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Nilight 12V 140AMP Dual Battery Isolator Kit with VSR

Nilight ★ 3.2/5 · ItemOracle Score Mid-Range

$110 USD
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Nilight 12V 140AMP Dual Battery Isolator Kit with 6 AWG Power Cable Terminal Voltage Sensitive Relay Smart VSR Automatic Charger Disconnect for Truck Van RV ATV UTV Boat Can Am

Dual battery isolator kit with voltage-sensitive relay to charge two batteries from one alternator. Safe, weatherproof construction with IP66 rating. Customers note easy installation and solid functionality, with some concerns about battery drain and unclear instructions

Highlights

  • automatic dual-battery charging
  • VSR cuts in at 13.3V / cuts out at 12.8V
  • IP66 rated for harsh environments

Pros

  • charges two batteries from one alternator
  • voltage-sensitive relay for automatic operation
  • robust casing and IP66 waterproof rating
  • easy installation (customer insight)

Cons

  • mixed feedback on battery drain
  • some users find the manual unclear
  • occasional charging issues with second battery

Best For

  • truck battery management
  • van or RV auxiliary power
  • ATV/UTV boat electrical system
  • Can-Am and off-road vehicle setups
  • off-grid or remote power systems
  • dual-battery vehicle builds

Features

  • Voltage Sensitive Relay engages at 13.3V and disengages at 12.8V to keep primary battery ready
  • Charges auxiliary battery from the same alternator when engine runs
  • Durable case with silicone seal designed for harsh weather and vibrations
  • IP66-rated protection for use in marine or off-road environments
  • Supports dual-battery setup allowing accessories to run from a separate battery while main stays charged

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