Thunder Pack with Thunder Battery Box and 20Amp DC to DC Charger
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Thunder Pack with Thunder Battery Box and 20Amp DC to DC Charger

SKU: TDR02007-TDR02020 Learn More»

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Thunder Pack with Thunder Battery Box and 20Amp DC to DC Charger


  • Thunder Battery Box
  • Thunder 20 AMP DC-DC Charger


Thunder Battery Box:

The Thunder Battery Box provides 12 volt and 240 volt power for common devices and appliances, acting as a dual battery system to manage solar and in-vehicle charge. Featuring a 7 stage smart charger to maintain battery condition, the unit is compatible with leading vehicle batteries, including Lead Acid, Calcium, Gel and AGM up to 130Ah in size. Setting up the Battery Box is simple, with a step-by-step guide that helps you select your type of battery, remembers the last battery you used, and will warn you if there’s a fault during charge.


Dimensions External dimensions: 240mm (W) x 440mm (L) x 327mm (H)
Internal dimensions: 180mm (H) x 330mm (L) x 238mm (H)
Net Weight (kg) 4.6 Kg


Dometic Harrier Brochures


Thunder 20 AMP DC-DC Charger:

Easy to install, the Thunder DC to DC charger is the smart way to charge your auxiliary battery, no matter your vehicle. The Thunder DC-DC Charger utilises a unique pulse charging algorithm with the intelligence to determine the best charge rate for your auxiliary battery (excluding lithium).


Output Current Rating (Amps) 20.0 Amps
Float 13.8V
Standby Current 3mA
Battery Range 18 to 250Ah
Operating Temperature Range 0°C to 60°C (current derates after 60°
Output 20A
Input Fuse Rating Minimum 30A
Output Fuse Rating Minimum 30A
Charging Voltage 13.1V - 15.2V (stops charging when alternator or vehicle battery below 12.2V)
Solar Input Voltage Range 13V-25V
Maximum Solar Watt Input 300W Note: Exceeding 300W of Solar will damage the Thunder DC-DC charger
Input Voltage 12.2V - 17V Note: If voltage increases over 17V the Thunder DC-DC will shut off, reset will be needed.
Warranty 1 Year



  • MPPT solar regulator will regulate solar panels at maximum efficiency capable of up to 300W of solar @ 25V
  • 20A output to charge your auxiliary battery while driving
  • Automatically switches to the solar input when the vehicle battery is turned off or main battery drops to 12.2V
  • Splash resistant (not IP rated)
  • Easy to read and comprehensive LED display
  • Simple to install – 4 mounting holes and 4 easy-to-use wiring studs
  • Rate of charge starts to decrease at 50 degrees and will fully cut out at 80 degrees


Dometic Harrier Operation Manual

SKU TDR02007-TDR02020

Brand Thunder

Product Category Batteries Other

Voltage 12V

Output Current Rating (Amps): 20 Ah

Weight: 6.1 Kg

Dimensions: External dimensions: 440 x 240 x 327mm Internal dimensions: 330 x 180 x 238mm (Battery Box) (L x W x H)

NOTE: see full product specifications & further product info in the Description section on this page.

Warranty Period: 1 Year

Warranty Details: Please CLICK HERE for Warranty Information on this product

  • We ship Australia-wide with national road express freight companies such as Star Track, TNT and Toll.
  • Small Items are sent with Australia Post via regular post.
  • Delivery times are generally 3-5 days from day of dispatch for major cities (sometimes quicker). Please allow longer for regional and remote areas.
  • Once your item(s) have been dispatched, we will provide you freight tracking information so you can track your delivery to your door.
  • Items are fully insured during the freight process.
  • Unfortunately we cannot deliver to PO Boxes.
  • For further details on our Delivery Process you can visit our Delivery Page HERE.

Important Covid-19 Comment: during these difficult times, our dispatch and delivery times are longer than normal. Please allow additional days for delivery over and above the normal estimates outlined above.

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