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Forget the traditional diode relays and so-called "solid state" devices that can rob you of almost 2 amps of output voltage! The ATEM POWER Dual Battery Isolator is the only SMART unit designed with cutting edge programming to deliver optimum performance - with ZERO sacrifice. This compact battery isolator was built ultra-small (1" x 1" x 3") to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries.

When the engine is started, the starting and auxiliary batteries are separated allowing only the starting battery to be charged. When the charge voltage reaches 13.3 volts the VSR engages allowing both starting and auxiliary batteries to be charged. This is indicated by the red light in the top LH corner being illuminated. When the engine is stopped and the battery voltage falls below 12.8 volts the VSR disengages separating the start and auxiliary batteries. The auxiliary battery continues to power any accessories without risk of draining the starting battery.
This VSR is "Dual Sensing" which senses the voltage of both batteries.This is very useful in that being Dual Sensing (bi directional), you have a battery charger or solar power connected to your auxiliary battery and this battery gets charged enough to the VSR's set points , the VSR then will allow your charging source to back charge the cranking battery as well bringing that to fully charged as well but again, if the voltage drops below 12.8 volts, the VSR will again disconnect (isolate) the batteries.
Unlike other chargers on the market today, the ATEM POWER Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your ATEM POWERcharger is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments.


Continuous Current 140A
Max Current 160A
Current Draw - Charging 280mA
Current Draw - Standby 8mA
Disengage Delay 5-10 Seconds
Recommended Fuse 80Amp
Power Studs M6 Stainless Steel
Surge Protection Built-in
Dimensions 69mm(W)x15mm(L)x3mm(H)
Weight 300g


1 Year Warranty

What's In Box

  • 1x 12V Voltage Sensitive Relay,1x 5/16” Lug Cable End,2x 3/8” Lug Cable End,2x Red Shrink Tube,2x Hook and loop Velcro

  • 1x 7AWG X 24" Red Battery Cable Cut to Length (W/Single Connection)

  • 1x 7AWG X 12“ Length Red Battery Cable (W/Two Connectors)

  • 1x 12" Length Battery to Ground Cable (W/Two Connectors)


  • Please note that deliver to PO BOX address is available for products below 22kg and 1M length. Please make sure you have provided a correct physical address during checkout on products of excessive size.
  • Our shipping system cannot accept order changes or cancellation after payment is made. You can follow our return policy for more information.
  • To aim in smooth and speed of delivery, ensure your address is correct during the checkout. With correct information provided, your order is dispatched within 1 business day. Any changes to address after payment made will not be considered.
  • Please allow 2 to 12 business days for product to arrive. We highly recommend to provide an answerable contact number and email address as we do make call to follow up item delivery status.
  • Your item will be sent via Australia Post or courier depending on its size and weight.


We accept returns. Please contact our customer service team immediately if:

  • You changed your mind and wish to request a return
  • Your product was damaged during transit
  • You wish to make a warranty claim for any product you have purchase
  • Under no circumstances we accept CHANGE OF MIND return 30 days after you receive the item!
  • A 20% restocking fees will apply to final reimbursement to cover labor cost, P&H, restocking, freight.
  • The item must be returned at the buyer's cost in original re-saleable condition with all tags and packaging (ready to be put back on the shelf)
  • Please note that we do not accept return of oversize products like Bulky solar panels, Kayaks, Batteries and Winches which may cause in transit damage.


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