Wiring: OUTPUT+ to LOAD+, OUTPUT to LOAD ; INPUT+ to BAT+, INPUT to BAT Note: Never connect to solar panel, PWM/MPPT charge controller, inverter or wind turbine. Never charge the battery. Keep good air convection. Never reverse the polarity. Use the enough big cable to avoid the voltage drop. Specifications: 1. 100% full power and stable current output, non isolated module. 2. Industry grade DC 12V to DC 48V 3A 145W step up converter, efficiency up to 95%. 3. Die cast aluminum shell, epoxy potting, cooling by air convection; Waterproof level IP68 and anti shock protection. 4. Protections: Over current, Over voltage, Over temperature, Over load and Short circuit, auto recovery when device is back to normal operating. 5. Certificates: CE/RoHS, 1 year , up to 100,000 hours. Input Rated Voltage: 12V DC Input Voltage Range: 10V 16 DC Output voltage: 48V DC Output Current: 3 Amp Output Rated Power: 145W Efficiency: 97% (half load); 95% (full load) Ripple: 200mVp Line Regulation: ±0.2% Load Regulation: ±0.2% Voltage Accuracy: ±1.5% Enclosures: IP68 Case Operating Temperature: 40 85°C Weight: 280g Dimensions(WxDxH):2.9'' x2.9'' x1.2'' / 7.4x7.4x3.1cm Fixing Hole Diameter: 5mm(0.20 inch)