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Thunder 300W 20 AMP DC-DC Charger With Solar Regulator TDR02010


Thunder Auto

Product Code: TDR02010

Thunder 300W 20 AMP DC-DC Charger With Solar Regulator TDR02010

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).

  • 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

Designed to charge most 12 volt GEL, AGM, WET and Calcium batteries with a multi-stage charge. Utilizing solar panels or your vehicles alternator, the 20 AMP DC-DC charger boasts a range of safety features to ensure your auxiliary battery is charged without damaging your equipment or system.

Product Specifications:

Charging Style: 8 Stage from vehicle and 3 Stage from solar.
Input: 12.4 - 16.0 Volts DC
Output Voltage: 13.1 - 16.2 Volts (Stops charging when alternator or vehicle battery below 11.9 Volts)
Output Current: 20 AMPS
Minimum Start Voltage For 2nd Battery: 1.5 Volts
Maximum Solar Input Voltage: 25 Volts
Maximum Solar Watt Input: 300 Watts
Soft Start: Yes


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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