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Automotive battery isolation kit with red cable, switches, and connectors on a white background
  • Automotive battery isolation kit with red cable, switches, and connectors on a white background
  • 12V 140AMP Dual Battery Isolator with installation on vehicle battery system
  • Collection of marine battery accessories including fuse holders, terminals, isolator, and cables on a white background.
  • Wiring diagram for a dual battery isolator with components and labels on a black background.
  • Dual battery isolator with LED voltmeter and manual/auto switch on a white background.
  • Dual battery isolator with water splashes and 'IP68 Waterproof Grade' text on a light blue background
  • Battery wiring kit with red and black cables and a digital indicator on a white background.
  • Hand holding a lighter to a red cable connector with text about cable bonding properties.
  • Automotive battery isolation kit with red cable, switches, and connectors on a white background
  • 12V 140AMP Dual Battery Isolator with installation on vehicle battery system
  • Collection of marine battery accessories including fuse holders, terminals, isolator, and cables on a white background.
  • Wiring diagram for a dual battery isolator with components and labels on a black background.
  • Dual battery isolator with LED voltmeter and manual/auto switch on a white background.
  • Dual battery isolator with water splashes and 'IP68 Waterproof Grade' text on a light blue background
  • Battery wiring kit with red and black cables and a digital indicator on a white background.
  • Hand holding a lighter to a red cable connector with text about cable bonding properties.
5M 12V 140A Split Charge Relay Kit with LED Screen – Voltage Sensitive Relay (VSR) Dual Battery Isolator System for Campervan, RV, Boat, ATV, SUV & Off-Grid Vehicles
£41.99 GBP

🔋 Key Features

  • 💡 Intelligent Dual Mode Control: Easily switch between Auto and Manual modes. Long-press the power button for 3 seconds to toggle between modes — blue LED ON for manual, OFF for auto. The automatic mode engages at 13.3V and disconnects at 12.8V to protect your starter battery.

  • 📊 LED Voltmeter Display: Built-in LED screen clearly displays real-time voltage, letting you instantly monitor battery status. When two batteries are connected, the screen shows the higher of the two voltages for quick reference.

  • 💦 IP68 Waterproof & Durable Build: Constructed from premium materials with a fully sealed IP68 design, this smart relay is resistant to dust, water, and vibration — ideal for harsh outdoor or marine environments.

  • 🔧 Complete Installation Kit Included: Supplied with everything you need — heavy-duty cables, fuses, terminals, heat-shrinks, ties, fixings, and instruction manual — for a fast and reliable setup. No specialist tools required.

  • 🔋 Safe & Efficient Power Management: Automatically charges the auxiliary battery while protecting the starter battery from over-discharge. Ensures both batteries remain in top condition for dependable vehicle starts and off-grid power supply.

  • 🚙 Wide Compatibility: Perfect for use in campervans, RVs, motorhomes, boats, ATVs, 4x4s, trucks, and other 12V dual-battery systems. Provides a stable and efficient power connection for lighting, fridges, and other electrical equipment.

📦 Package Includes

  • 1 × 140A Voltage Sensitive Relay (VSR) with LED Display

  • 4 × PVC Power Cables (4m / 0.5m / 0.25m / 0.25m)

  • 1 × Black Earth Cable

  • 2 × Fuse Holders & 4 × Fuses

  • 2 × Battery Terminals (Positive & Negative)

  • 4 × Insulated Ring Terminals, 7 × Heat Shrinks

  • 9 × Foam Sticky Pads, 10 × Cable Ties, 18 × Screws

  • 1 × Installation Manual

⚙️ Specifications

  • Voltage: 12V DC

  • Current Rating: 140A

  • Contact Type: Normally Closed

  • Contact Material: Bronze

  • Mounting Type: Chassis Mount

  • Waterproof Rating: IP68

  • Operating Temperature: −40°F to 185°F

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