Wiring: INPUT+ to BAT+, INPUT- to BAT-, OUTPUT+ to LOAD+, OUTPUT- to LOAD-
Reminder: Never reverse the polarity. Use the big enough cables to avoid the voltage drop. Never connect to solar panels or wind turbines. Never charge the battery.

Daygreen P/N: H10-1224-48
Efficiency: 95%
Input Voltage: 11-35VDC
Output Voltage: 48VDC
Output Current: 10A
Ripple: 200mVp
Line Regulation: ±0.2%
Load Regulation: ±0.2%
Voltage Accuracy: ±1.5%
Enclosures: IP68
Dimension: 100*80*40mm
Net Weight: 0.5kg
Case Operating Temperature: -40~85°C
Certificates: CE Rohs
Warranty: 2-year
MTBF: 100,000 hours

Application:
12V/24V DC battery of vehicles as input power to 48VDC 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 standards.
If the load device is a motor or compressor, you may choose 10A/0.5=20A according to real testing results since the motor and compressor starting current may be 2-3 times than nominal current.