Thunder 20A DC to DC Battery Charger with Solar Input (TDR02021)

Upgrade your dual-battery setup with the Thunder 20A DC to DC Battery Charger with Solar Input (TDR02021). Engineered specifically for 4WDs, caravans, campers, and boat setups, this intelligent 20-amp charger ensures your auxiliary battery stays fully charged whether you are driving down the highway or set up off-grid on solar power.

Key Features & Highlights

• Dual Input with Integrated MPPT Solar Regulator: Intelligently manages power from both your vehicle's alternator and external solar panels, maximizing charging efficiency while parked off-grid.

• Smart 8-Stage Automatic Charging: Microprocessor-controlled multi-stage charging profile automatically optimizes battery life, prevents overcharging, and ensures a deep, complete charge.

• Multi-Chemistry Battery Compatibility: Compatible with a wide range of battery types including Gel, AGM, Wet/Lead-Acid, Calcium, and Lithium (LiFePO4) batteries.

• Heavy-Duty & Weather-Resistant Construction: Housed in a compact, durable alloy casing with IP67 water and dust resistance, making it suitable for under-bonnet installation, canopy walls, or caravan toolboxes.

• Built-In Safety Protections: Offers comprehensive protection against over-voltage, under-voltage, over-temperature, reverse polarity, and short circuits to keep your vehicle power system safe.