ITEM NAME:DC 300W 20A CC CV Constant Current Adjustable Step-Down Converter Voltage - 3C.Output Current: 20A(max.)., 15A(suggested). Efficiency: 95%(24V to 12V, 20A). The buck module has 2 heat sink that could enhance heat dissipation. Input and output use high frequency low resistance electrolytic capacitor, low ripple, stable output.