uxcell Big-Size Voltage Buck Converter Regulator DC 24V Step-Down to DC 12V 25A 300W Waterproof Power Transformer Waterproof IP68 Voltage Converter Regulator DC 24V(20V-36V) to DC 12V 25A 300W. Protections: Over-load, Over-current, Over-temperature, Short-circuit, Over-voltage. Auto-recovery when device is back to normal operating; high transfer efficiency of 96.5% max.. Die-cast aluminum shell, anti-shock, and moisture-proof and has stronger durability.Widely used in bus, cmb, large trucks, motor, solar generate electricity, display screen of bus and taxi, car audio device Note: It is recommended to use stable DC power for the input power supply If you use the pulsed DC power provided by the generator, please filter it with capacitor before connecting it to the converter. If you use solar panel to supply directly, please note that the open circuit voltage of the solar panel cannot exceed the maximum withstand voltage of the converter. The supply voltage should be within the rated voltage and always leave a certain margin.