MOTOFLEX Battery Disconnect Switch 12V–48V 300A Side‑Post — Red Removable Knob, Corrosion‑Resistant

The MOTOFLEX ON/Off Battery Disconnect Switch is a compact, heavy‑duty manual cutoff that isolates 12V–48V systems up to 300A continuous (900A crank) to prevent parasitic drain or act as a theft deterrent.

This slim, side‑post style switch fits tight engine bays, marine consoles, RVs, trailers and golf carts where space is limited. Built with tin‑plated copper terminals and a PA66 housing, it provides corrosion resistance and high current capacity while allowing a removable knob to lock out unauthorized use. Install hardware and a simple guide are included so you can wire it on the negative or positive side depending on your setup.

How does this switch protect my battery when a vehicle is parked?

Flipping the MOTOFLEX disconnect physically breaks the circuit between the battery and vehicle accessories, halting all parasitic current draw. That prevents slow discharge while your boat, RV or car sits unused and helps preserve battery life between uses.

• Stops phantom drains from alarms, stereos, and modules
• Mechanical open/close action—no electronics to fail
• Works on 12V to 48V systems for versatile use

Can I use this in marine or outdoor environments?

Yes — the switch uses marine‑grade tin‑plated copper terminals and a rugged PA66 housing rated for wide temperatures, making it suited for boat and outdoor power environments. The materials resist corrosion and hold up to exposure common in marine and off‑road applications.

• Waterproof terminal design for wetter conditions
• Corrosion‑resistant plating for longer service life
• Temperature range from -40°F to 284°F for varied climates

What are the electrical limits and physical size constraints?

The disconnect handles up to 300A continuous current and 900A crank amps with a maximum of 48V DC. Its compact height of about 1.5 inches makes it ideal for tight engine compartments, but you should check local clearance before mounting.

• 300A continuous / 900A crank amp rating
• Fits GM side‑post, M8 AGM, and similar battery types
• Compact footprint for space‑limited installations

How secure and user‑friendly is the control knob?

The large red knob is easy to turn for quick operation and is removable to prevent unauthorized switching. Removing the knob effectively locks the switch in its current state until reinstalled, offering a simple mechanical security option.

• Removable knob to deter tampering
• Easy‑to‑grab design for gloved use
• Quick disconnect action for routine storage or maintenance

Who is this for: The MOTOFLEX battery disconnect is aimed at owners and technicians of cars, trucks, boats, RVs, trailers, golf carts and other 12V–48V equipment who need a reliable, space‑saving manual cutoff. It suits anyone who wants to stop battery drain during storage, add a theft deterrent, or install a heavy‑duty mechanical isolation switch where ruggedness and corrosion resistance matter. Note: this is a manual power cutoff; devices that keep memory when power is removed (such as radios) will lose settings when the switch is opened.