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300A 12V-48V High Current Battery Isolating Switch
300A 12V-48V High Current Battery Isolating Switch
SKU:sw-iso-300
Out of stock
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300A 12V-48V High Current Battery Isolating Switch
📝 300A Red On/Off Battery Switch
The 300A Red On/Off Battery Switch is a high-quality, reliable solution for safely managing power in campervans, RVs, motorhomes, caravans, 4WDs, and off-grid systems. Designed to provide a secure way to disconnect your battery bank, it protects your electrical components, prevents accidental drain, and improves long-term system reliability. Compact, durable, and easy to use, it’s an essential addition for both DIY builders and professional installers.
⭐ Essential Benefits
• 300A continuous rating – Handles the demands of modern campervan and off-grid electrical systems.
• 900A peak rating – Supports high-startup loads from inverters and heavy appliances.
• Easy rotary ON/OFF control – Quick and intuitive battery isolation.
• Durable construction – Built from robust, corrosion-resistant materials.
• Flexible installation – Suitable for surface or panel mounting in tight or open spaces.
• Improved safety – Helps prevent electrical fires and accidental battery drain.
⚙️ Functionality
Installed inline on the positive battery cable, the switch provides reliable mechanical isolation when performing maintenance, storing your vehicle, or safeguarding circuits. Its clear red rotary actuator offers a firm, positive ON/OFF action, giving you complete control over your electrical system.
🔌 Compatibility
• Works with 12V, 24V, 36V, and 48V systems
• Suitable for AGM, lithium, wet, gel, and calcium batteries
• Ideal for campervans, caravans, RVs, 4WDs, boats, and off-grid setups
• Supports inverters, DC-DC chargers, fuse panels, compressors, and high-load accessories
🧰 Installation Difficulty
🟡 3/5 (Moderate)
Requires correct cable sizing, crimped lugs, and secure mounting.
🔍 Features
• Red rotary ON/OFF actuator
• High-current internal switching
• Heavy-duty M10 terminal posts
• IP66 weather-resistant housing
• Compact construction for versatile mounting
• Suitable for harsh environments in mobile and marine builds
📊 Specifications
| Specification | Value |
|---|---|
| Input Voltage | 12–48V DC |
| Operation Mode | ON–OFF |
| Continuous Current Rating | 300A |
| Peak Current (30 sec) | 900A |
| Number of Positions | 2 |
| Terminal Size | M10 (3/8") |
| Actuator Type | Rotary |
| Ingress Protection Rating | IP66 |
| Product Dimensions | 75 × 75 × 85mm |
| Mounting Style | Surface or panel mount |
| Housing Material | Heavy-duty composite |
📦 What’s Included
• 1 × 300A Red On/Off Battery Switch
🙌 Why Choose This Product?
The 300A Red On/Off Battery Switch offers dependable isolation, rugged construction, and the current capacity required for modern electrical systems. Whether you're building a van conversion, upgrading a caravan, or wiring an off-grid system, this switch ensures long-term safety and performance for your setup.
🚀 Our Promise
Order today for same-day dispatch and enjoy a safer, more reliable electrical system on your next adventure.
Our Commitment
At Campervan Builders, our commitment is simple: we only supply quality campervan, caravan, motorhome, and RV parts that we’ve personally tested in real off-grid conditions. From interior LED lighting to Starlink 12V conversion kits, every product is chosen for reliability, durability, and ease of installation. We back this with fast shipping Australia-wide, friendly support, and honest advice to help DIY builders and professionals alike. When you shop with us, you’re choosing proven gear that keeps you connected and comfortable on every adventure.