300a high current battery isolating switch for 12v to 48v systems
heavy duty battery isolation switch for campervans
rv battery cut off switch rated to 300a
reliable battery disconnect switch for off grid systems
12v to 48v battery isolation switch for van conversions

300A 12V-48V High Current Battery Isolating Switch

5.02 reviewsSold out SKU sw-iso-300
$55.00inc. GST

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  • Aussie warranty1 year, handled locally
  • Geelong supportReal people, real answers
  • Same day shippingOrder by 3pm AEST
$55.00Sold out
Details

The full rundown

A 300A on/off battery switch for safely disconnecting your battery bank. Fit it in a campervan, RV, caravan or 4WD to protect the system when it's parked up or being worked on.

Why it works

  • 300A continuous rating: Handles the demands of modern campervan and off-grid electrical systems.
  • 900A peak rating: Supports high-startup loads from inverters and heavy appliances.
  • Easy rotary ON/OFF control: Quick and intuitive battery isolation.
  • Durable construction: Built from robust, corrosion-resistant materials.
  • Flexible installation: Suitable for surface or panel mounting in tight or open spaces.
  • Improved safety: Helps prevent electrical fires and accidental battery drain.

What's in the box

  • 1 x 300A Red On/Off Battery Switch

How it works

Installed inline on the positive battery cable, the switch provides reliable mechanical isolation when performing maintenance, storing your vehicle, or safeguarding circuits. Its clear red rotary actuator offers a firm, positive ON/OFF action, giving you complete control over your electrical system.

What it suits

  • Works with 12V, 24V, 36V, and 48V systems
  • Suitable for AGM, lithium, wet, gel, and calcium batteries
  • Ideal for campervans, caravans, RVs, 4WDs, boats, and off-grid setups
  • Supports inverters, DC-DC chargers, fuse panels, compressors, and high-load accessories

Fitting it

Difficulty: 3/5 (Moderate). Requires correct cable sizing, crimped lugs, and secure mounting.

Features

  • Red rotary ON/OFF actuator
  • High-current internal switching
  • Heavy-duty M10 terminal posts
  • IP66 weather-resistant housing
  • Compact construction for versatile mounting
  • Suitable for harsh environments in mobile and marine builds

Specifications

Input Voltage 12-48V DC
Operation Mode ON-OFF
Continuous Current Rating 300A
Peak Current (30 sec) 900A
Number of Positions 2
Terminal Size M10 (3/8")
Actuator Type Rotary
Ingress Protection Rating IP66
Product Dimensions 75 x 75 x 85mm
Mounting Style Surface or panel mount
Housing Material Heavy-duty composite
Reviews

What owners say

  • 5 stars: 2 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
G
Graeme Campbell

good product. quick delivery

S
Samuel Hunt

Heavy duty. Feels good.

From the Treklo crew

G'day, we're Treklo

We're a handful of blokes in Geelong who spend our weekends in utes, vans and campers. We got sick of 12V gear that gave up a few trips in, so we started making our own and running it in our own rigs first.

Not sure what you need? Flick us an email and one of us will sort you out. No sales script, just straight answers.

  • We run it ourselves

    Every bit of gear goes in our own rigs before it goes on the site.

  • Out the door today

    Order by 3pm AEST and it leaves Geelong the same day.

  • Sorted here if it plays up

    1 year Aussie warranty, handled by us, not a call centre.