Wiring: INPUT+ to BAT+, INPUT- to BAT-, OUTPUT+ to LOAD+, OUTPUT- to LOAD-
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.

Daygreen P/N: A1U4810
Efficiency: 95%
Input Voltage: 11-45VDC
Output Voltage: 48VDC
Output Current: 10A
Ripple: 400mVp
Line Regulation: ±0.2%
Load Regulation: ±0.2%
Voltage Accuracy: ±1.5%
Enclosures: IP68
Dimension: 103*113*35mm
Net Weight: 0.7kg
Case Operating Temperature: -40~85°C
Certificates: CE Rohs
Warranty: 3 years
MTBF: 100,000 hours

Application:
12V/24V/36V DC battery of vehicles as input power to 48VDC appliances as output load.

How to choose the correct current for loads?
For example, if the max current of your load device is 10A, then choose 10A/0.7=14.28A 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.