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Dual Battery Isolator Kit, 12V 300 Amp 20 ft 2AWG

Dual Battery Isolator Kit, 12V 300 Amp 20 ft 2AWG

Best price now

$179.76at So Awesome GadgetsChecked Nov 10

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Price facts

  • Last seen at $179.76 at So Awesome Gadgets on Nov 10.

Our take on the Dual Battery Isolator Kit, 12V 300 Amp 20 ft 2AWG

A 12V voltage sensitive relay kit that automatically links a second battery to the charging system when the main battery reaches charging voltage, then disconnects it when the engine is off. The 300A rating and 2AWG cable suit winches, UTVs and dual-battery off-road setups. It adds a voltmeter and LCD screen plus a manual override mode, which many basic isolators lack. It is aimed at owners wiring a house or accessory battery who want automatic charging without a manual switch every time.

Best forUTV and off-road dual-battery buildsOwners adding a second battery for winches or accessoriesCampers and overlanders charging an auxiliary battery from the alternatorDIY installers who want a voltmeter and manual override
Pros
  • 300A rating handles winch and heavy accessory loads
  • Automatic voltage sensing connects and disconnects the second battery
  • Manual mode lets you link or isolate batteries yourself
  • Built-in voltmeter and LCD screen show battery status
  • 2AWG cable included for the main run
  • Compact plastic housing mounts in tight spaces
Cons
  • No smart charging profile; it is a relay, not a DC-DC charger
  • Lithium support depends on the battery's own BMS limits
  • Instructions and wiring guidance are thin for beginners
  • Voltmeter accuracy is basic compared with a dedicated gauge

Dual Battery Isolator Kit, 12V 300 Amp 20 ft 2AWG prices at every store

  • So Awesome GadgetsNew

    In stockReturn policy

    $179.76Checked Nov 10
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About the Dual Battery Isolator Kit, 12V 300 Amp 20 ft 2AWG

This dual battery isolator kit connects and manages two 12V batteries. It is a voltage sensitive relay (VSR) with a voltmeter and an LCD screen. It works with lithium batteries and is intended for use in UTVs.

The isolator runs in manual or automatic mode. The kit comes with 20 ft of 2 AWG copper wire. The isolator body is made of PA6 plastic and has a compact size.

Rated voltage
DC 12V
Rated current
300A
Cable
20 ft, 2 AWG
Modes
Manual and automatic (VSR)
Display
LCD screen with voltmeter
Compatibility
Lithium batteries
Material
PA6 plastic isolator, copper wire
Color
Black
Model
VSR005-1
Product size
3.5 x 3.5 x 3.1 in (90 x 90 x 80 mm), L x W x H
Weight
7.3 lbs (3.3 kg), including all accessories

Questions and answers

How does a voltage sensitive relay work?
It connects the second battery to the main one only when the charging voltage rises above a set threshold, so the auxiliary battery charges while the engine runs. When voltage drops after shutdown, it disconnects so the starting battery is not drained.
Is this a DC-DC charger?
No. It is a relay that links two batteries. It does not boost or regulate charging voltage, so a battery that needs a specific charge profile, such as some lithium packs, may need a DC-DC charger instead.
Can it work with lithium batteries?
It is listed as compatible with lithium batteries, but the battery's own BMS still controls charging. Check that your lithium battery accepts alternator voltage before relying on the relay alone.
What is the 300A rating for?
The 300A rating covers the current that can pass between the batteries, which matters for winches and high-draw accessories. Keep cable runs short and fused to stay within that rating.
What is in the kit?
The kit includes the isolator relay with voltmeter and LCD screen, the 2AWG cable run and mounting hardware. Check the listing contents for the exact cable length and terminals included.
Can I switch it manually?
Yes. It has a manual mode alongside automatic voltage sensing, so you can link the batteries for self-recovery or isolate them when parked.
Where is the Dual Battery Isolator Kit, 12V 300 Amp 20 ft 2AWG cheapest?
At So Awesome Gadgets, for $179.76, as of our latest check.

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