; 48V DC max.
• Corrosion‑resistant marine‑grade terminals for reliable connections.
• Removable red knob to deter unauthorized use and simplify maintenance checks.
• Negative-side installation is recommended; positive-side install is possible with adequate clearance.
• Included hardware: install guide, disconnect switch (3/8" terminals), 2x 5/16"‑18 bolts, 2x 3/8"‑16 bolts.

Practical uses and benefits

• Prevents parasitic battery drain when equipment isn’t in use across GM side-post, marine, RV, and other 12V–48V systems.
• Functions as a cut-off between batteries and accessories or between multiple power sources, simplifying wiring and safety.
• Designed for quick operation: flip the large red knob to disconnect power without tools.
• Compact form factor helps keep installations tidy in restricted engine bays or compartments.

Note: powering off the battery will cause non-volatile electronics that store memory, such as radios, to lose stored settings.

Compatibility and installation tips

Mount on the negative side for standard wiring, and verify clearance before installation. This switch supports cars, trucks, RVs, boats, golf carts, jet skis, and other 12V–48V systems, making it a versatile choice for many configurations.