Dual Battery Isolator 300A VSR for 12V systems

KeyLine Chargers ★ 3.7/5 · ItemOracle Score Mid-Range

$115 USD
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Dual Battery Isolator Heavy Duty 300 AMP 1000 AMP Peak Voltage Sensitive Relay VSR for 12 Volt Systems - Works with All Batteries Types Including Lithium and LiFePO4

Voltage Sensitive Relay dual battery isolator for 12V systems supporting various battery types. Cuts in at 13.3V and out at 12.8V to keep the start battery charged. Users report easy installation and clear instructions alongside solid battery capacity support

Highlights

  • 300 amp dual battery isolator
  • VSR with 13.3V/12.8V control
  • IP65 protection rating

Pros

  • high current capability (300 amp)
  • voltage sensitive switching
  • supports multiple battery types including lithium
  • IP65 certified for dust and water resistance
  • easy to install with clear instructions

Cons

  • wire length may be insufficient for some setups
  • mixed battery charging experiences reported by users

Best For

  • high-capacity auxiliary battery systems
  • off-road vehicles and dust/water exposure
  • homes or cabins with dual battery setup
  • vehicles with inverters and accessories
  • Polaris RZR or similar off-road rigs

Features

  • 300 A continuous, 300 A peak dual battery isolator for high-capacity setups
  • Voltage Sensitive Relay engages at 13.3 V and disengages at 12.8 V
  • IP65 rating for dust and water resistance in demanding environments
  • Compact form designed to fit under the hood or near batteries
  • Isolator sold standalone with mounting hardware; installation accessories sold separately

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