Daygreen Voltage Regulator DC DC 48V 60V 72V Step Down to DC 12V 13.8V 10A Buck Transformer Converter, Non-Isolated

Wiring: OUTPUT+ to LOAD+, OUTPUT- to LOAD-; INPUT+ to BAT+, INPUT- to BAT- Reminder: Never reverse the polarity. Use the enough big cable to avoid the voltage drop. Never connect to solar panel or wind turbine. Never charge the battery. Keep good air convection. Daygreen P/N: B10-72-13R8 Efficiency: 95% Input Voltage: 40-90VDC Output Voltage: 13.8VDC Output Current: 10A No-load current: <0.1V Ripple: 200mVp Line Regulation: 0.2% Load Regulation: 0.2% Voltage Accuracy: 1.5% Enclosures: IP68 Dimension: 74*74*30mm Net Weight: 0.28kg Case Operating Temperature: -40~85C Certificates: CE Rohs Warranty: 1 year MTBF: 100,000 hours Application: 48V/60V/72VDC battery of vehicles as input power to 12VDC appliances as output load. Questions How to choose the correct current for loads? For example, if the max current of your load device is 10A, then choose 10A/0.8=12.5A at least for resistive loads according to international standard. If the load device is motor or compressor, then you may choose 10A/0.5=20A according to real testing result since the motor and compressor starting current may be 2-3 times than nominal current.