Dual Battery Voltage Sensitive Relay 12V 100A

Automatic Dual Battery Protection – Simple. Reliable. Proven.

The VSR100 Voltage Sensitive Relay is a 12V 100A battery isolator designed to automatically manage charging between your starter and auxiliary battery.

When your engine is running and voltage rises, the VSR100 connects your auxiliary battery for charging. Once the engine is switched off and voltage drops, it automatically isolates the batteries — protecting your starter battery from being drained by fridges, lights, compressors or other accessories.

Key Features:

• ✔ 100A continuous rating
• ✔ Fully automatic voltage sensing operation
• ✔ Protects starter battery from discharge
• ✔ Compact and durable design
• ✔ Ideal for 12V dual battery systems

Ideal For:

• 4WD dual battery setups
• Canopies & tray builds
• Camping & touring vehicles
• Work & trade vehicles

Whether you're fitting out a tourer or upgrading a work rig, the VSR100 offers a straightforward, dependable solution for managing your dual battery system.