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NEW! THUNDER 12V Programmable Electronic Dual Battery Isolator 100AMP TDR15100


Thunder Auto

Product Code: TDR15100

Battery Isolators prevents auxiliary items such as fridges from drawing too much power from your vehicle’s starting battery and draws power only from the auxiliary battery when the vehicle is not running. It also helps manage charging by first allowing charge to flow only through to the main battery, before connecting charge to the auxiliary battery once the main battery reaches a pre-determined charge level.

In a standard dual battery setup, when your vehicle is turned off, your fridge will draw power from both the starting battery and the auxiliary battery. If your fridge is running all night, it could potentially drain your vehicle’s starting battery, preventing you from starting the vehicle the next day. Thunder’s Battery Isolator detects when the starting battery drops below 12.8 volts, directing charge only from the auxiliary battery, preventing the main battery from draining.

Part No. TDR15100
Unit of Measure EACH
Voltage 12
Note 9.2v to 16v
Weight 1.2kg
Item Type Dual battery isolator
Continuous Rating 100A
Cut In Voltage 9.2v
Cut Out Voltage 9v
In Rush Current 500a
Rated Current 100a

Fast Dispatch

Once payment has cleared we will post your item as soon as possible. However, If the item is purchased after 2pm, it will be shipped the next day.

Combined Shipping

We combine shipping for orders with multiple items to save our customers money on postage.


Most orders will be sent with a tracking number, to confirm if your item has tracking please contact us.

Please note:

Additional postage charges may apply for regional or remote areas, please contact us if you are unsure about your area.

All efforts will be made to send out orders as soon as possible so you receive your item on time. However please be aware that once an item is sent from our warehouse it is out of our control.

If you would like registered post with signature on delivery and insurance please contact us before purchasing the item.

As per Australia Post policy, all EXPRESS postage automatically have ATL (Authority to leave) which means if you’re not home at the time of delivery it will be left on the premise in a location deemed safe by Australia Post. More information about ATL can be found here

Local Pickup: Please allow up to 2 business days for local pickups

Please ensure your contact number is included and correct. Failure to do so could result in delayed shipping and/or extra delivery charges in the event of a missed delivery.

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