Thunder 20A DC-DC Charger

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Product Details

Introducing the Thunder 20A DC-DC Charger, the intelligent and compact solution for efficiently charging your auxiliary battery in any vehicle. This advanced charger utilizes a unique pulse charging algorithm to determine the optimal charge rate for your auxiliary battery, making it the perfect addition for managing a dual battery setup.

Key Features:

  1. Sleek Heavy-Duty Aluminium Case: The charger comes in a durable and stylish aluminium case, ensuring long-lasting performance.
  2. Remote Mount Bluetooth LCD Screen: Monitor your battery's state of charge with better visibility using the remote Bluetooth LCD screen, allowing for easy installation inside the cabin.
  3. 12-24V System Input with 12V Output: Suitable for both 12V and 24V systems, providing versatility for various vehicles.
  4. Upgraded Operating Temperature: With an operating temperature range of 0-90°C, the charger can be installed under the bonnet, even in harsh environments.
  5. IP67 Rated: Water and dustproof design, making it ready for challenging conditions.
  6. Modular Sense Technology (MST): Link multiple units together to achieve a 20A, 40A, or 60A output without the need for a larger unit upfront.
  7. Advanced Charging Technology: The charger's microchip monitoring and control enable high-frequency multistage charging for optimal battery health and longer life.
  8. Multiple Charging Profiles: The charger automatically adjusts charge rate mapping for GEL, AGM, standard Lead Acid, and now, new Lithium battery charging profiles.
  9. Solar Input: The Thunder DC-DC Charger features a new 50V solar input with MPPT regulated output, supporting up to 300W of solar power.
  10. Comprehensive Protection: Enjoy peace of mind with overcharging, short circuit, over-temperature, and reverse polarity protection.


  • Output: 20A
  • Input Fuse Rating Minimum: 30A
  • Output Fuse Rating Minimum: 30A
  • Vehicle Input Voltage Range: 12.2V – 26V
  • Minimum/Maximum Charging Voltages: 13.1V – 15.2V
  • Solar Input Voltage Range: 13V-50V
  • Maximum Solar Watt Input: 300W
  • Charging Style: 8-stage from the vehicle and 3-stage from solar
  • Operating Temperature: 0°C to 90°C
  • IP Rating: IP67
  • Float Voltage: 13.8V
  • Standby Current: 10mA
  • Battery Range: 18 to 250Ah
  • Dimensions (LxWxH): Charger: 190x125x35mm / Display: 75x75x20mm

The Thunder 20A DC-DC Charger offers a smart and efficient charging solution for your auxiliary battery needs. With its advanced technology and comprehensive protection features, it's the perfect addition for caravans, camper trailers, 4WDs, and more. Experience reliable power management on your adventures with Thunder's high-quality DC-DC Charger.

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