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Dual Battery Isolator Kit 12V 140A VSR

KeyLine Chargers ★ 3.8/5 · ItemOracle Score Mid-Range

$100 USD
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Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup - Automatic Disconnect Switch for Car, Truck, RV, UTV, ATV, Marine

Dual battery isolator kit with 12V VSR auto-disconnect for seamless primary/auxiliary power. Compact under-hood design with clear installation guidance

Highlights

  • voltage-sensitive auto-activation
  • reduces power loss compared to diode-based systems
  • compact, versatile installation

Pros

  • automatic voltage-sensitive relay
  • compact footprint
  • seamless power connection between batteries
  • clear instructions

Cons

  • wire length may be too short for some setups

Best For

  • under-hood dual battery installations
  • battery relocation kits
  • marine, RV, and off-road vehicle setups
  • Polaris RZR and similar side-by-sides
  • truck and automotive auxiliary power systems

Features

  • Dual battery isolator kit provides 12V power sharing without voltage drops
  • Smart Voltage Sensitive Relay activates at 13.3V and disengages at 12.8V
  • Compact 2.6 x 2.6 x 2 inch form factor suitable for under-hood or relocation installs
  • Designed to prevent battery drain while maintaining a connection between primary and auxiliary sources

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