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300A Battery Switch 3 Position Dual Circuit
300A Battery Switch 3 Position Dual Circuit
SKU:CVB-3POST-BAT-S
In stock
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300A Battery Switch 3 Position Dual Circuit
📝 300A 3-Position Dual Circuit Battery Switch
The 300A 3-Position Dual Circuit Battery Switch gives you complete control over two independent battery sources. With positions for OFF, Battery 1, and Battery 2, it’s perfect for dual-battery campervan, caravan, RV, marine, 4WD, and commercial setups. Built with ignition-protected construction and high-current capability, it delivers safe, reliable switching for demanding electrical systems.
⭐ Essential Benefits
• Three-position power control – isolate all power or select Battery 1 or Battery 2.
• High current capacity – 300A continuous, 500A continuous for 5 minutes, 900A 30-second peak.
• Ignition-protected design – safe for marine, engine bay, and enclosed installations.
• Wide voltage range – suitable for 12v, 24v, and 32v DC systems.
• Dual-battery ready – ideal for setups needing selectable power sources.
⚙️ Functionality
Turn the rotary knob to fully isolate the system (OFF) or direct power from Battery 1 or Battery 2. The switch’s heavy-duty internal contacts are rated to manage high-load devices such as inverters, winches, starters, fridges, and auxiliary equipment. Its ignition-protected enclosure ensures safe operation in marine and engine environments.
🔌 Compatibility
• 12v, 24v, and 32v DC systems
• Campervans, caravans, RVs, 4WDs, boats, machinery, trucks
• Dual-battery systems, power changeover, emergency isolation
🧰 Installation Difficulty
🟡 3/5 (Moderate)
Surface-mount installation with straightforward M10 3-post wiring and included screws.
🔍 Features
• Positions – OFF / 1 / 2
• High-load switchgear – 300A continuous, 500A (5 minutes), 900A (30 seconds)
• Ignition protection – safe in fuel-rich or enclosed spaces
• Durable ABS housing – vibration and corrosion resistant
• Rotary actuation – positive indexing for secure switching
📊 Specifications
| Specification | Value |
|---|---|
| Operation Mode | ON-OFF / 3-position selector |
| Continuous Current | 300A |
| 5-Minute Continuous Rating | 500A |
| Peak Current (30 seconds) | 900A |
| Maximum Voltage | 32v DC |
| Switch Positions | OFF / 1 / 2 |
| Contact Type | Normally open |
| Connector Type | M10 screw posts (3-post) |
| Product Dimensions | 10 × 10 × 9 cm (approx) |
| Item Weight | 352 g |
| Protection Rating | Ignition protected |
| Mounting Style | Surface mount |
📦 What’s Included
• 1× 300A 3-Position Dual Circuit Battery Switch
• 4× Mounting screws
🙌 Why Choose This Product?
This 300A dual-circuit isolator provides dependable control for two battery sources in one compact, ignition-protected unit. With a 500A extended-load rating and 900A peak capability, it’s engineered for serious off-grid, marine, and automotive electrical systems. Whether isolating for safety or selecting between sources, it offers rugged, worry-free performance.
🚀 Our Promise
Order today for same-day dispatch and upgrade your power system with reliable, high-current switching built for adventure.

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Tested for Reliability
All products are tested in real Aussie off-grid conditions before we stock them.
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Fast Dispatch
Order before 3 PM AEST for same-day shipping from Geelong, VIC.
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Quality Over Price
We only stock products we’d use ourselves—even if they cost a bit more.
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.


















