The DC-DC Power Supply module for Ubiquiti's EdgePower device is designed to fit perfectly into either of the EdgePower's two module ports. The DC-DC module accepts 22-60VDC input and supplies 56VDC output.
Each installed module provides 150w of output power. Installing a second AC-DC or a DC-DC power module allows for 300w of output or the second module can act as an automatic backup power supply should the first one fail.