Battery Master Switches

Two models of marine battery switches for different needs: a compact 100A disconnect offers a convenient solution for small boats and auxiliary circuits, while a robust 300A switch is designed for the main power on larger engines and yachts. Both isolators reliably cut off battery power, featuring durable housings and handy removable keys for security.

• 100A mini switch: Small form factor, 100A rated (150A surge), perfect for isolating individual loads or as a secondary cutoff; includes a red rotary key that can be removed
• 300A master switch: High-amp (300A continuous, up to 450A surge) for primary batteries – handles starting currents of powerful engines; large removable key for easy operation
• Corrosion-resistant construction – plastic housings built for marine use, with copper internal contacts for minimal voltage drop
• Easy installation on a panel or battery box – both models share a similar design with mounting holes and heavy-duty terminal studs (M6 for 100A, M10 for 300A)
• Enhanced onboard safety – eliminates parasitic drains; prevents devices from energizing during maintenance and guards against accidental engine start-ups

A heavy-duty master battery disconnect switch designed to cut off your boat’s power supply for safety or storage. It features a removable red key that prevents unauthorized engine starts and acts as an anti-theft measure. A protective cover is included to seal the switch opening when the key is removed, keeping moisture and dirt out. Rated for up to 200A continuous (300A peak), this battery switch is ideal for medium to large vessels.

• Rated current: 200A continuous (up to 300A briefly) – handles engine starter loads with ease
• Bright red removable key – clearly indicates when the circuit is off; can be taken out to prevent accidental or unauthorized reconnection
• Durable plastic housing (impact and corrosion-resistant) with internal copper contacts for minimal voltage drop
• Protective rubber cover to shield the keyhole when the key is removed – prevents water, dust ingress and corrosion of the mechanism
• Easy installation – compact size for dash or battery box mounting; standard M10 terminals accommodate heavy-gauge battery cables

A universal marine battery cut-off switch for disconnecting a single battery – suitable for all boats, RVs, and systems. This robust switch handles 275 A continuous and momentary surges up to 1250 A, making it a reliable choice for isolating your electrical system. Its compact design and removable knob make installation and operation easy.

• Type: Single-circuit ON/OFF disconnect switch for full battery isolation
• Load: 275 A continuous, up to 1250 A momentary (cranking surge)
• Security: Lets you isolate the battery, preventing leaks and unwanted discharge
• Feature: Can double as an anti-theft device – features a removable key/knob (on some models) for extra security
• Mounting: Flexible mounting options (surface or flush); includes necessary nuts and washers for cable connections

Surface-mount marine battery isolator switch with a removable key for security. Supports high current (300A continuous) for efficient power cut-off or activation of a single battery. Compact design with cable outlets on all four sides for flexible installation.

Dual battery selector switch with 4 positions (OFF–1–2–BOTH) for 12/24V systems. Allows use of one or both batteries or complete shut-off. Continuous duty 100A (up to 300A surge) – ideal for small to mid-sized boats. Sturdy ABS housing with copper terminals and a secure knob ensures reliable, safe battery management.

Intelligent dual-battery switch that automatically combines or isolates two batteries based on charge voltage (Voltage Sensitive Switch). Ensures optimal charging of a second battery bank (12/24V systems) and includes a manual Emergency Parallel function for emergency starts. Rated 275A continuous (455A peak). Can be surface or flush mounted.

High-quality dual battery selector “Selecta” series. Four-position rotary switch (Off / 1 / 2 / Both) for systems up to 32V. Rated 175A continuous (300A short cranking). Durable bakelite body with removable knob (with safety lock) and heavy-duty 10mm studs. CE certified (meets 94/25/CE). Ideal as a main battery switch on medium-sized boats or vehicles with twin batteries.

Extra heavy-duty battery cutoff switch for flush mounting. Available with white or black cover. Rated 280A continuous (up to 2500A for 5 sec) to handle large engine loads. Features a removable nickel-plated brass key and waterproof cap. Compliant with ISO 8846 and CE standards, ideal for isolating the main battery on powerboats and yachts.

Heavy-duty ON/OFF battery switch made of black polycarbonate for superior durability. Panel-mount design with flange and included waterproof cap. Rated 280A continuous (2500A for 5 sec) – suitable for larger boat engines and dual-battery systems. Features a fixed knob (non-removable) with a tactile on/off indication. ISO 8846 certified for ignition protection.

Heavy-duty marine battery switch with 3-position rotary function (1-2-BOTH). Rated for 380A instantaneous and 280A continuous current. Ideal for boats using dual 12V battery systems.